Texas Instruments LM3524DN

Mfr. Part

LM3524DN

Manufacturer

Luminary Micro/Texas Instruments

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Detailed Description

PWM switching controller for DC-DC converters with transistor driver output. Supports buck and boost topologies (step-down and step-up). Operates from 8 V to 40 V supply. Through-hole 16-PDIP package. Non-synchronous rectification. Designed for single-phase control with adjustable frequency, current limit, and enable functions.

Key Features

Input supply range 8 V to 40 V

Function step-up and step-down (buck and boost)

Output type transistor driver (drives external power devices)

Output configuration positive or negative

Number of outputs 1 and single-phase control

Max duty cycle 49 percent

Control features current limit, enable, frequency control

Synchronous rectifier no

Clock synchronization no

Operating junction temperature 0 to 125 C

Mounting type through hole

Package 16-DIP (0.300 inch, 7.62 mm body width)

Supplier device package 16-PDIP

RoHS status non-compliant

Base product number LM3524

Key Advantages

Wide operating supply voltage for flexible system design

Simple, proven controller architecture for buck and boost converters

Robust through-hole DIP package for easy prototyping and field repair

Adjustable switching frequency via external components for performance tuning

Built-in protection and control (current limit and enable)

Positive or negative output configuration options for diverse power rails

Mature, widely used device with broad industry familiarity

Packaging

Type 16-PDIP through-hole (standard DIP-16 footprint)

Material molded epoxy plastic body with metal leadframe (RoHS non-compliant plating)

Size body width 0.300 inch (7.62 mm), standard DIP-16 outline, 2.54 mm pin pitch

Pin configuration 16-lead DIP with standard LM3524 control pins (Vcc, GND, reference, error amplifier inputs, oscillator RT/CT, soft-start, current sense, enable/shutdown, output driver pins)

Thermal characteristics operating junction temperature 0 to 125 C (TJ)

Electrical properties supply 8 V to 40 V, duty cycle max 49 percent, single-phase, non-synchronous, transistor driver output

Shipment format tube for through-hole assembly handling and storage

Lifecycle

Status mature and commonly available from Texas Instruments. No current indication of imminent discontinuation based on publicly available information.

Equivalent or alternative models

- LM3524N (TI) DIP variant of the same controller family

- LM3524D (TI) SOIC-16 variant of the same controller family

- UC3524, UC2524, UC1524 (TI Unitrode) similar PWM controller family, largely pin-compatible in many packages and temp grades

- SG3524 (multisourced by ON Semiconductor and others) functionally similar and often pin-compatible

- KA3524 (Fairchild/ON) clone of SG3524, similar functionality

- TL494 (TI) widely used PWM controller with similar features (not pin-compatible; check design differences)

- Modern alternatives for buck/boost control (not pin-compatible) include LM3478, LM5116, and related TI controllers depending on power level and topology

If you need exact pin-for-pin replacements or guidance on best-fit modern alternatives, please contact our sales team via the Y-IC website for detailed support

Key Application Areas

Industrial and telecom DC power supplies (buck and boost)

Battery-powered systems and chargers

Automotive auxiliary rails and in-vehicle converters

LED drivers using non-synchronous control

Forward, flyback, and push-pull converter controllers (with external power stages)

General-purpose lab and field power modules, inverter support supplies

Datasheet

Y-IC provides the most authoritative and up-to-date datasheet for LM3524DN on our product page. We recommend downloading it now to get complete electrical specs, pin functions, design equations, and application notes.

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