Datasheet > AS1322_13

AS1322_13

更新时间： 2022-06-13 04:26:42

品牌	Logo	应用领域
艾迈斯 - AMSCO		/
页数	文件大小	规格书
18页	827K
描述
Low Vol tage, Micropower, DC-DC Step-Up Conver ters

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AS1322_13 数据手册

AS1322

Low Voltage, Micropower, DC-DC Step-Up Converters

1 General Description

2 Key Features

ꢀ

95% Efficiency

The AS1322A and the AS1322B are synchronous, fixed frequency,

very high-efficiency DC-DC boost converters capable of supplying

3.3V at 150mA from a single AA-supply. Compact size and minimum

external parts requirements make these devices perfect for modern

portable devices.

Single-Cell Operation

Delivers 160mA @ 3.3V (from Single AA Cell)

Delivers 220mA @ 5.0V (from Two AA Cells)

Delivers 570mA @ 3.3V (from Two AA Cells)

Low Start-Up Voltage: 0.85V

High-speed switching frequency (1.2MHz) and internally

compensated PWM current mode design provide highly-reliable DC-

DC conversion, especially when driving white LEDs.

The converters are available as the standard products listed in Table

High-Speed Fixed-Frequency: 1.2MHz

Internal PMOS Synchronous Rectifier

Automatic Powersave Operation (AS1322A)

Continuous Switching at Light Loads (AS1322B)

Anti-Ringing Control Minimizes EMI

Logic Controlled Shutdown (< 1µA)

Output Range: 2.5 to 5.0V

Table 1. Standard Products

Model

Light Load Switching

Automatic Powersave Operation

Continuous Switching

AS1322A

AS1322B

The devices contain two internal MOSFET switches: one NMOS

switch and one PMOS synchronous rectifier.

Anti-ringing control circuitry reduces EMI by damping the inductor in

discontinuous mode, and the devices exhibit extremely low

quiescent current (< 1µA) in shutdown.

6-pin TSOT-23 Package

In shutdown mode the battery is connected to the output and VOUT

is held at approximately VIN - 0.6V.

3 Applications

The AS1322 is available in a 6-pin TSOT-23 package.

The AS1322 is ideal for low-power applications where ultra-small

size is critical as in medical diagnostic equipment, hand-held

instruments, pagers, digital cameras, remote wireless transmitters,

MP3 players, LCD bias supplies, cordless phones, GPS receivers,

and PC cards.

Figure 1. Typical Application Diagram – Single Cell to 3.3V

Synchronous Boost Converter

4.7µH

3.3V

OUT

AA Battery

160mA

OUT

10µF

1.02MΩ

AS1322

Off

SHDNN

604kΩ

GND

www.ams.com/DC-DC_Step-Up/AS1322

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型号	品牌	描述	获取价格	数据表
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AS1322B	AMSCO	Low Voltage, Micropower, DC-DC Step-Up Converters	获取价格
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AS1323_04	AMSCO	1.6Î¼A Quiescent Current, Single Cell, DC-DC	获取价格