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TPS54320RHLR

3A Synchronous Buck Converter, 4.5-17V input, integrated MOSFETs, VQFN-14

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Manufacturer Part：

TPS54320RHLR

Package：

VQFN-14 (3.5 x 3.5 x 0.95 mm)

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Description

Product Overview

The TPS54320RHLR from Texas Instruments is a 4.5V to 17V input, 3A synchronous step-down SWIFT converter with integrated 57mOhm/50mOhm MOSFETs. It features adjustable switching frequency from 200kHz to 1.2MHz, power good output, and a compact VQFN-14 package. The device is designed for point-of-load power conversion in broadband, networking, and DSP/FPGA applications.

Key Specifications

Topology Synchronous Buck (SWIFT)
Input Voltage Range 4.5V to 17V (VIN), 1.6V to 17V (PVIN)
Output Voltage 0.8V to 15V (adjustable)
Output Current 3A maximum
Switching Frequency 200kHz to 1.2MHz (adjustable)
MOSFET Rds(on) 57mOhm (HS) / 50mOhm (LS)
Shutdown Iq 2uA
Operating Temperature -40C to +150C (TJ)
Package VQFN-14 (3.5×3.5mm)

Features

  • Integrated 57mOhm/50mOhm MOSFETs
  • Adjustable switching frequency via resistor
  • Power Good output for sequencing
  • Adjustable soft-start with tracking
  • Split VIN/PVIN rails for efficiency optimization
  • Hiccup mode overcurrent protection
  • Pre-bias start-up capability
  • UVLO with programmable threshold

Applications

  • Broadband and networking equipment
  • DSP and FPGA point-of-load power
  • Industrial control power supplies
  • Telecom distributed power systems
  • Server and storage power rails

The TPS54320RHLR from Texas Instruments is a 3A synchronous step-down converter in the SWIFT family with integrated power MOSFETs (57mOhm/50mOhm). It accepts input voltages from 4.5V to 17V and provides an adjustable output from 0.8V to 15V. The switching frequency is adjustable from 200kHz to 1.2MHz via an external resistor, allowing optimization of efficiency and solution size. Power Good output and adjustable soft-start with tracking support power sequencing in multi-rail systems. The split VIN/PVIN feature enables independent bias supply for improved efficiency at low output voltages.

The TPS54320RHLR uses a current-mode control architecture with an internal oscillator set by an external resistor. The high-side MOSFET connects the input to the inductor during the on-time, charging the output capacitor and supplying the load. During the off-time, the low-side MOSFET provides a path for inductor current freewheeling. The feedback loop regulates the output voltage by adjusting the duty cycle. Current-mode control provides cycle-by-cycle current limiting. In hiccup mode overcurrent protection, the device cycles through periods of switching and rest to limit average fault current. The Power Good comparator monitors the output voltage and asserts when within regulation. The soft-start circuit controls output voltage ramp-up to limit inrush current.

Pin Name Type Function
1 BOOT Connect Bootstrap capacitor connection
2 VIN Power Input voltage (4.5-17V)
3 PVIN Power Power stage input (1.6-17V)
4 VIN Power Input voltage
5 SS/TRK Control Soft-start / tracking input
6 COMP Control Error amplifier compensation output
7 FB Input Feedback voltage input
8 PG Output Power Good output (open drain)
9 EN Control Enable input (active high)
10 RT/CLK Control Frequency set resistor / external clock sync
11-12 GND Power Ground
13-14 SW Output Switch node (inductor connection)
  • Broadband and networking equipment point-of-load power
  • DSP and FPGA core and I/O voltage regulation
  • Industrial control and automation power supplies
  • Telecom distributed power architecture (DPA)
  • Server and storage system intermediate bus conversion
Manufacturer Part Number Package Notes
Texas Instruments TPS54325RHLR VQFN-14 Pin-compatible 5A version
Texas Instruments TPS5430DDAR SOIC-8 3A, 36V input, non-synchronous
onsemi NCP3235NMNTXG QFN-16 5A synchronous buck
Infineon IR3827MTRPBF PQFN-16 4A integrated buck regulator
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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