RT8292B
2A, 23V, 1.2MHz Synchronous Step-Down Converter
General Description
Features
z
1.5% High Accuracy Feedback Voltage
The RT8292B is a high efficiency, monolithic synchronous
step-down DC/DC converter that can deliver up to 2A
output current from a 4.5V to 23V input supply. The
RT8292B'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. The RT8292B also provides under
voltage protection and thermal shutdown protection. The
low current (<3μA) shutdown mode provides output
disconnction, enabling easy power management in
battery-powered systems. The RT8292B is available in a
SOP-8 (Exposed Pad) package.
z 4.5V to 23V Input Voltage Range
z 2A Output Current
z Integrated N-MOSFET Switches
z Current Mode Control
z Fixed Frequency Operation : 1.2MHz
z Adjustable Output from 0.8V to 15V
z Up to 95% Efficiency
z Programmable Soft-Start
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 Thermal Shutdown Protection
z RoHS Compliant and Halogen Free
Ordering Information
RT8292B
Applications
Package Type
z Wireless AP/Router
SP : SOP-8 (Exposed Pad-Option 1)
z Set-Top-Box
Lead Plating System
z Industrial and Commercial Low Power Systems
z LCDMonitors and TVs
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
z Green Electronics/Appliances
z Point of Load Regulation of High-PerformanceDSPs
H : UVP Hiccup
L : UVP Latch-Off
Pin Configurations
Note :
(TOP VIEW)
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.
8
BOOT
VIN
SS
2
3
4
7
6
5
EN
GND
SW
COMP
FB
9
GND
SOP-8 (Exposed Pad)
Marking Information
RT8292BxGSP
RT8292BxZSP
RT8292BxGSP : Product Number
RT8292BxZSP : Product Number
x : H or L
RT8292Bx
RT8292Bx
x : H or L
GSPYMDNN
ZSPYMDNN
YMDNN : Date Code
YMDNN : Date Code
DS8292B-03 March 2011
www.richtek.com
1