Voltage Regulator. LMR10520 Datasheet

LMR10520 Regulator. Datasheet pdf. Equivalent

Part LMR10520
Description Step-Down Voltage Regulator
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LMR10520
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LMR10520
SNVS730C – OCTOBER 2011 – REVISED JUNE 2019
LMR10520 5.5-VIN, 2-A Step-Down Voltage Regulator in WSON
1 Features
1 Input Voltage Range of 3 V to 5.5 V
• Output Voltage Range of 0.6 V to 4.5 V
• Output Current up to 2 A
• 1.6-MHz (LMR10520X) and 3-MHz (LMR10520Y)
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
• WSON (3 × 3 × 0.8 mm) Packaging
• Create a custom design using the LMR10520 with
the WEBENCH® Power Designer
2 Applications
• Point-of-Load Conversions from 3.3-V and 5-V
Rails
• Space-Constrained Applications
• Battery-Powered Equipment
• Industrial Distributed Power Applications
• Power Meters
• Portable Hand-Held Instruments
3 Description
The LMR10520 regulator is a monolithic, high
frequency, PWM step-down DC/DC converter in a 6-
pin WSON 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, the LMR10520 is easy to use.
The ability to drive 2-A loads with an internal 150-m
PMOS switch results in the best power density
available. The world-class control circuitry allows on-
times as low as 30 ns, thus supporting exceptionally
high frequency conversion over the entire 3-V to 5.5-
V input operating range down to the minimum output
voltage of 0.6 V. The LMR10520 is internally
compensated, so it is simple to use and requires few
external components. Even though the operating
frequency is high, efficiencies up to 93% are easy to
achieve. External shutdown is included, featuring an
ultra-low stand-by current of 30 nA. The LMR10520
uses 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)
LMR10520
WSON (6)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
R3
VIN
C1
Typical Application
EN
FB
LMR10520 GND
L1
VIN
SW
D1
VOUT
R1
C2
C3
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.



LMR10520
LMR10520
SNVS730C – OCTOBER 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 .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................. 10
8 Application and Implementation ........................ 11
8.1 Application Information............................................ 11
8.2 Typical Application ................................................. 11
9 Layout ................................................................... 19
9.1 Layout Guidelines ................................................... 19
9.2 Layout Example ...................................................... 19
9.3 Thermal Definitions ................................................. 20
9.4 WSON Package ...................................................... 21
10 Device and Documentation Support ................. 22
10.1 Device Support...................................................... 22
10.2 Receiving Notification of Documentation Updates 22
10.3 Community Resources.......................................... 22
10.4 Trademarks ........................................................... 22
10.5 Electrostatic Discharge Caution ............................ 22
10.6 Glossary ................................................................ 23
11 Mechanical, Packaging, and Orderable
Information ........................................................... 23
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (April 2013) to Revision C
Page
• Editorial changes only; add WEBENCH links......................................................................................................................... 1
Changes from Revision A (April 2013) to Revision B
Page
• Changed layout of National Semiconductor data sheet to TI format...................................................................................... 1
2
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