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TPS54331QDRQ1 Datasheet(PDF) 4 Page - Texas Instruments

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No. de pieza TPS54331QDRQ1
Descripción Electrónicos  3-A, 28-V INPUT, STEP-DOWN SWIFT??DC/DC CONVERTER WITH Eco-Mode?
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS54331QDRQ1 Datasheet(HTML) 4 Page - Texas Instruments

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background image
1
2
3
4
5
6
7
8
BOOT
VIN
EN
SS
PH
GND
COMP
VSENSE
TPS54331-Q1
SLVSAB5 – NOVEMBER 2010
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
TJ = –40°C to 150°C, VIN = 3.5V to 28V (unless otherwise noted)
DESCRIPTION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PULSE SKIPPING ECO-MODE™
Pulse skipping Eco-mode™ switch current threshold
160
mA
CURRENT LIMIT
Current limit threshold
VIN = 12 V
3.5
5.8
A
THERMAL SHUTDOWN
Thermal Shutdown
165
°C
SLOW START (SS PIN)
Charge current
V(SS) = 0.4 V
2
mA
SS to VSENSE matching
V(SS) = 0.4 V
10
mV
DEVICE INFORMATION
PIN ASSIGNMENTS
TERMINAL FUNCTIONS
TERMINAL
DESCRIPTION
NAME
NO.
BOOT
1
A 0.1 mF bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor falls below the
minimum requirement, the high-side MOSFET is forced to switch off until the capacitor is refreshed.
VIN
2
Input supply voltage, 3.5 V to 28 V.
EN
3
Enable pin. Pull below 1.25V to disable. Float to enable. Programming the input undervoltage lockout with two
resistors is recommended.
SS
4
Slow start pin. An external capacitor connected to this pin sets the output rise time.
VSENSE
5
Inverting node of the gm error amplifier.
COMP
6
Error amplifier output, and input to the PWM comparator. Connect frequency compensation components to this pin.
GND
7
Ground.
PH
8
The source of the internal high-side power MOSFET.
4
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Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54331-Q1


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