RT8253B Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – 3A, 23V, 1.2MHz Synchronous Step-Down Converter

RT8253B
3A, 23V, 1.2MHz Synchronous Step-Down Converter
General Description
Features
The RT8253B is a high-efficiency, monolithic synchronous
step-down DC/DC converter that can deliver up to 3A
output current from a 4.5V to 23V input supply. The
RT8253B's current mode architecture and external
compensation allow the transient response to be
optimized over a wide range of loads and output capacitors.
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 and thermal shutdown protection.
The low current (<3μA) shutdown mode provides output
disconnect, enabling easy power management in battery-
powered systems. The RT8253B is available in a
SOP-8 (Exposed Pad) package.
Ordering Information
RT8253B
±1.5% High Accuracy Feedback Voltage
4.5V to 23V Input Voltage Range
3A Output Current
Integrated N-MOSFET Switches
Current Mode Control
Fixed Frequency Operation : 1.2MHz
Adjustable Output from 0.8V to 20V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low-ESR Ceramic Output Capacitors
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Output Under Voltage Protection
Thermal Shutdown Protection
RoHS Compliant and Halogen Free
Applications
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
H : UVP Hiccup
L : UVP Latch-Off
Richtek products are :
External Storage Device
Wireless AP/Router
Set-Top-Box
Industrial and Commercial Low Power Systems
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation of High-Performance DSPs
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Pin Configurations
` Suitable for use in SnPb or Pb-free soldering processes.
(TOP VIEW)
Marking Information
RT8253B
xGSPYMDNN
RT8253BGSP : Product Number
x : H or L
YMDNN : Date Code
BOOT
VIN
SW
GND
8
2
7
GND
3
6
9
4
5
SS
EN
COMP
FB
SOP-8 (Expoaed Pad)
DS8253B-02 March 2011
www.richtek.com
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