TC7660IOA中文资料
icl7660中文资料_数据手册_参数
TL7660中文资料
TL7660 CMOS VOLTAGE CONVERTER
SCAS794 – JUNE 2006
APPLICATIONS
• On-Board Negative Supplies • Data-Acquisition Systems • Portable Electronics
D, DGK, OR P PACKAGE (TOP VIEW)
NC 1 CAP+ 2 GND 3 CAP− 4
8
V CC
7 OSC
6 LV
5
V OUT
NC − No internal connection
DESCRIPTION/ORDERING INFORMATION
The TL7660 is a CMOS switched-capacitor voltage converter that perform supply-voltage conversions from positive to negative. With only two noncritical external capacitors needed for the charge pump and charge reservoir functions, an input voltage within the range from 1.5 V to 10 V is converted to a complementary negative output voltage of –1.5 V to –10 V. The device can also be connected as a voltage doubler to generate output voltages up to 18.6 V with a 10-V input.
TC7662C
1 2 3 4 5 6 7 8
符号
NC C+ GND CVOUT NC OSC VDD
说明
无连接。 电荷泵电容正接线端。 接地端。 电荷泵电容负接线端。 输出电压。 无连接。 振荡器控制输入。 利用外部电容旁路来降低振荡器频率。 正电源电压输入。
DS21468B_CN 第4 页
2008 Microchip Technology Inc.
RO ≅ 2(RSW1 + RSW2 + ESRCP) + 2(RSW3 + RSW4 +
ESRCP) +
1 fPUMP x CP
+ ESRCR
（fPUMP
=
fOSC 2
，RSWX
=
MOSFET
开关电阻）
将这四个 RSWX 项合并为 RSW，我们得出：
RO ≅ 2 x RSW +
1 fPUMP x CP
TC7662A
电荷泵 DC-DC 转换器
特性
• 宽工作电压范围 - 3V 至 18V
• 增大的输出电流 （40 mA） • 与 ICL7662/SI7661/TC7660/LTC1044 引脚兼容 • 无需外接二极管 • 低输出阻抗 @ IL = 20 mA
- 40Ω （典型值） • 无需低电压终端器件 • CMOS 结构 • 采用 8 引脚 PDIP 和 8 引脚 CERDIP 封装
8 引脚 CERDIP ....................................... 800 mW 8 引脚 PDIP............................................. 730 mW 封装热阻 CPA 和 EPA θJA ................................... 140 °C/W IJA 和 MJA θJA .................................... 90 °C/W 工作温度范围 C 后缀 ............................................0°C 至 +70°C I 后缀 ...........................................-25°C 至 +85°C E 后缀...........................................-40°C 至 +85°C M 后缀 ........................................-55°C 至 +125°C 储存温度范围 .....................................-65°C 至 +150°C
TC7660
TC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTERFEATURESs Converts +5V Logic Supply to ±5V Systems Wide Input Voltage Range....................1.5V to 10V s Efficient Voltage Conversion.........................99.9% s Excellent Power Efficiency...............................98% s Low Power Supply...............................80µA @ 5V IN s Low Cost and Easy to Use— Only Two External Capacitors Requireds RS232 Negative Power Supplys Available in Small Outline (SO) Packages Improved ESD Protection.......................Up to 3kV s No Dx Diode Required for High Voltage Operation GENERAL DESCRIPTIONThe TC7660 is a pin-compatible replacement for the Industry standard TC7660 charge pump voltage converter. It converts a +1.5V to +10V input to a corresponding – 1.5V to -10V output using only two low-cost capacitors, eliminat-ing inductors and their associated cost, size and EMI.The on-board oscillator operates at a nominal fre-quency of 10kHz. Operation below 10kHz (for lower supply current applications) is possible by connecting an external capacitor from OSC to ground (with pin 1 open).The TC7660 is available in both 8-pin DIP and 8-pin SOIC packages in commercial and extended temperature ranges.ORDERING INFORMATIONPIN CONFIGURATION (DIP and SOIC)TC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTERABSOLUTE MAXIMUM RATINGS*Supply Voltage......................................................+10.5V LV and OSC InputsVoltage (Note 1)..........................– 0.3V to (V++0.3V)for V+ < 5.5V(V+ – 5.5V) to (V++0.3V)for V+ > 5.5V Current Into LV (Note 1).....................20 µA for V+ > 3.5V Output Short Duration (V SUPPLY≤ 5.5V)........Continuous Power Dissipation (T A≤ 70°C) (Note 2)CerDIP............................................................800mW Plastic DIP......................................................730mW SOIC...............................................................470mW Operating Temperature RangeC Suffix..................................................0°C to +70°CI Suffix...............................................