LM43600-Q1

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Automotive Qualified 3.5V to 36V 0.5A Synchronous Step-Down Voltage Converter

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Product details

Parameters

Vin (Min) (V) 3.5 Vin (Max) (V) 36 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 0.5 Iq (Typ) (mA) 0.033 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new Find other Buck converters (integrated switch)

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • 33-µA Quiescent Current in Regulation
  • High Efficiency at Light Load (DCM and PFM)
  • Tested to EN55022/CISPR 22 EMI standards
  • Integrated Synchronous Rectification
  • Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz Default)
  • Frequency Synchronization to External Clock
  • Internal Compensation
  • Stable with Almost Any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
  • Power-Good Flag
  • Soft Start into Pre-Biased Load
  • Internal Soft Start: 4.1 ms
  • Extendable Soft-Start Time by External Capacitor
  • Output Voltage Tracking Capability
  • Precision Enable to Program System UVLO
  • Output Short-Circuit Protection with Hiccup Mode
  • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM43600-Q1 With the WEBENCH® Power Designer

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Description

The LM43600-Q1 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 0.5 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V transient). The LM43600-Q1 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size. An extended family is available in 1 A, 2 A, and 3 A load current options in pin-to-pin compatible packages. Peak current mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft start, extendable soft start, and tracking provide a flexible and easy to use platform for a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The family requires few external components and pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limit, and output short-circuit protection. The LM43600-Q1 device is available in the 16-pin, leaded HTSSOP (PWP) package (6.6 mm × 5.1 mm × 1.2 mm) with 0.65-mm lead pitch. The device is pin-to-pin compatible with the LM4360x and LM4600x families. The LM43600A-Q1 version is optimized for PFM operation and recommended for new designs.

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Technical documentation

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Type Title Date
* Datasheet LM43600-Q1 3.5-V to 36-V, 0.5-A Synchronous Step-Down Voltage Converter datasheet (Rev. C) Nov. 16, 2017
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Differences Between LM4600x/LM4360x A and Non-A OPNs Mar. 27, 2018
Application notes Inverting Applications Made SIMPLE With LM4600x and LM4360x (Rev. B) Feb. 20, 2015
Application notes Thermal Design Made Simple With LM43603 and LM46002 Sep. 15, 2014
Application notes Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) Sep. 12, 2014
Application notes Compensation Made SIMPLE With LM4360x, LM4600x Jul. 29, 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$29.00
Description

The LM43600PWPEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM43600PWP synchronous step-down converter. The EVM operates from an 3.5V to 36V input and provides a 3.3V output at 0.5A.

Features
  • High efficiency at light load
  • Synchronous rectification
  • Internal compensation
  • Frequency synchronization

Design tools & simulation

SIMULATION MODELS Download
SLIM323A.ZIP (215 KB) - PSpice Model
SIMULATION MODELS Download
SLIM324.ZIP (77 KB) - PSpice Model
SIMULATION MODELS Download
SNVM718.ZIP (1 KB) - PSpice Model
SIMULATION MODELS Download
SNVM719A.ZIP (8 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

Support & training

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