TPS65262-1

ACTIVE

4.5V to 18V Input, 3A/1A/1A Triple Synchronous Step-Down Converter with 350mA/150mA Dual LDOs

Product details

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Iout (max) (A) 3 Vin (min) (V) 1.3 Vin (max) (V) 18 Switching frequency (min) (kHz) 540 Switching frequency (max) (kHz) 670 Features Adjustable current limit, Enable, Light-load efficiency, Power good, Soft-start adjustable, Soft-start fixed, Synchronous rectification, UVLO adjustable Vout (min) (V) 0.6 Vout (max) (V) 17 Iq (typ) (µA) 790
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Iout (max) (A) 3 Vin (min) (V) 1.3 Vin (max) (V) 18 Switching frequency (min) (kHz) 540 Switching frequency (max) (kHz) 670 Features Adjustable current limit, Enable, Light-load efficiency, Power good, Soft-start adjustable, Soft-start fixed, Synchronous rectification, UVLO adjustable Vout (min) (V) 0.6 Vout (max) (V) 17 Iq (typ) (µA) 790
VQFN (RHB) 32 25 mm² 5 x 5
  • Operating input voltage range: 4.5 to 18 V
  • Feedback reference voltage: 0.6 V ±1%
  • Maximum continuous output current: 3 A/1 A/1 A
  • Fixed 600-kHz switching frequency
  • Integrated dual LDOs with:
    • Input voltage range: 1.3 V to 5.5 V
    • Continuous output current: 350 mA/150 mA
  • Programmable soft-start time for Buck1
  • Fixed 1-ms soft-start time for Buck2 and Buck3
  • Internal loop compensation for Buck2 and Buck3
  • Dedicated enable pins for each buck
  • Automatic power-up and power-down sequence
  • Pulse Skipping Mode (PSM) at light load
  • Output voltage power-good indicator
  • Thermal overloading protection
  • Operating input voltage range: 4.5 to 18 V
  • Feedback reference voltage: 0.6 V ±1%
  • Maximum continuous output current: 3 A/1 A/1 A
  • Fixed 600-kHz switching frequency
  • Integrated dual LDOs with:
    • Input voltage range: 1.3 V to 5.5 V
    • Continuous output current: 350 mA/150 mA
  • Programmable soft-start time for Buck1
  • Fixed 1-ms soft-start time for Buck2 and Buck3
  • Internal loop compensation for Buck2 and Buck3
  • Dedicated enable pins for each buck
  • Automatic power-up and power-down sequence
  • Pulse Skipping Mode (PSM) at light load
  • Output voltage power-good indicator
  • Thermal overloading protection

The TPS65262-1 is a monolithic, triple-synchronous step-down (buck) converter with 3-A/1-A/1-A output current. A wide 4.5- to 18-V input supply voltage range encompasses the most intermediate bus voltage operating off 5-V, 9-V, 12-V, or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The device operates at 600-kHz fixed switching frequency. The loop compensations for buck 2 and buck3 have been integrated for less external components. The 180° out-of-phase operation between buck1 and buck2, buck3 (buck2 and buck3 run in phase) minimizes the input filter requirements. At light load, the device automatically operates in pulse skipping mode (PSM) which provides high efficiency by reducing switching losses.

Two low dropout voltage linear regulators (LDOs) are built in TPS65262-1 with input voltage range of 1.3 to 5.5 V, continuous output current 350/150 mA, independent enable, and adjustable output voltage.

The TPS65262-1 features an automatic power sequence with driving MODE pin to high and configuring EN1, EN2, and EN3 pins.

The device features protection for overvoltage, overcurrent, short-circuit, and overtemperature. A power good pin asserts when any buck output voltages are out of regulation.

The TPS65262-1 is a monolithic, triple-synchronous step-down (buck) converter with 3-A/1-A/1-A output current. A wide 4.5- to 18-V input supply voltage range encompasses the most intermediate bus voltage operating off 5-V, 9-V, 12-V, or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The device operates at 600-kHz fixed switching frequency. The loop compensations for buck 2 and buck3 have been integrated for less external components. The 180° out-of-phase operation between buck1 and buck2, buck3 (buck2 and buck3 run in phase) minimizes the input filter requirements. At light load, the device automatically operates in pulse skipping mode (PSM) which provides high efficiency by reducing switching losses.

Two low dropout voltage linear regulators (LDOs) are built in TPS65262-1 with input voltage range of 1.3 to 5.5 V, continuous output current 350/150 mA, independent enable, and adjustable output voltage.

The TPS65262-1 features an automatic power sequence with driving MODE pin to high and configuring EN1, EN2, and EN3 pins.

The device features protection for overvoltage, overcurrent, short-circuit, and overtemperature. A power good pin asserts when any buck output voltages are out of regulation.

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Technical documentation

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Type Title Date
* Data sheet TPS65262-1, 4.5- to 18-V Input Voltage, 3-A/1-A/1-A Output Current Triple Synchronous Step-Down Converter With Dual Adjustable 350-mA/150-mA LDOs datasheet (Rev. B) PDF | HTML 15 May 2023

Design & development

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Evaluation board

TPS65262EVM-619 — TPS65262 18V Input, Triple 3A/1A/1A Buck Converter with Dual 200mA/100mA LDO Evaluation Module

The TPS65262EVM-619 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65262. The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features.

User guide: PDF
Not available on TI.com
Simulation model

TPS65262 Unencrypted PSpice Average Model Package (Rev. A)

SLVMA11A.ZIP (107 KB) - PSpice Model
Package Pins CAD symbols, footprints & 3D models
VQFN (RHB) 32 Ultra Librarian

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