This Design Note introduces the LTM4615, a triple output DC/DC µModule® regulator that can replace up to 30 discrete components in a 15mm×15mm×2.8mm surface mount package.
The LTM4615 is a compact multioutput DC/DC system designed for multivoltage systems where space and design time are tight. It integrates two switching regulators and one very low dropout (VLDO) linear regulator in a single 15mm x 15mm x 2.8mm LGA surface mount package, replacing up to 30 discrete components.
The device features two switching DC/DC regulators operating at 1.25MHz with input voltages between 2.35V and 5.5V, delivering 4A continuous current (5A peak) from 0.8V to 5V outputs. Additionally, it includes a VLDO regulator capable of up to 1.5A output current with an adjustable range of 0.4V to 2.6V and a low voltage dropout of 200mV at maximum load.
| Package Dimensions | 15mm x 15mm x 2.8mm |
|---|---|
| Switching Frequency | 1.25MHz |
| Output Current (Switching) | 4A continuous, 5A peak |
| Output Voltage Range (Switching) | 0.8V to 5V |
| VLDO Output Current | 1.5A |
| VLDO Dropout Voltage | 200mV |
The LTM4615 replaces up to 30 discrete components when compared to a triple-output high efficiency DC/DC circuit.
The two switching regulators operate at a 1.25MHz switching frequency.