RT9287 Просмотр технического описания (PDF) - Richtek Technology
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RT9287 Datasheet PDF : 13 Pages
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Preliminary
RT9287
Par amete r
Dual LDO
Input Voltage
Dropout Voltage (Note 5)
Output Voltage Range
VLDO1,2 Accuracy
Line Regulation
Load Regulation
Current Limit
Quiescent Current
Shutdown Current
EN1,2 Threshold
Output Voltage TC
Sy mbol
Test Condition
Min Typ Max Units
V DD 1
VDD = 2.7V to 5.5V
2 .7
--
5.5
V
V DR OP
IOUT = 150mA
IOUT = 300mA
-- 120 --
mV
-- 240 --
mV
V LDO1,
V LDO2
1 .2
--
3.6
V
ΔV
IOUT = 1mA
−2
--
+2
%
VDD1 = (VLDO1,2 + 0.3V) to 5.5V
ΔVLINE or VDD1 > 2.7V, w hichever is
--
--
0.2
%
larger
ΔVLOAD 1mA < IOUT < 300mA
--
--
0.6
%
RLOAD = 1Ω
330 450 700 mA
IQ
VEN1, 2 > 1.5V
--
58
80
μA
ISHDN
VEN1, 2 < 0.4V
--
--
1
μA
V IH
VDD = 2.7V to 5.5V, Power On
1 .5
--
--
V
V IL
VDD = 2.7V to 5.5V, Shutdown
--
--
0.4
V
-- 100 -- ppm/°C
Thermal Shutdown
Thermal Shutdown Hysteresis
Thermal Shutdown Hysteresis
TSD
ΔTSD
ΔTSD
PSRR ILOAD = 10mA
PSRR ILOAD = 150mA
PSRR
f = 100Hz
f = 1kHz
f = 10kHz
f = 100Hz
f = 1kHz
f = 10kHz
-- 165 --
°C
--
40
--
°C
--
40
--
°C
--
65
--
dB
--
60
--
dB
--
50
--
dB
--
65
--
dB
--
50
--
dB
--
50
--
dB
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. Devices are ESD sensitive. Handling precaution recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard. The case point of θJC is on the expose pad for the WDFN package.
Note 5. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.
DS9287-01 August 2007
www.richtek.com
5
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