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TPS54495 Datasheet(PDF) 3 Page - Texas Instruments

No. de pieza TPS54495
Descripción Electrónicos  4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TPS54495 Datasheet(HTML) 3 Page - Texas Instruments

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TPS54495
www.ti.com
SLVSBH0A – JUNE 2012 – REVISED MAY 2013
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
VALUES
UNIT
MIN
MAX
Supply input voltage range
VIN1, VIN2
4.5
18
V
VBST1, VBST2
–0.1
24
VBST1, VBST2 (10ns transient)
–0.1
27
VBST1–SW1, VBST2–SW2
–0.1
5.7
Input voltage range
VFB1, VFB2
–0.1
5.7
V
EN1, EN2
–0.1
18
SW1, SW2
–1.0
18
SW1, SW2 (10ns transient)
–3
21
VREG5, SS1, SS2
–0.1
5.7
Output voltage range
PGND1, PGND2
–0.1
0.1
V
VO1, VO2
0.76
7.0
TA
Operating free-air temperature
–40
85
°C
TJ
Operating Junction Temperature
–40
150
°C
ELECTRICAL CHARACTERISTICS
(1)
over recommended free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
TA = 25°C, EN1 = EN2 = 5 V,
IIN
VIN supply current
1200
2000
µA
VFB1 = VFB2 = 0.8 V
IVINSDN
VIN shutdown current
TA = 25°C, EN1 = EN2 = L after H
15
20
µA
FEEDBACK VOLTAGE
VVFBTHLx
VFBx threshold voltage
TA = 25°C, CH1 = 3.3 V, CH2 = 1.5 V
758
765
773
mV
TCVFBx
Temperature coefficient
On the basis of 25°C(2)
–115
115
ppm/
IVFBx
VFBx Input Current
VFBx = 0.8 V, TA = 25°C
–0.4
0.2
0.4
µA
VREG5 OUTPUT
TA = 25°C, 6 V < VIN1 < 18 V,
VVREG5
VREG5 output voltage
5.5
V
IVREG = 5 mA
VIN1 = 6 V, VREG5 = 4.0 V,
IVREG5
Output current
75
mA
TA = 25°C
(2)
MOSFETs
rDS(on)H
High side switch resistance
TA = 25℃, VBSTx-SWx = 5.5 V
(2)
90
m
Ω
rDS(on)L
Low side switch resistance
TA = 25℃
(2)
60
m
Ω
ON-TIME TIMER CONTROL
TON1
SW1 On Time
SW1 = 12 V, VO1 = 1.2 V
165
ns
TON2
SW2 On Time
SW2 = 12 V, VO2 = 1.2 V
165
ns
TOFF1
SW1 Min off time
TA = 25℃, VFB1 = 0.7 V
(2)
220
ns
TOFF2
SW2 Min off time
TA = 25℃, VFB2 = 0.7 V
(2)
220
ns
SOFT START
ISSC
SSx charge current
VSSx = 0.5 V, TA = 25℃
–8.4
–8.0
–7.6
µA
TCISSC
ISSC temperature coefficient
On the basis of 25°C(2)
–5
4
nA/°C
ISSD
SSx discharge current
VSSx = 0.5 V
3
7
10
mA
(1)
x means either 1 or 2, that is VFBx means VFB1 or VFB2.
(2)
Specified by design. Not production tested.
Copyright © 2012–2013, Texas Instruments Incorporated
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