LINEAR TECHNOLOGY - 1 LTC1754-3.3 LTC1754-5 Micropower, Regulated 3.3V 5V Charge Pump with Shutdown in SOT-23 User Manual and Data Sheet
Summary
This micropower charge pump DC/DC converter efficiently steps up input voltage to a regulated 3.3V or 5V output, making it ideal for compact, battery-powered designs. Featuring an ultralow operating and shutdown current (<1mA), the LTC1754 ensures maximum battery life while providing reliable regulation from low voltage inputs (2V–4.4V). The manual provides detailed information on its burst mode operation, ultra-small application circuit, short-circuit protection, and various applications, including GSM phone supplies and simple logic power sources.
Page 1 Text Content
LTC1754-3.3/LTC1754-5 Micropower, Regulated 3.3V/5V Charge Pump with Shutdown in SOT-23
FEATURES DESCRIPTIO Ultralow Power: IIN = 13µA The LTC®1754 is a micropower charge pump DC/DC Regulated Output Voltage: 3.3V ±4%, 5V ±4% converter that produces a regulated output. The input 5V Output Current: 50m A (VIN ≥ 3.0V) voltage range is 2V to 4.4V for 3.3V output and 2.7V to
3.3V Output Current: 40m A (VIN ≥ 2.5V) OU TP UT OL TA GE (V 5.5V for 5V output. Extremely low operating current and a No Inductors Needed low external parts count (one flying capacitor and two Very Low Shutdown Current: <1µA small bypass capacitors at VIN and VOUT) make the LTC1754
Shutdown Disconnects Load from VIN ideally suited for small, battery-powered applications. The Internal Oscillator: 600k Hz total component area of the application circuit shown Short-Circuit and Overtemperature Protected below is only 0.052 inch2. Ultrasmall Application Circuit: (0.052 Inch2)
The LTC1754 operates as a Burst Mode TM switched capaci-
6-Pin SOT-23 Package
tor voltage doubler to produce a regulated output. It has thermal shutdown capability and can survive a continuous APPLICATIO S short circuit from VOUT to GND. 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
OU TP UT OL TA GE (V Burst Mode is a trademark of Linear Technology Corporation.
Li-Ion Battery Backup Supplies Handheld Computers Smart Card Readers PCMCIA Local 5V Supplies
TYPICAL APPLICATIO
LTC1754-3.3 LTC1754-5
Output Voltage vs Supply Voltage1 Output Voltage vs Supply Voltage
VOUT VOUT C+
LTC1754-X
IOUT = 20m A IOUT = 25m A
GND VIN VIN COUT = 10µf
COUT = 10µF
CFLY = 1µF 5.10 CFLY = 1µF
ON/OFF SHDN C–
1754 TA01
TA = 85°C 5.05
TA = 25°C TA = 85°C
Regulated 3.3V Output from 2V to 4.4V Input 3.30
TA = 25°C 5.00
VOUT = 3.3V ±4%
TA = –40°C TA = –40°C
IOUT = 0m A TO 20m A, VIN > 2.0V
IOUT = 0m A TO 40m A, VIN > 2.5V
Regulated 5V Output from 2.7V to 5.5V Input 4.90
VOUT = 5V ±4% IOUT = 0m A TO 25m A, VIN > 2.7V 3.20 4.85
IOUT = 0m A TO 50m A, VIN > 3.0V 2.0 2.5 3.0 3.5 4.0 4.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V)
1754 TA02 1574 TA03
Page Summary Contents For LINEAR TECHNOLOGY - 1 LTC1754-3.3 LTC1754-5 Micropower, Regulated 3.3V 5V Charge Pump with Shutdown in SOT-23 User Manual and Data Sheet
Manual Details
| Brand | Linear |
|---|---|
| Pages | 12 |
| File Size | 205.96 KB |
| Published | July 16, 2026 |
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Frequently Asked Questions
What type of applications is the LTC1754 ideal for?
It is ideally suited for small, battery-powered applications like GPSM cellular telephones or bio-medical devices.
Does the chip require external inductors?
No, it is a charge pump that does not require any inductors, simplifying the application circuit.
What are the operational protections included?
It features short-circuit protection, overtemperature protection, and thermal shutdown capabilities for reliability.
How low is the consumption when the device is shut down?
The very low shutdown current is less than 1mA (<1mA).
What is the specified operating temperature range?
The operational temperature range is from –40°C to 85°C.