4.5-V to 18-V input, 6-A synchronous step-down voltage regulator


Product details


Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.6 Vout (Max) (V) 7 Iout (Max) (A) 6 Iq (Typ) (uA) 110 Switching frequency (Min) (kHz) 600 Switching frequency (Max) (kHz) 600 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Power Good, Pre-Bias Start-Up, Soft Start Fixed, Forced PWM Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN-HR (RJN) 13 6 mm² 3 x 2 open-in-new Find other Buck converters (integrated switch)


  • Input voltage range: 4.5 V to 18 V
  • Output voltage range: 0.6 V to 7 V
  • ±1% reference voltage at room temperature
  • Supports 6-A continuous output current
  • D-CAP3™ architecture control for fast transient response
  • Integrated 25-mΩ and 12-mΩ RDS(on) power FETs
  • 108-µA low quiescent current
  • Selectable Eco-Mode™, Out-Of-Audio™ and FCCM by MODE pin
  • Out-Of-Audio™ light-load operation with switching frequency over 25 kHz
  • Supports pre-biased start up function
  • 600-kHz switching frequency
  • Internal 1-ms soft start
  • Supports ceramic output capacitors
  • Power good indicator
  • Cycle-by-cycle valley over current protection
  • Non-latched for OC, OV, UV, OT and UVLO protections
  • 3.0-mm × 2.0-mm HotRod™ VQFN package
  • Create a Custom Design Using the TPS566235 With the WEBENCH® Power Designer

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The TPS566235 is a cost effective, high-voltage input, high efficiency synchronous Buck converter with integrated FETs. It enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution.

The TPS566235 employs the D-CAP3™ mode control that provides a fast transient response and good line/load regulation with no external compensation components. It also has a proprietary circuit that enables the device to support low equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors. The control topology supports seamless transition between CCM mode at heavy load conditions and DCM operation at light load conditions. There are three operation modes can be configured by MODE pin at light load: Eco-Mode™, Out-Of-Audio™ (OOA) and Forced Continuous Conduction Mode (FCCM). The OOA mode is a unique control feature that keeps the switching frequency above audible frequency with minimum reduction in efficiency.

The TPS566235 supports pre-biased start up and power good indicator. It provides complete protection including OVP, UVP, OCP, OTP and UVLO. The device is available in 3.0-mm x 2.0-mm HotRod™ package and the junction temperature is specified from –40°C to 125°C.

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Technical documentation

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Type Title Date
* Datasheet TPS566235 4.5-V to 18-V Input, 6-A Synchronous Step-Down Converter datasheet (Rev. B) Apr. 17, 2019
Selection guide Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Understanding OOA Operation Mode Feb. 15, 2019
User guide TPS566235EVM-036 Evaluation Module Dec. 05, 2018

Design & development

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Hardware development

TPS566235 is a cost effective, high performance, synchronous buck converter with integrated FETs. The TPS566235 evaluation module (EVM) is a fully assembled and tested circuit for evaluating TPS566235 device. It operates with supply input voltage ranging from 4.5 V to 18 V. TPS566235 uses DCAP3 (...)
  • Input voltage range: 4.5 V to 18 V
  • Output voltage: 0.6 V to 7 V
  • 6-A integrated 27 mΩ/13 mΩ Rdson FET converter
  • D-CAP3 architecture to enable POSCAP and MLCC output capacitor usage
  • PSM/FCCM/OOA mode selectable
  • 3 mm x 2 mm HotRod QFN package

Design tools & simulation

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  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
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CAD/CAE symbols

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VQFN-HR (RJN) 13 View options

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