LT1507

PRODUCTION

500kHz Monolithic Buck Mode Switching Regulator

Part Models: 12
1ku List Price: Starting From $4.31

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Overview

Constant 500kHz Switching Frequency
Uses All Surface Mount Components
Operates with Inputs as Low as 4V
Saturated Switch Design (0.3Ω)
Cycle-by-Cycle Current Limiting
Easily Synchronizable
Inductor Size as Low as 2µH
Shutdown Current: 20µA

The LT1507 is a 500kHz monolithic buck mode switching regulator, functionally identical to the LT1375 but optimized for lower input voltage applications. It will operate over a 4V to 15V input range, compared with 5.5V to 25V for the LT1375. A 1.5A switch is included on the die along with all the necessary oscillator, control and logic circuitry. High switching frequency allows a considerable reduction in the size of external components. The topology is current mode for fast transient response and good loop stability. Both fixed output voltage (3.3V) and adjustable parts are available.

A special high speed bipolar process and new design techniques allow this regulator to achieve high efficiency at a high switching frequency. Efficiency is maintained over a wide output current range by keeping quiescent supply current to 4mA and by utilizing a supply boost capacitor to allow the NPN power switch to saturate. A shutdown signal will reduce supply current to 20µA.

The LT1507 can be externally synchronized from 570kHz to 1MHz with logic level inputs.The LT1507 fits into standard 8-pin SO and PDIP packages. Temperature rise is kept to a minimum by the high efficiency design. Full cycle-by-cycle short-circuit protection and thermal shutdown are provided. Standard surface mount external parts are used including the inductor and capacitors.

Applications

Portable Computers
Battery-Powered Systems
Battery Charger
Distributed Power

Part Models: 12
1ku List Price: Starting From $4.31

Documentation

Data Sheet 1

LT1507: 500kHz Monolithic Buck Mode Switching Regulator Data Sheet 08/29/2007

Reliability Data 1

R386 Reliability Data 03/22/2018

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
LT1507CN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507CN8-3.3#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507CS8-3.3#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507CS8-3.3#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507IN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507IN8-3.3#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507IS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507IS8-3.3#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1507IS8-3.3#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package
		PCN24_0234_Form Material_Report Marking Comparison
LT1507CN8#PBF	PRODUCTION
LT1507CN8-3.3#PBF	PRODUCTION
LT1507IN8#PBF	PRODUCTION
LT1507IN8-3.3#PBF	PRODUCTION
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package
		PCN22_0241_Form Material_Report Qualification Results Summary
LT1507CN8#PBF	PRODUCTION
LT1507CN8-3.3#PBF	PRODUCTION
LT1507IN8#PBF	PRODUCTION
LT1507IN8-3.3#PBF	PRODUCTION
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]
		PCN22_0172_Form Material_Report Delta Qualification Matrix
LT1507CN8#PBF	PRODUCTION
LT1507CN8-3.3#PBF	PRODUCTION
LT1507IN8#PBF	PRODUCTION
LT1507IN8-3.3#PBF	PRODUCTION
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1507CS8#PBF	PRODUCTION
LT1507CS8#TRPBF	PRODUCTION
LT1507CS8-3.3#PBF	PRODUCTION
LT1507CS8-3.3#TRPBF	PRODUCTION
LT1507IS8#PBF	PRODUCTION
LT1507IS8#TRPBF	PRODUCTION
LT1507IS8-3.3#PBF	PRODUCTION
LT1507IS8-3.3#TRPBF	PRODUCTION
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0060_Form Material_Report Delta Qualification Matrix
LT1507CS8#PBF	PRODUCTION
LT1507CS8#TRPBF	PRODUCTION
LT1507CS8-3.3#PBF	PRODUCTION
LT1507CS8-3.3#TRPBF	PRODUCTION
LT1507IS8#PBF	PRODUCTION
LT1507IS8#TRPBF	PRODUCTION
LT1507IS8-3.3#PBF	PRODUCTION
LT1507IS8-3.3#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:

LT1507
LT1507-3.3

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.