– 25°C to +85°CE Suffix.............................................– 40°C to +85°CM Suffix...........................................– 55°C to +125°C Storage Temperature Range................– 65°C to +150°C Lead Temperature (Soldering, 10 sec).................+300°C *Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. Stresses above those listed under "Absolute Maximum Ratings" may cause perma-nent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.ELECTRICAL CHARACTERISTICS:Specifications Measured Over Operating Temperature Range With,V+ = 5V, C OSC = 0, Test Circuit (Figure 1), unless otherwise indicated. Symbol Parameter Test Conditions Min Typ Max Unit I+Supply Current R L = ∞—80180µA V+H Supply Voltage Range, High Min ≤ T A≤ Max,3—10VR L = 10 kΩ, LV OpenV+L Supply Voltage Range, Low Min ≤ T A≤ Max, 1.5— 3.5VR L = 10 kΩ, LV to GNDR OUT Output Source Resistance I OUT = 20mA, T A = 25°C—70100ΩI OUT = 20mA, 0°C ≤ T A≤ +70°C——120Ω(C Device)I OUT = 20mA, – 40°C ≤ T A≤ +85°C——130Ω(I Device)I OUT = 20mA, –55°C ≤ T A≤ +125°C—104150Ω(M Device)V+ = 2V, I OUT = 3 mA, LV to GND—150300Ω0°C ≤ T A≤ +70°CV+ = 2V, I OUT = 3 mA, LV to GND—160600Ω– 55°C ≤ T A≤ +125°C (Note 3)F OSC Oscillator Frequency Pin 7 open—10—kHz P EFF Power Efficiency R L = 5kΩ9598—%V OUT E FF Voltage Conversion Efficiency R L = ∞9799.9—%Z OSC Oscillator Impedance V+ = 2V—1—MΩV+ = 5V—100—kΩNOTES: 1.Connecting any input terminal to voltages greater than V+ or less than GND may cause destructive latch-up. It is recommended that no inputs from sources operating from external supplies be applied prior to "power up" of the TC7660.2.Derate linearly above 50°C by 5.5 mW/°C.3.TC7660M only.4.The TC7660 can be operated without the Dx diode over full temperature and voltage range.TC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTERTYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 1)12108642Operating Voltage vs. TemperatureS U P P L Y V O L T A G E (V )010k 1k100ΩO U T P U T S O U R C E R E S I S T A N C E (Ω)Power Conversion Eff. vs. Osc. Freq.TEMPERATURE (°C)OSCILLATOR CAPACITANCE (pF)10k O S C I L L A T O R F R E Q U E N C Y (H z )11k1001010100100010k10ΩTC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTERTYPICAL CHARACTERISTICS (Cont.)2Output Voltage vs. Load CurrentO U T P U T V O L T A G E (V )1–1–12345678LOAD CURRENT (mA)LOAD CURRENT (mA)P O W E R C O N V E R S I O N E F F I C I E N C Y (%)10 20 30 40 50 60 70 80 90100 S U P P L Y C U R R E N T (m A ) (N o t e )102030405060P O W E R C O N V E R S I O N E F F I C I E N C Y (%)LOAD CURRENT (mA)0 2468 1012 14 16 1820S U P PL Y C U R R E N T (m A ) (N o t e )OUTPUT CURRENT (mA)O U T P U T V O L T A G E (V )00Output Voltage vs. Output Current–1–2–3–4–5–6–7–8–9–10102030405060708090100LOAD CURRENT (mA)O U T P U T V O L T A G E (V )Output Voltage vs. Load Current1054320–1–2–3–4–51020304050607080TC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTERFigure 1. TC7660 Test CircuitDetailed DescriptionThe TC7660 contains all the necessary circuitry to implement a voltage inverter, with the exception of two external capacitors, which may be inexpensive 10 µF polar-ized electrolytic capacitors. Operation is best understood by considering Figure 2, which shows an idealized voltage inverter. Capacitor C 1 is charged to a voltage, V +, for the half cycle when switches S 1 and S 3 are closed. (Note: Switches S 2 and S 4 are open during this half cycle.) During the second half cycle of operation, switches S 2 and S 4 are closed, with S 1 and S 3 open, thereby shifting capacitor C 1 negatively by V + volts. Charge is then transferred from C 1 to C 2, such that the voltage on C 2 is exactly V +, assuming ideal switches and no load on C 2.Figure 2. Idealized Charge Pump InverterThe four