SM74503_15 Datasheet, PDF (4/14 Pages) Texas Instruments – SM74503 800mA Low-Dropout Linear Regulator

SM74503
SNVS722A – NOVEMBER 2011 – REVISED APRIL 2013
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SM74503 Electrical Characteristics (continued)
Typicals and limits appearing in normal type apply for T_J = 25°C. Limits appearing in Boldface type apply over the entire
junction temperature range for operation, −40°C to 125°C.
Symbol
Parameter
Conditions
Min
(1)
Typ
(2)
Max
(1)
Units
V_IN-V _OUT Dropout Voltage ⁽⁴⁾
I_OUT = 100mA
1.10
1.30
V
I_OUT = 500mA
1.15
1.35
V
I_OUT = 800mA
1.20
1.40
V
I_LIMIT
Current Limit
V_IN-V_OUT = 5V, T_J = 25°C
800
1200
1500
mA
Quiescent Current
SM74503-3.3
V_IN ≤ 15V
5
15
mA
SM74503-5.0
V_IN ≤ 15V
5
15
mA
Thermal Regulation
T_A = 25°C, 30ms Pulse
0.01
0.1
%/W
Ripple Regulation
f_RIPPLE =1 20Hz, V_IN-V_OUT = 3V V_RIPPLE =
60
75
dB
1V_PP
Temperature Stability
0.5
%
Long Term Stability
RMS Output Noise
Thermal Resistance
Junction-to-Case
T_A = 125°C, 1000Hrs
(% of V_OUT), 10Hz ≤ f ≤10kHz
4-Lead SOT-223
3-Lead PFM
0.3
0.003
15.0
10
%
%
°C/W
°C/W
Thermal Resistance
Junction-to-Ambient
No air flow)
4-Lead SOT-223 (No heat sink)
3-Lead PFM (No heat sink)⁽⁵⁾
136
°C/W
92
°C/W
(4) The dropout voltage is the input/output differential at which the circuit ceases to regulate against further reduction in input voltage. It is
measured when the output voltage has dropped 100mV from the nominal value obtained at V_IN = V_OUT +1.5V.
(5) Minimum pad size of 0.038in²
4
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