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TC1235EUNTR

更新时间: 2024-11-26 13:14:23
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美国微芯 - MICROCHIP 转换器
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TC1235EUNTR 数据手册

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TC1235  
TC1236  
TC1237  
Inverting Dual (–VIN, –2VIN) Charge Pump Voltage Converters with Shutdown  
FEATURES  
GENERAL DESCRIPTION  
10-Pin MSOP Package  
Operates from 1.8V to 5.5V  
The TC1235/1236/1237 are CMOS dual inverting  
chargepumpvoltageconverterswithalowpowershutdown  
modeinMSOP10-Pinpackages. Onlyfourexternalcapaci-  
tors are required for full circuit implementation. Switching  
frequencies are 12kHz for the TC1235, 35kHz for the  
TC1236 and 125kHz for the TC1237. When the shutdown  
pin is held at a logic low, the device goes into a very low  
power mode of operation, consuming less than 1µA of  
supply current.  
These devices provide both a negative voltage inver-  
sion (available at the –VIN output), and a negative doubling  
voltage inversion (available at the –2 VIN output) with a low  
outputimpedancecapableofprovidingoutputcurrentsupto  
5mA for the –VIN output and 1mA for the –2VIN output. The  
input voltage can range from +1.8V to +5.5V.  
Up to 5mA Output Current at –VIN Pin  
Up to 1mA Output Current at –2VIN Pin  
Power-Saving Shutdown Mode  
–VIN and –2VIN Outputs Available  
Low Active Supply Current  
.......................................... 120µA (MAX) for TC1235  
.......................................... 360µA (MAX) for TC1236  
.......................................... 1.5mA (MAX) for TC1237  
Fully Compatible with 1.8V Logic Systems  
TYPICAL APPLICATIONS  
LCD Panel Bias  
Cellular Phones PA Bias  
Pagers  
ORDERING INFORMATION  
PDAs, Portable Dataloggers  
Battery Powered Devices  
Part No.  
Package Osc Freq (KHz) Temp Range  
TC1235EUN 10-Pin MSOP  
TC1236EUN 10-Pin MSOP  
TC1237EUN 10-Pin MSOP  
12  
35  
–40°C to +85°C  
–40°C to +85°C  
–40°C to +85°C  
125  
PIN CONFIGURATION  
TYPICAL OPERATING CIRCUIT  
10-Pin MSOP  
INPUT  
C1+  
V
+
IN  
C1  
OUTPUT 1  
C1–  
VIN  
V  
10  
9
1
2
C1–  
IN  
C
OUT1  
C2+  
+
+
C2+  
C1+  
TC1235  
TC1236  
TC1237  
ON  
C2  
C2–  
SHDN  
2 V  
OFF  
TC1235  
TC1236  
TC1237  
3
4
8
7
NC  
C2–  
SHDN  
VIN  
GND  
NC  
OUTPUT 2  
IN  
C
OUT2  
+
2 VIN  
5
6
GND  
Notes: 1) C1 and COUT1 must have a voltage rating greater  
than or equal to VIN  
2) C2 and COUT2 must have a voltage rating greater  
than or equal to 2VIN  
© 2001 Microchip Technology Inc. DS21371A  
TC1235/6/7-1 3/24/00  

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