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

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Part # TPS43350-Q1
Description  LOW IQ, DUAL SYNCHRONOUS BUCK CONTROLLER
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

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

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TPS43350-Q1
TPS43351-Q1
SLVSAR7B – JUNE 2011 – REVISED MAY 2012
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
Device operating range
Input voltage required for device on initial start-up
6.5
40
V
1.2
VIN
Buck regulator operating range after initial start-up
4
40
V
VIN falling
3.5
3.6
3.8
V
1.3
VIN UV
Buck undervoltage lockout
VIN rising
3.8
4
V
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
(1)
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
(1)
VIN = 13 V, BuckA, B: LPM
45
55
µA
Normal operation, SYNC = 5 V
VIN = 13 V, BuckA: CCM, BuckB: off
Quiescent current:
1.7
Iq_NRM
4.85
5.3
mA
TA = 25°C
(1)
VIN = 13 V, BuckB: CCM, BuckA: off
VIN = 13 V, BuckA, B: CCM
7
7.6
mA
Normal operation, SYNC = 5V
VIN = 13 V, BuckA: CCM, BuckB: off
Quiescent current:
1.8
Iq_NRM
5
5.5
mA
TA = 125°C
(1)
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 VIN - 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
0.800
0.808
V
Internal reference voltage in
4.2
Vref, NRM
normal mode
Internal tolerance on reference
–1%
1%
Measure FBX pin
0.784
0.800
0.816
V
Internal reference voltage in low
4.3
Vref, LPM
power mode
Internal tolerance on reference
–2%
2%
V sense for forward current limit in
Maximum sense voltage FBx = 0.75 V
4.4
60
75
90
mV
CCM
(low duty cycles)
Vsense
V sense for reverse current limit in
4.5
Minimum sense voltage FBx = 1 V
–65
–37.5
–23
mV
CCM
4.6
VI-Foldback
V sense for output short
Sense voltage in foldback 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
Duty cycle
Maximum duty cycle (digitally controlled)
98.75%
4.9
DCLPM
Duty cycle LPM
80%
(1)
Quiescent current specification is non-switching current consumption without including the current in the external feedback resistor
divider.
4
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Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): TPS43350-Q1 TPS43351-Q1


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