LM3495

更新时间： 2024-09-18 04:44:27

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器
页数	文件大小	规格书
26页	1111K
描述
Emulated Peak Current Mode Buck Controller for Low Output Voltage

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LM3495 数据手册

April 2006

LM3495

Emulated Peak Current Mode Buck Controller for Low

Output Voltage

General Description

Features

n Input voltage from 2.9V to 18V

n Output voltage adjustable from 0.6V to 5.5V

n Feedback Accuracy: 1%

The LM3495 is a PWM buck regulator which implements a

unique emulated peak current mode control. This control

method eliminates the switching noise which typically limits

current mode operation at extremely short duty cycles and

high operating frequency. The switching frequency is pro-

grammable between 200 kHz and 1.5 MHz, and can also be

synchronized to an external clock. The LM3495 is also very

fault tolerant with both switch node short, hiccup mode, and

adaptive duty cycle limit protection. A 0.6V 1% reference and

glitch free pre-biased start-up ensure the most demanding

digital loads operate reliably. Internal soft start and the ability

to track the output of another supply make the LM3495

versatile and efficient.

n Low-side Sensing, Programmable Current Limit without

sense resistor

n Input Under Voltage Lockout

n Hiccup mode current limit protection eliminates thermal

runaway during fault conditions

n Internal soft start with tracking capability

n 200 kHz to 1.5 MHz Switching frequency,

Synchronizable

n On-chip gate drivers

n Soft output discharge during shutdown

n Startup into output pre-bias

n Operation from a single input rail

n Adaptive Duty Cycle Limit

n TSSOP-16 package

Applications

n Wide input voltage buck converters with low voltage,

high accuracy outputs

n Core logic regulators

n High-efficiency buck regulation

Typical Application

20169901

DS201699

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