SC174EVB View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
SC174EVB
Semtech Corporation
'SC174EVB' PDF : 27 Pages View PDF
SC174
Pin Descriptions (MLPD-10)
Pin #
1
2
3
4
5
6
7
Pin Name
BST
VIN
Pin Function
Bootstrap pin. A capacitor is connected between BST to LX to develop the floating voltage for the
high-side gate drive.
Power input supply voltage.
LX
Switching (Phase) node.
PGND
PGOOD
FB
Power ground.
Open-drain Power Good indicator. High impedance indicates power is good. An external pull-up
resistor is required.
Feedback input for switching regulator. Connect to an external resistor divider from the output to
program the output voltage.
EN/PSV
Tri-state pin. Enable input for switching regulator. Pull EN/PSV high to enable the part with power
save mode enabled. Connect EN/PSV to AGND to disable the switching regulator. Leave EN/PSV
floating to enable the IC in forced continuous conduction mode.
8
TON
On-time set input. Set the on-time by a series resistor to AGND.
9
AGND Analog Ground.
10
VDD
Input power for internal control circuit. Needs 1mF decoupling capacitor from this pin to AGND.
PAD
Thermal pad for heatsinking purposes. Connect to ground plane using multiple vias. Not con-
nected internally.
© 2010 Semtech Corporation
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