RT9270

Features:

` 90% Efficiency
` VIN Operating Range: 2.3V to 5.5V
` 1.9A, 0.25, 16V Internal Power MOSFET
` 670kHz and 1.3MHz Operation Frequency
` External Compensation Network
` Programmable Soft Start Function
` Small MSOP8 Package
` Short Circuit Protection , Thermal Shutdown, OVP are included
` RoHS Compliant and 100% Lead (Pb)-Free




Application

· TFT LCD panel
· OLED Display
· PCMCIA Cards
· Portable Device




Pinout








Specifications

· Supply Voltage, VIN --------------------------------------------------------- −0.3 to 6V
· LX to GND ---------------------------------------------------------------- −0.3V to 16V
· The other pins ------------------------------------------------------------- −0.3V to 6V
· Power Dissipation, PD @ TA = 70°C
MSOP-8 --------------------------------------------------------------------------300mW
· Junction Temperature ----------------------------------------------------------- 150°C
· Lead Temperature (Soldering, 10 sec.) ----------------------------------------- 260°C
· Operation Temperature Range --------------------------------------- −40°C to 85°C
· Storage Temperature Range ---------------------------------------- −65°C to 150°C
· ESD Susceptibility (Note 2)
HBM (Human Body Mode) -----------------------------------------------------------2kV
MM (Machine Mode) --------------------------------------------------------------- 200V




Description

The RT9270 is a high performance, low noise, fixed frequency step up DC-DC Converter. The RT9270 converters input voltage ranging 2.3V to 5.5V into output voltage up to 14V. Current mode control with external compensation network makes it easy to stabilize the system and keep maximum flexibility. Programmable soft start function minimizes impact on the input power system. Internal power MOSFET with very low R_DS(ON) provides high efficiency. The RT9270 automatically transits from PWM to PSM (Pulse Skipping Mode) during light load condition further increasing efficiency. 670kHz and 1.3MHz operation frequency options provide flexibiltity of minimum output filter size, maximum efficiency and low BOM cost.
The RT9270 also provides comprehensive protection functions such as UVLO, OCP, OTP, OVP and short circuit protection.

The RT9270 is a high performance, low noise, fixed frequency step up DC-DC Converter. The RT9270 converters input voltage ranging 2.3V to 5.5V into output voltage up to 14V. Current mode control with external compensation network makes it easy to stabilize the system and keep maximum flexibility. Programmable soft start function minimizes impact on the input power system. Internal power MOSFET with very low R _DS(ON) provides high efficiency. The RT9270 automatically transits from PWM to PSM (Pulse Skipping Mode) during light load condition further increasing efficiency. 670kHz and 1.3MHz operation frequency options provide flexibiltity of minimum output filter size, maximum efficiency and low BOM cost.

The RT9270 also provides comprehensive protection functions such as UVLO, OCP, OTP, OVP and short circuit protection