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RT9227A Datasheet(PDF) 2 Page - Richtek Technology Corporation

Part No. RT9227A
Description  Advanced PWM and Dual Fixed Linear Power Controller
Download  10 Pages
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Maker  RICHTEK [Richtek Technology Corporation]
Homepage  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9227A Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT9227A
Preliminary
www.richtek-ic.com.tw
DS9227A-02 July 2001
2
Absolute Maximum Ratings
Supply Voltage
+15V
PGOOD and GATE Voltage
GND
−0.3V to VCC+0.3V
Input, Output or I/O Voltage
GND
− 0.3V to 7V
Ambient Temperature Range
0
°C to +70°C
Junction Temperature Range
0
°C to +125°C
Storage Temperature Range
-65
°C to +150°C
Lead Temperature (Soldering, 10 sec.)
300
°C
Package Thermal Resistance
SOP-24,
θJA
75
°C/W
Recommended Operating Conditions
Supply Voltage
+12V
±10%
Ambient Temperature Range
0
°C to 70°C
Junction Temperature Range
0
°C to 125°C
CAUTION:
Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress only rating and operation of the device at these or any other conditions above those
indicated in the operational sections of this specification is not implied.
Electrical Characteristics
(VCC = 12V, PGND = 0V, TA = 25
°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
VCC Supply Current
Nominal Supply Current
ICC
UGATE1, GATE3, LGATE1,
and VOUT2 Open
--
10
--
mA
Power-On Reset
VCC Rising Threshold
VOCSET1 = 4.5V
7.5
--
9.5
V
VCC Falling Threshold
VOCSET1 = 4.5V
7--
9
V
Rising VIN2 Under-Voltage Threshold
--
--
2.8
V
VIN2 Under-Voltage Hysteresis
--
0.5
--
V
Rising VOCSET1 Threshold
--
1.25
--
V
Oscillator
Free Running Frequency
180
200
225
KHz
Ramp Amplitude
∆VOSC
--
1.9
--
VP-P
Reference and DAC
DAC (VID0 – VID4) Input Low Voltage
--
--
0.8
V
DAC (VID0 – VID4) Input High Voltage
2.0
--
--
V
DACOUT Voltage Accuracy
DACOUT = 2.05 ~ 3.50V
-1
--
1
%
DACOUT Voltage Accuracy
DACOUT = 1.30 ~ 2.00V
-1%
--
20mV
--
To be continued


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