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TPS74801-Q1 Datasheet(PDF) 4 Page - Texas Instruments

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No. de pieza TPS74801-Q1
Descripción Electrónicos  1.5 A Low-Dropout Linear Regulator with Programmable Soft-Start
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS74801-Q1 Datasheet(HTML) 4 Page - Texas Instruments

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TPS74801-Q1
SLVSAI4A
– OCTOBER 2010 – REVISED FEBRUARY 2011
www.ti.com
ELECTRICAL CHARACTERISTICS
At VEN = 1.1V, VIN = VOUT + 0.3V, CBIAS = 0.1μF, CIN = COUT = 10μF, CNR = 1nF, IOUT = 50mA, VBIAS = 5.0V, and TA = –40°C to
+105
°C, unless otherwise noted. Typical values are at TJ = +25°C.
TPS74801-Q1
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN
Input voltage range
VOUT + VDO
5.5
V
VBIAS
Bias pin voltage range
2.7
5.5
V
VREF
Internal reference (Adj.)
TJ = +25°C
0.796
0.8
0.804
V
Output voltage range
VIN = 5V, IOUT = 1.5A
VREF
3.6
V
VOUT
2.97V
≤ VBIAS ≤ 5.5V,
Accuracy(1)
–2
±0.5
2
%
50mA
≤ IOUT ≤ 1.5A
VOUT/VIN
Line regulation
VOUT (NOM) + 0.3 ≤ VIN ≤ 5.5V
0.03
%/V
VOUT/IOUT
Load regulation
50mA
≤ IOUT ≤ 1.5A
0.09
%/A
IOUT = 1.5A,
60
165
mV
VIN dropout voltage
(2)
VBIAS – VOUT (NOM) ≥ 3.25V
(3)
VDO
VBIAS dropout voltage
(2)
IOUT = 1.5A, VIN = VBIAS
1.31
1.6
V
ICL
Current limit
VOUT = 80% × VOUT (NOM)
2.0
5.5
A
IBIAS
Bias pin current
1
2
mA
Shutdown supply current
ISHDN
VEN ≤ 0.4V
1
50
μA
(IGND)
IFB
Feedback pin current
–1
0.150
1
μA
1kHz, IOUT = 1.5A,
60
VIN = 1.8V, VOUT = 1.5V
Power-supply rejection
dB
(VIN to VOUT)
300kHz, IOUT = 1.5A,
30
VIN = 1.8V, VOUT = 1.5V
PSRR
1kHz, IOUT = 1.5A,
50
VIN = 1.8V, VOUT = 1.5V
Power-supply rejection
dB
(VBIAS to VOUT)
300kHz, IOUT = 1.5A,
30
VIN = 1.8V, VOUT = 1.5V
100Hz to 100kHz,
Noise
Output noise voltage
25
× VOUT
μVRMS
IOUT = 1.5A, CSS = 0.001μF
tSTR
Minimum startup time
RLOAD for IOUT = 1.0A, CSS = open
200
μs
ISS
Soft-start charging current
VSS = 0.4V
440
nA
VEN, HI
Enable input high level
1.1
5.5
V
VEN, LO
Enable input low level
0
0.4
V
VEN, HYS
Enable pin hysteresis
50
mV
VEN, DG
Enable pin deglitch time
20
μs
IEN
Enable pin current
VEN = 5V
0.1
1
μA
VIT
PG trip threshold
VOUT decreasing
85
90
94
%VOUT
VHYS
PG trip hysteresis
3
%VOUT
VPG, LO
PG output low voltage
IPG = 1mA (sinking), VOUT < VIT
0.3
V
IPG, LKG
PG leakage current
VPG = 5.25V, VOUT > VIT
0.1
1
μA
Operating ambient
TA
–40
+105
°C
temperature
Operating junction
TJ
–40
+125
°C
temperature
Shutdown, temperature increasing
+165
Thermal shutdown
TSD
°C
temperature
Reset, temperature decreasing
+140
(1)
Adjustable devices tested at 0.8V; resistor tolerance is not taken into account.
(2)
Dropout is defined as the voltage from VIN to VOUT when VOUT is 3% below nominal.
(3)
3.25V is a test condition of this device and can be adjusted by referring to Figure 8.
4
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© 2010–2011, Texas Instruments Incorporated
Product Folder Link(s): TPS74801-Q1


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