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Revision 1.03

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AS1353/AS1356

4 Pinout

Pin Assignments

Figure 2. Pin Assignments (Top View)

Pin Descriptions

Table 1. AS1353 Pin Descriptions

Pin Number

Pin Name

Description

1IN

LDO Input. Supply voltage can range from 2.5 to 5.5V. Bypass with a 1µF

capacitor to GND (see Capacitor Selection and Regulator Stability on page 10).

2

GND

Ground. This pin also functions as a heat sink. Solder to a large pad or the

circuit-board ground plane to maximize power dissipation.

3

SHDNM

Active-Low Shutdown Input. A logic low reduces the supply current to < 1µA.

Note: Connect to IN for normal operation.

4

BP

Reference-Noise Bypass. Bypass with a low-leakage, 0.01µF ceramic

capacitor for reduced noise at the output.

5

OUT

LDO Output. Fixed 1.5, 2.5, 2.7, 3.0, 3.3, and 3.6V output. Sources up to

150mA.

Table 2. AS1356 Pin Descriptions

Pin Number

Pin Name

Description

1IN

LDO Input. Input voltage can range from 2.5 to 5.5V. Bypass with 1µF to GND

(see Capacitor Selection and Regulator Stability on page 10).

2GND

Ground. This pin also functions as a heat sink. Solder to a large pad or the

circuit-board ground plane to maximize power dissipation.

3

SHDNM

Active-Low Shutdown Input. A logic low reduces the supply current to < 1µA.

Note: Connect to pin IN for normal operation.

4POK

Power-OK Output. Active-low, open-drain output indicates an out-of-regulation

condition. Connect a 100k

Ω pull-up resistor to pin OUT for logic levels.

Note: Leave this pin unconnected if the power-OK feature is not used.

5OUT

LDO Output. Fixed 1.5, 2.5, 2.7, 3.0, 3.3, and 3.6V output. Sources up to

150mA.

3

POK

2

1

5

4

OUT

GND

SHDNM

IN

3

BP

2

1

5

4

OUT

GND

SHDNM

IN

AS1356

AS1353