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

Dual Step-Down Converter with Battery Monitoring

1 General Description

2 Key Features

High Efficiency: Up to 95%

Output Current: see Table 1

Input Voltage Range: 2.7V to 5.5V

The AS1346, AS1347, AS1348, AS1349 family is a high-efficiency,

constant-frequency dual buck converter available with fixed voltage

versions. The device provides two independent DC/DC Converters

with output currents between 0.5A and 1.2A. The wide input voltage

range (2.7V to 5.5V), automatic powersave mode and minimal

external component requirements make the AS134x family perfect

for SSD and many other battery-powered applications.

Output Voltage Range: 1.2V to 3.6V (available in 100mV steps)

Constant Frequency Operation: 2.0MHz

In shutdown mode the typical supply current decreases to ≤1μA.

The highly efficient duty cycle (100%) provides low dropout

operation, prolonging battery life in portable systems.

180º Out of Phase Operation

Low Battery Detection

An internal synchronous switching scheme increases efficiency and

eliminates the need for an external Schottky diode. The fixed

switching frequency (2.0MHz) allows the use of small surface mount

inductors.

Low Dropout Operation: 100% Duty Cycle

Shutdown Mode Supply Current: 1μA

No Schottky Diode Required

The integrated monitoring function can be configured that either the

output voltage (Power Okay function ) or the input voltage (Battery

Monitoring Function) can be supervised.

Output Disconnect in Shutdown

Non standard variants available within two weeks

12-Pin TDFN 3x3mm Package

Table 1. Available Products

Devices

AS1346

AS1347

AS1348

AS1349

IOUT1

1.2A

0.5A

1.2A

IOUT2

0.5A

3 Applications

0.5A

The device is ideal for SSD applications, mobile communication

devices, laptops and PDAs, ultra-low-power systems, threshold

detectors/discriminators, telemetry and remote systems, medical

instruments, or any other space-limited application with low power-

consumption requirements.

0.95A

1.2A

The AS1346-49 is available in a 12-Pin TDFN 3x3mm package.

Figure 1. AS1346 - Typical Application Diagram with POK Function

L1 = 3.3μH

VIN

VOUT1

3.3V 1200mA

2.7V to 5.5V

SW1

PVIN

COUT1

CIN

PVIN

FB1

AS1346

L2 = 3.3μH

VOUT2

1.8V 500mA

VDD

EN1

SW2

COUT2

FB2

POK Function

LBO

EN2

LBI

AGND

PGND

www.ams.com/DC-DC_Step-Down

Revision 1.10

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