Datasheet > MIC4576

MIC4576

更新时间： 2024-12-01 14:54:07

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
20页	644K
描述
The MIC4576 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode

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MIC4576 数据手册

MIC4576

200 kHz Simple 3A Buck Regulator

Features

General Description

• Fixed 200 kHz Operation

The MIC4576 is a series of easy-to-use ﬁxed and

adjustable BiCMOS step-down (buck) switch-mode

voltage regulators. The 200 kHz MIC4576 duplicates

the pinout and function of the 52 kHz LM2576. 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% maximum output voltage

- Adjustable version: ±2% maximum feedback

voltage

The MIC4576 is available in 3.3V, and 5V ﬁxed output

versions or a 1.23V to 33V adjustable output version.

Both versions are capable of driving a 3A load with

excellent line and load regulation.

• Guaranteed 3A Switch Current

• Wide 4V to 36V Input Voltage Range

• Wide 1.23V to 33V 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%

Typical)

• Standard Inductors are 25% of Typical LM2576

Inductor Values

In Shutdown mode, the regulator draws less than 200

µA shutdown 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

operate using

a standard series of inductors.

• Simple High-Efficiency Step-Down (Buck)

Regulator

Frequency compensation is provided internally.

The MIC4576 is available in TO-220 (T) and TO-263

(U) packages for the industrial temperature range.

• Efficient Preregulator for Linear Regulators

• On-Card Switching Regulators

• Positive-to-Negative Converter (Inverting

Buck-Boost)

Package Types

• Battery Charger

• Negative Boost Converter

SHDN

• Step-Down to 3.3V for Intel Pentium™ and Similar

Microprocessors

GND

_IN

5-Pin TO-220 (T)

SHDN

GND

_IN

5-Pin TO-263 (U)

See Table 2-1 for pin information.

 2019 Microchip Technology Inc.

DS20006158A-page 1

12 3 4 5 6 7...20

中文翻译

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与MIC4576相关器件

型号	品牌	获取价格	描述	数据表
MIC4576_06	MICREL	获取价格	200kHz Simple 3A Buck Regulator
MIC4576-3.3BT	MICREL	获取价格	200kHz Simple 3A Buck Voltage Regulator
MIC4576-3.3BT	MICROCHIP	获取价格	Switching Regulator, Voltage-mode, 8.5A, 220kHz Switching Freq-Max, BICMOS, PSFM5, TO-220,
MIC4576-3.3BU	MICROCHIP	获取价格	Switching Regulator, Voltage-mode, 8.5A, 220kHz Switching Freq-Max, BICMOS, PSSO5, TO-263,
MIC4576-3.3BU	MICREL	获取价格	200kHz Simple 3A Buck Voltage Regulator
MIC4576-3.3BUT&R	MICREL	获取价格	Switching Regulator, Voltage-mode, 8.5A, 220kHz Switching Freq-Max, BICMOS, PSSO5, TO-263,
MIC4576-3.3WT	MICREL	获取价格	200kHz Simple 3A Buck Regulator
MIC4576-3.3WU	MICREL	获取价格	200kHz Simple 3A Buck Regulator
MIC4576-3.3WUTR	MICROCHIP	获取价格	8.5A SWITCHING REGULATOR, 220kHz SWITCHING FREQ-MAX, PSSO5, ROHS COMPLIANT, TO-263, 5 PIN
MIC4576-3.3WU-TR	MICROCHIP	获取价格	8.5A SWITCHING REGULATOR, 220kHz SWITCHING FREQ-MAX, PSSO5

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