TPS61089RNRT Description

The TPS61089x represents the TPS61089 and the TPS610891. The TPS61089x is a fully-integrated synchronous boost converter with a 19-mΩ main power switch and a 27-mΩ rectifier switch. The device provides a high-efficiency and small-size power solution for portable equipment. The TPS61089x features a wide input voltage range from 2.7 V to 12 V to support applications powered with single-cell or two-cell Lithium ion/polymer batteries. The TPS61089x has 7-A continuous switch current capability and provides output voltage up to 12.6 V.

The output voltage of the TPS61089x is controlled using an adaptive constant off-time peak current control scheme. Pulse width modulation (PWM) is the mode in which the TPS61089x operates under conditions of moderate to heavy load. The TPS61089 operates in the pulse frequency modulation (PFM) mode to increase efficiency under light load, whereas the TPS610891 continues to operate in the PWM mode to prevent application issues brought on by low switching frequency. From 200 kHz to 2.2 MHz, the switching frequency in PWM mode is programmable.

TPS61089RNRT Features

• Input voltage range: 2.7 V to 12 V

• Output voltage range: 4.5 V to 12.6 V

• Up to 90% efficiency at VIN = 3.3 V, VOUT = 9 V, and IOUT = 2 A

• Resistor-programmable peak current limit up to 10 A for high pulse current

• Adjustable switching frequency: 200 kHz to 2.2 MHz

• 4-ms built-in soft start time

• PFM operation mode at light load (TPS61089)

• Forced PWM operation mode at light load (TPS610891)

• Internal output overvoltage protection at 13.2 V

• Cycle-by-cycle overcurrent protection

• Thermal shutdown

• 2.00-mm × 2.50-mm VQFN HotRod? package

TPS61089RNRT Applications

• Bluetooth? speaker

• Quick charge power bank

• Portable POS terminal