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Semtech TS30012

High Efficiency 1A/2A/3A Current-Mode Synchronous Buck DC/DC Converter, 1MHz

Overview

TopologyBuck Converter
Input voltage4.5-24 V
Switching frequency900-1100 kHz
Output 11.8 V / 2 A
IC revision1.6

Description

The TS30011 (1A), TS30012 (2A) and TS30013 (3A) are DC/DC synchronous switching regulator with fully integrated power switches, internalcompensation, and full fault protection. The switching frequency of 1MHz enables the use of small filter components resulting in minimal board space and reduced BOM costs.

The TS30011/12/13 utilizes current mode feedback in normal regulation PWM mode. When the regulator is placed in standby (EN is low), the devicedraws less than 10uA quiescent current.

The TS30011/12/13 integrates a wide range of protection circuitry including input supply undervoltage lockout, output voltage soft start, currentlimit, and thermal shutdown.

The TS30011/12/13 includes supervisory reporting through the PG (Power Good) open drain output to interface other components in the system.

Features

  • Fixed output voltage choices: 1.5V, 1.8V, 2.5V, 3.3V, and 5V with +/- 2% output tolerance
  • Adjustable version output voltage range: 0.9V to5.5V with +/- 1.5% reference
  • Wide input voltage rangeTS30011/12: 4.5V to 24V (26.4V Abs Max) TS30013: 4.5V to 18V (20V Abs Max)
  • 1MHz +/- 10% fixed switching frequency
  • Continuous output current: 1A (TS30011), 2A (TS30012) and 3A (TS30013)

    -High efficiency – up to 95%

  • Current mode PWM control with PFM mode for improved light load efficiency
  • Voltage supervisor for VOUT reported at the PG pin
  • Input supply under voltage lockout
  • Soft start for controlled startup with no overshoot
  • Full protection for over-current, over-temperature, and VOUT over-voltage
  • Less than 10uA in standby mode
  • Low external component count

Typical applications

  • On-card switching regulators
  • Industrial power supplies
  • Set-top box, DVD, LCD, LED supply