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TPS54319RTET Datasheet(PDF) 4 Page - Texas Instruments

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Part # TPS54319RTET
Description  2.95-V to 6-V Input, 3-A Output, 2-MHz, Synchronous Step-Down Switcher With Integrated FETs ( SWIFT??
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54319RTET Datasheet(HTML) 4 Page - Texas Instruments

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TPS54319
SLVSA83 – JUNE 2010
www.ti.com
ELECTRICAL CHARACTERISTICS
TJ = –40°C to 150°C, VIN = 2.95 to 6 V (unless otherwise noted)
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage
2.95
6
V
Internal under voltage lockout threshold
2.6
2.8
V
Shutdown supply current
EN = 0 V, 25°C, 2.95 V
≤ VIN ≤ 6 V
2
5
mA
Quiescent Current - Iq
VSENSE = 0.9 V, VIN = 5 V, 25°C, RT = 400 k
360
575
mA
ENABLE AND UVLO (EN PIN)
Enable threshold
Rising
1.25
V
Falling
1.18
Enable threshold + 50 mV
–4.6
Input current
mA
Enable threshold – 50 mV
–1.2
VOLTAGE REFERENCE (VSENSE PIN)
Voltage Reference
2.95 V
≤ VIN ≤ 6 V, 0°C <TJ < 85°C
0.802
0.827
0.852
V
MOSFET
BOOT-PH= 5 V
45
81
High side switch resistance
m
BOOT-PH= 2.95 V
64
110
VIN= 5 V
42
81
Low side switch resistance
m
VIN= 2.95 V
59
110
ERROR AMPLIFIER
Input current
7
nA
Error amplifier transconductance (gm)
–2 mA < I(COMP) < 2 mA, V(COMP) = 1 V
245
mmhos
Error amplifier transconductance (gm) during
–2 mA < I(COMP) < 2 mA, V(COMP) = 1 V,
79
mmhos
slow start
Vsense = 0.4 V
Error amplifier source/sink
V(COMP) = 1 V, 100 mV overdrive
+20
mA
–20
COMP to Iswitch gm
18
A/V
CURRENT LIMIT
Current limit threshold
3V
4.2
6.6
A
THERMAL SHUTDOWN
Thermal Shutdown
165
°C
Hysteresis
15
°C
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN)
Switching frequency range using RT mode
300
2000
kHz
Switching frequency
Rt = 400 k
400
500
600
kHz
Switching frequency range using CLK mode
300
2000
kHz
Minimum CLK pulse width
75
ns
RT/CLK voltage
R(RT/CLK)= 400k
0.5
V
RT/CLK high threshold
1.6
2.2
V
RT/CLK low threshold
0.4
0.6
V
RT/CLK falling edge to PH rising edge delay
Measure at 500 kHz with RT resistor in series
90
ns
PLL lock in time
Measure at 500 kHz
14
ms
4
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Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54319


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