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LM3524DN/NOPB
Regulating Pulse Width Modulator 16-SOIC 0 to 80
LM2524D, LM3524D
www.ti.com SNVS766E –JUNE 2009–REVISED MAY 2013
LM2524D/LM3524D Regulating Pulse Width Modulator
Checkfor Samples: LM2524D, LM3524DThe LM3524D hasa ±1% precision 5V reference.
1FEATURESThe current carrying capability of the output drive
Fully Interchangeable With Standard LM3524 transistors has been raisedto 200 mA while reducing
Family VCEsat and increasing VCE breakdownto 60V. The
±1% Precision 5V Reference With Thermal common mode voltage rangeof the error-amp has
been raised to 5.5V to eliminate the need fora
Shut-Downresistive divider from the 5V reference.
• Output Currentto 200 mA DC the LM3524D the circuit bias line has been isolated
• 60V Output Capabilityfrom the shut-down pin. This prevents the oscillator
• Wide Common Mode Input Range for Error- pulse amplitude and frequency from being disturbed
Amp by shut-down. Alsoat high frequencies (≃300 kHz)
• One Pulse per Period (Noise Suppression) the max. duty cycle per output has been improvedto
44% compared to 35% max. duty cycle in other
• Improved Max. Duty Cycleat High Frequencies 3524s.
• Double Pulse Suppression addition, the LM3524D can now be synchronized
• Synchronize Through Pin3 externally, through pin 3. Alsoa latch has been
addedto insure one pulse per period evenin noisy
DESCRIPTION environments. The LM3524D includes double pulseThe LM3524D familyis an improved versionof the suppression logic that insures whena shut-downindustry standard LM3524. It has improved conditionis removed the stateof the T-flip-flop willspecifications and additional features yetis pinfor pin change only after the first clock pulse has arrived.compatible with existing 3524 families. New features This feature prevents the same output from beingreduce the need for additional external circuitry often pulsed twiceina row, thus reducing the possibilityofrequiredin the original version. core saturationin push-pull designs.
Connection Diagram
Figure1. Top View
See Package Number NFG
See Package NumberD
