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RT7291B

Richtek
Part Number RT7291B
Manufacturer Richtek
Description Synchronous Buck Converter
Published Mar 31, 2019
Detailed Description ® RT7291A/B 6A, 23V, 500kHz, ACOT® Synchronous Buck Converter with LDO for System 5V General Description The RT7291A/B...
Datasheet PDF File RT7291B PDF File

RT7291B
RT7291B

Overview
® RT7291A/B 6A, 23V, 500kHz, ACOT® Synchronous Buck Converter with LDO for System 5V General Description The RT7291A/B is a synchronous Buck converter with Advanced Constant On-Time (ACOT®) mode control.
The main control loop of the RT7291A/B uses an ACOT® mode control which provides a very fast transient response with no external compensators.
The RT7291A/B operates from 5V to 23V input voltage, provides a 5V LDO and a 300kHz CLK to drive an external charge pump.
OCP, UVP and OVP are included in the RT7291A/B.
This IC also provides a 1.
5ms internal soft-start function and an open-drain power good indicator.
Applications  Laptop Computers  Tablet PCs  Networking Systems  Servers  Personal Video Recorders  Flat Panel Television and Monitors  Distributed Power Systems Features  5V to 23V Input Voltage Range  Up to 98% Duty for 2S Battery Application  PWM Frequency Fixed 500kHz  ACOT® Mode Performs Fast Transient Response  Integrated MOSFETs  31mΩ of High-Side MOSFET  20mΩ of Low-Side MOSFET  Support Output MLCC Stable  Internal Soft-Start (1.
5ms typ)  Built-in OVP/UVP/OCP  Power Good Indicator  Fixed 300kHz VCLK to Support Charge Pump  Individual EN for PWM and LDO  Thermal Shutdown Simplified Application Circuit VOUT D1 D2 D3 C1 C2 C3 D4 C4 VCP C5 VIN VLDO VOUT CIN CLDO RBYP VIN EN LDO CLK BOOT RT7291A/B SW VOUT PGND CBYP VBYP PGOOD ENLDO AGND VCC RB CB L RPGOOD CVCC VOUT COUT VCC Copyright ©2020 Richtek Technology Corporation.
All rights reserved.
DS7291A/B-04 July 2020 is a registered trademark of Richtek Technology Corporation.
www.
richtek.
com 1 RT7291A/B Ordering Information RT7291A/B Package Type QUF : UQFN-16L 3x3 (FC) (U-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Output Voltage A : 5V B : 5.
1V Richtek products are :  RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020.
 Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurati...


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