LR1108 Datasheet, PDF (4/6 Pages) Unisonic Technologies – 1A FAST ULTRA LOW DROPOUT LINEAR REGULATOR

LR1108
CMOS IC
„ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage (Operating), (Note 10)
Input Voltage (Survival)
2.5~7.0
V
V_IN
-0.3~+7.5
V
Shutdown Input Voltage
Output Voltage (Survival), (Note 4), (Note 5)
I_OUT (Survival)
Maximum Voltage for ERROR Pin
Maximum Operating Current (DC)
V_IN(SHDN)
V_OUT
-0.3~V_IN+0.3
V
-0.3~+7.5
V
Short Circuit Protected
V_IN+0.3
V
1
A
Power Dissipation (Note 2)
P_D
Internally Limited
Junction Temperature
T_J
+125
Ċ
Operating Temperature
T_OPR
-40~+125
Ċ
Storage Temperature
T_STG
-65~+150
Ċ
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 T_J = 25°C, and limits in boldface type apply over the full operating temperature
range.
(T_J = 25Ċ, V_IN = V_O(NOM) + 1V, I_L = 10 mA, C_OUT = 2.2µF, V_SD = V_IN-0.3V, unless otherwise specified.)
PARAMETER
SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Output Voltage Tolerance (Note 6)
V_OUT
0 mA ≤ I_L ≤ 1A
V_OUT +1 ≤ V_IN≤ 7.0V
Output Voltage Line Regulation (Note 6) ¶V_OUT V_OUT+1V<V_IN<7.0V
Output Voltage Load Regulation (Note 6) ¶V_OUT/¶I_OUT 10 mA < I_L < 1A
Dropout Voltage (Note 8)
V_D
I_L = 1A
Ground Pin Current In Normal Operation
Mode
I_GND
I_L = 0 mA
I_L = 1A
Peak Output Current
I_O(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
I_SC
T_SHDN(THR)
T_SHDN(HYS)
2
A
165
Ċ
10
Ċ
Shutdown Threshold
V_SHDN
Output = High
Output = Low
V_IN-0.3 V_IN
V
0
0.2
Turn-off Delay
Turn-on Delay
SD Input Current
ERROR FLAG COMPARATOR
t_D(OFF)
t_D(ON)
I_SD
I_L = 1A
I_L = 1A
V_SD = V_IN
20
µs
25
µs
1
nA
ERROR Flag Saturation
ERROR Flag Pin Leakage Current
Threshold
Threshold Hysteresis
Flag Reset Delay
AC PARAMETERS
V_EF(SAT)
I_I(LEAK)
V_T
V_THR
t_D
I_SINK = 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
V_IN = V_OUT + 1.5V
60
PSRR ^{COUT=100uF, VOUT = 3.3V}
dB
V_IN = V_OUT + 0.3V
40
C_OUT=100uF, V_OUT = 3.3V
ρ_n(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.#