Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.75 Vout (Max) (V) 5 Iout (Max) (A) 1.5 Iq (Typ) (uA) 1300 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.75 Vout (Max) (V) 5 Iout (Max) (A) 1.5 Iq (Typ) (uA) 1300 Switching frequency (Min) (kHz) 700 Switching frequency (Max) (kHz) 700 Features Enable, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Synchronous Rectification Operating temperature range (C) -40 to 85 Rating Catalog Regulated outputs (#) 1
VQFN (RGT) 16 9 mm² 3 x 3
  • Continuous 1.5-A output current
  • 4.5-V to 18-V supply voltage range
  • 2-V to 18-V conversion voltage range
  • DCAP2™ mode control enables fast transient response
  • Low output ripple and support all MLCC output capacitor
  • Skip mode for light load control
  • Highly efficient integrated FETs optimized for lower duty cycle applications
  • High efficiency, less than 10-µA supply current at shutdown
  • Adjustable soft-start time
  • Support pre-biased soft start
  • 700-kHz switching frequency
  • Cycle-by-cycle overcurrent limit
  • Open-drain power-good indication
  • Internal bootstrap switch
  • Small 3-mm × 3-mm, 16-pin QFN (RGT) package
  • Continuous 1.5-A output current
  • 4.5-V to 18-V supply voltage range
  • 2-V to 18-V conversion voltage range
  • DCAP2™ mode control enables fast transient response
  • Low output ripple and support all MLCC output capacitor
  • Skip mode for light load control
  • Highly efficient integrated FETs optimized for lower duty cycle applications
  • High efficiency, less than 10-µA supply current at shutdown
  • Adjustable soft-start time
  • Support pre-biased soft start
  • 700-kHz switching frequency
  • Cycle-by-cycle overcurrent limit
  • Open-drain power-good indication
  • Internal bootstrap switch
  • Small 3-mm × 3-mm, 16-pin QFN (RGT) package

The TPS53511 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The device is suitable for points-of-load (POL) in computing power systems, and provides a cost-effective, low component count, low standby current solution. The main control loop for the TPS53511 uses the D-CAP2™ mode control to provide a fast transient response with no external components. The adaptive on-time control supports seamless operation between PWM mode during heavy load conditions and reduced frequency operation during light-load conditions for high efficiency.

The TPS53511 includes a proprietary circuit that enables the device to adapt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V supply input, and from 2-V to 18-V input power supply voltage. The device features an adjustable slow-start time and a power-good function. It also supports pre-biased soft start. The TPS53511 is available in a 16-pin QFN package, and is designed to operate from –40°C to 85°C.

The TPS53511 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The device is suitable for points-of-load (POL) in computing power systems, and provides a cost-effective, low component count, low standby current solution. The main control loop for the TPS53511 uses the D-CAP2™ mode control to provide a fast transient response with no external components. The adaptive on-time control supports seamless operation between PWM mode during heavy load conditions and reduced frequency operation during light-load conditions for high efficiency.

The TPS53511 includes a proprietary circuit that enables the device to adapt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V supply input, and from 2-V to 18-V input power supply voltage. The device features an adjustable slow-start time and a power-good function. It also supports pre-biased soft start. The TPS53511 is available in a 16-pin QFN package, and is designed to operate from –40°C to 85°C.

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Technical documentation

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Type Title Date
* Data sheet 4.5-V to 18-V Input, 1.5-A Step-Down Regulator with Integrated Switcher datasheet (Rev. B) 17 Aug 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note Unified Ground Connection Recommendation on TPS53K- Integrated FET-Converter Dev 25 Jan 2017

Design & development

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Simulation model

TPS53511 Unencrypted PSpice Transient Model Package (Rev. A)

SLUM380A.ZIP (319 KB) - PSpice Model
Simulation model

TPS53511 TINA-TI Transient Spice Model

SLUM393.ZIP (44 KB) - TINA-TI Spice Model
Simulation model

TPS53511 TINA-TI Transient Reference Design

SLUM394.TSC (197 KB) - TINA-TI Reference Design
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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VQFN (RGT) 16 View options

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