參數(shù)資料
型號(hào)： TPS54383PWPR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 7 A DUAL SWITCHING CONTROLLER, 375 kHz SWITCHING FREQ-MAX, PDSO14
封裝： GREEN, PLASTIC, HTSSOP-14
文件頁(yè)數(shù)： 23/58頁(yè)
文件大小： 1773K
代理商： TPS54383PWPR
www.ti.com
ELECTRICAL CHARACTERISTICS
SLUS774B – AUGUST 2007 – REVISED OCTOBER 2007
–40
°C ≤ T
J ≤ +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
mV
CBP = 10 F, EN1 and EN2 go low
tSTART
(1) (2)
Time from startup to softstart begin
2
ms
simultaneously
ENABLE (EN)
VEN1
Enable threshold
0.9
1.2
1.5
V
VEN2
Hysteresis
50
mV
IEN1
Enable pull-up current
VEN1 = VEN2 = 0 V
6
12
A
IEN2
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
mV
BP
IBP
(1)
Regulator external load
2
mA
IBPS
Regulator short circuit
4.5 V < PVDD2 < 28 V
10
20
30
OSCILLATOR
TPS54383
255
310
375
fSW
Switching frequency
kHz
TPS54386
510
630
750
tDEAD
(1)
Clock dead time
140
ns
ERROR AMPLIFIER (EA) and VOLTAGE REFERENCE (REF)
VFB1
0
°C < T
J < +85°C
788
800
812
Feedback input voltage
mV
VFB2
–40
°C < T
J < +125°C
786
812
IFB1
Feedback input bias current
3
50
nA
IFB2
gM1
(1)
Transconductance
30
S
gM2
(1)
SOFT START (SS)
TSS1
Soft start time
1.5
2.1
2.7
ms
TSS2
OVERCURRENT PROTECTION
ICL1
Current limit channel 1
3.6
4.5
5.6
VILIM2 = VBP
3.6
4.5
5.6
A
ICL2
Current limit channel 2
VILIM2 = (floating)
2.4
3.0
3.6
VILIM2 = GND
1.15
1.50
1.75
VUV1
Low-level output threshold to declare a fault
Measured at feedback pin.
670
mV
VUV2
THICCUP
(1)
Hiccup timeout
10
ms
tON1(oc)
(1)
Minimum overcurrent pulse width
90
150
ns
tON2(oc)
(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.
Copyright 2007, Texas Instruments Incorporated
3
Product Folder Link(s): TPS54383 TPS54386
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