®
RT7252A/B
2A, 17V, 340/800kHz Synchronous Step-Down Converter
General Description
The RT7252A/B is a high efficiency, monolithic
synchronous step-down DC/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.
Features
4V to 17V Input Voltage Range
2A Output Current
Internal N-MOSFETs
Current Mode Control
Fixed Frequency Operation : 340kHz/800kHz
Output Adjustable from 0.8V to 12V
Up to 95% Efficiency
Internal Compensation
Stable with Low ESR Ceramic Output Capacitors
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Output Under Voltage Protection
Output Over Voltage Protection
Power Good Indicator
Thermal Shutdown Protection
RoHS Compliant and Halogen Free
Ordering Information
RT7252A/B
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
A : 340kHz
B : 800kHz
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.
Applications
Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Pin Configurations
(TOP VIEW)
SW
VIN
BOOT
EN
2
3
4
8
NC
GND
PGOOD
FB
Marking Information
RT7252AZSP
RT7252AZSP : Product Number
GND
9
7
6
5
RT7252A
ZSPYMDNN
YMDNN : Date Code
SOP-8 (Exposed Pad)
RT7252BZSP
RT7252BZSP : Product Number
RT7252B
ZSPYMDNN
YMDNN : Date Code
Copyright
©
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS7252A/B-01 April 2012
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
