AS1334-BTDT-18(2009) Ver la hoja de datos (PDF) - austriamicrosystems AG

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AS1334-BTDT-18
(Rev.:2009)

650mA, Ultra low Ripple Step Down DC/DC Converter

austriamicrosystems AG 

AS1334

Datasheet - Pin Assignments

4 Pin Assignments

Figure 2. Pin Configuration

FB 1

8 PGND

POK 2

EN 3

VDD 4

AS1334

SGND 9

7 SW

6 PVIN

5 SGND

Pin Descriptions

Table 1. Pin Descriptions

Pin Name

FB

POK

EN

VDD

SGND

PVIN

SW

PGND

Pin Number

1

2

3

4

5, 9

6

7

8

Description

Feedback Pin. Connect to the output at the output filter capacitor.

Power-OK.

0 = VOUT < 90% of VOUTNOM.

1 = VOUT > 90% of VOUTNOM.

Enable Input. Set this digital input high for normal operation. For shutdown,

set low.

+2.7V to +5.5V Power Supply Voltage. Analog Supply Input.

Analog and Control Ground.

+2.7V to +5.5V Power Supply Voltage. Input to the internal PFET switch.

Switch Pin. Switch node connection to the internal PFET switch and NFET

synchronous rectifier. Connect to an inductor with a saturation current rating

that exceeds the maximum switch peak current limit specification of the

AS1334.

Power Ground.

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Revision 1.04

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