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