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TPS74401 Datasheet(PDF) 4 Page - Texas Instruments

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Part # TPS74401
Description  3.0A Ultra-Low Dropout Linear Regulator
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS74401 Datasheet(HTML) 4 Page - Texas Instruments

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BLOCK DIAGRAM
Thermal
Limit
Soft-Start
Discharge
OUT
V
OUT
FB
PG
IN
BIAS
SS
EN
Hysteresis
andDe-Glitch
Current
Limit
UVLO
0.73 A
m
0.8V
Reference
0.9V ´ V
REF
GND
C
SS
R
1
R
2
V
=0.8x(
)
OUT
1+
R
1
R
2
TPS74401
SBVS066D – DECEMBER 2005 – REVISED AUGUST 2006
Table 1. Standard 1% Resistor Values for Programming the Output Voltage(1)
R1 (kΩ)
R2 (kΩ)
VOUT (V)
Short
Open
0.8
0.619
4.99
0.9
1.13
4.53
1.0
1.37
4.42
1.05
1.87
4.99
1.1
2.49
4.99
1.2
4.12
4.75
1.5
3.57
2.87
1.8
3.57
1.69
2.5
3.57
1.15
3.3
(1)
VOUT = 0.8 × (1 + R1/R2)
Table 2. Standard Capacitor Values for Programming the Soft-Start Time(1)
CSS
SOFT-START TIME
Open
0.1ms
470pF
0.5ms
1000pF
1ms
4700pF
5ms
0.01
µF
10ms
0.015
µF
16ms
(1)
tSS(s) = 0.8 × CSS(F)/7.3 × 10–7
4
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