switches in Figure 2 are MOS power switches;S 1 is a P-channel device, and S 2, S 3 and S 4 are N-channel devices. The main difficulty with this approach is that in integrating the switches, the substrates of S 3 and S 4 must always remain reverse-biased with respect to their sources,but not so much as to degrade their ON resistances. In addition, at circuit start-up, and under output short circuit conditions (V OUT = V +), the output voltage must be sensed and the substrate bias adjusted accordingly. Failure to accomplish this will result in high power losses and probable device latch-up.This problem is eliminated in the TC7660 by a logic network which senses the output voltage (V OUT ) together with the level translators, and switches the substrates of S 3and S 4 to the correct level to maintain necessary reverse bias.The voltage regulator portion of the TC7660 is an integral part of the anti-latch-up circuitry. Its inherent voltage drop can, however, degrade operation at low voltages. To improve low-voltage operation, the LV pin should be connected to GND, disabling the regulator. For supply voltages greater than 3.5V, the LV terminal must be left open to ensure latch-up-proof operation and prevent device damage.Theoretical Power Efficiency ConsiderationsIn theory, a capacitive charge pump can approach 100% efficiency if certain conditions are met:(1)The drive circuitry consumes minimal power.(2)The output switches have extremely low ONresistance and virtually no offset.(3)The impedances of the pump and reservoircapacitors are negligible at the pump frequency.TC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTERThe TC7660 approaches these conditions for negative voltage multiplication if large values of C1 and C2 are used. Energy is lost only in the transfer of charge between capacitors if a change in voltage occurs. The energy lost is defined by:E = 1/2 C1 (V12– V22)V1 and V2 are the voltages on C1 during the pump and transfer cycles. If the impedances of C1 and C2 are relatively high at the pump frequency (refer to Figure 2), compared to the value of R L, there will be a substantial difference in voltages V1 and V2. Therefore, it is not only desirable to make C2 as large as possible to eliminate output voltage ripple, but also to employ a correspondingly large value for C1 in order to achieve maximum efficiency of operation. Dos and Don'ts•Do not exceed maximum supply voltages.•Do not connect LV terminal to GND for supply voltages greater than 3.5V.•Do not short circuit the output to V+ supply for voltages above 5.5V for extended periods; however, transient conditions including start-up are okay.•When using polarized capacitors in the inverting mode,the + terminal of C1 must be connected to pin 2 of the TC7660 and the + terminal of C2 must be connected to GND Pin 3.Simple Negative Voltage ConverterFigure 3 shows typical connections to provide a nega-tive supply where a positive supply is available. A similar scheme may be employed for supply voltages anywhere in the operating range of +1.5V to +10V, keeping in mind that pin 6 (LV) is tied to the supply negative (GND) only for supply voltages below 3.5V.Figure 3. Simple Negative ConverterParalleling DevicesAny number of TC7660 voltage converters may be paralleled to reduce output resistance (Figure 4). The reser-voir capacitor, C2, serves all devices, while each device requires its own pump capacitor, C1. The resultant output resistance would be approximately:R OUT (of TC7660)n (number of devices)R OUT =22πf C1The output characteristics of the circuit in Figure 3 are those of a nearly ideal voltage source in series with 70Ω. Thus, for a load current of –10mA and a supply voltage of +5V, the output voltage would be – 4.3V.The dynamic output impedance of the TC7660 is due, primarily, to capacitive reactance of the charge transfer capacitor (C1). Since this