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TPS40322 Datasheet(PDF) 4 Page - Texas Instruments

Part No. TPS40322
Description  Dual Output or Two-Phase Synchronous Buck Controller
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS40322 Datasheet(HTML) 4 Page - Texas Instruments

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TPS40322
SLUSAF8D – JUNE 2011 – REVISED JANUARY 2014
www.ti.com
ELECTRICAL CHARACTERISTICS
TJ = –40°C to 125°C, VVDD = 12 V, RRT = 40 kΩ, fSW = 500 kHz (unless otherwise noted),
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
INPUT SUPPLY
VDD
Input voltage range
3
20
V
IDDSDN
Shutdown
VENx/SSx = 0 V
200
250
µA
IDDQ
Quiescent, non-switching
VFB = 0.65 V, ENx/SSx float
6
8
mA
UVLO
UVLO
Minimum turn-on voltage
1.21
1.24
1.27
V
UVLOHYS
Hysteresis current
13
15
17
μA
BP REGULATOR
BP
Regulator voltage
7 V
≤ VVDD ≤ 20 V
6.2
6.5
6.8
V
VDO
Regulator dropout voltage
IBP = 25 mA, VVDD = 3 V
50
100
mV
IBP
Regulator continuous current limit(1)
100
mA
VBPUVLO
Regulator output UVLO
2.40
2.70
2.95
V
VBPUVLO-HYS
Regulator output UVLO hysteresis
180
210
250
mV
OSCILLATOR/ RAMP GENERATOR
100
1000
kHz
fSW
Oscillator frequency
RRT = 40 kΩ
450
500
550
kHz
VRAMP
Ramp amplitude (peak-to-peak)
3 V < VVDD < 20 V
VDD/8.5
V
VVAL
Valley voltage
0.85
V
fSYNC
SYNC frequency range
200
2000
kHz
tPW(sync)
SYNC input minimum pulse width
100
ns
VH(sync)
Rising edge threshold to set sync pulse
2
V
VL(sync)
Falling edge threshold to reset sync pulse
0.8
V
fMASTER
Master clock frequency
200
2000
kHz
Percent of master frequency for
–20%
20%
ΔfSYNC
synchronization
Master
0°/180° phase shift
0.5
V
VPHSET
Slave
0°/180° phase shift
0.6
2.0
V
Slave
90°/270° phase shift
2.1
V
PWM
PWM(off)
Minimum PWM off-time
90
130
ns
tON(min)
Minimum controllable pulse width
See (1)
90
ns
tDEAD
Output driver dead time
HDRV off to LDRV on
20
35
40
ns
tDEAD
Output driver dead time
LDRV off to HDRV on
20
35
40
ns
ERROR AMPLIFIER AND VOLTAGE REFERENCE
0°C < TJ < 70°C
597
600
603
mV
VFB
FB input voltage
–40°C < TJ < 125°C
594
600
606
IFB
FB input bias current
20
75
nA
GBWP
Unity gain bandwidth
See (1)
24
MHz
AVOL
Open loop gain
See (1)
80
dB
IOH
High-level output current
3
mA
IOL
Low-level output current
9
mA
(1)
Specified by design. Not production tested.
4
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Copyright © 2011–2014, Texas Instruments Incorporated


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