TPS53353 High-Efficiency 20-A SWIFT™ Synchronous Buck Converter with Eco-mode™ |

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High-Efficiency 20-A SWIFT™ Synchronous Buck Converter with Eco-mode™


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Special Note

A pin-to-pin match with TPS53319 and TPS53355.


TPS53353 is a D-CAP™ mode, 20-A synchronous switcher with integrated MOSFETs. It is designed for ease of use, low external component count, and space-conscious power systems.

This device features 5.5-mΩ / 2.2-mΩ integrated MOSFETs, accurate 1%, 0.6-V reference, and integrated boost switch. A sample of competitive features include: a conversion input voltage range from 1.5 V to 15 V, very low external component count, D-CAP™ mode control for super fast transient, auto-skip mode operation, internal soft-start control, selectable frequency, and no need for compensation.

The conversion input voltage ranges from 1.5 V to 15 V, the supply voltage range is from 4.5 V to 25 V, and the output voltage range is from 0.6 V to 5.5 V.

The device is available in 5-mm × 6-mm, 22-pin QFN package and is specified from –40°C to 85°C.


  • Conversion Input Voltage Range: 1.5 V to 15 V
  • VDD Input Voltage Range: 4.5 V to 25 V
  • 92% Efficiency From 12 V to 1.5 V at 20 A
  • Output Voltage Range: 0.6 V to 5.5 V
  • 5-V LDO Output
  • Supports Single-Rail Input
  • Integrated Power MOSFETs With 20 A of
    Continuous Output Current
  • Auto-Skip Eco-mode™ for Light-Load Efficiency
  • < 10-µA Shutdown Current
  • D-CAP™ Mode With Fast Transient Response
  • Selectable Switching Frequency From 250 kHz to
    1 MHz With External Resistor
  • Selectable Auto-Skip or PWM-Only Operation
  • Built-in 1% 0.6-V Reference.
  • 0.7-ms, 1.4-ms, 2.8-ms and 5.6-ms Selectable
    Internal Voltage Servo Soft-Start
  • Integrated Boost Switch
  • Precharged Start-up Capability
  • Adjustable Overcurrent Limit With Thermal
  • Overvoltage, Undervoltage, UVLO and
    Overtemperature Protection
  • Supports All Ceramic Output Capacitors
  • Open-Drain Power-Good Indication
  • Incorporates NexFET™ Power Block Technology
  • 22-Pin QFN Package With PowerPAD™
  • For SWIFT™ Power Products Documentation,

WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS53353

  Min   Max Range
Vin  V 1.5 to 15.0V
Vout  V 0.6 to 5.5V
Iout  A ≤ 20A
Ambient Temp  °C -40 to 150°C


Compare all products in Buck converters (integrated switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS53353 Order now 1.5     15     0.6     5.5     20     1     250     1000     0.32     Adjustable Current Limit
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Forced PWM
Soft Start Adjustable
Over Current Protection
UVLO Fixed    
D-CAP     90     -40 to 85     Catalog     LSON-CLIP | 22     Converter     22LSON-CLIP: 30 mm2: 5 x 6 (LSON-CLIP | 22)