Texas Instruments TPS61170

Description

The TPS61170 is a monolithic, high-voltage switching regulator with integrated 1.2-A, 40-V power MOSFET. It can be configured in several standard switching-regulator topologies, including boost and SEPIC. The device has a wide input-voltage range to support applications with input voltage from multi-cell batteries or regulated 5-V, 12-V power rails. The TPS61170 operates at a 1.2-MHz switching frequency, allowing the use of low-profile inductors and low-value ceramic input and output capacitors. External loop compensation components give the user flexibility to optimize loop compensation and transient response. The device has built-in protection features, such as pulse-by pulse overcurrent limit, soft start and thermal shutdown. The reference voltage to which the FB pin regulates is 1.229V. The reference voltage can be lowered using a 1-wire digital interface (Easyscale™ protocol) through the CTRL pin. Alternatively, a pulse width-modulation (PWM) signal can be applied to the CTRL pin. The duty cycle of the signal reduces the feedback reference voltage proportionally. The TPS61170 is available in a 6-pin 2 mm × 2 mm QFN package, allowing a compact power-supply solution.

Features

• 3-V to 18-V Input Voltage Range
• High Output Voltage: Up to 38 V
• 1.2-A integrated Switch
• 1.2-MHz Fixed Switching Frequency
• 12 V at 300 mA and 24 V at 150 mA from 5-V Input (Typical)
• Up to 93% Efficiency
• On-The-Fly Output Voltage Reprogramming
• Skip-Switching Cycle for Output Regulation at Light Load
• Built-in Soft Start
• 6-Pin, 2 mm × 2 mm QFN Package

Typical applications

• Buck Boost Regulation Using SEPIC Topology
• 5-V to 12-V and 24-V, 12-V to 24-V Boost
• ADSL Modems

More information

• Datasheet
• IC product information