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RT9202

Richtek
Part Number RT9202
Manufacturer Richtek
Description Single Synchronous Buck PWM DC-DC Controller
Published Mar 30, 2015
Detailed Description RT9202 Single Synchronous Buck PWM DC-DC Controller General Description The RT9202 is a single power supply PWM DC-DC ...
Datasheet PDF File RT9202 PDF File

RT9202
RT9202

Overview
RT9202 Single Synchronous Buck PWM DC-DC Controller General Description The RT9202 is a single power supply PWM DC-DC converter controller designed to drive N-channel MOSFET in a synchronous buck topology.
The IC integrates the control, output adjustment, monitoring and protection functions in a small 8-pin package.
The RT9202 uses a low gain voltage mode PWM control for simple application design.
An internal 0.
8V reference allows the output voltage to be precisely regulated to low voltage requirement.
A fixed 300kHz oscillator reduces the component size for saving board space.
The RT9202 features over current protection, over voltage protection, and under voltage lock-out.
The output current is monitored by sensing the voltage drop across the MOSFET’s RDS(ON), which eliminates the need for a current sensing resistor.
Applications z Motherboard Power Regulation for Computers z Subsystems Power Supplies z Cable Modems, Set Top Box, and DSL Modems z DSP and Core Communications processor Supplies z Memory Power Supplies z Personal Computer Peripherals z Industrial Power Supplies z 5V-Input DC-DC Regulators z Low Voltage Distributed Power Supplies Features z Operate from 5V z 0.
8V Internal Reference z Drive Two N-channel MOSFET z Voltage Mode PWM Control z Fast Transient Response z Fixed 300kHz Oscillator Frequency z Full 0~100% Duty Cycle z Internal Soft Start z Adaptive Non-overlapping Gate Driver z Over-current Monitor Uses MOSFET RDS(ON) z Over-voltage Protection Uses Low-side MOSFET Pin Configurations Part Number Pin Configurations RT9202CS (Plastic SOP-8) TOP VIEW BOOT 1 UGATE 2 8 PHASE 7 OCSET GND 3 LGATE 4 6 FB 5 VCC Ordering Information RT9202… … Package type S : SOP-8 Operating temperature range C: Commercial standard DS9202-02 August 2002 www.
richtek.
com 1 RT9202 Typical Application Circuit SHDN H: shutdown Q2 2N7002 R1 20K R4 10 D1 8 PHASE BOOT 1 7 OCSET UGATE 2 6 RT9202 FB GND 3 5 VCC LGATE 4 C2 MA732 0.
1µF VOU T 2.
5V L2 5µH...


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