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TPS40003DGQ Fiches technique(PDF) 3 Page - Texas Instruments

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No de pièce TPS40003DGQ
Description  LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
Download  20 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS40003DGQ Fiches technique(HTML) 3 Page - Texas Instruments

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TPS40000, TPS40001
TPS40002, TPS40003
TPS40004, TPS40005
SLUS507C − JANUARY 2002 − REVISED JUNE 2004
3
www.ti.com
ELECTRICAL CHARACTERISTICS
over recommended operating temperature range, TA = −40_C to 85_C, VDD = 5.0 V, all parameters measured at zero
power dissipation (unless otherwise noted)
input supply
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDD
Input voltage range
2.25
5.5
V
VHGATE High-side gate voltage
VBOOT − VSW
5.5
V
Shutdown current
SS/SD = 0 V,
Outputs off
0.25
0.45
IDD
Quiescent current
FB = 0.8 V
1.4
2.0
mA
IDD
Switching current
No load at HDRV/LDRV
1.5
4.0
mA
UVLO
Minimum on-voltage
1.95
2.05
2.15
V
Hysteresis
80
140
200
mV
oscillator
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
fOSC
Oscillator frequency
TPS40000
TPS40001
TPS40004
2.25 V
≤ VDD ≤ 5.00 V
250
300
350
kHz
fOSC
Oscillator frequency
TPS40002
TPS40003
TPS40005
2.25 V
≤ VDD ≤ 5.00 V
500
600
700
kHz
VRAMP Ramp voltage
VPEAK − VVALLEY
0.80
0.93
1.07
V
Ramp valley voltage
0.24
0.31
0.41
V
PWM
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Maximum duty cycle(2)
TPS40000
TPS40001
TPS40004
FB = 0 V,
VDD = 3.3 V
87%
94%
97%
Maximum duty cycle(2)
TPS40002
TPS40003
TPS40005
FB = 0 V,
VDD = 3.3 V
83%
93%
97%
Minimum duty cycle
0%
error amplifier
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VFB
FB input voltage
Line,
Temperature
0.689
0.700
0.711
V
VFB
FB input voltage
TA = 25°C
0.693
0.700
0.707
V
FB input bias current
30
130
nA
VOH
High-level output voltage
FB = 0 V,
IOH = 0.5 mA
2.0
2.5
V
VOL
Low-level output voltage
FB =VDD,
IOL = 0.5 mA
0.08
0.15
V
IOH
Output source current
COMP = 0.7 V,
FB = GND
2
6
mA
IOL
Output sink current
COMP = 0.7 V,
FB = VDD
3
8
mA
GBW
Gain bandwidth(1)
5
10
MHz
AOL
Open loop gain
55
85
dB
(1)
Ensured by design. Not production tested.
(2)
At VDD input voltage of 2.25 V, derate the maximum duty cycle by 3%.


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