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RT9206 Datasheet

  • RT9206

  • Step-down DC/DC Converter

  • 9頁(yè)

  • ETC

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Preliminary
RT9206
General Description
High Efficiency, Synchronous Buck with Dual Linear
Controllers
Features
Wide input range (5V to 28V)
0.8V internal reference
High efficiency Synchronous Buck topology
Integrate 2 linear controllers
Low cost N channel MOSFET design
Duty Cycle from 0% to 90%.
Adjustable switching frequency from 200kHz to
600kHz, Default 200KHz
Sense OCP by low side MOSFET R
DS(ON)
Power good signal output
The RT9206 is a low cost, combo power controller, which
integrates a synchronous step down voltage mode PWM
and 2 linear controllers. RT9206 directly drive external
N-channel MOSFET makes it easy to implement a high
efficiency and cost attractive power solution. Voltage
mode control loop and constant operation frequency with
external compensation network provide better stability
in wide operation range. Adjustable operation frequency
up to 600kHz can minimize the inductor value and PCB
board space. It is particularly suitable in wide input voltage
range (from 5V to 28V) and multi output applications.
Linear controller features in flexible linear power design,
delivered power can be simply decided by external N-
MOSFET鈥檚 selection. Output voltage level is chosen via
external resistor divider, 0.8V internal reference can
satisfied most of the chip鈥檚 requirement. Under voltage
lock-out provide cost effective protection of output.
RT9206 provides complete safety protection function: soft
start, over current protection, over voltage and under
voltage protection. Set current limit by choosing different
MOSFET and works in HICCUP mode as over current
occurs. Synchronous Buck control mode provides
excellent over voltage protection by turning on low side
MOSFET to prevent any damage of end device from
abnormal voltage stress as over voltage condition occurs.
Applications
LCD Monitor
Desk Note
IEEE1394 Client
Desktop IA
Broadband
Pin Configurations
TOP VIEW
LDRV1
VIN
LDRV2
LFB2
COMP
FB1
PG
SS/EN
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LFB1
BST
UG
PHS
VINT
LG
GND
RT
Ordering Information
RT9206
Package Type
S : SOP-16
Operating Temperature Range
C : Commercial Standard
SOP-16
DS9206-01 June 2003
1

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