Preliminary
RT8101/A
12V Synchronous Buck PWM DC-DC
General Description
The RT8101/A are DC/DC synchronous buck PWM
controllers with embedded driver support up to 12V+12V
boot-strapped voltage for high efficiency power driving. The
parts are with full functions of voltage regulation, power
monitoring and protection into a single small footprint
packages SOP-8 and SOP-8 (Exposed Pad).
The RT8101/A apply a high-gain voltage mode PWM control
for simple application design. An internal 0.8V reference
allows the output voltage to be precisely regulated to low
voltage requirement. The parts are proposed with two type
including RT8101 and RT8101A with fixed operating
frequency of 300kHz and 600kHz respectively. Based on
the features that RT8101/A offered, the parts provide an
optimum solution between efficiency, total B.O.M. count,
and cost.
Features
Single 12V Bias Supply
Drives All Low Cost N-MOSFETs
High-Gain Voltage Model PWM Control
300kHz/600kHz Fixed Frequency Oscillator
Fast Transient Response :
High-Speed GM Amplifier
Full 0 to 100% Duty Ratio
External Compensation in the Control Loop
Internal Soft-Start
Adaptive Non-Overlapping Gate Driver
Over-Current Fault Monitor on MOSFET, No
Current Sense Resistor Required
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Graphic Card
Motherboard, Desktop Servers
IA Equipments
Telecomm Equipments
High Power DC-DC Regulators
Ordering Information
RT8101/A
Package Type
S : SOP-8
SP : SOP-8 (Exposed Pad)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
600kHz
300kHz
Note :
RichTek Pb-free and Green 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.
100% matte tin (Sn) plating.
Pin Configurations
(TOP VIEW)
BOOT
UGATE
GND
LGATE
2
3
4
8
7
6
5
PHASE
COMP
FB
VCC
SOP-8
BOOT
UGATE
GND
LGATE
2
3
4
GND
8
7
6
5
PHASE
COMP
FB
VCC
SOP-8(Exposed Pad)
DS8101/A-01 March 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
