TPS54531_15 Datasheet, PDF (3/32 Pages) Texas Instruments – TPS54531 5-A, 28-V Input, Step-Down SWIFT™ DC-DC Converter With Eco-mode™

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6 Pin Configuration and Functions
TPS54531
SLVSBI5A – MAY 2013 – REVISED OCTOBER 2014
DDA Package
8-Pin SO With PowerPAD™
Top View
BOOT
VIN
EN
SS
1
8
2 _PowerPADTM 7
(Pin 9)
3
6
4
5
PH
GND
COMP
VSENSE
Pin Functions
PIN
I/O
DESCRIPTION
NO.
NAME
O A 0.1-μF bootstrap capacitor is required between the BOOT and PH pins. If the voltage on this
1
BOOT
capacitor falls below the minimum requirement, the high-side MOSFET is forced to switch off until the
capacitor is refreshed.
2
VIN
I This pin is the 3.5- to 28-V input supply voltage.
3
EN
I This pin is the enable pin. To disable, pull below 1.25 V. Float this pin to enable. Programming the
input undervoltage lockout with two resistors is recommended.
4
SS
I This pin is slow-start pin. An external capacitor connected to this pin sets the output rise time.
5
VSENSE
I This pin is the inverting node of the transconductance (gm) error amplifier.
6
COMP
O This pin is the error-amplifier output and the input to the PWM comparator. Connect frequency
compensation components to this pin.
7
GND
— Ground pin
8
PH
O The PH pin is the source of the internal high-side power MOSFET.
9
PowerPAD™
— For proper operation, the GND pin must be connected to the exposed pad.
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