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Home > Embedded ICs > Embedded - Microcontroller Unit (MCU) > TPS51225CRUKR
Texas Instruments

TPS51225CRUKR

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TPS51225CRUKR Overview

The TPS51225/B/C is a cost-effective, dual-synchronous buck controller targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 260-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency. The TPS51225/B/C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D-CAP? control provides convenient and efficient operation. The device operates with supply input voltage ranging from 5.5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51225/B/C is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified from –40°C to 85°C.

Features

  • Input Voltage Range: 5.5 V to 24 V
  • Output Voltages: 5 V and 3.3 V (Adjustable Range ±10%)
  • Built-in, 100-mA, 5-V and 3.3-V LDOs
  • Clock Output for Charge-Pump
  • ±1% Reference Accuracy
  • Adaptive On-time D-CAP Mode Control Architecture with 300kHz/355kHz Frequency Setting
  • Auto-skip Light Load Operation (TPS51225/C)
  • OOA Light Load Operation (TPS51225B)
  • Internal 0.8-ms Voltage Servo Soft-Start
  • Low-Side RDS(on) Current Sensing Scheme with 4500 ppm/°C Temperature Coefficient
  • Built-in Output Discharge Function
  • Separate Enable Input for Switchers (TPS51225/B/C)
  • Dedicated OC Setting Terminals
  • Power Good Indicator
  • OVP/UVP/OCP Protection
  • Non-latch UVLO/OTP Protection
  • 20-Pin, 3 mm × 3 mm, QFN (RUK)

Specifications

Circuit Diagram

TPS51225CRUKR

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