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TPS63021DSJR

Buck-Boost Converter, 1.8-5.5V in, 3.3V fixed out, 2A, 4A switches, 14-VSON

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Manufacturer Part：

TPS63021DSJR

Package：

14-VSON (4.0 x 3.0 x 1.0 mm)

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Description

Product Overview

The TPS63021DSJR from Texas Instruments is a high-efficiency single-inductor buck-boost converter with integrated 4A switches. It provides a fixed 3.3V output from a 1.8V to 5.5V input, delivering up to 2A output current. The device operates at 2.4MHz switching frequency with synchronous rectification and features power save mode for high efficiency across the entire load range.

Key Specifications

Topology Buck-Boost (single inductor)
Input Voltage Range 1.8V to 5.5V
Output Voltage 3.3V fixed
Output Current 2A (Vin>2.5V)
Switch Current Limit 4A typical
Switching Frequency 2.4MHz
Quiescent Current 25uA typical
Efficiency Up to 96%
Operating Temperature -40C to +85C
Package 14-VSON (4x3mm)

Features

  • Single-inductor buck-boost topology
  • 4A integrated switches for up to 2A output
  • Fixed 3.3V output voltage
  • 2.4MHz switching frequency minimizes external components
  • Automatic mode transition between buck and boost
  • Power save mode at light loads (25uA Iq)
  • Load disconnect during shutdown
  • Power good output and enable pin

Applications

  • Battery-powered portable devices
  • Single-cell Li-Ion to 3.3V conversion
  • Supercapacitor backup power
  • USB-powered devices
  • TEC driver applications

The TPS63021DSJR from Texas Instruments is a high-efficiency single-inductor buck-boost converter providing a fixed 3.3V output from a 1.8V to 5.5V input range. With integrated 4A switches and synchronous rectification, it delivers up to 2A output current. The 2.4MHz switching frequency allows the use of small external inductors and capacitors. The device automatically transitions between buck, boost, and buck-boost modes for seamless output regulation across the input voltage range. Power save mode maintains high efficiency at light loads with only 25uA quiescent current.

The TPS63021DSJR uses a single-inductor buck-boost architecture with four integrated MOSFET switches controlled by an average current-mode control loop. When the input voltage is above the output, the converter operates in buck mode. When below, it operates in boost mode. At input voltages near the output, it operates in buck-boost mode with all four switches active. The control loop automatically transitions between modes without output disturbance. At light loads, the device enters power save mode with reduced switching frequency to maintain efficiency. The power good output indicates when the output voltage is within regulation. During shutdown, the load is disconnected from the input to prevent battery drain.

Pin Name Type Function
1 VIN Power Input voltage (1.8-5.5V)
2 VIN Power Input voltage
3 PS/SYNC Control Power save / synchronization
4 EN Control Enable (active high)
5 VOUT Output Regulated 3.3V output
6 VOUT Output Regulated output
7 PG Output Power good (open drain)
8 FB Input Feedback (connect to VOUT for fixed version)
9 GND Power Ground
10 L1 Connect Inductor connection 1
11 L1 Connect Inductor connection 1
12 L2 Connect Inductor connection 2
13 L2 Connect Inductor connection 2
14 GND Power Ground / thermal pad
  • Single-cell Li-Ion battery to 3.3V system power
  • Supercapacitor backup power supplies
  • USB-powered device voltage regulation
  • Portable instrument and handheld device power
  • TEC (thermoelectric cooler) driver circuits
Manufacturer Part Number Package Notes
Texas Instruments TPS63020DSJR 14-VSON Adjustable output version
Texas Instruments TPS63070RNMR VQFN-12 3.6A switch, wider Vin range
Analog Devices LTC3115EDHD DFN-24 2A buck-boost, wider range
Microchip MCP16331T-E/CH SOT-23-6 Lower current buck-boost
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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.

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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