capacitor is connected to the output for only 1/2 of the cycle, the equation is:X C = = 3.18Ω,where f = 10kHz and C1 = 10µF.TC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTERFigure 5. Increased Output Voltage by Cascading DevicesTC7660CHARGE PUMP DC-TO-DCVOLTAGE CONVERTER Figure 6. External ClockingFigure 7. Lowering Oscillator FrequencyPositive Voltage MultiplicationThe TC7660 may be employed to achieve positive voltage multiplication using the circuit shown in Figure 8. In this application, the pump inverter switches of the TC7660 are used to charge C1 to a voltage level of V+– V F (where V+ is the supply voltage and V F is the forward voltage drop of diode D1). On the transfer cycle, the voltage on C1 plus the supply voltage (V+) is applied through diode D2 to capacitor C2. The voltage thus created on C2 becomes (2 V+) – (2 V F), or twice the supply voltage minus the combined forward voltage drops of diodes D1 and D2.The source impedance of the output (V OUT) will depend on the output current, but for V+ = 5V and an output current of 10 mA, it will be approximately 60Ω.Figure 8. Positive Voltage Multiplier Combined Negative Voltage Conversionand Positive Supply MultiplicationFigure 9 combines the functions shown in Figures 3 and 8 to provide negative voltage conversion and positive volt-age multiplication simultaneously. This approach would be, for example, suitable for generating +9V and – 5V from an existing +5V supply. In this instance, capacitors C1 and C3 perform the pump and reservoir functions, respectively, for the generation of the negative voltage, while capacitors C2 and C4 are pump and reservoir, respectively, for the multi-plied positive voltage. There is a penalty in this configuration which combines both functions, however, in that the source impedances of the generated supplies will be somewhat higher due to the finite impedance of the common charge pump driver at pin 2 of the device.Figure 9. Combined Negative Converter and Positive Multiplier Efficient Positive VoltageMultiplication/ConversionSince the switches that allow the charge pumping op-eration are bidirectional, the charge transfer can be per-formed backwards as easily as forwards. Figure 10 shows a TC7660 transforming – 5V to +5V (or +5V to +10V, etc.). The only problem here is that the internal clock and switch-drive section will not operate until some positive voltage has been generated. An initial inefficient pump, as shown in Figure 9, could be used to start this circuit up, after which it will bypass the other (D1 and D2 in Figure 9 would never turn on), or else the diode and resistor shown dotted in Figure 10 can be used to "force" the internal regulator on.TC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTERFigure 11. Splitting a Supply in HalfTC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER11TC7660CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER© 2001 Microchip Technology Inc. DS21465ATC7660-7 9/30/96PACKAGE DIMENSIONS (CONT.)12© 2001 Microchip Technology Inc. DS21465ATC7660-7 9/30/96Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip ís products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, except as maybe explicitly expressed herein, under any intellec-tual property rights. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights reserved. All other trademarks mentioned herein are the property of their respective companies.All rights reserved. © 2001 Microchip Technology Incorporated. 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ICL7660中文资料
ICL中文资料小功率极性反转电源转换器ICL7660ICL7660是Maxim公司生产的小功率极性反转电源转换器。
该集成电路与TC7662ACPA MAX1044的内部电路及引脚功能完全一致，可以直接替换。
（1）特性ICL7660的静态电流典型值为170μA，输入电压范围为1.5-10V，(Intersil公司ICL7660A输入电压范围为1.5-12）工作频率为10 kHz只需外接10 kHz的小体积电容，只需外接10μF的小体积电容效率高达98％合输出功率可达700mW（以DIP 封装为例），符合输出100mA的要求。
(2)内部电路与引脚功能ICL7660提供DIP、SO，μMAX TO-99等封装形式。
