RT9267

Pinout




Description

The RT9267 is a triple output DC-DC converter IC including two adaptive PWM controllers, one low dropout regulator, and one voltage detector. RT9267 is capable of delivering hundreds of mA output current and consumes only 40mA quiescent current for the whole IC.
The adaptive PWM controllers are configured for boost applications with built-in 2A NMOS for each channel. The proprietary adaptive PWM loop provides PWM operation for heavier output loading conditions and PFM for lighter loading, with seamless auto-transition. The 550kHz switching rate reduces the size of external passive components.
The low dropout linear regulator (LDO) is designed with a built-in 300mA PMOS, providing 1mV/mA low dropout voltage with respect to variant output current values.
The voltage detector provides the supervisory function with open collector pull-low output. All the 4 function units are adjustable, and each can be set with two resistors in divider connection. The reference voltage for each channel is set to 1.25V for the two adaptive PWM controllers, and 0.86V for the LDO and the voltage detector.
The RT9267 is in TSSOP 16 pin package which fits space-limited hand held devices well.