RT9224(2001) 데이터 시트보기 (PDF) - Richtek Technology

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RT9224
(Rev.:2001)

5-Bit Programmable Synchronous PWM Buck Converter Controller and Output Voltage Monitor

Richtek Technology 

RT9224

Parameter

Protection

Over-voltage Trip (VSEN/DACOUT)

OCSET Current Source

OVP Sourcing Current

Soft-Start Current

Power Good

Upper Threshold (VSEN/DACOUT)

Lower Threshold (VSEN/DACOUT)

Hysteresis (VSEN/DACOUT)

PGOOD Voltage Low

Function Block Diagram

Symbol

Test Conditions

Min Typ Max Units

IOCSET

IOVP

ISS

VOCSET = 4.5V

VSEN = 5.5V, VOVP = 0V

VSS = 1.5V

--

115 120

%

167 200 233 µA

60

--

--

mA

--

10

--

µA

VSEN Rising

106 -- 114 %

VSEN Falling

89

--

96

%

Upper and Lower Threshold --

2

--

%

VPGOOD IPGOOD = -5mA

--

0.5

--

V

VSEN

110%

90%

VCC

POWER-ON

RESET (POR)

PGOOD

OCSET

VID0

VID1

VID2

VID3

VID4

FB

115%

OVER-

VOLTAGE

REFERENCE

200µA

OVER-

CURRENT

SOFT-

START

4.5V

10µA

TTL D/A

CONVERTER

(DAC)

DACOUT

ERROR

AMP

INHIBIT

PWM

COMPARATOR

GATE

CONTROL

LOGIC

PWM

OSCILLATOR

OVP

SS

BOOT

UGATE

PHASE

LGATE

PGND

GND

DS9224-04 July 2001

www.richtek.com

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