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| LP3874EMP-33 Datasheet, PDF (5/24 Pages) Texas Instruments – LP3871/LP3874 0.8A Fast Ultra Low Dropout Linear Regulators | |||
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www.ti.com
LP3871
LP3874
SNVS225G â FEBRUARY 2003 â REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS â LP3871/LP3874
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, IL = 10 mA, COUT = 10µF, VSD = 2V.
Symbol
Parameter
Conditions
Typ (1)
LP3871/4 (2)
Min
Max
Units
VO
Output Voltage Tolerance(3)
VOUT +1V ⤠VIN ⤠7.0V, 10 mA ⤠IL ⤠0.8A
0
-1.5
+1.5
-3.0
+3.0
%
ÎV OL
Output Voltage Line Regulation(3) VOUT + 1V ⤠VIN ⤠7.0V
0.02
0.06
%
ÎVO/ ÎIOUT
Output Voltage Load
Regulation (3)
10 mA ⤠IL ⤠0.8A
0.04
0.1
%
VIN - VOUT
Dropout Voltage (4)
IL = 80 mA
IL = 0.8A
24
35
40
mV
240
300
350
IGND
Ground Pin Current In Normal
Operation Mode
IL = 80 mA
IL = 0.8A
5
9
10
mA
6
14
15
IGND
Ground Pin Current In Shutdown
Mode
IO(PK)
Peak Output Current
Short Circuit Protection
VSD ⤠0.3V
-40°C ⤠TJ ⤠85°C
VO ⥠VO(NOM) - 4%
0.01
10
µA
50
1
A
ISC
Short Circuit Current
Shutdown Input
2.3
A
VSDT
Shutdown Threshold
Output = High
Output = Low
VIN
2
V
0
0.3
TdOFF
TdON
ISD
Error Flag(5)
VT
VTH
VEF(Sat)
Td
Turn-off delay
Turn-on delay
SD Input Current
Threshold
Threshold Hysteresis
Error Flag Saturation
Flag Reset Delay
IL = 0.8A
IL = 0.8A
VSD = VIN
(5)
(5)
Isink = 100µA
20
µs
25
µs
1
nA
10
5
16
%
5
2
8
%
0.02
0.1
V
1
µs
Ilk
Error Flag Pin Leakage Current
Imax
Error Flag Pin Sink Current
AC Parameters
VError = 0.5V
1
nA
1
mA
PSRR
Ïn(l/f)
en
Ripple Rejection
Output Noise Density
Output Noise Voltage
VIN = VOUT + 1V, COUT = 10µF,
VOUT = 3.3V, f = 120Hz
73
VIN = VOUT + 0.5V, COUT = 10µF,
VOUT = 3.3V, f = 120Hz
57
f = 120Hz
0.8
BW = 10Hz â 100kHz, VOUT = 2.5V
150
BW = 300Hz â 300kHz, VOUT = 2.5V
100
dB
µV
µV (rms)
(1) Typical numbers are at 25°C and represent the most likely parametric norm.
(2) Limits are specified by testing, design, or statistical correlation.
(3) Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage.
Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. The line
and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the
output voltage tolerance specification.
(4) Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value.
Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the drop-out voltage is
nothing but the input to output differential, since the minimum input voltage is 2.5V.
(5) Error Flag threshold and hysteresis are specified as percentage of regulated output voltage. See Application Hints.
Copyright © 2003â2013, Texas Instruments Incorporated
Product Folder Links: LP3871 LP3874
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