Switching Regulator. LMR12010 Datasheet

LMR12010 Regulator. Datasheet pdf. Equivalent

Part LMR12010
Description Step-Down DC/DC Switching Regulator
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LMR12010
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LMR12010
SNVS731B – SEPTEMBER 2011 – REVISED JUNE 2019
LMR12010 3-V to 20-V, 1-A Step-Down DC/DC Switching Regulator in SOT-23
1 Features
1 Input Voltage Range of 3 V to 20 V
• Output Voltage Range of 0.8 V to 17 V
• Output Current up to 1 A
• 1.6 MHz (LMR12010X) and 3 MHz (LMR12010Y)
Switching Frequencies
• Low Shutdown IQ, 30 nA Typical
• Internal Soft Start
• Internally Compensated
• Current-Mode PWM Operation
• Thermal Shutdown
• Tiny Overall Solution Reduces System Cost
• Thin 6-Pin SOT-23 Package (2.97 × 1.65 × 1 mm)
• Create a custom design using the LMR12010 with
the WEBENCH® Power Designer
2 Applications
• Point-of-Load Conversions from 3.3-V, 5-V, and
12-V Rails
• Space Constrained Applications
• Battery Powered Equipment
• Industrial Distributed Power Applications
• Power Meters
• Portable Hand-Held Instruments
3 Description
The LMR12010 regulator is a monolithic, high
frequency, PWM step-down DC/DC converter in a 6-
pin thin SOT23 package. It provides all the active
functions to provide local DC/DC conversion with fast
transient response and accurate regulation in the
smallest possible PCB area.
With a minimum of external components and online
design support through WEBENCH, the LMR12010 is
easy to use. The ability to drive 1-A loads with an
internal 300-mNMOS switch using state-of-the-art
0.5-µm BiCMOS technology results in the best power
density available. The world class control circuitry
allows for on-times as low as 13 ns, thus supporting
exceptionally high frequency conversion over the
entire 3-V to 20-V input operating range down to the
minimum output voltage of 0.8 V. Switching frequency
is internally set to 1.6 MHz (LMR12010X) or 3 MHz
(LMR12010Y), allowing the use of extremely small
surface mount inductors and chip capacitors. Even
though the operating frequencies are very high,
efficiencies up to 90% are easy to achieve. External
shutdown is included, featuring an ultra-low standby
current of 30 nA. The LMR12010 utilizes current-
mode control and internal compensation to provide
high-performance regulation over a wide range of
operating conditions. Additional features include
internal soft-start circuitry to reduce inrush current,
pulse-by-pulse current limit, thermal shutdown, and
output overvoltage protection.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMR12010
SOT-23-THIN (6) 2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
VIN
C1
ON
OFF
D2
VIN
BOOST
C3
SW
LMR12010
D1
EN
FB
GND
L1
VOUT
C2
R1
R2
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.



LMR12010
LMR12010
SNVS731B – SEPTEMBER 2011 – REVISED JUNE 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 Recommended Operating Ratings ........................... 4
6.3 Electrical Characteristics........................................... 5
6.4 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 11
8 Application and Implementation ........................ 15
8.1 Application Information............................................ 15
8.2 Typical Application ................................................. 15
9 Layout ................................................................... 21
9.1 Layout Considerations ............................................ 21
9.2 Calculating The LMR12010 Junction Temperature 21
10 Device and Documentation Support ................. 24
10.1 Device Support...................................................... 24
10.2 Receiving Notification of Documentation Updates 24
10.3 Community Resources.......................................... 24
10.4 Trademarks ........................................................... 24
10.5 Electrostatic Discharge Caution ............................ 24
10.6 Glossary ................................................................ 25
11 Mechanical, Packaging, and Orderable
Information ........................................................... 25
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (September 2011) to Revision B
Page
• Editorial changes only; add WEBENCH links ........................................................................................................................ 1
2
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