Datasheet > MIC4574

MIC4574

更新时间： 2024-10-02 14:50:51

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
16页	549K
描述
The MIC4574 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode

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MIC4574 数据手册

MIC4574

0.5A, 200 kHz Buck Regulator

Features

General Description

• Fixed 200 kHz Operation

The MIC4574 is a series of easy to use fixed and

adjustable BiCMOS step-down (buck) switch-mode

voltage regulators. The 200 kHz MIC4574 duplicates

the pinout and function of the 52 kHz LM2574. The

higher switching frequency may allow up to a 2:1

reduction in output filter inductor size.

• 3.3V, 5V, and Adjustable Output Versions

• Voltage over Specified Line and Load Conditions:

- Fixed Version: ±3% Max. Output Voltage

- Adjustable Version: ±2% Max. Feedback

Voltage

The MIC4574 is available in 3.3V and 5V fixed output

versions or a 1.23V to 20V adjustable output version.

Both versions are capable of driving a 0.5A load with

excellent line and load regulation.

• Guaranteed 0.5A Switch Current

• Wide 4V to 24V Input Voltage Range

• Wide 1.23V to 20V Output Voltage Range

• Requires Minimum External Components

• <200 µA Typical Shutdown Mode

The feedback voltage is guaranteed to ±2% tolerance

for adjustable versions, and the output voltage is

guaranteed to ±3% for fixed versions, within specified

voltages and load conditions. The oscillator frequency

is guaranteed to ±10%.

• 75% Efficiency (Adjustable Version >75% typ.)

• Standard Inductors and Capacitors are 25% of

Typical LM2574 Values

In shutdown mode, the regulator draws less than

200 μA standby current. The regulator performs

cycle-by-cycle current limiting and thermal shutdown

for protection under fault conditions.

• Thermal Shutdown

• Overcurrent Protection

• 100% Electrical Thermal Limit Burn-In

This series of simple switch-mode regulators requires

a minimum number of external components and can

Applications

• Simple High-Efficiency Step-Down (Buck)

Regulator

operate using

a standard series of inductors.

Frequency compensation is provided internally.

• Efficient Pre-Regulator for Linear Regulators

• On-Card Switching Regulators

The MIC4574 is available in the DIP (N) package and

is rated over the industrial temperature range.

• Positive-to-Negative Converter (Inverting

Buck-Boost)

Package Type

• Isolated Flyback Converter using Minimum

External Components

MIC4574

8-Lead PDIP (N)

(Top View)

• Negative Boost Converter

SGND

SHDN

PGND

V_IN

 2020 Microchip Technology Inc.

DS20006472A-page 1

12 3 4 5 6 7...16

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与MIC4574相关器件

型号	品牌	获取价格	描述	数据表
MIC4574_05	MICREL	获取价格	200kHz Simple 0.5A Buck Regulator
MIC4574-12BN	MICROCHIP	获取价格	SWITCHING REGULATOR, 200kHz SWITCHING FREQ-MAX, PDIP8
MIC4574-15BWM	MICROCHIP	获取价格	Switching Regulator, Voltage-mode, 200kHz Switching Freq-Max, BICMOS, PDSO14, 0.300 INCH,
MIC4574-3.3BN	MICREL	获取价格	200kHz Simple 0.5A Buck Voltage Regulator
MIC4574-3.3BWM	MICREL	获取价格	200kHz Simple 0.5A Buck Voltage Regulator
MIC4574-3.3BWMT&R	MICREL	获取价格	Switching Regulator, Voltage-mode, 1.8A, 220kHz Switching Freq-Max, BICMOS, PDSO14, 0.300
MIC4574-3.3YN	MICREL	获取价格	200kHz Simple 0.5A Buck Regulator
MIC4574-5.0BN	MICREL	获取价格	200kHz Simple 0.5A Buck Voltage Regulator
MIC4574-5.0BWM	MICREL	获取价格	200kHz Simple 0.5A Buck Voltage Regulator
MIC4574-5.0BWMT&R	MICREL	获取价格	Switching Regulator, Voltage-mode, 1.8A, 220kHz Switching Freq-Max, BICMOS, PDSO14, 0.300

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