®
RT7272A
3A, 36V, 500kHz Synchronous Step-Down Converter
General Description
Features
4.5V to 36V Input Voltage Range
The RT7272A is a high efficiency, current mode
synchronous step-downDC/DC converter that can deliver
up to 3A output current over a wide input voltage range
from 4.5V to 36V. The device integrates a 150mΩ high
side and a 80mΩ low side MOSFET to achieve high
conversion efficiency up to 95%. The current mode control
architecture supports fast transient response and simple
compensation circuit.
3A Output Current
Internal N-MOSFETs
Current Mode Control
Fixed Frequency Operation : 500kHz
Adjustable Output Voltage from 0.8V to 30V
High Efficiency Up to 95%
Stable with Low ESR Ceramic Output Capacitors
Cycle-by-Cycle Current Limit
Input Under Voltage Lockout
Output Under-Voltage Protection
Thermal Shutdown Protection
Adjustable Current Limit
A cycle-by-cycle current limit function provides protection
against shorted output and an internal soft-start eliminates
input current surge during start-up. The RT7272A provides
complete protection functions such as input under-voltage
lockout, output under-voltage protection, over-current
protection and thermal shutdown.
RoHS Compliant and Halogen Free
The RT7272Ais available in the thermal enhanced SOP-8
(Exposed Pad) package.
Applications
Distributed Power Systems
Pre-Regulator for Linear Regulators
Notebook Computers
Ordering Information
RT7272A
Point of Load Regulator in Distributed Power System
Digital Set-Top Boxes
Package Type
SP : SOP-8 (Exposed Pad-Option 2)
PersonalDigital Recorders
Broadband Communications
Flat Panel TVs and Monitors
Vehicle Electronics
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
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.
Simplified Application Circuit
V
IN
VIN
BOOT
RT7272A
C
IN
C
B
L
SW
V
OUT
Enable
EN
R1
R2
RLIM
C
OUT
FB
R
C
C
L
R
C
COMP
GND
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS7272A-07 November 2016
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
