Datasheet > LTC3411A

LTC3411A

更新时间： 2023-12-20 18:46:08

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
22页	1404K
描述
1.25A、4MHz、同步降压型 DC/DC 转换器

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LTC3411A 数据手册

LTC3411A

1.25A, 4MHz, Synchronous

Step-Down DC/DC Converter

FEATURES

DESCRIPTION

The LTC^®3411A is a constant frequency, synchronous

step-down DC/DC converter. Intended for medium power

applications, it operates from a 2.5V to 5.5V input voltage

range and has a user configurable operating frequency up

to 4MHz, allowing the use of tiny, low cost capacitors and

inductors 1mm or less in height. The output voltage is

adjustable from 0.8V to 5.5V. Internal synchronous power

switches provide high efficiency. The LTC3411A’s current

mode architecture and external compensation allow the

transient response to be optimized over a wide range of

loads and output capacitors.

Uses Tiny Capacitors and Inductor

High Frequency Operation: Up to 4MHz

Low R

Internal Switches: 0.15Ω

DS(ON)

High Efficiency: Up to 96%

Selectable Low Ripple (25mV ) Burst Mode^®

Operation: I = 40µA

P-P

Stable with Ceramic Capacitors

Current Mode Operation for Excellent Line and Load

Transient Response

Short-Circuit Protected

Low Dropout Operation: 100% Duty Cycle

Low Shutdown Current: I ≤ 1µA

The LTC3411A can be configured for automatic power

saving Burst Mode operation (I = 40µA) to reduce gate

charge losses when the load current drops below the level

required for continuous operation. For reduced noise and

RF interference, the SYNC/MODE pin can be configured

to skip pulses or provide forced continuous operation.

Output Voltages from 0.8V to 5V

Synchronizable to External Clock

Supports Prebiased Outputs

Small 10-Lead 3mm × 3mm DFN or MSOP Package

APPLICATIONS

To further maximize battery life, the P-channel MOSFET

is turned on continuously in dropout (100% duty cycle).

In shutdown, the device draws <1µA.

Notebook Computers

Digital Cameras

Cellular Phones

Handheld Instruments

Board Mounted Power Supplies

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. patents, including 5481178, 6580258, 6498466, 6611131..

TYPICAL APPLICATION

Efficiency and Power Loss vs Output Current

Step-Down 2.5V/1.25A Regulator

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