12A μModule (Power Module) Regulators with PLL, Output Tracking and Margining

The LTM4601A is a complete 12A step-down switch mode DC/DC power supply with onboard switching controller, MOSFETs, inductor and all support components. The μModule® regulator is housed in a small surface mount 15mm × 15mm × 2.82mm LGA or 15mm × 15mm × 3.42mm BGA package. The LTM4601A LGA and BGA packages are designed with redundant mounting pads to enhance solder-joint strength for extended temperature cycling endurance. Operating over an input voltage range of 4.5V to 20V, the LTM4601A supports an output voltage range of 0.6V to 5V as well as output voltage tracking and margining. The high efficiency design delivers 12A continuous current (14A peak). Only bulk input and output capacitors are needed to complete the design.

The low profile and light weight package easily mounts on the back side of PC boards. The μModule regulator can be synchronized with an external clock for reducing undesirable frequency harmonics and allows PolyPhase® operation for high load currents.

An onboard differential remote sense amplifier can be used to accurately regulate an output voltage independent of load current. The onboard remote sense amplifier is not available in the LTM4601A-1.

LTM4601

LTM4601A

LTM4601HV

LTM4601AHV

Vin Max

20V

20V

28V

28V

On Board Remote Sense

LTM4601 Yes

LTM4601A Yes

Yes

Yes

On Board Remote Sense

LTM4601-1 No

LTM4601A-1 No

Yes

Yes

Back Side Pads

118

135 (for stronger solder joint stability)

118

135 (for stronger solder joint stability)

Applications

* Telecom and Networking Equipment

* Servers

20V

* Complete Switch Mode Power Supply

* Wide Input Voltage Range: 4.5V to 20V

* 12A DC Typical, 14A Peak Output Current

* 0.6V to 5V Output Voltage

* Output Voltage Tracking and Margining

* Redundant Mounting Pads for Enhanced Solder-Joint Strength

* Parallel Multiple μModules for Current Sharing

* Differential Remote Sensing for Precision Regulation (LTM4601A Only)

* PLL Frequency Synchronization