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TPS54377 Datasheet(PDF) 4 Page - Texas Instruments

Part # TPS54377
Description  1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT??CONVERTER WITH DISABLED SINKING DURING START-UP
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54377 Datasheet(HTML) 4 Page - Texas Instruments

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TPS54377
SLVS779 – SEPTEMBER 2007
ELECTRICAL CHARACTERISTICS (continued)
TJ = –40°C to 125°C, VI = 3 V to 6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ERROR AMPLIFIER
Error amplifier open loop voltage gain
1 k
Ω COMP to AGND(4)
90
110
dB
Error amplifier unity gain bandwidth
Parallel 10 k
Ω, 160 pF COMP to AGND(4)
3
5
MHz
Error amplifier common-mode input
Powered by internal LDO(4)
0
VBIAS
V
voltage range
IIB
Input bias current, VSENSE
VSENSE = Vref
60
250
nA
Output voltage slew rate (symmetric),
VO
1
1.4
V/µs
COMP
PWM COMPARATOR
PWM comparator propagation delay
time, PWM comparator input to PH pin
10 mV overdrive(4)
70
85
ns
(excluding dead time)
SLOW-START/ENABLE
Enable threshold voltage, SS/ENA
0.82
1.2
1.4
V
Enable hysteresis voltage, SS/ENA (4)
0.03
V
Falling edge deglitch, SS/ENA (4)
2.5
µs
Internal slow-start time
2.6
3.35
4.1
ms
Charge current, SS/ENA
SS/ENA = 0 V
3
5
8
µA
Discharge current, SS/ENA
SS/ENA = 0.2 V, VI = 2.7 V
1.3
2.3
4
mA
POWER GOOD
Power good threshold voltage
VSENSE falling
90
%Vref
Power good hysteresis voltage (4)
3
%Vref
Power good falling edge deglitch (4)
35
µs
Output saturation voltage, PWRGD
I(sink) = 2.5 mA
0.18
0.3
V
Leakage current, PWRGD
VI = 5.5 V
1
µA
CURRENT LIMIT
VI = 3 V, output shorted
(4)
4
6.5
Current limit trip point
A
VI = 6 V, output shorted
(4)
4.5
7.5
Current limit leading edge blanking
100
ns
time(4)
Current limit total response time (4)
200
ns
THERMAL SHUTDOWN
Thermal shutdown trip point (4)
135
150
165
°C
Thermal shutdown hysteresis (4)
10
°C
OUTPUT POWER MOSFETS
VI = 6 V
59
88
m
rDS(on)
Power MOSFET switches
VI = 3 V
85
136
(4)
Specified by design
4
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Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS54377


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