General Description

The RT9272 is a high efficiency step-up DC-DC converter specifically designed for dual panel mobile phone applications.

According to SP status, RT9272 can either regulates output current flowing through series-connected LEDs for main panel or for sub panel with a common output LC filter. This along with compact VDFN-10L 3x3 package and high switching frequency allows less part count and smaller external components for space and cost saving.

Features

• Low VIN Operating Range : 2.7V to 4.5V

• Maximum Output Voltage up to 16V

• Small LC filter by 1.1MHz Operation Frequency

• Share One Set of Inductor and Schottky Diode for 2 Channels

• Programmable Dimming Function by EN Pin with 100Hz to 1kHz

• 40μA Quiescent Current (Switch-Off)

• Internal Soft-Start Function to Avoid PWM Dimming Noise.

• Zero Shut Down Supply Current

• Complete Protection : OVP, OCP, OTP and SS

• RoHS Compliant and 100 Lead (Pb)-Free

Applications

• Dual panel mobile phone, with LED backlight