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AS1322

Datasheet - P i n A s s i g n m e n t s

4 Pin Assignments

Figure 2. Pin Assignments (Top View)

4.1 Pin Descriptions

Table 2. Pin Descriptions

Pin Number

Pin Name

Description

1

SW

short and wide as is practical to reduce EMI and voltage overshoot. If the inductor current

falls to zero, or pin SHDNN is low, an internal 100

Ω anti-ringing switch is connected from this

Note:

2

GND

Signal and Power Ground. Provide a short, direct PCB path between this pin and the

negative side of the output capacitor(s).

3

FB

error amplifier. Connect a resistor divider tap to this

4

SHDNN

Shutdown Pin. Logic controlled shutdown input.

1 = Normal operation, 1.2MHz typical operating frequency.

0 = Shutdown; quiescent current <1µA. If SHDNN is undefined, pin SW may ring.

Note:

Ω pull-up

resistor.

5

VOUT

Output Voltage Sense Input and Drain of the Internal PMOS Synchronous Rectifier.

6

VIN

series resistance of the supply.

1

SW

AS1322

2

GND

3

FB

6 VIN

5

VOUT

4 SHDNN