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RT9229
DS9229-03 July 2001
www.richtek-ic.com.tw
3
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Oscillator
Free Running Frequency
180
200
225
kHz
Ramp Amplitude
∆VOSC
--
1.9
--
VP-P
Linear Regulator
Regulation
10mA
< IVOUT2 < 150mA
-2.5
--
2.5
%
Under-voltage Level
FB4 Rising
--
75
87
%
Under-voltage Hysteresis
--
100
--
mV
Over-current Protection
IOVP
180
230
--
mA
Over-current Protection During Start-
up
--
700
--
mA
Linear Controller
Regulation
VSEN3 = GATE3
0
< IGATE3 < 20mA
-2.5
--
2.5
%
Under-voltage Level
FB3 Rising
--
75
87
%
Under-voltage Hysteresis
--
100
--
mV
Output Drive Current
VIN2 – VOUT3
> 1.5V
20
40
--
mA
PWM Controller Error Amplifier
DC Gain
--
65
--
dB
PWM Controller Gate Driver
UGATE 1 (and 2) Source
RUGATE
VCC = 12V
VCC - VUGATE = 1V
--
3
7
Ω
UGATE 1 (and 2) Sink
RUGATE VUGATE = 1V
--
3
7
Ω
LGATE Source
ILGATE1
VCC = 12V, VLGATE1 = 2V
--
1
--
A
LGATE Sink
RLGATE1 VLGATE1 = 1V
--
2
6
Ω
Protection
VOUT1 Over-voltage Trip
VSEN1 Rising
112
115
118
%
VOUT2 Over-voltage Trip
VSEN2 Rising
4.1
4.3
4.5
V
FAULT Souring Current
VFAULT = 8V
10
14
--
mA
OCSET1 (and 2) Current Source
IOCSET
VOCSET = 4.5VDC
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
90
--
94
%
VOUT1 Hysteresis (VSEN1/DACOUT)
Upper/Lower Threshold
--
2
--
%
PGOOD Voltage Low
VPGOOD IPGOOD = -4mA
--
--
0.5
V
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