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TPS61170DRVT

TITPS61170DRVT

Texas Instruments
Boost, Buck-Boost, Flyback, SEPIC Switching Regulator IC Positive Adjustable 3V 1 Output 960mA (Switch) 6-WDFN Exposed Pad
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Overview

The TPS61170DRVT is a monolithic high-voltage switching regulator from Texas Instruments with an integrated 1.2A, 40V power MOSFET. It operates at a fixed 1.2MHz switching frequency, allowing for the use of small external inductors and capacitors in space-constrained designs. The device is highly versatile, supporting Boost, Buck-Boost, SEPIC, and Flyback topologies with an input voltage range of 3V to 18V.

Why Choose This Part

The high 1.2MHz switching frequency significantly reduces the footprint of passive components, while the 3V to 18V input range accommodates various battery and industrial bus configurations. It features built-in soft start and a low 1uA shutdown current for power-sensitive designs. Additionally, it supports flexible output control through PWM or the EasyScale single-wire interface for on-the-fly voltage reprogramming.

Applications

LED Backlighting
Driving small-to-medium LCD backlights or LED strings requiring constant current via SEPIC or Boost configurations.
Industrial Sensor Supplies
Generating high-voltage bias rails for industrial instrumentation and sensors from a 5V or 12V bus.
OLED Display Power
Providing the stable high-voltage rail required for active-matrix organic light-emitting diode panels.
Portable Medical Devices
Efficiently boosting battery voltages in compact handheld equipment where board space is limited.

Key Specifications

Function Step-Up, Step-Up/Step-Down
Topology Boost, Buck-Boost, Flyback, SEPIC
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 6-WDFN Exposed Pad
Current - Output 960mA (Switch)
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 1.2MHz
Operating Temperature -40degC ~ 85degC (TA)
Synchronous Rectifier No
Voltage - Input (Max) 18V
Voltage - Input (Min) 3V
Voltage - Output (Max) 38V
Supplier Device Package 6-WSON (2x2)
Voltage - Output (Min/Fixed) 3V

Getting Started

Engineers can evaluate this part using the TPS61170EVM-280 evaluation module, which is configured as a boost converter. When designing a custom PCB, ensure the feedback resistors are placed close to the IC to minimize noise pickup on the FB pin. For stable operation at the 1.2MHz switching rate, use low-ESR ceramic capacitors and keep the power loops short to manage EMI.