General Description

The RT9262/A is a compact, high efficient, step-up DC/DC converter with an adaptive current mode PWM control loop, providing a stable and high efficient operation over a wide range of load currents. It operates in both continuous and discontinuous current modes in stable waveforms without external compensation.

The low start-up input voltage below 1V makes RT9262/A suitable for 1 to 4 battery cell applications providing up to 400mA output current. The 550kHz high switching rate minimized the size of external components. Besides, the 17μA low quiescent current together with high efficiency maintains long battery lifetime.

Features

• 1.0V Low Start-up Input Voltage

• High Supply Capability to Deliver 3.3V 100mA with 1V Input Voltage

• 17μA Quiescent (Switch-off) Supply Current

• 90 Efficiency

• 550kHz Fixed Switching Rate

• Providing Flexibility for Using Internal and External Power Switches

• Built-in 300mA LDO, also for the Zero-OutputCurrent Shutdown Mode (RT9262)

• Boost DC-DC Integrating LDO for Up-Down Regulation (RT9262)

• Built-in 0.86V Voltage Detector (RT9262A)

• 8-Pin SOP Package

• RoHS Compliant and 100 Lead (Pb)-Free

Applications

• PDA

• Portable Instrument

• Wireless Equipment

• DSC

• LCD Back Bias Circuit

• RF-Tags