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LTC1754-3.3 PDF预览

LTC1754-3.3

更新时间： 2024-02-28 06:04:57
品牌 Logo 应用领域
凌特 - Linear 泵
页数 文件大小 规格书
12页 204K
描述
Micropower, Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23

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LTC1754-3.3 数据手册

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LTC1754-3.3/LTC1754-5  
Micropower, Regulated  
3.3V/5V Charge Pump with  
Shutdown in SOT-23  
U
FEATURES  
DESCRIPTIO  
■
Ultralow Power: IIN = 13  
µA  
The LTC®1754 is a micropower charge pump DC/DC  
converter that produces a regulated output. The input  
voltage range is 2V to 4.4V for 3.3V output and 2.7V to  
5.5V for 5V output. Extremely low operating current and a  
low external parts count (one flying capacitor and two  
smallbypasscapacitorsatVINandVOUT)maketheLTC1754  
ideally suited for small, battery-powered applications. The  
total component area of the application circuit shown  
below is only 0.052 inch2.  
TheLTC1754operatesasaBurstModeTM switchedcapaci-  
tor voltage doubler to produce a regulated output. It has  
thermalshutdowncapabilityandcansurviveacontinuous  
short circuit from VOUT to GND.  
■
Regulated Output Voltage: 3.3V  
±
4%, 5V  
3.0V)  
2.5V)  
±4%  
■
■
■
■
■
■
■
■
■
5V Output Current: 50mA (VIN  
≥
3.3V Output Current: 40mA (VIN  
≥
No Inductors Needed  
Very Low Shutdown Current: <1µA  
Shutdown Disconnects Load from VIN  
Internal Oscillator: 600kHz  
Short-Circuit and Overtemperature Protected  
Ultrasmall Application Circuit: (0.052 Inch2)  
6-Pin SOT-23 Package  
U
APPLICATIO S  
The LTC1754 is available in a 6-pin SOT-23 package.  
■
SIM Interface Supplies for GSM Cellular Telephones  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
■
White LED Power Supplies  
Burst Mode is a trademark of Linear Technology Corporation.  
■
Li-Ion Battery Backup Supplies  
■
Handheld Computers  
Smart Card Readers  
PCMCIA Local 5V Supplies  
■
■
U
TYPICAL APPLICATIO  
LTC1754-3.3  
Output Voltage vs Supply Voltage  
LTC1754-5  
Output Voltage vs Supply Voltage  
1
2
3
6
5
4
+
V
OUT  
V
C
OUT  
LTC1754-X  
3.40  
3.35  
3.30  
3.25  
3.20  
5.15  
5.10  
5.05  
5.00  
4.95  
4.90  
4.85  
1µF  
10µF  
I
C
C
= 20mA  
= 10µf  
= 1µF  
OUT  
OUT  
FLY  
I
C
C
= 25mA  
= 10µF  
= 1µF  
OUT  
OUT  
FLY  
V
GND  
V
IN  
IN  
10µF  
–
ON/OFF  
SHDN  
C
1754 TA01  
T
= 85°C  
= 25°C  
A
A
T
A
= 85°C  
T
= 25°C  
A
Regulated 3.3V Output from 2V to 4.4V Input  
T
V
= 3.3V ±4%  
OUT  
T
= –40°C  
T
A
= –40°C  
A
I
I
= 0mA TO 20mA, V > 2.0V  
IN  
= 0mA TO 40mA, V > 2.5V  
OUT  
OUT  
IN  
Regulated 5V Output from 2.7V to 5.5V Input  
V
= 5V ±4%  
OUT  
I
I
= 0mA TO 25mA, V > 2.7V  
IN  
= 0mA TO 50mA, V > 3.0V  
IN  
OUT  
OUT  
2.0  
2.5  
3.0  
3.5  
4.0  
4.5  
2.5  
3.5  
4.0  
4.5  
5.0  
5.5  
3.0  
SUPPLY VOLTAGE (V)  
SUPPLY VOLTAGE (V)  
1754 TA02  
1574 TA03  
1
1234567...12

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