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reference designTPS54424

Texas Instruments TPS54424

TPS54424 4.5-V to 17-V Input, 4-A Synchronous SWIFT™ Step-Down Converter with Current Mode Control

Overview

TopologyBuck Converter
Input voltage4.5-17 V
Switching frequency200-1600 kHz
Output 11.8 V / 4 A

Description

The TPS54424 is a full featured 17-V, 4-A synchronous step-down DC/DC converter in a 3.5 mm x 3.5 mm HotRod™ QFN package.The device is optimized for small solution size through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through peak current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor footprint.The peak current mode control simplifies the loop compensation and provides fast transient response. Cycle-by-cycle peak current limiting on the high-side and low-side sourcing current limit protects the device in overload situations. Hiccup limits MOSFET power dissipation if a short circuit or over loading fault persists. A power good supervisor circuit monitors the regulator output. The PGOOD pin is an open-drain output and goes high impedance when the output voltage is in regulation. An internal deglitch time prevents the PGOOD pin from pulling low unless a fault has occurred. A dedicated EN pin can be used to control the regulator on/off and adjust the input undervoltage lockout. The output voltage start-up ramp is controlled by the SS/TRK pin, which allows operation as either a standalone power supply or in tracking situations.

Features

  • Small 3.5-mm x 3.5-mm HotRod™ QFN Package
  • Integrated 14.1-mΩ and 6.1-mΩ MOSFETs
  • Peak Current Mode Control with Fast Transient Response
  • 200-kHz to 1.6-MHz Fixed Switching Frequency
  • Synchronizes to External Clock
  • 0.6-V Voltage Reference ±0.85% Over Temperature
  • 0.6-V to 12-V Output Voltage Range
  • Hiccup Current Limit
  • Safe Startup into Pre-Biased Output Voltage
  • Adjustable Soft-start and Power Sequencing
  • Adjustable Input Under Voltage Lockout
  • 3-μA Shutdown Current
  • Power Good Output Monitor for Undervoltage and Overvoltage
  • Output Overvoltage Protection
  • Non-latch Thermal Shutdown Protection
  • –40°C to 150°C Operating Junction Temperature

Typical applications

  • Test and Measurement,Enterprise Switching
  • Telecom and Wireless Infrastructure, Server
  • Medical Imaging Equipment

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
SamplesAvailability & Sample
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74438357018
SPECWE-MAPI SMT Power Inductor, 1.8 µH, 7.9 A

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1.8 µH
Performance Rated Current7.9 A
Saturation Current @ 30%10.3 A
DC Resistance18 mΩ
Self Resonant Frequency42 MHz
Operating Voltage80 V
MountSMT 
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