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參數資料
| 型號： | TC1237EUN |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Inverting Dual (-VIN, -2VIN) Charge Pump Voltage Converters with Shutdown |
| 中文描述： | 反相雙（- VIN，這- 2VIN）電荷泵電壓轉換器，帶有關斷 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 1046K |
| 代理商： | TC1237EUN |
TC1235
TC1236
TC1237
TC1235/6/7-1 3/24/00
2001 Microchip Technology Inc. DS21371A
Inverting Dual (–V
IN
, –2V
IN
) Charge Pump Voltage Converters with Shutdown
FEATURES
I
I
I
I
I
Power-Saving Shutdown Mode
I
–V
IN
and –2V
IN
Outputs Available
I
Low Active Supply Current
.......................................... 120
μ
A (MAX) for TC1235
.......................................... 360
μ
A (MAX) for TC1236
.......................................... 1.5mA (MAX) for TC1237
I
Fully Compatible with 1.8V Logic Systems
10-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
TYPICAL APPLICATIONS
I
I
I
I
I
LCD Panel Bias
Cellular Phones PA Bias
Pagers
PDAs, Portable Dataloggers
Battery Powered Devices
GENERAL DESCRIPTION
The TC1235/1236/1237 are CMOS dual inverting
charge pump voltage converters with a low power shutdown
mode in MSOP 10-Pin packages. Only four external capaci-
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 1
μ
A of
supply current.
These devices provide both a negative voltage inver-
sion (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
TC1235EUN
TC1236EUN
TC1237EUN
10-Pin MSOP
10-Pin MSOP
10-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+
SHDN
V
IN
–
V
IN
C1
–
C2
C2
–
C1
TC1235
TC1236
TC1237
C
OUT1
ON
OFF
NC
–
2 V
IN
+
+
+
C
OUT2
+
OUTPUT 1
OUTPUT 2
INPUT
GND
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
GND
10-Pin MSOP
TC1235
TC1236
TC1237
–
2 V
IN
1
2
3
4
5
10
9
8
7
6
C1
–
C2
–
C1+
C2+
NC
–
V
IN
SHDN
V
IN
PIN CONFIGURATION
相關PDF資料 |
PDF描述 |
|---|---|
| TC1235 | Inverting Dual (-VIN, -2VIN) Charge Pump Voltage Converters with Shutdown |
| TC1236 | Inverting Dual (-VIN, -2VIN) Charge Pump Voltage Converters with Shutdown |
| TC1237 | Inverting Dual (-VIN, -2VIN) Charge Pump Voltage Converters with Shutdown |
| TC1240ECHTR | Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package |
| TC1240A | Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package |
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