LTC1751

PRODUCTION

Micropower, Regulated Charge Pump DC/DC Converters

Part Models: 6
1ku List Price: Starting From $2.85

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Overview

5V Output Current: 100mA (V_IN ≥ 3V)
3.3V Output Current: 80mA (V_IN ≥ 2.5V)
Ultralow Power: 20µA Quiescent Current
Regulated Output Voltage: 3.3V ±4%, 5V ±4%, ADJ
V_IN Range: 2V to 5.5V
800kHz Switching Frequency
No Inductors
Very Low Shutdown Current: <2µA
Shutdown Disconnects Load from V_IN
PowerGood/Undervoltage Output
Adjustable Soft-Start Time
Short-Circuit/Thermal Protection
Available in 8-Pin MSOP

The LTC1751 family are micropower charge pump DC/DC converters that produce a regulated output voltage at up to 100mA. The input voltage range is 2V to 5.5V. Extremely low operating current (20µA typical with no load) and low external parts count (one flying capacitor and two small bypass capacitors at V_IN and V_OUT) make them ideally suited for small, battery-powered applications.

The LTC1751 family operate as Burst Mode^™ switched capacitor voltage doublers to achieve ultralow quiescent current. They have thermal shutdown capability and can survive a continuous short circuit from V_out to GND. The PGOOD pin on the LTC1751-3.3 and LTC1751-5 indicates when the output voltage has reached its final value and if the output has an undervoltage fault condition. The FB pin of the adjustable LTC1751 can be used to program the desired output voltage or current. An optional soft-start capacitor may be used at the SS pin to prevent excessive inrush current during start-up.

The LTC1751 family is available in an 8-pin MSOP package.

Applications

Li-Ion Battery Backup Supplies
Local 3V and 5V Conversion
Smart Card Readers
PCMCIA Local 5V Supplies
White LED Backlighting

Part Models: 6
1ku List Price: Starting From $2.85

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC1751EMS8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1751EMS8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1751EMS8-3.3#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1751EMS8-3.3#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1751EMS8-5#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1751EMS8-5#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
		PCN24_0004_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1751EMS8#PBF	PRODUCTION
LTC1751EMS8#TRPBF	PRODUCTION
LTC1751EMS8-3.3#PBF	PRODUCTION
LTC1751EMS8-3.3#TRPBF	PRODUCTION
LTC1751EMS8-5#PBF	PRODUCTION
LTC1751EMS8-5#TRPBF	PRODUCTION
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0128_Form Material_Report
LTC1751EMS8#PBF	PRODUCTION
LTC1751EMS8#TRPBF	PRODUCTION
LTC1751EMS8-3.3#PBF	PRODUCTION
LTC1751EMS8-3.3#TRPBF	PRODUCTION
LTC1751EMS8-5#PBF	PRODUCTION
LTC1751EMS8-5#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC1751
LTC1751-3.3
LTC1751-5

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.