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| LP38855_15 Datasheet, PDF (4/20 Pages) Texas Instruments – 1.5A Fast-Response High-Accuracy LDO Linear Regulator with Enable | |||
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LP38855
SNVS461D â OCTOBER 2006 â REVISED APRIL 2013
www.ti.com
Electrical Characteristics (continued)
Unless otherwise specified: VIN = VOUT(NOM) + 1V, VBIAS = 3.0V, IOUT = 10 mA, CIN = COUT = 10 µF, CBIAS = 1µF, VEN = VBIAS.
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C
to +125°C. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent
the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
ENABLE Pin
IEN
ENABLE pin Current
VEN = VBIAS
VEN = 0.0V, VBIAS = 5.5V
-
0.01
-
-19
-13
-30
-40
-51
µA
VEN(ON)
Enable Voltage Threshold
VEN rising until Output = ON
1.00
0.90
1.25
1.50
1.55
V
VEN(HYS)
Enable Voltage Hysteresis
VEN falling from VEN(ON) until
Output = OFF
50
30
100
150
200
mV
tOFF
Turn-OFF Delay Time
tON
Turn-ON Delay Time
AC Parameters
RLOAD Ã COUT << tOFF
RLOAD Ã COUT << tON
-
20
-
µs
-
15
-
PSRR
(VIN)
PSRR
(VBIAS)
Ripple Rejection for VIN Input
Voltage
Ripple Rejection for VBIAS Voltage
Output Noise Density
VIN = VOUT +1V, f = 120 Hz
VIN = VOUT + 1V, f = 1 kHz
VBIAS = VOUT + 3V, f = 120 Hz
VBIAS = VOUT + 3V, f = 1 kHz
f = 120 Hz
-
80
-
dB
-
65
-
-
58
-
dB
-
58
-
-
1
-
µV/âHz
en
Output Noise Voltage
BW = 10 Hz â 100 kHz
BW = 300 Hz â 300 kHz
-
150
-
-
90
-
µVRMS
Thermal Parameters
TSD
TSD(HYS)
θJA
θJC
Thermal Shutdown Junction
Temperature
Thermal Shutdown Hysteresis
Thermal Resistance, Junction to
Ambient (4)
Thermal Resistance, Junction to
Case (4)
TO-220-5
DDPAK/TO-263-5
TO-220-5
DDPAK/TO-263-5
-
160
-
°C
-
10
-
-
60
-
-
60
-
°C/W
-
3
-
-
3
-
(4) Device power dissipation must be de-rated based on device power dissipation (TD), 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.
4
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Copyright © 2006â2013, Texas Instruments Incorporated
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