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| LP3883_15 Datasheet, PDF (3/19 Pages) Texas Instruments – 3A Fast-Response Ultra Low Dropout Linear Regulators | |||
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LP3883
www.ti.com
SNVS223F â NOVEMBER 2002 â REVISED APRIL 2013
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
Typical(1) MIN(2)
MAX (2)
Units
VO
Output Voltage Tolerance
10 mA < IL < 3A
1.198
1.234
VO(NOM) + 1V ⤠VIN ⤠5.5V
1.216
4.5V ⤠VBIAS ⤠6V
1.186
1.246
1.478
1.522
1.5
V
1.455
1.545
ÎVO/ÎVIN
ÎVO/ÎIL
VDO
Output Voltage Line Regulation(3) VO(NOM) + 1V ⤠VIN ⤠5.5V
Output Voltage Load Regulation(4) 10 mA < IL < 3A
Dropout Voltage(5)
IL = 3A
1.773
1.827
1.8
1.746
1.854
0.01
%/V
0.04
0.06
%/A
210
270
420
mV
IQ(VIN)
Quiescent Current Drawn from VIN 10 mA < IL < 3A
Supply
3
7
8
mA
VS/D ⤠0.3V
0.03
1
30
µA
IQ(VBIAS)
Quiescent Current Drawn from
VBIAS Supply
10 mA < IL < 3A
VS/D ⤠0.3V
1
2
3
mA
0.03
1
30
µA
ISC
Short-Circuit Current
VOUT = 0V
6
A
Shutdown Input
VSDT
Output Turn-off Threshold
Output = ON
Output = OFF
0.7
1.3
V
0.7
0.3
Td (OFF)
Turn-OFF Delay
RLOAD X COUT << Td (OFF)
20
µs
Td (ON)
Turn-ON Delay
RLOAD X COUT << Td (ON)
15
IS/D
S/D Input Current
VS/D =1.3V
1
µA
VS/D ⤠0.3V
â1
AC Parameters
PSRR (VIN)
Ripple Rejection for VIN Input
Voltage
VIN = VOUT +1V, f = 120 Hz
80
VIN = VOUT + 1V, f = 1 kHz
65
PSRR (VBIAS) Ripple Rejection for VBIAS Voltage VBIAS = VOUT + 3V, f = 120 Hz
70
VBIAS = VOUT + 3V, f = 1 kHz
65
Output Noise Density
f = 120 Hz
1
dB
µV/rootâH
z
en
Output Noise Voltage
BW = 10 Hz â 100 kHz
150
VOUT = 1.8V
BW = 300 Hz â 300 kHz
90
µV (rms)
(1) Typical numbers represent the most likely parametric norm for 25°C operation.
(2) Limits are ensured through testing, statistical correlation, or design.
(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.
Copyright © 2002â2013, Texas Instruments Incorporated
Product Folder Links: LP3883
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