L1923_11 Datasheet, PDF (4/7 Pages) Unisonic Technologies – 500mA HIGH PSRR LDO REGULATORS

L1923
Preliminary
CMOS IC
„ ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
V_IN to GND
-0.3~7
V
Output Short-Circuit Duration
Infinite
SET to GND
-0.3~7
V
SHDN to GND
-0.3~7
V
SHDN to IN
-7~0.3
V
OUT to GND
Power Dissipation (T_A=25°C)
Junction Temperature
Operating Temperature
Storage Temperature
P_D
T_J
T_OPR
T_STG
-0.3~(V_IN+0.3)
V
520
mW
150
°C
-40~85
°C
-65~160
°C
Notes: 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.
„ THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
Junction to Ambient
θ_JA
„ ELECTRICAL CHARACTERISTICS
240
°C/W
(V_IN =+3.6V, V_SHDN =V_IN, T_A =T_J =+25°C, unless otherwise specified.) (Note 1)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Input Voltage (Note 2)
Output Voltage Accuracy
Adjustable Output Voltage
Maximum Output Current
V_IN
V_OUT
V_OUT
Variation from specified V_OUT, I_OUT=1mA
(Note 3)
2.5
-2
V_SET
500
5.5 V
2
%
5.5 V
mA
Current Limit (Note 4)
Short Circuit Current
I_LIMIT
Isc
600 800
mA
120
mA
Ground Pin Current
I_Q
90 120 µA
Dropout Voltage (Note 5)
Line Regulation
Load Regulation
Ripple Rejection
Output Noise
SHUTDOWN
V_DROP
ΔV_LNR
ΔV_LDR
PSRR
Noise
I_OUT=250mA
I_OUT=500mA
SET=GND, V_IN=V_(STD)+0.1V~5.5V,
I_OUT=10mA
I_OUT= 10mA ~500mA
F=100Hz, 0.45V_P-P, I_OUT=10mA
F≤100kHz, I_OUT =0A
F≤100kHz, I_OUT =250mA
F≤100kHz, I_OUT =500mA
200
mV
400 500
0.06 0.12 %/V
0.02 0.1 %/mA
65
dB
136
238
µV
(RMS)
253
SHDN Input Threshold
SHDN Input Bias Current
Shutdown Supply Current
SET INPUT
V_IH
V_IL
I_SHDN
I_QSHDN
Regulator enabled
Regulator shutdown
V_SHDN= V_IN
V_OUT= 0V
T_A= +25°C
T_A= +25°C
1.5
0.4
V
0.003 0.1 µA
0.2 1
µA
SET Reference Voltage (Note 3)
SET Input Leakage Current
THERMAL PROTECTION
V_SET
I_SET
V_IN= 2.5V ~ 5.5V, T_A= +25°C
I_OUT= 1mA
T_A= T_MIN to T_MAX
V_SET= 1.3V (Note 3) T_A= +25°C
1.225 1.25 1.275
1.25
V
5
30
nA
Thermal Shutdown Temperature T_SHDN
145
°C
Thermal Shutdown Hysteresis ΔT_SHDN
25
°C
Notes: 1.Limits is 100% production tested at T_A= +25°C. Low duty pulse techniques are used during test to maintain
junction temperature as close to ambient as possible.
2.Guaranteed by line regulation test.
3.Adjustable mode only.
4.Not tested. For design purposes, the current limit should be considered 600mA minimum to 800mA
maximum.
5.The dropout voltage is defined as (V_IN-V_OUT) when V_OUT is 100mV below the target value of V_OUT.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-440.c