Product details

Vin (Min) (V) 2.7 Vin (Max) (V) 6 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Iout (Max) (A) 1 Iq (Typ) (uA) 15 Switching frequency (Min) (kHz) 1800 Switching frequency (Max) (kHz) 4000 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Output Discharge, Over Current Protection, Power Good, Soft Start Adjustable, Spread Spectrum, Synchronous Rectification, Tracking, UVLO Fixed, Wettable Flanks Package Operating temperature range (C) -55 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 2.7 Vin (Max) (V) 6 Vout (Min) (V) 0.6 Vout (Max) (V) 5.5 Iout (Max) (A) 1 Iq (Typ) (uA) 15 Switching frequency (Min) (kHz) 1800 Switching frequency (Max) (kHz) 4000 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Output Discharge, Over Current Protection, Power Good, Soft Start Adjustable, Spread Spectrum, Synchronous Rectification, Tracking, UVLO Fixed, Wettable Flanks Package Operating temperature range (C) -55 to 125 Rating Catalog Regulated outputs (#) 1
  • Functional Safety-Capable
  • Extended junction temperature from –55°C to +150°C
  • Input voltage range: 2.75 V to 6 V
  • Family of 1-A, 2-A, 3-A, and 4-A converters
  • Quiescent current: 15 µA typical
  • Output voltage from 0.6 V to 5.5 V
  • Output voltage accuracy ±1% (FPWM operation)
  • Adjustable soft start
  • Start-up at –55°C
  • Forced PWM or PWM and PFM operation
  • Adjustable switching frequency of 1.8 MHz to 4 MHz
  • Precise ENABLE input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Spread spectrum clocking - optional
  • Power good output with window comparator
  • Package with wettable flanks
  • Functional Safety-Capable
  • Extended junction temperature from –55°C to +150°C
  • Input voltage range: 2.75 V to 6 V
  • Family of 1-A, 2-A, 3-A, and 4-A converters
  • Quiescent current: 15 µA typical
  • Output voltage from 0.6 V to 5.5 V
  • Output voltage accuracy ±1% (FPWM operation)
  • Adjustable soft start
  • Start-up at –55°C
  • Forced PWM or PWM and PFM operation
  • Adjustable switching frequency of 1.8 MHz to 4 MHz
  • Precise ENABLE input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Spread spectrum clocking - optional
  • Power good output with window comparator
  • Package with wettable flanks

The TPS6281xM is family of pin-to-pin 1-A, 2-A, 3-A, and 4-A synchronous step-down DC/DC converters. All devices offer high efficiency and ease of use. The family of devices is based on a peak current mode control topology. Low-resistive switches allow up to 4-A continuous output current at high ambient temperature. The switching frequency is externally adjustable from 1.8 MHz to 4 MHz and can also be synchronized to an external clock in the same frequency range. The device can automatically enter power save mode (PSM) at light loads to maintain high efficiency across the whole load range. The device provides 1% output voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin allows the user to set the start-up time or form tracking of the output voltage to an external source, allowing external sequencing of different supply rails and limiting the inrush current during start-up.

The TPS6281xM device is available in a 2-mm × 3-mm VQFN package with wettable flanks.

The TPS6281xM is family of pin-to-pin 1-A, 2-A, 3-A, and 4-A synchronous step-down DC/DC converters. All devices offer high efficiency and ease of use. The family of devices is based on a peak current mode control topology. Low-resistive switches allow up to 4-A continuous output current at high ambient temperature. The switching frequency is externally adjustable from 1.8 MHz to 4 MHz and can also be synchronized to an external clock in the same frequency range. The device can automatically enter power save mode (PSM) at light loads to maintain high efficiency across the whole load range. The device provides 1% output voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin allows the user to set the start-up time or form tracking of the output voltage to an external source, allowing external sequencing of different supply rails and limiting the inrush current during start-up.

The TPS6281xM device is available in a 2-mm × 3-mm VQFN package with wettable flanks.

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Design & development

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Evaluation board

TPS62810EVM-015 — Buck Converter Evaluation Module

The TPS62810EVM-015 evaluation module (EVM) is designed to help the user easily evaluate and test the operation and functionality of the TPS6281X-Q1 automotive step-down converter family. The EVM converts a 2.7-V to 6.0-V input voltage to a regulated 1.8-V output voltage that delivers up to 4 A.

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This reference design shows the performance of a non-isolated automotive power supply for a driving monitoring system for the electronic control unit (ECU). The reference design includes our power portfolio with nine power sockets.
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