Voltage Regulator. LMR12015 Datasheet

LMR12015 Regulator. Datasheet pdf. Equivalent

Part LMR12015
Description Step-Down Voltage Regulator
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LMR12015
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LMR12015, LMR12020
SNVS817B – JUNE 2012 – REVISED JUNE 2019
LMR120xx 20-VIN, 1.5-A or 2-A Step-Down Voltage Regulator in WSON Package
1 Features
1 Input Voltage Range of 3 V to 20 V
• Output Voltage Range of 1 V to 18 V
• LMR12015 and LMR12020 Deliver 1.5-A and 2-A
Maximum Output Current, Respectively
• 2-MHz Switching Frequency
• Frequency Synchronization from 1 MHz to 2.35
MHz
• 70-nA Shutdown Current
• 1% Voltage-Reference Accuracy
• Peak-Current-Mode PWM Operation
• Thermal Shutdown
• Internally Compensated
• Internal Soft Start
• Tight Accuracy for Powering Digital ICs
• Extremely Easy to Use
• Tiny Overall Solution Reduces System Cost
• Space-Saving WSON (3 × 3 × 0.8 mm) Packaging
• Create a custom design using the LMR12015
WEBENCH® Power Designer or LMR12020
WEBENCH® Power Designer
2 Applications
• Point-of-Load Conversions from 3.3-V, 5-V, and
12-V Rails
• Space-Constrained Applications
3 Description
The LMR120xx regulator is a monolithic, high
frequency, PWM step-down DC/DC converter in a 10-
pin WSON package. It contains 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 the
LMR12015/20 is easy to use. The ability to drive 1.5-
A or 2-A loads, with an internal 150-mNMOS
switch results in the best power density available.
The control circuitry allows for on-times as low as
65 ns, thus supporting exceptionally high frequency
conversion. Switching frequency is internally set to 2
MHz and synchronizable from 1 to 2.35 MHz, which
allows the use of extremely small surface mount
inductors and chip capacitors. Even though the
operating frequency is very high, efficiencies up to
90% are easy to achieve. External shutdown is
included featuring an ultra-low shutdown current of
70 nA. The LMR12015/20 utilizes peak 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)
LMR12015
LMR12020
WSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
VIN
C1
ON
OFF
CLK
PVIN
BOOST
AVIN
C2
SW
LMR12015/20 D1
EN
SYNC
GND/DAP
FB
R2
L1
C3
R1
VOUT
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.



LMR12015
LMR12015, LMR12020
SNVS817B – JUNE 2012 – 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 Performance Characteristics ........................ 6
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 11
7.3 Feature Description................................................. 12
7.4 Device Operation Modes ........................................ 14
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Application ................................................. 16
9 Layout ................................................................... 33
9.1 Layout Considerations ............................................ 33
10 Device and Documentation Support ................. 35
10.1 Device Support...................................................... 35
10.2 Related Links ........................................................ 35
10.3 Receiving Notification of Documentation Updates 35
10.4 Community Resources.......................................... 35
10.5 Trademarks ........................................................... 36
10.6 Electrostatic Discharge Caution ............................ 36
10.7 Glossary ................................................................ 36
11 Mechanical, Packaging, and Orderable
Information ........................................................... 36
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (April 2013) to Revision B
Page
• Editorial changes only; add WEBENCH links ........................................................................................................................ 1
Changes from Original (April 2013) to Revision A
Page
• Changed layout of National Semiconductor data sheet to TI format...................................................................................... 1
2
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