LR1108
CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage (Operating), (Note 10)
Input Voltage (Survival)
2.5~7.0
V
VIN
-0.3~+7.5
V
Shutdown Input Voltage
Output Voltage (Survival), (Note 4), (Note 5)
IOUT (Survival)
Maximum Voltage for ERROR Pin
Maximum Operating Current (DC)
VIN(SHDN)
VOUT
-0.3~VIN+0.3
V
-0.3~+7.5
V
Short Circuit Protected
VIN+0.3
V
1
A
Power Dissipation (Note 2)
PD
Internally Limited
Junction Temperature
TJ
+125
℃
Operating Temperature
TOPR
-40~+125
℃
Storage Temperature
TSTG
-65~+150
℃
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS
Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature
range.
(TJ = 25℃, VIN = VO(NOM) + 1V, IL = 10 mA, COUT = 2.2µF, VSD = VIN-0.3V, unless otherwise specified.)
PARAMETER
SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Tolerance (Note 6)
VOUT
0 mA ≤ IL ≤ 1A
VOUT +1 ≤ VIN≤ 7.0V
Output Voltage Line Regulation (Note 6) △VOUT VOUT+1V<VIN<7.0V
Output Voltage Load Regulation (Note 6) △VOUT/△IOUT 10 mA < IL < 1A
Dropout Voltage (Note 8)
VD
IL = 1A
Ground Pin Current In Normal Operation
Mode
IGND
IL = 0 mA
IL = 1A
Peak Output Current
IO(PEAK) (Note 2)
SHORT CIRCUIT PROTECTION
-1.5
-3
0
+1.5
+3
%
0.05
%
0.04
%
300 500 mV
200
uA
300
600 800
mA
Short Circuit Current
OVER TEMPERATURE PROTECTION
Shutdown Threshold
Thermal Shutdown Hysteresis
SHUTDOWN INPUT
ISC
TSHDN(THR)
TSHDN(HYS)
2
A
165
℃
10
℃
Shutdown Threshold
VSHDN
Output = High
Output = Low
VIN-0.3 VIN
V
0
0.2
Turn-off Delay
Turn-on Delay
SD Input Current
ERROR FLAG COMPARATOR
tD(OFF)
tD(ON)
ISD
IL = 1A
IL = 1A
VSD = VIN
20
µs
25
µs
1
nA
ERROR Flag Saturation
ERROR Flag Pin Leakage Current
Threshold
Threshold Hysteresis
Flag Reset Delay
AC PARAMETERS
VEF(SAT)
II(LEAK)
VT
VTHR
tD
ISINK = 100µA
(Note 7)
(Note 7)
0.02 0.1
V
1
nA
5
10
16
%
2
5
8
%
1
µs
Ripple Rejection
Output Noise Density
Output Noise Voltage
VIN = VOUT + 1.5V
60
PSRR COUT=100uF, VOUT = 3.3V
dB
VIN = VOUT + 0.3V
40
COUT=100uF, VOUT = 3.3V
ρn(l/f)
f = 120Hz
0.8
µV
eN
BW = 10Hz – 100kHz
BW = 300Hz – 300kHz
150
µVrms
100
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-031.B