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RT8237E

RICHTEK
Part Number RT8237E
Manufacturer RICHTEK
Description High Efficiency Single Synchronous Buck PWM Controller
Published Mar 25, 2019
Detailed Description ® RT8237E High Efficiency Single Synchronous Buck PWM Controller General Description The RT8237E PWM controller provid...
Datasheet PDF File RT8237E PDF File

RT8237E
RT8237E

Overview
® RT8237E High Efficiency Single Synchronous Buck PWM Controller General Description The RT8237E PWM controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers.
The constant on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency.
The RT8237E achieves high efficiency at a reduced cost by eliminating the current sense resistor found in traditional current mode PWMs.
Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs and enter diode emulation mode at light load condition.
The Buck conversion allows this device to directly step down high voltage batteries at the highest possible efficiency.
The pre-set frequency selections minimize design effort required for new designs.
The RT8237E is intended for CPU core, chipset, DRAM, or other low voltage supplies as low as 0.
7V.
The RT8237E is available in the WDFN-10L 3x3 package.
Features  Wide Input Voltage Range : 2.
7V to 26V  Output Voltage Range : 0.
7V to 3.
3V  Built-In 0.
5% 0.
7V Reference Voltage  Quick Load-Step Response within 100ns  4700ppm/°C Current Source for Current Limit RDS(ON)  Adjustable Current Limit with Low-Side MOSFET  4 Selectable Frequency Setting  Soft-Start Control  Drives Large Synchronous-Rectifier FETs  Integrated Boot Switch  Built-In OVP/OCP/UVP  Thermal Shutdown  Power Good Indicator  RoHS Compliant and Halogen Free Applications  Notebook Computers  CPU Core Supply  Chipset/RAM Supply as Low as 0.
7V  Generic DC-DC Power Regulator Simplified Application Circuit RT8237E VCC VCC BOOT PGOOD EN RF CS UGATE PHASE LGATE GND FB VIN VOUT Copyright ©2020 Richtek Technology Corporation.
All rights reserved.
DS8237E-02 October 2...


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