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AS1324

Data Sheet - P i n o u t a n d P a c k a g i n g

4 Pinout and Packaging

Pin Assignments

Figure 2. Pin Assignments (Top View)

Pin Descriptions

Table 2. Pin Descriptions

Pin

Number

Pin Name

Description

1EN

Enable Input. Driving this pin above 1.5V enables the device. Driving this pin below 0.3V

puts the device in shutdown mode. In shutdown mode all functions are disabled while SW

goes high impedance, drawing <1µA supply current.

Note: This pin should not be left floating.

2GND

Ground.

3SW

Switch Node Connection to Inductor. This pin connects to the drains of the internal main

and synchronous power MOSFET switches.

4VIN

Input Supply Voltage. This pin must be closely decoupled to GND with a

≥ 4.7µF ceramic

capacitor. Connect to any supply voltage between 2.7 to 5.5V.

5

VFB

Feedback Pin. This pin receives the feedback voltage from the external resistor divider

across the output. (Adjustable voltage variant only.)

VOUT

Output Voltage Feedback Pin. An internal resistor divider steps the output voltage down

for comparison to the internal reference voltage. (Fixed voltage variants only.)

5

VFB

AS1324

4VIN

2

GND

3

SW

1

EN

5

VOUT

AS1324-12/

AS1324-15/

AS1324-18

4VIN

2

GND

3

SW

1

EN