DC/DC Converter

Boost Type and Buck 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 18.0V by 0.1V step.

PFM Step up
Part number Feature Starting voltage Output voltage Efficiency Oscillating 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)
Datasheet(pdf)
ELM94series PFM Step up 0.98V 2.5 to 5.5V Typ 80% Typ 35kHz SOT-89
Datasheet(pdf)
ELM93series High efficiency PFM Step up 0.9V 1.8 to 3.8V Typ 85% Typ 100kHz SOT-23
SOT-89
Datasheet(pdf)
PWM Step up
Part number Feature Starting voltage Output voltage Efficiency Oscillating frequency Package Datasheet
ELM95series PWM Step up 0.9V 2.5 to 5.5V Typ 85% Typ 55kHz
Typ 100kHz
SOT-89
SOT-23
Datasheet(pdf)
ELM92series CE
High output current
PWM Step up
0.9V 2.5 to 5.5V Typ 85% Typ 600kHz SOT-89
SOT-89-5
Datasheet(pdf)
ELM620BA High efficiency
synchronous
PWM Step up
DC/DC converter
0.9V 2.5 to 6.0V Max.96% Typ.1.4MHz SOT-26
Datasheet(pdf)
ELM621LA Step up
DC/DC converter
2.5V 2.7 to 30.0V Max.90% Typ.1.3MHz TSOT-25
Datasheet(pdf)
ELM623FA Synchronous
PWM Step up
DC/DC converter
2.7V 3.0 to 18.0V Max.93% Typ.460kHz QFN20-4×4
Datasheet(pdf)
PWM Step down
Part number Feature Supply voltage range Output voltage/
current
Efficiency Oscillating 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
Datasheet(pdf)
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
Datasheet(pdf)
ELM605DA High efficiency
synchronous
PWM Step down
DC/DC converter
2.5 to 6.0V 0.8V to Vin
2.0A
Max.95% Typ 1.0MHz SOP-8
Datasheet(pdf)
ELM612DA PWM Step down
DC/DC converter
5.5 to 36.0V 0.8V to Vin
3.0A
Typ.87% Typ.150kHz SOP-8
Datasheet(pdf)
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
Datasheet(pdf)