.图1 ICL7660引脚图引脚号引脚符号引脚功能1 N.C 空脚2 CAP+ 储能电容正极3 GND 接地4 CAP- 储能电容负极5 VOUT 负电压输出端6 LV 输入低压电压控制端，输入电压低于3.5V时，该脚接地，输入电压高于5V时，该脚必须悬空。
7 OSC 工作时钟输入端8 V+ 电源输入端ICL7660主要应用在需要从十5V逻辑电源产生一5V电源的设备中，如数据采集、手持式仪表（PDA、掌上电脑）、运算放大器电源、便携式电话等。
ICL7660有两种工作模式：转换器、分压器。
‘作为转换器时，该器件可将1.5-10V范围内的输人电压转换为相应的负电压；在分压模式下工作时，它将输入电压一分为二。
ICL7660作为分压器时的应用电路如图7所示。
图2 基本负电压转换器图3 负电压升压转换器和低压连接图4 负电压转换器，增强型图5 电压倍增器图6 ICL7660外部时钟电路图7 ICL7660 分压器【ICL7660工作原理及典型电路介绍】ICL7660 采用DIP-8封装，引脚排列如下图（）所示，CAP+、CAP-分别为外接电容C1的正、负端。
Uo为负压输出端，接电容C2。
LV是低电压端，当UDD﹥3.5V时此端开路，UDD﹤3.5V时接地，以改善低压工作性能。
LM7660中文资料
封装形式 8-Pin DIP 和 8-Pin SOIC 小体积封装
1(11)
引脚说明 引脚号 1
2 3 4 5 6 7 8
符号 NC
CAP+ GND CAPVout Low Voltage OSC
V+
功能块框图
引脚描述 无连接
外接电容+ 接地
外接电容输出
低电压选择 振荡器外接电容
输入电压
ME 7660
负载电流(mA)
4(11)
100 90 80 70 60 50 40 30 20 10 0 5
电源效率vs.负载电流(V+=+5V)
ME 7660
Ver 00
10
15
20
25
30
负载电流(mA)
电源效率(%)
测试电路
5(11)
详细说明
ME 7660
Ver 00
如图 ME7660 与两个的电解电容 C1 C2 一起构成了完负压电路 工作原理如下 在脉冲的前半周期 开关 1 3 闭合时 此时 开关 2 4 断开 电容 C1 被充电至 V+ 在脉冲的后半周期 开关 1 3 断开而 2 4 闭合 于是向 C2 充电 在输出端得到负压 -V+
Ver 00
绝对最大额定值
电源电压 LV 与 OSC 脚输入电压
+10.5V -0.3V (V++0.3V) 当 V+<5.5V 时 (V+-5.5V) (V++0.3V) 当 V+>5.5V 时
LV 脚输入电流
20µA 当 V+>3.5V 时
输出端短路持续时间(电源电压 5.5V)
ICL7660_Datasheet汉语译文
ICL7660_DATASHEETCMOS 电压转换Intersil(英特锡尔)ICL7660或者ICL7660A是单晶体CMOS电源供电电路芯片，相比先前的器件有着独特优势。
………………Features·+5V逻辑供电简易转换至±5V$·简易电压倍增（Vout=（-）nVin）·典型开环电路电压转换效率为%·典型电能转换效率98%·宽操作电压范围-ICL7660. . . . . . . . . . . . . . . . . . to 10V-ICL7660A. . . . . . . . . . . . . . . . . . to 12V·ICL7660 100% 在3V条件下测试的·容易使用——仅需要两个外部非重要的无源元件·没有任何外部二极管超过全温度，和电压范围·无铅并且退火可用(RoHS兼容)《Application·为DRAM板级供电·为本地微型处理器（8080型）供负电·便宜的负电源·数据采集系统Pinouts、Ordering Information（订购需知）Absolute Maximum Ratings（绝对最大参数）供电电压-ICL7660.. .. .. .. .. .. .. .. .. .. .. .. +-ICL7660A.. .. .. .. .. .. .. .. .. .. .. ..+LV 和OSC 输入电压 .. .. to (V+ + for V+ <(Note 2) . . . . . (V+ to (V+ + for V+ >'Current into LV (Note 2) . . . . . . . 20µA for V+ >Output Short Duration (VSUPPLY≤ . . . . . . .ContinuousOperating Conditions（操作条件）温度范围ICL7660C, ICL7660AC. . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C ICL7660AI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C热阻抗 (典型值, Note 1) θJA(°C/W)θJC(°C/W)PDIP Package* . . . . . . . . . . . . . . . . . . 110 N/A^SOIC Package . . . . . . . . . . . . . . . . . . . 160 N/AMaximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C Maximum Lead Temperature (Soldering, 10s). . . . . . . . . . . . . 300°C (SOIC - Lead Tips Only)Electrical Specifications（电气特性）ICL7660 and ICL7660A, V+ = 5V, T A= 25°C, C OSC= 0, Test Circuit Figure 11 Unless Otherwise Specified@Functional Block Diagram（功能模块原理图）图、ICL7660A测试电路：注意：在C osc >1000pF时，C1和C2也相应增加到100UfDetailed Description（细节描述）ICL7660和ICL7660A包含所有必要的电路实现负电压变换器，在外部还需要两个并不贵的10uF的极性电容。
ICL7660SCBAZ中文资料
Features
• Guaranteed Lower Max Supply Current for All Temperature Ranges • Wide Operating Voltage Range 1.5V to 12V • 100% Tested at 3V • No External Diode Over Full Temperature and Voltage Range • Boost Pin (Pin 1) for Higher Switching Frequency • Guaranteed Minimum Power Efficiency of 96% • Improved Minimum Open Circuit Voltage Conversion Efficiency of 99% • Improved SCR Latchup Protection • Simple Conversion of +5V Logic Supply to ±5V Supplies • Simple Voltage Multiplication VOUT = (-)nVIN • Easy to Use - Requires Only 2 External Non-Critical Passive Components • Improved Direct Replacement for Industry Standard ICL7660 and Other Second Source Devices • Pb-Free Plus Anneal Available (RoHS Compliant)
元器件交易网
ICL7660S Ordering Information
PART NUMBER ICL7660SCBA ICL7660SCBA-T ICL7660SCBAZ (Note 1) PART MARKING 7660SCBA 7660SCBA 7660SCBAZ TEMP. RANGE (°C) 0 to 70 0 to 70 PACKAGE PKG. DWG. # 8 Ld SOIC (N) M8.15 8 Ld SOIC (N) M8.15 (Pb-free)
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I+
V+H V L
+
ROUT
fOSC PEFF VOUTEFF ZOSC
— 95 97 — —
Note 1: Destructive latch-up may occur if voltages greater than V + or less than GND are supplied to any input pin.
