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TPS43350-Q1 Datasheet(PDF) 4 Page - Texas Instruments

No. de pieza TPS43350-Q1
Descripción Electrónicos  LOW IQ, DUAL SYNCHRONOUS BUCK CONTROLLER
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS43350-Q1 Datasheet(HTML) 4 Page - Texas Instruments

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TPS43350-Q1
TPS43351-Q1
SLVSAR7D – JUNE 2011 – REVISED APRIL 2013
www.ti.com
DC ELECTRICAL CHARACTERISTICS
VIN = 8 V to 18 V, TJ = –40°C to 150°C (unless otherwise noted)
NO.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
1.0
Input Supply
1.1
VBat
Supply voltage
After initial start-up, condition is satisfied.
4
40
V
Input voltage required for device
6.5
40
V
on initial start-up
1.2
VIN
Buck regulator operating range
4
40
V
after initial start-up
VIN falling. After a reset, initial start-up conditions
3.5
3.6
3.8
V
may apply.(1)
1.3
VIN UV
Buck undervoltage lockout
VIN rising. After a reset, initial start-up conditions
3.8
4
V
may apply.(1)
VIN = 13 V, BuckA: LPM, BuckB: off
30
40
µA
LPM quiescent current:
1.5
Iq_LPM_
VIN = 13 V, BuckB: LPM, BuckA: off
TA = 25°C
(2)
VIN = 13 V, BuckA, B: LPM
35
45
µA
VIN = 13 V, BuckA: LPM, BuckB: off
40
50
µA
LPM quiescent current:
1.6
Iq_LPM
VIN = 13 V, BuckB: LPM, BuckA: off
TA = 125°C
(2)
VIN = 13 V, BuckA, B: LPM
45
55
µA
Normal operation, SYNC = High
VIN = 13 V, BuckA: CCM, BuckB: off
4.85
5.3
mA
Quiescent current:
1.7
Iq_NRM
TA = 25°C
(2)
VIN = 13 V, BuckB: CCM, BuckA: off
VIN = 13 V, BuckA, B: CCM
7
7.6
mA
Normal operation, SYNC = High
VIN = 13 V, BuckA: CCM, BuckB: off
5
5.5
mA
Quiescent current:
1.8
Iq_NRM
TA = 125°C
(2)
VIN = 13 V, BuckB: CCM, BuckA: off
VIN = 13 V, BuckA, B: CCM
7.5
8
mA
1.9
IBAT_sh
Shutdown current
BuckA, B: off, VBAT = 13 V
2.5
4
µA
2.0
Input Voltage - Overvoltage Lockout
VIN rising
45
46
47
V
2.1
VOVLO
Overvoltage shutdown
VIN falling
43
44
45
V
2.2
OVLOHys
Hysteresis
1
2
3
V
2.3
OVLOfilter
Filter time
5
µs
Gate Driver for PMOS
3.1
rDS(on)
PMOS OFF
10
20
Ω
3.2
IPMOS_ON
Gate current
VIN = 13.5 V, VGS = –5 V
10
mA
3.3
tdelay_ON
Turnon delay
C = 10 nF
5
10
µs
4.0
Buck Controllers
4.1
VBuckA/B
Adjustable output voltage range
0.9
11
V
Measure FBX pin
0.792
0.8
0.808
V
Internal reference voltage and
4.2
VREF, NRM
tolerance in normal mode
–1%
1%
Measure FBX pin
0.784
0.8
0.816
V
Internal reference voltage and
4.3
VREF, LPM
tolerance in low-power mode
–2%
2%
V sense for forward current limit in
4.4
FBx = 0.75 V (low duty cycles)
60
75
90
mV
CCM
VSENSE
V sense for reverse current limit in
4.5
FBx = 1 V
–65
–37.5
–23
mV
CCM
4.6
VI-Foldback
V sense for output short
FBx = 0 V
17
32.5
48
mV
4.7
tdead
Shoot-through delay, blanking time
100
ns
High-side minimum on-time
100
ns
4.8
DCNRM
Maximum duty cycle (digitally
98.75%
controlled)
4.9
DCLPM
Duty cycle LPM
80%
(1)
If VBAT and VREG remain adequate, the buck can continue to operate if VIN is > 3.8 V.
(2)
Quiescent current specification is non-switching current consumption without including the current in the external feedback resistor
divider.
4
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Product Folder Links: TPS43350-Q1 TPS43351-Q1


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