DESCRIPTION
The LTM®4660 is a complete 300W output switching
mode hybrid-topology step-down DC/DC μModule®
micromodule) nonisolated bus converter. Its exposed
power inductor resides on the top of the package, providing
an intrinsic path for heat to dissipate up and out
of the module—away from one’s printed circuit board.
Included in the package are the switching controller IC,
power MOSFETs and supporting components. Only flying
charge-pump) capacitors, bulk input and output bypass
capacitors, and a few configuration passives are needed.
The LTM4660 features frequency synchronization,
Burst Mode® operation and output voltage soft-start and
tracking. An onboard temperature diode is available for
temperature monitoring. The LTM4660 protects against
short-circuit, overcurrent, and overtemperature faults. For
higher power applications, multiple LTM4660 modules
can be easily paralleled.
The LTM4660 is offered in a 16mm × 16mm × 10.34mm
BGA package with RoHS compliant terminal finish.

FEATURES
- Input Voltage Range: 30V to 60V (65V Abs. Max.)
- Wide Output Voltage: 4.5V to 18V (VOUT < VIN/2)
- 97.3% Peak Efficiency (12VOUT at 15A, 48VIN)
- ±1.5% Maximum Total DC Output Error
- Up to 300W Output Power
- Scalable: Parallel LTM4660s for Higher Power
- Fixed Frequency Current Mode Control
- Phase-Lockable External Synchronization from 200kHz to 1MHz
- Low Start-Up Inrush Current with Flying Capacitor
Voltage-Balancing Prior to DC/DC Switching Action
- Output Voltage Tracking with Soft-Start
- Short-Circuit Protection with Adjustable Retry-Timer
- Overcurrent and Overtemperature Protection
- Onboard Diode Temperature Monitor
- Optional External Reference Input
- Power Good and FAULT Indicators
- 16mm × 16mm × 10.34mm BGA Package

APPLICATIONS
- Telecom, Data Centers and Networking Equipment
- Industrial and Test Equipment