Linear Technology - Product Page

LTM4636 - 40A DC/DC μModule Regulator

Datasheet

Videos Documentation

Features

Stacked Inductor Acts as Heat Sink
Wide Input Voltage Range: 4.7V to 15V
0.6V to 3.3V Output Voltage Range
±1.3% Total DC Output Voltage Error Over Line, Load and Temperature (–40°C to 125°C)
Differential Remote Sense Amplifier for Precision Regulation
Current Mode Control/Fast Transient Response
Frequency Synchronization
Parallel Current Sharing (Up to 240A)
Internal or External Compensation
88% Efficiency (12V_IN, 1V_OUT) at 40A
Overcurrent Foldback Protection
16mm × 16mm × 7.07mm BGA Package

Typical Application

Description

The LTM®4636 is a 40A step-down μModule (power module) switching regulator with a stacked inductor as a heat sink for quicker heat dissipation and cooler operation in a small package. The exposed inductor permits direct contact with airflow from any direction. The LTM4636 can deliver 40W (12V_IN, 1V_OUT, 40A, 200LFM) with only 40°C rise over the ambient temperature. Full-power 40W is delivered, up to 83°C ambient and half-power 20W is supported at 110°C ambient.

The LTM4636 operates at 92%, 90% and 88% efficiency, delivering 15A, 30A and 40A, respectively, to a 1V load 12V_IN). The μModule regulator is scalable such that four μModules in current sharing mode deliver 160W with only 40°C rise and 88% efficiency (12V_IN, 1V_OUT, 400LFM). The LTM4636 is offered in a 16mm × 16mm × 7.07mm BGA package.

	Notes
LTM4636	Simpler circuits and fewer features
LTM4636-1	Extra internal circuitry for detecting overtemperature and input/output overvoltage conditions

Packaging

16mm x 16mm x 7.07mm BGA

Order Info

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)^*
LTM4636EY#PBF	BGA	144	E	$55.50	$38.85
LTM4636IY#PBF	BGA	144	I	$61.04	$42.73
LTM4636IY-1#PBF	BGA	144	I	$63.02	$44.11
LTM4636EY-1#PBF	BGA	144	E	$57.29	$40.10

^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number	Description	Price	Documentation
DC2230A-A	LTM4636 Demo Board \| Buck μModule Regulator, Stacked Inductor, 4.7V ≤ VIN ≤ 15V, Vout = 0.6V to 3.3V @ 40A	$65.00	Design File Manual Schematic