LMR14020 Converter Datasheet

LMR14020 Datasheet PDF, Equivalent


Part Number

LMR14020

Description

2.2MHz Step-Down Converter

Manufacture

etcTI

Total Page 30 Pages
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LMR14020
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LMR14020
SNVSAA5A – FEBRUARY 2015 – REVISED APRIL 2015
LMR14020 SIMPLE SWITCHER® 40 V 2 A, 2.2 MHz Step-Down Converter with 40 µA IQ
1 Features
1 4 V to 40 V Input Range
• 2 A Continuous Output Current
• Ultra-low 40 µA Operating Quiescent Current
• 90 mHigh-Side MOSFET
• Minimum Switch-On Time: 75 ns
• Current Mode Control
• Adjustable Switching Frequency from 200 kHz to
2.5 MHz
• Frequency Synchronization to External Clock
• Internal Compensation for Ease of Use
• High Duty Cycle Operation Supported
• Precision Enable Input
• 1 µA Shutdown Current
• External Soft-start
• Thermal, Overvoltage and Short Protection
• 8-Pin HSOIC with PowerPAD™ Package
3 Description
The LMR14020 is a 40 V, 2 A step down regulator
with an integrated high-side MOSFET. With a wide
input range from 4 V to 40 V, it’s suitable for various
applications from industrial to automotive for power
conditioning from unregulated sources. The
regulator’s quiescent current is 40 µA in Sleep-mode,
which is suitable for battery powered systems. An
ultra-low 1 μA current in shutdown mode can further
prolong battery life. A wide adjustable switching
frequency range allows either efficiency or external
component size to be optimized. Internal loop
compensation means that the user is free from the
tedious task of loop compensation design. This also
minimizes the external components of the device. A
precision enable input allows simplification of
regulator control and system power sequencing. The
device also has built-in protection features such as
cycle-by-cycle current limit, thermal sensing and
shutdown due to excessive power dissipation, and
output overvoltage protection.
2 Applications
• Automotive Battery Regulation
• Industrial Power Supplies
• Telecom and Datacom Systems
• Battery Powered System
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMR14020SDDA
HSOIC-8
4.89 mm x 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
VIN up to 40 V
CIN
RT
VIN
EN BOOT
RT/SYNC
SW
CBOOT
L
D RFBT
SS FB
CSS
GND
RFBB
VOUT
COUT
Efficiency vs Output Current
100
90
80
70
60
50
40
30
20
10 VIN = 12 V, gSW = 1 MHz
0
0.001
0.01
0.1
IOUT (A)
VOUT = 5 V
VOUT = 3.3 V
1 10
D001
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

LMR14020
LMR14020
SNVSAA5A – FEBRUARY 2015 – REVISED APRIL 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 5
7.6 Switching Characteristics .......................................... 5
7.7 Typical Characteristics .............................................. 6
8 Detailed Description .............................................. 8
8.1 Overview ................................................................... 8
8.2 Functional Block Diagram ......................................... 8
8.3 Feature Description................................................... 9
9 Application and Implementation ........................ 15
9.1 Application Information............................................ 15
9.2 Typical Application ................................................. 15
10 Power Supply Recommendations ..................... 21
11 Layout................................................................... 21
11.1 Layout Guidelines ................................................. 21
11.2 Layout Example .................................................... 22
12 Device and Documentation Support ................. 23
12.1 Trademarks ........................................................... 23
12.2 Electrostatic Discharge Caution ............................ 23
12.3 Glossary ................................................................ 23
13 Mechanical, Packaging, and Orderable
Information ........................................................... 23
5 Revision History
Changes from Original (February 2015) to Revision A
Page
• Changed from Product Preview to Production Data............................................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: LMR14020
Copyright © 2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LMR14020 SNVSAA5A – FEBRUA RY 2015 – REVISED APRIL 2015 LMR14020 SIMPLE SWITCHER® 40 V 2 A, 2.2 MHz St ep-Down Converter with 40 µA IQ 1 Fea tures •1 4 V to 40 V Input Range • 2 A Continuous Output Current • Ultra -low 40 µA Operating Quiescent Current • 90 mΩ High-Side MOSFET • Minim um Switch-On Time: 75 ns • Current Mo de Control • Adjustable Switching Fre quency from 200 kHz to 2.5 MHz • Freq uency Synchronization to External Clock • Internal Compensation for Ease of Use • High Duty Cycle Operation Suppo rted • Precision Enable Input • 1 A Shutdown Current • External Soft-s tart • Thermal, Overvoltage and Short Protection • 8-Pin HSOIC with PowerP AD™ Package 3 Description The LMR140 20 is a 40 V, 2 A step down regulator w ith an integrated high-side MOSFET. Wit h a wide input range from 4 V to 40 V, it’s suitable for various applications from industrial to automotive for power conditioning from unregula.
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