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TPS54617 Fiches technique(PDF) 3 Page - Texas Instruments

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No de pièce TPS54617
Description  3-V TO 6-V INPUT, 6-A, SMALL SYNCHRONOUS-BUCK SWITCHER WITH INTEGRATED FETs (SWIFT)
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

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PACKAGE DISSIPATION RATINGS
(1)
ELECTRICAL CHARACTERISTICS
TPS54617
www.ti.com ........................................................................................................................................... SLVS880A – NOVEMBER 2008 – REVISED JANUARY 2009
THERMAL IMPEDANCE
THERMAL IMPEDANCE
PACKAGE
JUNCTION-TO-AMBIENT
JUNCTION-TO-CASE
34-Pin RUV with solder
14.5°C/W
0.5 °C/W(2)
(1)
Test board conditions:
a. 3 inch × 3 inch, 4 layers, Thickness: 0.062 inch
b. 2.0 oz copper traces located on the top of the PCB
c. 2.0 oz copper ground plane on the bottom of the PCB
d. 2.0 oz copper ground planes on the 2 internal layers
e. 12 thermal vias
(2)
Maximum power dissipation may be limited by overcurrent protection.
TJ = –40°C to 125°C, VI = 3 V to 6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE, VIN
VIN input voltage range
3
6
V
fs = 350 kHz, SYNC ≤ 0.8 V, RT open, PH pin open
9.2
15.8
Quiescent current
fs = 550 kHz, SYNC ≥ 2.5 V, RT open, PH pin open
13.9
23.5
mA
Shutdown, SS/ENA = 0 V
1
1.4
UNDER VOLTAGE LOCK OUT
Start threshold voltage, UVLO
2.95
3.0
V
Stop threshold voltage, UVLO
2.70
2.80
Hysteresis voltage, UVLO
0.16
V
Rising and falling edge deglitch,
2.5
µs
UVLO(1)
BIAS VOLTAGE
Output voltage, VBIAS
I(VBIAS) = 0
2.70
2.80
2.90
V
VO
Output current, VBIAS(2)
100
µA
CUMULATIVE REFERENCE
Vref
Accuracy
0.882
0.891
0.900
V
REGULATION
IL = 3 A, fs = 350 kHz, TJ = 85°C
0.04
Line regulation(1)
%/V
IL = 3 A, fs = 550 kHz, TJ = 85°C
0.04
IL = 0 A to 6 A, fs = 350 kHz, TJ = 85°C
0.03
Load regulation(1)
%/A
IL = 0 A to 6 A, fs = 550 kHz, TJ = 85°C
0.03
OSCILLATOR
SYNC
≤ 0.8 V, RT open
280
350
420
Internally set free-running frequency
kHz
range
SYNC
≥ 2.5 V, RT open
440
550
660
RT = 100 k
Ω (1% resistor to AGND)
460
500
540
Externally set free-running frequency
kHz
range
RT = 27 k
Ω (1% resistor to AGND)
1480
1600
1720
High-level threshold voltage, SYNC
2.5
V
Low-level threshold voltage, SYNC
0.8
V
Pulse duration, SYNC(1)
50
Frequency range, SYNC
330
1600
kHz
Ramp valley(1)
0.75
V
Ramp amplitude (peak-to-peak)(1)
1
V
Minimum controllable on time
160
ns
Maximum duty cycle
90%
(1)
Specified by design
(2)
Static resistive loads only
Copyright © 2008–2009, Texas Instruments Incorporated
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