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TPS40222DRPRG4 Fiches technique(PDF) 3 Page - Texas Instruments

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No de pièce TPS40222DRPRG4
Description  1.6-A, 1.25-MHz BUCK CONVERTER IN A 3 mm 3 mm SON PACKAGE
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS40222DRPRG4 Fiches technique(HTML) 3 Page - Texas Instruments

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ELECTRICAL CHARACTERISTICS
TPS40222
SLUS642A – OCTOBER 2005 – REVISED JANUARY 2006
T
J = -40°C to 125°C, 4.5 ≤ VAVIN = VPVIN≤ 5.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
FEEDBACK VOLTAGE
TJ = 25°C, No load
792
800
808
VFB
Feedback voltage
mV
-40°C
≤ T
J≤ 125°C, No load,
788
812
4.5V
≤ V
DD≤ 7 V
IFB
Feedback input bias current
VFB = 0.9 V, VAVIN = VPVIN = 5 V
30
100
nA
SOFT-START
tSS
Soft-start time
VAVIN = VPVIN = 5 V
300
550
850
µs
Gm AMPLIFIER
Gm
Transconductance(1)
10
µS
GBW
Gain bandwidth product(1)
12
MHz
OSCILLATOR
fSW
Switching frequency
VFB > 0.7 V
1.00
1.25
1.50
MHz
fSWFB
Minimum foldback frequency
Startup/Overcurrent, VFB = 0 V
75
140
kHz
Foldback frequency slope(1)
0 V < VFB < 0.4 V
2200
Hz/mV
VFFB
Frequency foldback VFB threshold voltage(1)
0.4
0.6
V
OVERCURRENT DETECTION
ICL
Overcurrent threshold
VAVIN = VPVIN = 5 V
2.1
2.6
3.1
A
tON
Minimum on-time in overcurrent(1)
90
200
ns
HIGH SIDE MOSFET AND DRIVER
TJ = 25°C
250
RDS(on)
Drain-to-source on-resistance
m
-40°C
≤ T
J≤ 125°C
250
550
DMAX
Maximum duty cycle
90%
97%
ISWL
MOSFET SW leakage current
VPVIN = 10 V
-10
-30
µA
IBOOST
Boost current
ISW = 100 mA, VAVIN = VPVIN = 5 V
0.5
1.0
mA
Boost diode voltage drop
IDIODE ≤ 5 mA
0.9
V
UNDERVOLTAGE LOCKOUT (UVLO)
VON
Turn-on voltage
3.6
3.8
4.0
V
VHYST
Hysteresis voltage
0.4
IQ
AVIN quiescent current
1.0
1.5
mA
THERMAL SHUTDOWN
Thermal shutdown voltage(1)
150
°C
Thermal hysteresis(1)
-10
(1)
Ensured by design. Not production tested.
3


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