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參數資料
| 型號： | TC1227EUA |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Inverting Dual (-VIN, -2VIN) Charge Pump Voltage Converters |
| 中文描述： | 反相雙（- VIN，這- 2VIN）電荷泵電壓轉換器 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 1194K |
| 代理商： | TC1227EUA |
TC1225/6/7-1 3/24/00
TC1225
TC1226
TC1227
2001 Microchip Technology Inc. DS21369A
Inverting Dual (–V
IN
, –2V
IN
) Charge Pump Voltage Converters
FEATURES
I
I
I
I
I
I
Small 8-Pin MSOP Package
Operates from 1.8V to 5.5V
Up to 5mA Output Current at –V
IN
Pin
Up to 1mA Output Current at –2V
IN
Pin
–V
IN
and –2V
IN
Outputs Available
Low Supply Current
.......................................... 120
μ
A (MAX) for TC1225
.......................................... 360
μ
A (MAX) for TC1226
.......................................... 1.5mA (MAX) for TC1227
TYPICAL APPLICATIONS
I
I
I
I
I
LCD Panel Bias
Cellular Phones PA Bias
Pagers
PDAs, Portable Data loggers
Battery Powered Devices
GENERAL DESCRIPTION
The TC1225/1226/1227 are CMOS dual inverting charge
pump voltage converters in 8-Pin MSOP packages. An on-
board oscillator provides the clock, and only four external
capacitors are required for full circuit implementation. Switch-
ing frequencies are 12kHz for the TC1225, 35kHz for the
TC1226, and 125kHz for the TC1227.
These devices provide both a negative voltage inversion
(available at the –V
IN
output) and a negative doubling
voltage inversion (available at the –2 V
IN
output), with a low
output impedance capable of providing output currents up to
5mA for the –V
IN
output and 1mA for the –2V
IN
output. The
input voltage can range from +1.8V to +5.5V.
ORDERING INFORMATION
Part No.
Package Osc Freq (kHz) Temp Range
TC1225EUA
TC1226EUA
TC1227EUA
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
12
35
125
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
TYPICAL OPERATING CIRCUIT
C1+
C2+
V
IN
–
V
IN
C1
–
C2
C2
–
C1
TC1225
TC1226
TC1227
C
OUT1
–
2 V
IN
+
+
+
–
+
–
C
OUT2
OUTPUT 1
OUTPUT 2
INPUT
GND
PIN CONFIGURATION
1
2
3
4
8
7
6
5
TC1225
TC1226
TC1227
–
2V
IN
–
V
IN
V
IN
C2
–
GND
C1
–
C1+
C2+
8-Pin MSOP
Notes:
1) C1 and C
OUT1
must have a voltage rating greater
than or equal to V
IN
2) C2 and C
OUT2
must have a voltage rating greater
than or equal to 2V
IN
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