Description
The LTM®8032 is an electromagnetic compatible (EMC) 36V, 2A DC/DC step-down μModule® regulator designed to meet the radiated emissions requirements of EN55022.
Conducted emission requirements can be met by adding standard filter components. Included in the package are the switching controller, power switches, inductor, filters and all support components. Operating over an input voltage range of 3.6V to 36V, the LTM8032 supports an output voltage range of 0.8V to 10V, and a switching frequency range of 200kHz to 2.4MHz, each set by a single resistor.
Only the bulk input and output filter capacitors are needed to finish the design. The low profile package enables utilization of unused space on the bottom of PC boards for high density point of load regulation.
The LTM8032 is packaged in a thermally enhanced, compact and low profile overmolded land grid array (LGA) and ball grid array (BGA) packages suitable for automated assembly by standard surface mount equipment. The LTM8032 is available with SnPb (BGA) or RoHS compliant terminal finish.
Application
Automotive Battery Regulation
Power for Portable Products
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
Typical Application
Block Diagram
Operation
The LTM8032 is a standalone nonisolated step-down switching DC/DC power supply. It can deliver up to 2A of DC output current with only bulk external input and output capacitors. This module provides a precisely regulated output voltage programmable via one external resistor from 0.8VDC to 10VDC. The input voltage range is 3.6V to 36V. Given that the LTM8032 is a step-down converter, make sure that the input voltage is high enough to support the desired output voltage and load current.
The LTM8032 is designed with an input EMI filter and other features to make its radiated emissions compliant with several EMC specifications including EN55022 class B. Compliance with conducted emissions requirements may be obtained by adding a standard input filter.
The LTM8032 contains a current mode controller, power switching element, power inductor, power Schottky diode and a modest amount of input and output capacitance. The LTM8032 is a fixed frequency PWM regulator. The switching frequency is set by simply connecting the appropriate resistor value from the RT pin to GND.
An internal regulator provides power to the control circuitry. The bias regulator can draw power from the VIN pin, but if the BIAS pin is connected to an external voltage higher than 2.8V, bias power will be drawn from the external source (typically the regulated output voltage). This improves efficiency. The RUN/SS pin is used to place the LTM8032
in shutdown, disconnecting the output and reducing the input current to less than 1μA.
To further optimize efficiency, the LTM8032 automatically switches to Burst Mode operation in light load situations. Between bursts, all circuitry associated with controlling the output switch is shut down reducing the input supply current to 50μA in a typical application. The oscillator reduces the LTM8032’s operating frequency when the voltage at the ADJ pin is low. This frequency foldback helps to control the output current during start-up and overload.
The LTM8032 contains a power good comparator which trips when the ADJ pin is at 90% of its regulated value. The PGOOD output is an open-collector transistor that is off when the output is in regulation, allowing an external resistor to pull the PGOOD pin high. Power good is valid when the LTM8032 is enabled and VIN is above 3.6V
Features
Complete Step-Down Switch Mode Power Supply
Wide Input Voltage Range: 3.6V to 36V
2A Output Current
0.8V to 10V Output Voltage
Selectable Switching Frequency: 200kHz to 2.4MHz
EN55022 Class B Compliant
Current Mode Control
Programmable Soft-Start
SnPb (BGA) or RoHS Compliant (LGA and BGA) Finish
Low Profile, Surface Mount LGA (9mm × 15mm × 2.82mm) and BGA (9mm × 15mm × 3.42mm) Packages
Product Parameter
|
Manufacturer |
Analog Devices, Inc. |
Base Part Number |
LTM8032 |
|
Categories |
Power Supplies - Board Mount |
Qualification Status |
Not Qualified |
|
Series |
µModule® |
Switcher Configuration |
BUCK |
|
Type |
Non-Isolated PoL Module |
Manufacturer's Part # |
LTM8032EY#PBF |
|
Voltage - Input (Min) |
3.6V |
Sub-Categories |
DC DC Converters |
|
Voltage - Output 1 |
0.8V~10V |
Part Status |
Active |
|
Applications |
ITE (Commercial) |
Number of Outputs |
1 |
|
Mounting Type |
Surface Mount |
Voltage - Input (Max) |
36V |
|
Size / Dimension |
0.59Lx0.35W x 0.13 H 15.0mmx9.0mmx3.4mm |
Current - Output (Max) |
2A |
|
Packaging |
Tray |
Operating Temperature |
-40°C~125°C |
|
Number of Terminations |
71 |
Package / Case |
71-BBGA Module |
|
Terminal Position |
BOTTOM |
Factory Lead Time |
12 Weeks |
|
Terminal Finish |
Tin/Silver/Copper (Sn/Ag/Cu) |
Published |
2012 |
|
Peak Reflow Temperature (Cel) |
NOT SPECIFIED |
Subcategory |
Switching Regulator or Controllers |
|
Reflow Temperature-Max (s) |
NOT SPECIFIED |
Control Mode |
CURRENT-MODE |
|
Control Technique |
PULSE WIDTH MODULATION |
Terminal Form |
BALL |
|
Width |
9mm |
Number of Functions |
1 |
|
Surface Mount |
YES |
Input Voltage-Nom |
10V |
|
Pin Count |
71 |
|
|
|
Height Seated (Max) |
362 |
|
|
Manufacturer
Analog Devices is a multinational semiconductor company specializing in data conversion and signal processing technology. They design and manufacture analog, mixed-signal, and digital signal processing (DSP) integrated circuits (ICs) used in electronic equipment. Their products are used in a wide variety of applications such as communications, automotive, industrial, and healthcare industries.
