LTM4644IY-1#PBF Datasheet PDF - Linear Technology

●The LTM4644IY-1#PBF from Linear Technology is a quad DC to DC step-down µModule regulator with configurable 4A output array in 77 pin BGA package. Outputs can be paralleled in an array for up to 16A capability. Included in the package are the switching controllers, power FETs, inductors and support components. Operating over an input voltage range of 4V to 14V or 2.375V to 14V with an external bias supply, the LTM4644-1 supports an output voltage range of 0.6V to 5.5V. Its high efficiency design delivers 4A continuous (5A peak) output current per channel. Only bulk input and output capacitors are needed. The LTM4644-1 is used to interface with PMBus power system management supervisory ICs such as LTC2975. The device is typically used in multirail point of load regulation, FPGAs, DSPs and ASICs applications.

● Output voltage range from 0.6V to 5.5V

● External top feedback resistor from VOUT to VFB (one resistor per channel) (to be added on PCB)

● 4A DC, 5A peak output current each channel, ±1.5% total output voltage regulation

● Up to 5.5W power dissipation (TA = 60°C, 200 LFM, no heat sink)

● Input supply bias current of 6mA and input supply current of 0.62A

● Current mode control, fast transient response, internal temperature sensing diode output

● Parallelable for higher output current, output voltage tracking

● Output ripple voltage of 5mV, oscillator frequency of 1MHz

● External frequency synchronization, overvoltage, current and temperature protection

● Operating temperature range from -40°C to 125°C