RT9228 Просмотр технического описания (PDF) - Richtek Technology
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RT9228 Datasheet PDF : 8 Pages
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RT9228
Parameter
Symbol
Test Conditions
Reference and DAC
DAC (VID0-VID4) Input Low Voltage
DAC (VID0-VID4) Input High Voltage
DACOUT Voltage Accuracy
DACOUT = 2.05 ~ 3.50V
DACOUT Voltage Accuracy
DACOUT = 1.30 ~ 2.00V
Reference Voltage (Pin FB2 and FB3)
Linear Regulator
VREF
Regulation
Under-voltage Level
10mA < IVOUT2 < 150mA
FB2 Rising
Under-voltage Hysteresis
Over-current Protection
IOVP
Over-current Protection During Start-up
Linear Controller
Regulation
Under-voltage Level
VSEN3 = GATE3
0 < IGATE3 < 20mA
FB3 Rising
Under-voltage Hysteresis
Output Drive Current
VIN2 – VOUT3 > 1.5V
PWM Controller Error Amplifier
DC Gain
PWM Controller Gate Driver
UGATE Source
UGATE Sink
LGATE Source
LGATE Sink
Protection
VCC = 12V
RUGATE1 VCC - VUGATE1 = 1V
RUGATE1 VUGATE1 = 1V
VCC = 12V
ILGATE1 VLGATE1 = 2V
RLGATE1 VLGATE1 = 1V
VOUT1 Over-voltage Trip
FAULT Souring Current
OCSET1 Current Source
Soft-start Current
Power Good
IOVP
IOCSET
ISS
VSEN1 Rising
VFAULT = 8V
VOCSET1 = 4.5V
VSS = 1V
VOUT1 Upper Threshold
VOUT1 Under Voltage
VOUT1 Hysteresis (VSEN1/DACOUT)
PGOOD Voltage Low
VSEN1 Rising
VSEN1 Rising
Upper/Lower Threshold
VPGOOD IPGOOD = -4mA
Min Typ Max Units
--
--
0.8
V
2.0
--
--
V
-1
--
1
%
-1% -- 20mV -
1.240 1.265 1.290 V
-2.5
--
2.5
%
--
75 87
%
--
100
--
mV
180 230
--
mA
--
700
--
mA
-2.5
--
2.5
%
--
75 87
%
--
100
--
mV
20
40
--
mA
--
65
--
dB
--
3
7
Ω
--
3
7
Ω
--
1
--
A
--
2
6
Ω
112 115 120 %
10
14
--
mA
170 200 230 μA
--
11
--
μA
108 -- 112 %
89
--
95
%
--
2
--
%
--
--
0.5
V
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DS9228-06 March 2007
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