MIC2202 datasheet(9/18 Pages) MICREL

Part #	MIC2202

Description	HIGH EFFICIENCY 2MHZ SYNCHRONOUS BUCK CONVERTER 1UP STABLE PWM REGULATOR

PDF	18 Pages

Scroll/Zoom	100%

Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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9 / 18 page

May 2004

M9999-052104

MIC2202

Micrel

Synchronization

Sync_In allows the user to change the frequency from 2MHz

up to 2.5MHz or down to 1.6MHz. This allows the ability to

control the fundamental frequency and all the resultant har-

monics. Maintaining a predictable frequency creates the

ability to either shift the harmonics away from sensitive carrier

and IF frequency bands or to accurately filter out specific

harmonic frequencies.

10k

Ω

SYNC_IN

VIN

MIC2202

“Master”

SYNC_OUT

BIAS

SYNC_IN

VIN

MIC2202

“Slave”

SYNC_OUT

BIAS

Figure 4. Master-Slave Operation

TIME (400ns/div.)

Figure 5. Master-Slave Synchronization Waveforms

The Sync_Out function pin allows for the ability to be able to

sync up multiple MIC2202s in a “daisy-chain”, connecting

Sync_Out to Sync_In of the other MIC2202. Synchronizing

multiple MIC2202s benefits much in the same way as syncing

up one MIC2202. All regulators will run at the same funda-

mental frequency, resulting in matched harmonic frequen-

cies, simplifying designing for sensitive communication equip-

ment.

MIC2202 Datasheet(PDF) 9 Page - Micrel Semiconductor