TPS563249 Synchronous Step-Down Voltage Regulator

By Texas Instruments 61

TPS563249 Synchronous Step-Down Voltage Regulator

Texas Instruments' TPS563249 is a simple, easy-to-use, 3 A synchronous step-down converter housed in a SOT-23 package. The device is optimized to operate with minimum external component counts and to achieve low standby current.

This switching regulator employs D-CAP3 mode control providing a fast transient response and supporting low-equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors with no external compensation components.

The TPS563249 operates in forced continuous conduction mode (FCCM) which maintains a fixed 1.4 MHz switching frequency during light-load operations and eliminates system interference. The converter is available in a 6-pin 1.6 mm × 2.9 mm SOT (DDC) package and is specified from a -40°C to 125°C junction temperature.

Features
  • 3 A converter integrated 70 mΩ and 30 mΩ FETs
  • D-CAP3 mode control with a fast transient response
  • Input voltage range: 4.5 V to 17 V
  • Output voltage range: 0.6 V to 7 V
  • Forced continuous conduction mode
  • Constant 1.4 MHz switching frequency
  • Low shutdown current: <10 µA
  • 1% feedback voltage accuracy (+25°C)
  • Startup from pre-biased output voltage
  • Cycle-by-cycle overcurrent limit
  • Hiccup-mode overcurrent protection
  • Non-latch UVP and TSD protections
  • Fixed soft-start: 1.7 ms
Applications
  • Broadband modems
  • Access point networks
  • Wireless routers
  • Surveillance
  • TVs, set-top boxes

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