Datasheet > AS1347

AS1347

更新时间： 2022-05-10 14:20:32

品牌	Logo	应用领域
艾迈斯 - AMSCO		转换器电池监控
页数	文件大小	规格书
16页	657K
描述
Dual Step-Down Converter with Battery Monitoring

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AS1347 数据手册

AS1346-49

Datasheet - Pin Assignments

4 Pin Assignments

Figure 2. Pin Assignments (Top View)

SW1

PVIN

EN1

FB1

12 SW2

PVIN

VDD

FB2

AS1346

EN2

LBO

AGND

LBI

4.1 Pin Descriptions

Table 2. Pin Descriptions

Pin Number

Pin Name

SW1

Description

Switch Node1 Connection to Inductor. This pin connects to the drains of the internal main and

synchronous power MOSFET switches.

Power Supply Connector. This pin must be closely decoupled to PGND with a  4.7μF ceramic

capacitor.

Enable1 Input. Driving this pin above 1.2V enables VOUT1. Driving this pin below 0.5V puts the device in

shutdown mode. In shutdown mode all functions are disabled, drawing 1μA supply current.

This pin should not be left floating.

Feedback Pin 1. Feedback input to the error amplifier, connect this pin to VOUT1. The output can be

factory set from 1.2V to 3.6V. For further information see Ordering Information on page 15.

Enable2 Input. Driving this pin above 1.2V enables VOUT2. Driving this pin below 0.5V puts the device in

shutdown mode. In shutdown mode all functions are disabled, drawing 1μA supply current.

This pin should not be left floating.

2, 11

PVIN

EN1

FB1

EN2

Low Battery Comperator Output. This open-drain output is low when:

- the voltage on LBI is higher than 1.2V or

LBO

- LBI is connected to GND and VOUT1 is below 92.5% of its nominal value.

Low Battery Comperator Input. 1.2V Threshold. May not be left floating. If connected to GND, LBO is

working as Output Power Okay for VOUT1.

LBI

AGND

FB2

Analog Ground.

Feedback 2 Pin. Feedback input to the error amplifier, connect this pin to VOUT2. The output can be

factory set from 1.2V to 3.6V. For further information see Ordering Information on page 15.

Supply Connector. Connect this pin to PVIN

VDD

SW2

Switch Node2 Connection to Inductor. This pin connects to the drains of the internal main and

synchronous power MOSFET switches.

Exposed Pad. The exposed pad must be connected to AGND. Ensure a good electrical connection to the

PCB to achieve optimal thermal performance.

PGND

www.ams.com/DC-DC_Step-Down

Revision 1.10

2 - 16

123 4 5 6 7...16

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