Datasheet Linear Technology LTM8021

Manufacturer	Linear Technology
Series	LTM8021

36VIN, 500mA Step-Down DC/DC µModule (Power Module)

Datasheets

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PDF, 388 Kb, Language: en, File uploaded: Sep 25, 2017, Pages: 18
36VIN, 500mA Step-Down DC/DC µModule

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Packaging

	LTM8021EV#PBF	LTM8021IV#PBF
N	1	2
Package	11.25mm × 6.25mm × 2.82mm LGA Package Outline Drawing	11.25mm × 6.25mm × 2.82mm LGA Package Outline Drawing
Package Code	LGA	LGA
Package Index	05-08-1805	05-08-1805
Pin Count	35	35

Parametrics

Parameters / Models	LTM8021EV#PBF	LTM8021IV#PBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1238B	DC1238B
Design Tools	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model
Export Control	no	no
Features	Low EMI, EN55022 Class B Certified	Low EMI, EN55022 Class B Certified
Frequency, kHz	1100	1100
Integrated Inductor	yes	yes
Ishutdown, µA	0.1	0.1
Isupply, mA	1.5	1.5
Max Phases	1	1
Monolithic	yes	yes
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 85	-40 to 85
Output Current, A	0.5	0.5
Polyphase	no	no
Switch Current, A	0.9	0.9
Synchronous	no	no
Topology	Buck	Buck
Topology 1	Buck	Buck
Vin Max, V	36	36
Vin Min, V	3	3
Vout Max, V	5	5
Vout Maximum	5V	5V
Vout Min, V	0.8	0.8

Eco Plan

	LTM8021EV#PBF	LTM8021IV#PBF
RoHS	Compliant	Compliant

Design Notes

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How to Produce Negative Output Voltages from Positive Inputs Using a uModule Step-Down Regulator &mdash DN1021
PDF, 120 Kb, File published: May 24, 2011
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How to Produce Negative Output Voltages from Positive Inputs
Using a ВµModule Step-Down Regulator
Design Note 1021
Jaino Parasseril
Introduction
Linear TechnologyвЂ™s DC/DC step-down ОјModule В®
regulators are complete switchmode power supplies in a
surface-mount package. They include the DC/DC controller, inductor, power switches and supporting circuitry.
These highly integrated regulators also provide an easy
solution for applications that require negative output
voltages. In other words, these products can operate as
inverting buck-boost regulators. As a result, the lowest
potential in the circuit is not the standard 0V, but вЂ“VOUT,
which must be tied to the ОјModule regulatorвЂ™s GND. All
signals are now referred to вЂ“VOUT.
For this discussion, the LTMВ®8025 (36V, 3A) is used to
demonstrate how a buck ОјModule regulator can be altered
to produce a negative output voltage with level-shifting
circuitry for synchronization. This approach can be applied to other ОјModule regulators, such as the LTM8022
(36V, 1A), LTM8023 (36V, 2A) and LTM8027 (60V, 4A).
Design Guide
A conventional buck (step-down) ОјModule regulator
can be easily conп¬Ѓgured to generate negative output …

Model Line

Series: LTM8021 (2)

LTM8021EV#PBF LTM8021IV#PBF

Manufacturer's Classification

Power Management > Switching Regulator > Ultralow Noise Regulators
µModule Solutions > µModule Regulators > µModule Buck Regulators

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