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LP38858 Datasheet, PDF (4/14 Pages) National Semiconductor (TI) – 1.5A Fast-Response High-Accuracy LDO Linear Regulator with Soft-Start
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Symbol
Parameter
Conditions
AC Parameters
PSRR
(VIN)
Ripple Rejection for VIN Input
Voltage
VIN = VOUT(NOM) + 1V,
f = 120 Hz
VIN = VOUT(NOM) + 1V,
f = 1 kHz
PSRR
(VBIAS)
Ripple Rejection for VBIAS Voltage
VBIAS = VOUT(NOM) + 3V,
f = 120 Hz
VBIAS = VOUT(NOM) + 3V,
f = 1 kHz
Output Noise Density
f = 120 Hz
en
Output Noise Voltage
VOUT = 1.8V
Thermal Parameters
BW = 10 Hz − 100 kHz
BW = 300 Hz − 300 kHz
TSD
Thermal Shutdown Junction
Temperature
TSD(HYS)
θJ-A
Thermal Shutdown Hysteresis
Thermal Resistance, Junction to
Ambient(Note 3)
TO220-5
TO263-5
Thermal Resistance, Junction to TO220-5
θJ-C
Case(Note 3)
TO263-5
MIN
TYP
MAX
Units
-
80
-
-
65
-
dB
-
58
-
-
58
-
-
1
-
µV/√Hz
-
150
-
-
90
-
µVRMS
-
160
-
°C
-
10
-
-
60
-
-
60
-
°C/W
-
3
-
-
3
-
Note 1: Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the
device is intended to be functional, but does not guarantee specific performance limits. For guaranteed specifications and conditions, see the Electrical
Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Test method is per JESD22-A114. The HBM rating for
device pin 1 (SS) is ±1.5 kV.
Note 3: Device power dissipation must be de-rated based on device power dissipation (PD), ambient temperature (TA), and package junction to ambient thermal
resistance (θJA). Additional heat-sinking may be required to ensure that the device junction temperature (TJ) does not exceed the maximum operating rating. See
the Application Information section for details.
Note 4: Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.
Note 5: Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from no load to full load.
Note 6: Dropout voltage is defined the as input to output voltage differential (VIN - VOUT) where the input voltage is low enough to cause the output voltage to
drop 2% from the nominal value.
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