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TPSM828511

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2.7-V to 6-V, 1-A low-noise step-down module with integrated inductor in QFN package

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Data sheet

TPSM828511

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Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Type Converter Iout (max) (A) 1 Vin (min) (V) 2.7 Vin (max) (V) 6 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Switching frequency (min) (kHz) 4000 Switching frequency (max) (kHz) 1800 Features 1% accuracy, Enable, Forced PWM, Frequency synchronization, Light load efficiency, Output discharge, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable Control mode current mode Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 125 Type Converter Iout (max) (A) 1 Vin (min) (V) 2.7 Vin (max) (V) 6 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Switching frequency (min) (kHz) 4000 Switching frequency (max) (kHz) 1800 Features 1% accuracy, Enable, Forced PWM, Frequency synchronization, Light load efficiency, Output discharge, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO adjustable Control mode current mode Duty cycle (max) (%) 100
QFN-FCMOD (RDY) 9 8.1 mm² 2.7 x 3
  • 2.7-V to 6-V input voltage range
  • 0.6-V to 5.5-V output voltage range
  • Family of 0.5-A, 1-A and 2-A devices
  • 20-µA typical quiescent current
  • ±1% feedback voltage accuracy (PWM operation)
  • 2.25-MHz switching frequency (PWM operation)
  • 1.8-MHz to 4-MHz external synchronization
  • Selectable forced PWM or PFM/PWM operation
  • Adjustable soft start-up to 10 ms or tracking
  • Precise ENABLE input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Power-good output with window comparator
  • –40°C to 125°C operating temperature range
  • 2.7-mm × 3.0-mm QFN package with 0.5-mm pitch
  • 2.7-V to 6-V input voltage range
  • 0.6-V to 5.5-V output voltage range
  • Family of 0.5-A, 1-A and 2-A devices
  • 20-µA typical quiescent current
  • ±1% feedback voltage accuracy (PWM operation)
  • 2.25-MHz switching frequency (PWM operation)
  • 1.8-MHz to 4-MHz external synchronization
  • Selectable forced PWM or PFM/PWM operation
  • Adjustable soft start-up to 10 ms or tracking
  • Precise ENABLE input allows
    • User-defined undervoltage lockout
    • Exact sequencing
  • 100% duty cycle mode
  • Active output discharge
  • Power-good output with window comparator
  • –40°C to 125°C operating temperature range
  • 2.7-mm × 3.0-mm QFN package with 0.5-mm pitch

TPSM82851x is a family of pin-to-pin compatible, 0.5-A, 1-A, and 2-A high-efficiency and easy to use synchronous step-down DC/DC power modules with integrated inductors. The devices are based on a fixed-frequency peak current-mode control topology and they can be used in telecommunication, test and measurement, and medical applications with high power density and ease of use requirements. Low resistance switches allow up to 2-A continuous output current at high ambient temperatures. The switching frequency is internally fixed at 2.25 MHz and can also be synchronized to an external clock in the range from 1.8 MHz to 4 MHz. In PFM/PWM mode, the TPSM82851x automatically enters power save mode at light loads to maintain high efficiency across the whole load range. The TPSM82851x provides a 1% feedback voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin sets the start-up time or tracks the output voltage to an external source. This feature allows external sequencing of different supply rails and limits the inrush current during start-up.

TPSM82851x is a family of pin-to-pin compatible, 0.5-A, 1-A, and 2-A high-efficiency and easy to use synchronous step-down DC/DC power modules with integrated inductors. The devices are based on a fixed-frequency peak current-mode control topology and they can be used in telecommunication, test and measurement, and medical applications with high power density and ease of use requirements. Low resistance switches allow up to 2-A continuous output current at high ambient temperatures. The switching frequency is internally fixed at 2.25 MHz and can also be synchronized to an external clock in the range from 1.8 MHz to 4 MHz. In PFM/PWM mode, the TPSM82851x automatically enters power save mode at light loads to maintain high efficiency across the whole load range. The TPSM82851x provides a 1% feedback voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin sets the start-up time or tracks the output voltage to an external source. This feature allows external sequencing of different supply rails and limits the inrush current during start-up.
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Technical documentation

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* Data sheet TPSM82851x 2.7-V to 6-V Input, 0.5-A/1-A/2-A Step-Down Power Module With Integrated Inductor datasheet PDF | HTML 08 Nov 2023
Certificate TPSM828511EVM EU Declaration of Conformity (DoC) 14 Jun 2023
EVM User's guide TPSM82851xEVM Evaluation Module User's Guide PDF | HTML 13 Jun 2023

Design & development

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Evaluation board

TPSM828511EVM — TPSM828511 evaluation module for 2.7-V to 6-V, 1-A step-down converter with integrated inductor

The TPSM828511 evaluation module (EVM) facilitates the evaluation of the TPSM828511, 1-A step-down converter power modules in a 2.7 mm × 3 mm × 2 mm over-molded QFN package. The EVM regulates the output voltage to 1.8 V with the input voltage from 2.7 V to 6 V. The (...)

User guide: PDF | HTML
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Simulation model

TPSM828511 PSpice Unencrypted Transient Model

SLUM914.ZIP (98 KB) - PSpice Model
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QFN-FCMOD (RDY) 9 Ultra Librarian
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