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Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 5.5 Vout (Min) (V) 0.6 Vout (Max) (V) 4.5 Iout (Max) (A) 3 Iq (Typ) (mA) 3.2 Switching frequency (Min) (kHz) 1600 Switching frequency (Max) (kHz) 3750 Features Enable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

WSON (DSC) 10 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • 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-mΩ PMOS 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

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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-mΩ PMOS 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.

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Technical documentation

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Type Title Date
* Datasheet LMR10530 5.5-V, 3-A, 1.5 or 3-MHz Step-Down Regulator in WSON Package datasheet (Rev. B) Jun. 14, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Application notes Absolute Maximum Ratings for Soldering (Rev. D) Jun. 09, 2016
Application notes Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
User guides AN-2280 LMR10530 Evaluation Module (Rev. A) Apr. 26, 2013
Application notes AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr. 24, 2013
Application notes AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) Apr. 23, 2013
Application notes AN-1197 Selecting Inductors for Buck Converters (Rev. B) Apr. 23, 2013
Application notes AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr. 23, 2013
Application notes AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) Apr. 23, 2013
Application notes AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) Apr. 23, 2013
Application notes AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr. 23, 2013
Application notes AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) Apr. 23, 2013
Application notes Input and Output Capacitor Selection Sep. 19, 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul. 12, 2005
Application notes AN-643 EMI/RFI Board Design (Rev. B) May 03, 2004

Design & development

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