The TPS61170 is a monolithic, high-voltage switching regulator with integrated 1.2-A, 40-V power MOSFET. The device 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 multicell 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 FB pin regulates to a reference voltage of 1.229 V. 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.

• 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

• Output Voltage Reprogramming

• Skip-Switching Cycle for Output
  Regulation at Light Load

• Built-in Soft Start

• 6-Pin, 2-mm × 2-mm QFN Package