DC1367A: Dual DC/DC with LDO, 2.5V ~ 5.5V in

Summary

Demonstration circuit 1367A features the LTM®4615EV, a triple output μModule® regulator consisting of two switch mode outputs and one LDO output. Each LTM4615 DC/DC converter has a separate input and enable pin.

The LTM4615 maximum load current is 4A for each switch mode channel and 1.5A for the VLDO™ channel. However the DC1367A is configured with the LDO input supply connected to the VOUT2 whose maximum output current decreases accordingly.

Derating is necessary for certain VIN, VOUT and thermal conditions. The LTM4615 data sheet must be read in conjunction with this manual prior to working on or modifying DC1367A.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Multi Output
Eval Board Part Number	DC1367A-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	3 Non-Isolated
Voltage Out: Highest Current First	1.8V, 1.2V, 1V
Current Out	4A, 2.5A, 1.5A
Voltage In	2.5 ~ 5.5 V
Efficiency @ Conditions	>83%, 5.5V in, 1.8V @ 0.7 ~ 3.8 A >82%, 5.5V in, 1.2V @ 1 ~ 2.4 A
Voltage Out Range	0.8 ~ 5 V
Features	Internal Inductor Over Current Protection Over Voltage Protection Power Good Output Short Circuit Protection Shutdown, Enable, Standby Soft Start Thermal Protection Voltage Tracking
Switching Frequency	1.25 MHz
Standby Current [Typical]	7 µA
Quiescent Current [Typical]	45 mA
Component Count + Extras	22 + 29
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	FPGA / DSP / Processors Point of Load (PoL) Telecom
Standby Current [Maximum]	12 µA
Quiescent Current [Maximum]
Main I.C. Base Part	LTM4615EV
Date Created By Author
Date Added To Library	2011-03