• 简体中文
• English

MIC4574

The MIC4574 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200kHz MIC4574 duplicates the pinout and function of the 52kHz LM2574. The higher switching frequency may allow up to a 2:1 reduction in output filter inductor size.

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.

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%.

In shutdown mode, the regulator draws less than 200µA standby current. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions.

This series of simple switch-mode regulators requires a minimum number of external components and can operate using a standard series of inductors. Frequency compensation is provided internally.

The MIC4574 is available in DIP (N) packages for the industrial temperature range.

Documents

MIC4574 Data Sheet	Data Sheets	11/05/2015	456KB
Micrel AN 2 - 200kHz MIC4574/5/6 Family Design Guide	AppNote	09/29/2015	36KB
Micrel AN 83 - Practical Switching Regulator Circuits	AppNote	10/02/2015	442KB
MIC4574 Evaluation Board	User Guides	11/11/2015	42KB

RoHS Information

PartNumber	DeviceWeight	ShippingWeight	LeadCount	PackageType	PackageWidth	SolderComposition	JEDECIndicator	RoHS	ChinaEFUP
MIC4574-3.3YN	0.486700	0.900000	8	PDIP	.300in	Matte Tin	e3
MIC4574-5.0YN	0.486700	0.900000	8	PDIP	.300in	Matte Tin	e3
MIC4574YN	0.486700	0.900000	8	PDIP	.300in	Matte Tin	e3