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| 型號(hào)： | TPS55383PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, HTSSOP-26 |
| 文件頁(yè)數(shù)： | 34/45頁(yè) |
| 文件大?。?/td> | 1318K |
| 代理商： | TPS55383PWPRG4 |
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ELECTRICAL CHARACTERISTICS
SLUS818 – SEPTEMBER 2008 ......................................................................................................................................................................................... www.ti.com
–40°C
≤ TJ ≤ +125°C, VPVDD1 = VPVDD2 = 12 V, unless otherwise noted.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT SUPPLY (PVDD)
VPVDD1
Input voltage range
4.5
28
V
VPVDD2
IDDSDN
Shutdown
VEN1 = VEN2 = VPVDD2
70
150
A
IDDQ
Quiescent, non-switching
VFB = 0.9 V, Outputs OFF
1.8
3.0
mA
SW node unloaded; Measured as BP sink
IDDSW
Quiescent, while-switching
5
current
VUVLO
Minimum turn-on voltage
PVDD2 only
3.8
4.1
4.4
V
VUVLO(hys)
Hysteresis
400
600
mV
CBP = 10 F, EN1 and EN2 go low
tSTART
(1) (2)
Time from startup to softstart begin
2
ms
simultaneously
ENABLE (EN)
VEN1, VEN2
Enable threshold
0.9
1.2
1.5
V
Enable threshold hysteresis(1)
50
mV
IEN1. IEN2
Enable pull-up current
VEN1 = VEN2 = 0 V
6
12
A
tEN
(1)
Time from enable to soft-start begin
Other EN pin = GND
10
s
BP REGULATOR (BP)
BP
Regulator voltage
8 V < PVDD2 < 28 V
5
5.25
5.6
V
PVDD2 = 4.5 V; switching, no external load on
BPLDO
Dropout voltage
400
550
mV
BP
IBP
(1)
Regulator external load
2
mA
IBPS
Regulator short circuit
4.5 V < PVDD2 < 28 V
10
20
30
OSCILLATOR
TPS55383
255
310
375
fSW
Switching frequency
kHz
TPS55386
510
630
750
tDEAD
(1)
Clock dead time
140
ns
ERROR AMPLIFIER (EA) and VOLTAGE REFERENCE (REF)
0°C < TJ < +85°C
786
800
812
VFB1, VFB2
Feedback input voltage
mV
–40°C < TJ < +125°C
784
812
IFB1, IFB2
Feedback input bias current
3
50
nA
gM1, gM2
(1)
Error Amplifier transconductance
220
315
420
S
fp1, fp2
(1)
Error Amplifier dominant pole frequency
5
6
kHz
ISINK(COMP1),
Error Amplifier sink current capability
VFB1 = VFB2 = 0.9V, VCOMP = 2 V
15
30
40
A
ISINK(COMP2)
ISRC(COMP1),
Error Amplifier source current capability
VFB1 = VFB2 = 0.7V, VCOMP = 0 V
15
30
40
A
ISRC(COMP2)
SOFT START (SS)
TSS1, TSS2
Soft start time
1.5
2.1
2.7
ms
(1)
Ensured by design. Not production tested.
(2)
When both outputs are started simultaneously, a 20-mA current source charges the BP capacitor. Faster times are possible with a lower
BP capacitor value. More information can be found in the Input UVLO and Startup section.
4
Copyright 2008, Texas Instruments Incorporated
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