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TPS53511

ACTIVE

1.5A Step-Down Regulator with Integrated MOSFETs

A newer version of this product is available

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Similar functionality to the compared device
TPS562211 ACTIVE 4.2-V to 18-V, 2-A, synchronous buck converter with 1% accuracy, PG/SS and PFM/forced-PWM in SOT583 Higher efficiency with lower external component count in a smaller package.

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) (mA) 1.3 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 Control mode D-CAP2 Duty cycle (max) (%) 95 Type Converter
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) (mA) 1.3 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 Control mode D-CAP2 Duty cycle (max) (%) 95 Type Converter
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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TPS54326 ACTIVE 4.5V to 18V Input, 3A Synchronous Step-Down Converter with Eco-Mode™ The 3-A TPS54326 in the 4x4mm QFN package is interchangeable with the 1.5-A TPS53511
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NEW TPS562203 ACTIVE 4.2-V to 17-V input, 2-A synchronous buck converter in SOT563 with eco-mode This new product has smaller package and simplified design
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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) PDF | HTML 17 Aug 2021
Technical article 如何閉鎖具有打嗝模式故障回應的電源轉換器 PDF | HTML 14 Mar 2024
Technical article 히컵 오류 응답을 지원하는 전력 컨버터를 래치하는 방법 PDF | HTML 14 Mar 2024
Technical article How to latch off a power converter that has a hiccup fault response PDF | HTML 20 Dec 2023
Application note Unified Ground Connection Recommendation on TPS53K- Integrated FET-Converter Dev 25 Jan 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

TPS53511 TINA-TI Transient Reference Design

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

TPS53511 TINA-TI Transient Spice Model

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

TPS53511 Unencrypted PSpice Transient Model Package (Rev. A)

SLUM380A.ZIP (319 KB) - PSpice Model
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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