®
RT7252A/B
2A, 17V, 340/800kHz Synchronous Step-Down Converter
General Description
Features
z 4V to 17V Input Voltage Range
The RT7252A/B is a high efficiency, monolithic
synchronous step-downDC/DC converter that can operate
at 340kHz/800kHz, while delivering up to 2A output current
from a 4V to 17V input supply. The RT7252A/B's current
mode architecture allows the transient response to be
optimized. Cycle-by-cycle current limit provides protection
against shorted outputs and soft-start eliminates input
current surge during start-up. Fault conditions also include
output under voltage protection, output over voltage
protection and thermal shutdown. The low current (<5μA)
shutdown mode provides output disconnection, enabling
easy power management in battery-powered systems. The
RT7252A/B is available in a SOP-8 (Exposed Pad)
package.
z 2A Output Current
z Internal N-MOSFETs
z Current Mode Control
z Fixed Frequency Operation : 340kHz/800kHz
z Output Adjustable from 0.8V to 12V
z Up to 95% Efficiency
z Internal Compensation
z Stable with Low ESR Ceramic Output Capacitors
z Cycle-by-Cycle Over Current Protection
z Input Under Voltage Lockout
z Output Under Voltage Protection
z Output Over Voltage Protection
z Power Good Indicator
z Thermal Shutdown Protection
z RoHS Compliant and Halogen Free
Ordering Information
RT7252A/B
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
Applications
z Industrial and Commercial Low Power Systems
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
z Computer Peripherals
z LCDMonitors and TVs
z Green Electronics/Appliances
z Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
A : 340kHz
B : 800kHz
Note :
Richtek products are :
Pin Configurations
` 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.
(TOP VIEW)
8
SW
VIN
NC
2
3
4
7
6
5
GND
PGOOD
FB
GND
Marking Information
RT7252AZSP
BOOT
EN
9
RT7252AZSP : Product Number
SOP-8 (Exposed Pad)
RT7252A
ZSPYMDNN
YMDNN : Date Code
RT7252BZSP
RT7252BZSP : Product Number
YMDNN : Date Code
RT7252B
ZSPYMDNN
Copyright 2012 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS7252A/B-01 April 2012
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
