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TPS40009DGQR Datasheet(PDF) 4 Page - Texas Instruments

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No. de pieza TPS40009DGQR
Descripción Electrónicos  LOW-INPUT HIGH-EFFICIENCY SYNCHRNOUS BUCK CONTROLLER
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TPS40009DGQR Datasheet(HTML) 4 Page - Texas Instruments

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TPS40007
TPS40009
SLUS589B− NOVEMBER 2003 − REVISED FEBRUARY 2005
4
www.ti.com
ELECTRICAL CHARACTERISTICS
temperature range, TA = −40_C to 85_C, VDD = 5.0 V, TA = TJ; all parameters measured at zero power dissipation
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT DRIVER
RHDHI
HDRV pull-up resistance
VBOOT−VSW = 3.3 V,
ISOURCE = −100 mA
3
5.5
RHDLO HDRV pull-down resistance
VBOOT − VSW = 3.3 V,
ISINK = 100 mA
1.5
3
RLDHI
LDRV pull-up resistance
VDD = 3.3 V,
ISOURCE = −100 mA
3
5.5
RLDLO
LDRV pull-down resistance
VDD = 3.3 V,
ISINK = 100 mA
1.0
2.0
tRLD
LDRV rise time
15
35
tFLD
LDRV fall time
CLOAD = 1 nF
10
25
ns
tRHD
HDRV rise time
CLOAD = 1 nF
15
35
ns
tFHD
HDRV fall time
10
25
PREDICTIVE DELAY
VSWP
Sense threshold to modulate delay time
−350
mV
TLDHD
Maximum delay modulation range time
LDRV OFF − to − HDRV ON
45
70
95
Predictive counter delay time per bit
LDRV OFF − to − HDRV ON
2.8
4.3
6.2
ns
THDLD
Maximum delay modulation range
HDRV OFF − to − LDRV ON
50
80
110
ns
Predictive counter delay time per bit
HDRV OFF − to − LDRV ON
3.0
4.8
6.6
SHUTDOWN
VSD
Shutdown threshold voltage
Outputs OFF
0.21
0.26
0.31
V
VEN
Device active threshold voltage
0.25
0.29
0.35
V
SOFTSTART
ISS
Soft-start source current
Outputs OFF
2.0
3.7
5.4
µA
VSS
Soft-start voltage to begin VOUT start
0.35
0.65
0.95
V
BOOTSTRAP
RBOOT Bootstrap switch resistance
VDD = 3.3 V
50
100
RBOOT Bootstrap switch resistance
VDD = 5 V
35
70
VOUT PRE-BIAS
Recommended VOUT pre-bias level as
% of final regulation(1)(4)
FB percent of 700 mV
90%
SW NODE
ISW
Leakage current in shutdown
2
µA
THERMAL SHUTDOWN
tSD
Shutdown temperature(1)
165
°C
Restart from thermal shutdown(1)
−15
°C
(1)
Ensured by design. Not production tested.
(2)
Derate the maximum duty cycle by 3% for VDD < 3 V.
(3)
Operating at PWM on-times of less than 100 ns could lead to overlap between HDRV and LDRV pulses.
(4)
Prebiased output greater than 90% of final regulation may lead to sinking current from the prebias output.


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