RT9214
5V/12V Synchronous Buck PWM DC-DC Controller
General Description
The RT9214 is a high efficiency synchronous buck PWM
controllers that generate logic-supply voltages in PC based
systems. These high performance , single output devices
include internal soft-start, frequency compensation
networks and integrates all of the control, output
adjustment, monitoring and protection functions into a
single package.
The device operating at fixed 300kHz frequency provides
an optimum compromise between efficiency, external
component size, and cost.
Adjustable over-current protection (OCP) monitors the
voltage drop across the R
DS(ON)
of the lower MOSFET for
synchronous buck PWM DC-DC controller. The over-
current function cycles the soft-start in 4-times hiccup
mode to provide fault protection, and in an always hiccup
mode for under-voltage protection.
Features
Operating with 5V or 12V Supply Voltage
Drives All Low Cost N-Channel MOSFETs
Voltage Mode PWM Control
300kHz Fixed
Frequency Oscillator
Fast Transient Response :
High-Speed GM Amplifier
Full 0 to 100% Duty Ratio
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
RT9214
Package Type
S : SOP-8
SP : SOP-8 (Exposed Pad-Option 1)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
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
OPS
FB
VCC
SOP-8
BOOT
UGATE
GND
LGATE
2
3
4
NC
9
8
7
6
5
PHASE
OPS
FB
VCC
SOP-8 (
Exposed Pad
)
DS9214-13
September 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
