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| 型號： | TPS54810PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁數(shù)： | 15/21頁 |
| 文件大小： | 631K |
| 代理商： | TPS54810PWPRG4 |
TPS54810
SLVS420B MARCH 2002 R EVISED FEBRUARY 2005
www.ti.com
3
ELECTRICAL CHARACTERISTICS
TJ = 40°C to 125°C, VI = 4 V to 6 V unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE, VIN
Input voltage range, VIN
4.0
6.0
V
fs = 350 kHz, SYNC ≤ 0.8 V, RT open,
PH pin open
11
15.8
I(Q)
Quiescent current
fs = 550 kHz, SYNC ≥ 2.5 V, RT open,
PH pin open
16
23.5
mA
Shutdown, SS/ENA = 0 V
1.0
1.4
UNDER VOLTAGE LOCK OUT
Start threshold voltage, UVLO
3.8
3.85
V
Stop threshold voltage, UVLO
3.40
3.50
V
Hysteresis voltage, UVLO
0.14
0.16
V
Rising and falling edge deglitch, UVLO (1)
2.5
s
BIAS VOLTAGE
Output voltage, VBIAS
I(VBIAS) = 0
2.70
2.80
2.90
V
Output current, VBIAS (2)
100
A
CUMULATIVE REFERENCE
Vref
Accuracy
0.882
0.891
0.900
V
REGULATION
Line regulation(1) (3)
IL = 4 A, fs = 350 kHz, TJ = 85°C
0.04
%/V
Line regulation(1) (3)
IL = 4 A, fs = 550 kHz, TJ = 85°C
0.04
%/V
Load regulation(1) (3)
IL = 0 A to 8 A, fs = 350 kHz, TJ = 85°C
0.03
%/A
Load regulation(1) (3)
IL = 0 A to 8 A, fs = 550 kHz, TJ = 85°C
0.03
%/A
OSCILLATOR
Internally set free running frequency range
SYNC ≤ 0.8 V, RT open
280
350
420
kHz
Internally set—free running frequency range
SYNC ≥ 2.5 V, RT open
440
550
660
kHz
RT = 180 k (1% resistor to AGND)
252
280
308
Externally set—free running frequency range
RT = 100 k (1% resistor to AGND)
460
500
540
kHz
Externally set free running frequency range
RT = 68 k (1% resistor to AGND)
663
700
762
kHz
High level threshold, SYNC
2.5
V
Low level threshold, SYNC
0.8
V
Pulse duration, external sychronization, SYNC (1)
50
ns
Frequency range, SYNC (1)
330
700
kHz
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 9
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