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| LP3882EMR-12 Datasheet, PDF (4/19 Pages) Texas Instruments – LP3882 1.5A Fast-Response Ultra Low Dropout Linear Regulators | |||
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LP3882
SNVS226F â MARCH 2003 â REVISED APRIL 2013
www.ti.com
ELECTRICAL CHARACTERISTICS
Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.
Unless otherwise specified: VIN = VO(NOM) + 1V, VBIAS = 4.5V, IL = 10 mA, CIN = COUT = 4.7 µF, VS/D = VBIAS.
Symbol
Parameter
Conditions
MIN (1)
Typical
(2)
MAX (1)
Units
VO
Output Voltage Tolerance
10 mA < IL < 1.5A
VO(NOM) + 1V ⤠VIN ⤠5.5V
4.5V ⤠VBIAS ⤠6V
ÎVO/ÎVIN
ÎVO/ÎIL
VDO
Output Voltage Line Regulation (3)
Output Voltage Load Regulation (4)
Dropout Voltage (5)
VO(NOM) + 1V ⤠VIN ⤠5.5V
10 mA < IL < 1.5A
IL = 1.5A (TO-220 and DDPAK/TO-263
only)
IL = 1.5A (PSOP only)
IQ(VIN)
Quiescent Current Drawn from VIN
Supply
10 mA < IL < 1.5A
VS/D ⤠0.3V
IQ(VBIAS)
Quiescent Current Drawn from VBIAS
Supply
10 mA < IL < 1.5A
VS/D ⤠0.3V
ISC
Short-Circuit Current
Shutdown Input
VOUT = 0V
VSDT
Output Turn-off Threshold
Output = ON
Output = OFF
Td (OFF)
Td (ON)
IS/D
Turn-OFF Delay
Turn-ON Delay
S/D Input Current
AC Parameters
RLOAD X COUT << Td (OFF)
RLOAD X COUT << Td (ON)
VS/D =1.3V
VS/D ⤠0.3V
PSRR (VIN)
PSRR
(VBIAS)
Ripple Rejection for VIN Input Voltage VIN = VOUT +1V, f = 120 Hz
VIN = VOUT + 1V, f = 1 kHz
Ripple Rejection for VBIAS Voltage VBIAS = VOUT + 3V, f = 120 Hz
VBIAS = VOUT + 3V, f = 1 kHz
Output Noise Density
f = 120 Hz
en
Output Noise Voltage
VOUT = 1.8V
BW = 10 Hz â 100 kHz
BW = 300 Hz â 300 kHz
1.198
1.186
1.216
1.234
1.246
1.478
1.455
1.5
1.522
1.545
V
1.773
1.746
1.8
1.827
1.854
0.01
%/V
0.04
0.06
%/A
110
170
270
mV
125
190
320
3
7
8
mA
0.03
1
30
µA
1
2
3
mA
0.03
1
30
µA
4.3
A
1.3
0.7
V
0.7
0.3
20
µs
15
1
µA
â1
80
65
dB
70
65
1
µV/Hz
150
µV (rms)
90
(1) Limits are specified through testing, statistical correlation, or design.
(2) Typical numbers represent the most likely parametric norm for 25°C operation.
(3) Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.
(4) 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.
(5) Dropout voltage is defined as the minimum input to output differential required to maintain the output with 2% of nominal value. The SO
PowerPad package devices have a slightly higher dropout voltage due to increased band wire resistance.
4
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