Datasheet > PAM2305AAB250

PAM2305AAB250

更新时间： 2024-11-08 05:59:31

品牌	Logo	应用领域
PAM		转换器
页数	文件大小	规格书
17页	502K
描述
1A Step-Down DC-DC Converters

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PAM2305AAB250 数据手册

PAM2305

1A Step-Down DC-DC Converters

Features

General Description

The PAM2305 is a step-down current-mode, DC-

DC converter. At heavy load, the constant-

frequency PWM control performs excellent

stability and transient response. To ensure the

longest battery life in portable applications, the

Efficiency up to 96%

Only 40μA(TYP.) Quiescent Current

Output Current: Up to 1A

Internal Synchronous Rectifier

1.5MHz Switching Frequency

Soft Start

Under-Voltage Lockout

Short Circuit Protection

Thermal Shutdown

PAM2305 provides

a power-saving Pulse-

Skipping Modulation (PSM) mode to reduce

quiescent current under light load operation to

save power.

5-pin Small SOT23-5, DFN2x2 6-Pin and

QFN3x3 16-Pin Packages

Pb-Free Package

The PAM2305 supports a range of input voltages

from 2.5V to 5.5V, allowing the use of a single

Li+/Li-polymer cell, multiple Alkaline/NiMH cell,

USB, and other standard power sources. The

output voltage is adjustable from 0.6V to the input

voltage, while the part number suffix PAM2305-

XX indicates pre-set output voltage of 3.3V, 2.8V,

2.5V, 1.8V, 1.5V, 1.2V or adjustable. All versions

employ internal power switch and synchronous

rectifierfor to minimize external part count and

realize high efficiency. During shutdown, the input

is disconnected from the output and the shutdown

current is less than 0.1μA. Other key features

include under-voltage lockout to prevent deep

battery discharge.

Applications

Cellular Phone

Portable Electronics

Wireless Devices

Cordless Phone

Computer Peripherals

Battery Powered Widgets

Electronic Scales

Digital Frame

The PAM2305 is available in SOT23-5, DFN2x2 6-

Pin and QFN3x3 16-Pin packages.

Typical Application

Fixed Output Voltage

Adjustable Output Voltage

V_IN

VIN SW

GND

VIN SW

10ꢀF

C_IN

10ꢀF

C_FW

C_IN

10ꢀF

GND

VOUT/FB

VOUT

/FB

= 0.6´ 1+

Power Analog Microelectronics,Inc

www.poweranalog.com

09/2008 Rev 1.2

12 3 4 5 6 7...17

中文翻译

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