Datasheet > AS1320_1

AS1320_1

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
艾迈斯 - AMSCO		转换器
页数	文件大小	规格书
12页	395K
描述
200mA Step-Up DC-DC Converter

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Data Sheet

AS1320

200mA Step-Up DC-DC Converter

1 General Description

2 Key Features

The AS1320 is a high-efficiency step-up DC-DC con-

verter designed to generate a fixed voltage of +3.3V.

ꢀ

Fixed Output Voltage: 3.3V

Output Current: Up to 200mA (@ 2V)

Internal Synchronous Rectifier

The AS1320 achieves an efficiency of up to 90%. The

minimum input voltage is 1.5V, the output voltage is

fixed at 3.3V, and output current is up to 200mA (@ 2V).

Requires No External Schottky Diode or FETs

Shutdown Mode Supply Current: Less Than 1µA

Efficiency: Up to 90%

In order to save power the AS1320 features a shutdown

mode, where it draws less than 1µA. In shutdown mode

the battery is connected directly to the output enabling

the supply of real-time-clocks.

The AS1320 provides a power-on reset output that goes

high-impedance when the output reaches 90% of its reg-

ulation point.

Minimum Input Voltage: +1.5V

Accurate Shutdown Low-Battery Cutoff Threshold

The SHDNN trip threshold of the AS1320 can be used

as an input voltage detector that disables the device

when the battery voltage falls to a predetermined level.

Battery Input Connected to Pin OUT in Shutdown

Mode for Backup Power

An internal synchronous rectifier is included, thus an

external transistor or Schottky diode is not required.

ꢀ

6-pin SOT23 Package

The AS1320 is available in a 6-pin SOT23 package.

3 Applications

The AS1320 is ideal for low-power applications where

ultra-small size is critical as in medical diagnostic equip-

ment, hand-held instruments, pagers, digital cameras,

remote wireless transmitters, cordless phones, and PC

cards.

The device is also perfect as a local 3.3V supply or as a

battery backup.

Figure 1. Application Diagram

+3.3V

Output

BATT

OUT

COUT

22µF

100kΩ

+1.5 to +3.5V

Battery

RESETN

Output

AS1320

10µH

RESETN

CIN

22µF

Off

SHDNN

GND

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