RT9214 Datasheet, PDF (1/17 Pages) Richtek Technology Corporation – 5V/12V Synchronous Buck PWM DC-DC Controller

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.
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.
Features
z Operating with 5V or 12V Supply Voltage
z Drives All Low Cost N-Channel MOSFETs
z Voltage Mode PWM Control
z 300kHz Fixed Frequency Oscillator
z Fast Transient Response :
`High-Speed GM Amplifier
`Full 0 to 100% Duty Ratio
z Internal Soft-Start
z Adaptive Non-Overlapping Gate Driver
z Over-Current Fault Monitor on MOSFET, No
Current Sense Resistor Required
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Graphic Card
z Motherboard, Desktop Servers
z IA Equipments
z Telecomm Equipments
z High Power DC-DC Regulators
Pin Configurations
(TOP VIEW)
BOOT
UGATE
GND
LGATE
8
2
7
3
6
4
5
SOP-8
PHASE
OPS
FB
VCC
BOOT
UGATE
GND
LGATE
8
2
7
NC
3
96
4
5
PHASE
OPS
FB
VCC
SOP-8 (Exposed Pad)
DS9214-13 September 2007
www.richtek.com
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