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TPS79418 Datasheet(PDF) 4 Page - Texas Instruments

Part # TPS79418
Description  ULTRALOW-NOISE, HIGH PSRR, FAST RF 250-mA LOW-DROPOUT LINEAR REGULATORS
PDF  15 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS79418 Datasheet(HTML) 4 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
TPS79401, TPS79418
TPS79425, TPS79428
TPS79430, TPS79433
SLVS349D – NOVEMBER 2001 – REVISED OCTOBER 2004
Over recommended operating temperature range (T
J = -40°C to 125°C), VEN = VIN, VIN = VOUT(nom) + 1 V
(1), I
OUT = 1mA,
C
OUT = 10µF, CNR = 0.01 µF, unless otherwise noted. Typical values are at 25°C.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN
Input voltage(1)
2.7
5.5
V
IOUT
Continuous output current
0
250
mA
VFB
Internal reference
TPS79401
TJ = 25°C
1.220
1.225
1.230
V
VOUT Output voltage range
TPS79401
VFB
5.5 - VDO
V
Accuracy(1)
VOUT + 1 V ≤ VIN ≤ 5.5 V 0 mA ≤ IOUT ≤ 250 mA
-3.0
+3.0
%
Output voltage line regulation
VOUT + 1 V < VIN ≤ 5.5 V
0.05
0.12
%/V
(
∆V
OUT%/∆VIN)
(1)
Load regulation (
∆V
OUT%/∆IOUT)
0 µA < IOUT < 250 mA
10
mV
TPS79428
IOUT = 250 mA
155
210
Dropout voltage(2)
TPS79430
IOUT = 250 mA
155
210
mV
VIN = VOUT(nom) - 0.1 V
TPS79433
IOUT = 250 mA
145
200
Output current limit
VOUT = 0 V
925
mA
Ground pin current
0 µA < IOUT < 250 mA
170
220
µA
Shutdown current(3)
VEN = 0 V
2.7 V < VIN < 5.5 V
0.07
1
µA
FB pin current
VFB = 1.8 V
1
µA
f = 100 Hz
IOUT = 250 mA
65
Power-supply ripple
TPS79428
f = 10 kHz
IOUT = 250 mA
60
dB
rejection
f = 100 kHz
IOUT = 250 mA
40
CNR = 0.001 µF
55
CNR = 0.0047 µF
36
BW = 100 Hz to 100
Output noise voltage (TPS79428)
µVRMS
kHz, IOUT = 250 mA
CNR = 0.01 µF
33
CNR = 0.1 µF
32
CNR = 0.001 µF
50
Time, start-up (TPS79428)
RL - 14 Ω, COUT = 1 µF
CNR = 0.0047 µF
70
µs
CNR = 0.01 µF
100
High-level enable input voltage
2.7 V < VIN < 5.5 V
1.7
VIN
V
Low-level enable input voltage
2.7 V < VIN < 5.5 V
0
0.7
V
EN pin current
VEN = 0
1
1
µA
UVLO threshold
VCC rising
2.25
2.65
V
UVLO hysteresis
100
mV
(1)
Minimum VIN is 2.7 V or VOUT + VDO, whichever is greater.
(2)
Dropout is not measured for the TPS79418 and TPS79425 since minimum VIN = 2.7 V.
(3)
For adjustable versions, this applies only after VIN is applied; then VEN transitions high to low.
4



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