LM43602-Q1

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Automotive Qualified 3.5V to 36V, 2A 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) 2 Regulated outputs (#) 1 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 Control mode Current Mode Duty cycle (Max) (%) 99 Type Converter Operating temperature range (C) -40 to 125 Rating Automotive 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 2: –40°C to +125°C Ambient Operating Temperature
  • 27-µA Quiescent Current in Regulation
  • High Efficiency at Light Load (DCM and PFM)
  • Meets 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 a 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 LM43602-Q1 With the WEBENCH® Power Designer

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Description

The LM43602-Q1 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 2 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V abs maximum). The LM43602-Q1 provides exceptional efficiency, output accuracy and dropout voltage in a very small solution size. An extended family is available in 0.5-A , 1-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 LM43602-Q1 device is available in the HTSSOP (PWP) 16-pin leaded package (6.6 mm × 5.1 mm × 1.2 mm).The LM43602A-Q1 version is optimized for PFM operation and recommended for new designs. The device is pin-to-pin compatible with LM4360x and LM4600x family.

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Technical documentation

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Type Title Date
* Datasheet LM43602-Q1 3.5-V to 36-V, 2-A Synchronous Step-Down Voltage Converter datasheet (Rev. C) Oct. 18, 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
Technical articles How LDOs meet power requirements for automobile camera modules Jan. 14, 2016
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
Application notes Automotive Line Transient Protection Circuit Jul. 01, 2014
Application notes AN-1197 Selecting Inductors for Buck Converters (Rev. B) Apr. 23, 2013

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 Texas Instruments LM43602EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LM43602 Wide-Vin Simple Switcher ® 2A Buck Regulator. The device offers configurability in output voltage (1.0V to 28V), synchronous rectification and adjustable frequency range (...)

Features
  • 2A output current
  • Input voltage range 3.5V to 36V
  • 30 µA quiescent current switching
  • Synchronous rectification
  • Adjustable frequency range of 200kHz-2.2MHz (500kHz default)
  • Internal compensation

Design tools & simulation

SIMULATION MODELS Download
SNVM577.ZIP (84 KB) - PSpice Model
SIMULATION MODELS Download
SNVM584B.ZIP (283 KB) - PSpice Model
SIMULATION MODELS Download
SNVM607.ZIP (51 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVM608.TSC (86 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM688.ZIP (9 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNVM689.TSC (125 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNVM722B.ZIP (7 KB) - PSpice Model
SIMULATION MODELS Download
SNVM723.ZIP (1 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Reference design for automotive cluster driver notification functions
TIDA-01628 — This reference design implements power and driver notification functions typically found in an automotive instrument cluster. The design features reverse battery protection, a pre-boost stage to support cold-crank battery voltage conditions down to 3.5 volts, buck regulators for 3.3-V and 5-V (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Power Management Solution for Automotive CMOS Imager and Data Serializer Reference Design
TIDA-00535 The TIDA-00535 reference design provides a power management solution for automotive imaging system using the voltage regulators LP5907-Q1, LP5907 and LM436002-Q1 to provide low noise  voltage rails of 1.5V , 1.8 V and 3.3 V to CMOS high dynamic range camera, DS90UB913A-Q1 FPD-Link Serializer (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

Support & training

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