Step-Down Regulator. LMR10530 Datasheet

LMR10530 Regulator. Datasheet pdf. Equivalent

Part LMR10530
Description Step-Down Regulator
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LMR10530
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LMR10530
SNVS814B – JUNE 2012 – REVISED JUNE 2019
LMR10530 5.5-V, 3-A, 1.5 or 3-MHz Step-Down Regulator in WSON Package
1 Features
1 Input Voltage Range of 3 V to 5.5 V
• Output Voltage Range of 0.6 V to 4.5 V
• 1.5-MHz (LMR10530X) and 3-MHz (LMR10530Y)
Switching Frequencies
• 3-A Steady-State Output Current
• Low Shutdown IQ, 300 nA Typical
• 56-mPMOS Switch
• Internal Soft Start
• Internally Compensated Peak Current-Mode
Control
• Cycle-by-cycle Current Limit and Thermal
Shutdown
• WSON (3 × 3 × 0.8 mm) Packaging
• Create a custom design using the LMR10530 with
the WEBENCH® Power Designer
2 Applications
• Point-of-load Conversions from 3.3-V and 5-V
Rails
• Space-Constrained Applications
3 Description
The LMR10530 regulator is a monolithic, high
frequency, PWM step-down DC/DC converter
available 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 LMR10530 is
easy to use. The ability to drive 3-A loads with an
internal 56-mPMOS switch using state-of-the-art
0.5-µm BiCMOS technology results in the best power
density available. The 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. Switching frequency is internally set
to 1.5 MHz or 3 MHz, allowing the use of extremely
small surface mount inductors and capacitors. 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
300 nA. The LMR10530 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,
cycle-by-cycle current limit, frequency foldback,
thermal shutdown, and output overvoltage protection.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMR10530
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
VIN
R3
C1
C3
9,10
VIND
7,8
SW
D1
2
EN LMR10530
5
1
FB
VINC
4
NC
SGND PGND
3
6
L1
R1
R2
VOUT
C2
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.



LMR10530
LMR10530
SNVS814B – 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 Characteristics .............................................. 6
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 11
7.3 Feature Description................................................. 12
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Application ................................................. 16
9 Layout ................................................................... 26
9.1 Layout Considerations ............................................ 26
10 Device and Documentation Support ................. 27
10.1 Device Support...................................................... 27
10.2 Receiving Notification of Documentation Updates 27
10.3 Community Resources.......................................... 27
10.4 Trademarks ........................................................... 27
10.5 Electrostatic Discharge Caution ............................ 27
10.6 Glossary ................................................................ 28
11 Mechanical, Packaging, and Orderable
Information ........................................................... 28
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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