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TC1121CPA

更新时间: 2024-11-21 22:39:47
品牌 Logo 应用领域
美国微芯 - MICROCHIP 转换器光电二极管
页数 文件大小 规格书
14页 444K
描述
100mA Charge Pump Voltage Converter with Shutdown

TC1121CPA 数据手册

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TC1121  
M
100mA Charge Pump Voltage Converter with Shutdown  
Features  
Package Type  
• Optional High-Frequency Operation Allows Use of  
Small Capacitors  
8-Pin PDIP  
• Low Operating Current (FC = GND)  
- 50µA  
• High Output Current (100mA)  
+
FC  
CAP+  
GND  
1
2
3
4
8
7
6
5
V
OSC  
TC1121CPA  
TC1121EPA  
• Converts a 2.4V to 5.5V Input Voltage to a  
Corresponding Negative Output Voltage  
(Inverter Mode)  
SHDN  
CAP–  
OUT  
V
• Uses Only 2 Capacitors; No Inductors Required  
• Selectable Oscillator Frequency  
- 10kHz to 200kHz  
8-Pin SOIC  
8-Pin MSOP  
• Power-Saving Shutdown Input  
• Available in 8-Pin MSOP, 8-Pin PDIP and 8-Pin  
Small Outline (SOIC) Packages  
+
FC  
CAP+  
GND  
1
2
3
4
8
7
6
5
V
TC1121COA  
TC1121EOA  
TC1121CUA  
TC1121EUA  
OSC  
Applications  
SHDN  
• Laptop Computers  
• Medical Instruments  
• Disk Drives  
CAP–  
OUT  
V
µP-Based Controllers  
• Process Instrumentation  
General Description  
The TC1121 is a charge pump converter with 100mA  
output current capability. It converts a 2.4V to 5.5V  
input to a corresponding negative output voltage. As  
with all charge pump converters, the TC1121 uses no  
inductors saving cost, size and EMI.  
Device Selection Table  
Operating  
Part  
Package  
Temp.  
Range  
Number  
An on-board oscillator operates at a typical frequency  
of 10kHz (at V+ = 5V) when the frequency control input  
(FC) is connected to ground. The oscillator frequency  
increases to 200kHz when FC is connected to V+,  
allowing the use of smaller capacitors. Operation at  
sub-10kHz frequencies results in lower quiescent  
NScurrent and is accomplished with the addition of an  
external capacitor from OSC (pin 7) to ground. The  
TC1121 also can be driven from an external clock  
NSconnected OSC. Typical supply current at 10kHz is  
50µA, and falls to less than 1µA when the shutdown  
input is brought low, whether the internal or an external  
clock is used. The TC1121 is available in 8-pin SOIC,  
MSOP and PDIP packages.  
TC1121COA  
TC1121CPA  
TC1121CUA  
TC1121EOA  
TC1121EPA  
TC1121EUA  
8-Pin SOIC  
8-Pin PDIP  
8-Pin MSOP  
8-Pin SOIC  
8-Pin PDIP  
8-Pin MSOP  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
2002 Microchip Technology Inc.  
DS21358B-page 1  

TC1121CPA 替代型号

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