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reference designTPS43350-Q1

Texas Instruments TPS43350-Q1

LOW IQ, DUAL SYNCHRONOUS BUCK CONTROLLER

Overview

TopologyBuck Converter
Input voltage4-40 V
Switching frequency150-600 kHz
Output 13.3 V / 4 A
IC revisionD

Description

The TPS43350-Q1 and TPS43351-Q1 include two current-mode synchronous buck controllers designed for the harsh environment in automotive applications. The devices are ideal for use in a multi-rail system with lowquiescent requirements, as they automatically operate in low-power mode (consuming only 30 µA) at light loads. The devices offer protection features such as thermal, soft-start, and overcurrent protection. During short-circuitconditions of the regulator output, activation of the current-foldback feature can limit the current through the MOSFETs for control of power dissipation. The two independent soft-start inputs allow ramp-up of the output voltage independently during start-up.The programmable range of the switching frequency is from 150 kHz to 600 kHz, as is the frequency of an external clock to which the devices can synchronize. Additionally, the TPS43351-Q1 offers frequency-hoppingspread-spectrum operation.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Test Guidance With the Following Results:
  • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature
  • Device HBM ESD Classification Level H2 – Device HBM CDM Classification Level C2
  • Two Synchronous Buck Controllers
  • Input Range up to 40 V, (Transients up to 60 V)
  • Low-Power Mode IQ: 30 µA (One Buck On),35 µA (Two Bucks On)
  • Low Shutdown Current Ish < 4 µA
  • Buck Output Range 0.9 V to 11 V
  • Programmable Frequency and External Synchronization Range 150 kHz to 600 kHz
  • Separate Enable Inputs (ENA, ENB)
  • Frequency Spread Spectrum (TPS43351-Q1)
  • Selectable Forced Continuous Mode or Automatic Low-Power Mode at Light Loads
  • Sense Resistor or Inductor DCR Sensing
  • Out-of-Phase Switching Between Buck Channels
  • Peak Gate Drive Current 1.5 A
  • Thermally Enhanced, 38-Pin HTSSOP (DAP) PowerPAD™ Package

Typical applications

  • Electronic Control Units
  • Automotive Multi-Rail DC Power Distribution Systems
  • Industlial Multi-Rail DC Power Distribution Systems
  • Automotive Infotainment
  • Navigation

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
ISAT,10%(A)
ISAT,30%(A)
IR,40K(A)
IRP,40K(A)
RDC max.(mΩ)
fres(MHz)
Size
Version
SamplesAvailability & Sample
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74477004
SPECWE-PD SMT Power Inductor, 4.7 µH, 11 A

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance4.7 µH
Saturation Current @ 10%11 A
Saturation Current @ 30%14.3 A
Rated Current9.5 A
Performance Rated Current11 A
DC Resistance12 mΩ
Self Resonant Frequency31.2 MHz
Size1280 
VersionStandard 
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