Datasheet > AS1339

AS1339

更新时间： 2024-02-01 02:35:29

品牌	Logo	应用领域
艾迈斯 - AMSCO		/
页数	文件大小	规格书
25页	4034K
描述
650mA RF Step-Down DC-DC for PA, with two LDOs

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AS1339 技术参数

生命周期：	Active	Reach Compliance Code：	unknown
风险等级：	5.75	Is Samacsys：	N
Base Number Matches：	1

AS1339 数据手册

AS1339

Datasheet - Pinout

4 Pinout

Figure 2. Pin Assignments (Top View)

AGND

REFIN

PGND

PA_EN

LDO2

EN2

IN2

TEST

IN1B

IN1A

LDO1

EN1

PAB

PAA

Pin Description

Table 1. Pin Description

Pin Name

Pin Number

Description

Not Connected. Free, high impedance for normal operation. Used for

internal test purpose.

Low-Noise Analog Ground

AGND

DAC-Controlled Input. Reference voltage for buck converter. The output of

the PA step-down converter is regulated to 2.5 x VREFIN. Bypass mode is

enabled when VIN ≤ 2.69V x VREFIN.

REFIN

PGND

LDO2

Power Ground for PA Step-Down Converter

10mA LDO Regulator 2 Output. Connect LDO2 with a 0.1μF ceramic

capacitor as close as possible to LDO2 and AGND. LDO2 is internally pulled

down through a 100Ω resistor when this regulator is disabled.

PA Step-Down Converter Enable Input. For normal operation, connect to

logic-high. For shutdown mode, connect to logic-low. The pin is internally

pulled down through a 110kΩ resistor.

PA_EN

Enable Input for LDO2. For normal operation, connect to logic-high. For

shutdown mode, connect to logic-low. The pin is internally pulled down

through a 110kΩ resistor.

EN2

Inductor Connection. Connect an inductor from LX to the output of the PA

step-down converter.

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