AP7173 Datasheet, PDF (2/15 Pages) Diodes Incorporated – 1.5A LOW DROPOUT LINEAR REGULATOR WITH PROGRAMMABLE SOFT-START

Pin Assignments
( Top View )
AP7173
1.5A LOW DROPOUT LINEAR REGULATOR WITH
PROGRAMMABLE SOFT-START
( Top View )
IN ¹
IN ²
PG ³
VCC ⁴
EN ⁵
10 OUT
9 _OUT
8 FB
7 SS
6 _GND
DFN3030-10
IN
1
PG
2
VCC
3
EN
4
8
OUT
7
FB
6
SS
5
GND
SOP-8L-EP
Pin Descriptions
Pin
Name
IN
PG
VCC
EN
GND
SS
FB
OUT
Thermal Pad
PIN #
SOP-8L-EP
1
2
3
4
5
6
7
DFN3030-10
1, 2
3
4
5
6
7
8
Description
Power Input pin.
Power-Good pin, open-drain output. When the V_OUT is below the
PG threshold the PG pin is driven low; when the V_OUT exceeds the
threshold, the PG pin goes into a high-impedance state. To use the
PG pin, use a 10kΩ to 1MΩ pull-up resistor to pull it up to a supply of
up to 5.5V, which can be higher than the input voltage.
Bias Input pin, provides input voltage for internal control circuitry.
This voltage should be higher than the V_IN.
Enable pin. This pin should be driven either high or low and must not
be floating. Driving this pin high enables the regulator, while pulling it
low puts the regulator into shutdown mode.
Ground.
Soft-Start pin. Connect a capacitor between this pin and the ground
to set the soft-start ramp time of the output voltage. If no capacitor is
connected, the soft-start time is typically 100µS.
Feedback pin. Connect this pin to an external voltage divider to set
the output voltage.
8
9, 10
Regulated Output pin.
—
—
Solder this pad to large ground plane for increased thermal
performance.
AP7173 Rev. 4
2 of 15
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MARCH 2008
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