3 GND
Logic Network
2002 Microchip Technology Inc.
DS21465B-page 1
元器件交易网
TC7660
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage .............................................................+10.5V LV and OSC Inputs Voltage: (Note 1) .............................................. -0.3V to VSS for V+ < 5.5V .....................................(V+ – 5.5V) to (V+) for V+ > 5.5V Current into LV ......................................... 20 µA for V+ > 3.5V Output Short Duration (VSUPPLY ≤ 5.5V)...............Continuous Package Power Dissipation: (TA ≤ 70°C) 8-Pin CERDIP ....................................................800 mW 8-Pin PDIP .........................................................730 mW 8-Pin SOIC .........................................................470 mW Operating Temperature Range: C Suffix.......................................................0°C to +70°C I Suffix .....................................................-25°C to +85°C E Suffix ....................................................-40°C to +85°C M Suffix .................................................-55°C to +125°C Storage Temperature Range.........................-65°C to +160°C ESD protection on all pins (HBM) ................... ..............≥ 3 kV Maximum Junction Temperature ........... ....................... 150°C * Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. IS IL V+ (+5V) RL VOUT C2 + 10 µF
Applications
• • • • RS-232 Negative Power Supply Simple Conversion of +5V to ±5V Supplies Voltage Multiplication VOUT = ± n V+ Negative Supplies for Data Acquisition Systems and Instrumentation
1 C1 + 10 µF 2 3 4 TC7660
8 7 6 5 COSC
FIGURE 1-1:
TC7660 Test Circuit.
ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise noted, specifications measured over operating temperature range with V+ = 5V, COSC = 0, refer to test circuit in Figure 1-1. Parameters Supply Current Supply Voltage Range, High Supply Voltage Range, Low Output Source Resistance Sym Min — 3.0 1.5 — — — — — — Oscillator Frequency Power Efficiency Voltage Conversion Efficiency Oscillator Impedance Typ 80 — — 70 — — 104 150 160 10 98 99.9 1.0 100 Max 180 10 3.5 100 120 130 150 300 600 — — — — — kHz % % MΩ kΩ Units µA V V Ω RL = ∞ Min ≤ TA ≤ Max, R L = 10 kΩ, LV Open Min ≤ TA ≤ Max, R L = 10 kΩ, LV to GND IOUT=20 mA, TA = +25°C IOUT=20 mA, TA ≤ +70°C (C Device) IOUT=20 mA, TA ≤ +85°C (E and I Device) IOUT=20 mA, TA ≤ +125°C (M Device) V + = 2V, IOUT = 3 mA, LV to GND 0°C ≤ TA ≤ +70°C V + = 2V, IOUT = 3 mA, LV to GND -55°C ≤ TA ≤ +125°C (M Device) Pin 7 open RL = 5 k Ω RL = ∞ V+ = 2V V + = 5V Conditions
DS21465B-page 2
2002 Microchip Technology Inc.
元器件交易网
TC7660
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
TC76பைடு நூலகம்0
Package Types
PDIP/CERDIP/SOIC
NC CAP+ GND CAP 1 2 3 4 8 V+ OSC LOW VOLTAGE (LV) VOUT
Charge Pump DC-to-DC Voltage Converter
TC7660
7 6 5
General Description
The TC7660 is a pin-compatible replacement for the industry standard 7660 charge pump voltage converter. It converts a +1.5V to +10V input to a corresponding -1.5V to -10V output using only two low cost capacitors, eliminating inductors and their associated cost, size and electromagnetic interference (EMI). The on-board oscillator operates at a nominal frequency of 10 kHz. Operation below 10 kHz (for lower supply current applications) is possible by connecting an external capacitor from OSC to ground. The TC7660 is available in 8-Pin PDIP, 8-Pin Small Outline (SOIC) and 8-Pin CERDIP packages in commercial and extended temperature ranges.