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TPS54974PWP 데이터시트(PDF) 3 Page - Texas Instruments

부품명 TPS54974PWP
상세설명  DUAL INPUT BUS (2.5V, 3.3V) 9-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
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TPS54974PWP 데이터시트(HTML) 3 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
TPS54974
SLVS458B – JANUARY 2003 – REVISED FEBRUARY 2005
T
J = –40°C to 125°C, VIN = 3 V to 4 V, PVIN = 2.2 V to 2.8 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE, VIN
Input voltage range, VIN
3.0
4.0
V
Supply voltage range, PVIN
Output = 1.8 V
2.2
2.5
4.0
V
fs = 350 kHz, RT open, PH pin open, PVIN = 2.5 V
6.3
10.0
VIN
mA
SHUTDOWN, SS/ENA = 0 V, PVIN = 2.5 V
1
1.4
I(Q)
Quiescent current
fs = 350 kHz, RT open, PH pin open, VIN = 3.3 V
4.0
7.0
mA
PVIN
SHUTDOWN, SS/ENA = 0 V, VIN = 3.3 V
<100
µA
UNDER VOLTAGE LOCKOUT (VIN)
Start threshold voltage, UVLO
2.95
3.0
V
Stop threshold voltage, UVLO
2.70
2.80
V
Hysteresis voltage, UVLO
0.14
0.16
V
Rising and falling edge deglitch, UVLO(1)
2.5
µs
BIAS VOLTAGE
Output voltage, VBIAS
I(VBIAS) = 0
2.70
2.80
2.90
V
Output current, VBIAS(2)
100
µA
CUMULATIVE REFERENCE
0.88
Vref Accuracy
0.891
0.900
V
2
REGULATION
Line regulation(1)(3)
IL = 4.5 A, fs = 350 kHz, TJ = 85°C
0.07
%/V
Load regulation(1)(3)
IL = 0 A to 9 A, fs = 350 kHz, TJ = 85°C
0.03
%/A
OSCILLATOR
Internally set—free-running frequency
RT open(1)
280
350
420
kHz
RT = 180 k
Ω (1% resistor to AGND)(1)
252
280
308
Externally set—free-running frequency range
RT = 100 k
Ω (1% resistor to AGND)
460
500
540
kHz
RT = 68 k
Ω (1% resistor to AGND)(1)
663
700
762
Ramp valley(1)
0.75
V
Ramp amplitude (peak-to-peak)(1)
1
V
Minimum controllable on time(1)
200
ns
Maximum duty cycle(1)
90%
(1)
Specified by design
(2)
Static resistive loads only
(3)
Specified by the circuit used in Figure 10.
3


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