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RT9227A Datasheet(PDF) 3 Page - Richtek Technology Corporation

Part No. RT9227A
Description  Advanced PWM and Dual Fixed Linear Power Controller
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9227A Datasheet(HTML) 3 Page - Richtek Technology Corporation

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Preliminary
RT9227A
DS9227A-02 July 2001
www.richtek-ic.com.tw
3
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Linear Regulator
Regulation Voltage
VREG
10mA
< IVOUT2 < 150mA
2.437
2.500
2.563
V
Under-Voltage Level
FB2 Rising
--
1.875
2.175
V
Under-Voltage Hysteresis
--
100
--
mV
Over-Current Protection
180
230
--
mA
Over-Current Protection During Start-Up
--
700
--
mA
Linear Controller
Regulation Voltage
VREG
VSEN3 = GATE3
0
< IGATE3 < 20mA
1.462
1.500
1.538
V
Under-Voltage Level
FB3 Rising
--
1.125
1.305
V
Under-Voltage Hysteresis
--
100
--
mV
PWM Controller Error Amplifier
DC Gain
--
65
--
dB
PWM Controller Gate Driver
UGATE Source
RUGATE1
VCC = 12V
VCC - VUGATE1 = 1V
--
3
7
UGATE Sink
RUGATE1 VUGATE1 = 1V
--
3
7
LGATE Source
ILGATE1
VCC = 12V, VLGATE1 = 2V
--
1
--
A
LGATE Sink
RLGATE1 VLGATE1 = 1V
--
2
6
Protection
VOUT1 Over-Voltage Trip
VSEN1 Rising
112
115
120
%
FAULT Souring Current
VFAULT = 8V
10
14
--
mA
OCSET1 Current Source
IOCSET
VOCSET1 = 4.5V
170
200
230
µA
Soft-Start Current
ISS
VSS = 1V
--
11
--
µA
Power Good
VOUT1 Upper Threshold
VSEN1 Rising
108
--
112
%
VOUT1 Under Voltage
VSEN1 Rising
89
--
95
%
VOUT1 Hysteresis (VSEN1 / DACOUT)
Upper/Lower Threshold
--
2
--
%
PGOOD Voltage Low
VPGOOD IPGOOD = -4mA
--
--
0.5
V


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