DC/DC Converter

Boost Type, Buck Type and Buck-Boost Type DC/DC converters are provided. Selection of output voltage, output current, switch frequency and PWM/PFM is available. Minimum input voltage is allowed 0.9V. And output voltage option is selectable 0.6V to 30.0V by 0.1V step.

PFM Step up

Part number	Feature	Starting voltage	Output voltage	Efficiency	Switching frequency	Package	Datasheet
ELM91series	PFM Step up DC/DC converter DC/DC controller	0.9V	1.8 to 5.5V	Typ 85%	Typ 100kHz	SOT-23 SOT-89 SC-70-5 (SOT-353)
ELM94series	PFM Step up	0.98V	2.5 to 5.5V	Typ 80%	Typ 35kHz	SOT-89
ELM93series	High efficiency PFM Step up	0.9V	1.8 to 3.8V	Typ 85%	Typ 100kHz	SOT-23 SOT-89

PWM Step up

Part number	Feature	Starting voltage	Output voltage/ Output current	Efficiency	Switching frequency	Package	Datasheet
ELM95series	PWM Step up	0.9V	2.5 to 5.5V 0.1A	Typ 85%	Typ 55kHz Typ 100kHz	SOT-89 SOT-23
ELM92series	CE High output current PWM Step up	0.9V	2.5 to 5.5V 0.3A	Typ 85%	Typ 600kHz	SOT-89 SOT-89-5
ELM620BA	High efficiency synchronous PWM Step up DC/DC converter	0.9V	2.5 to 6.0V 0.5A	Max 96%	Typ 1.4MHz	SOT-26
ELM621LA	Step up DC/DC converter	2.5V	2.7 to 30.0V 0.5A	Max 90%	Typ 1.3MHz	TSOT-25
ELM623FA	Synchronous PWM Step up DC/DC converter	2.7V	3.0 to 18.0V 10A	Max 93%	Typ 460kHz	QFN20-4×4
ELM624BA	high efficiency synchronous PWM Step up DC/DC converter	0.9V	2.5 to 5.5V 0.2A	Max.92%	Typ.800kHz	SOT-26 (Show datasheet)

PWM Step down

Part number	Feature	Supply voltage range	Output voltage/ Output current	Efficiency	Switching frequency	Package	Datasheet
ELM600xB	high efficiency synchronous PWM Step down DC/DC converter	2.5 to 5.5V	0.6V to 5.5V 1A	Max 95%	Typ 1.5MHz	DFN6-2x2 TSOT-25
ELM603GC	COT control high efficiency synchronous PWM Step down DC/DC converter	2.5 to 6.0V	0.6V to Vin 1.5A	Max.95%	Typ.1.5MHz	DFN6-2x2
ELM604PA	High efficiency dual synchronous PWM Step down DC/DC converter	2.5 to 6.0V	0.8Ax2	Max 95%	Typ 1.4MHz	TDFN10-3x3
ELM613xDC	synchronous PWM Step down DC/DC converter	4.0 to 30.0V	0.8V to Vin 4.0A(5.0A Peak)	Max 97%	Typ 500kHz	SOP-8 (Show datasheet)
ELM614BA	High efficiency synchronous PWM Step down DC/DC converter	4.5 to 18.0V	0.8V to 15V 2.0A	Max 95%	Typ 500kHz	SOT-26
ELM615DA	PWM Step down DC/DC converter	4.0 to 36.0V	0.8V to Vin 5.0A	Typ.97%	Typ.180kHz	SOP-8 (Show datasheet)

PWM Buck-boost

Part number	Feature	Starting voltage	Output voltage/ Output current	Efficiency	Switching frequency	Package	Datasheet
ELM631FA	Buck-boost 4-switch type DC/DC converter	3.1V	1.0V to 28.0V 6A	Max.97.5%	Typ.600kHz	QFN28-5x5 (Show datasheet)