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LMR10530

ACTIVE

5.5V, 3A 3MHz Step-Down Regulator in WSON Package

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Product details

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 Control mode current mode Duty cycle (max) (%) 90 Type Converter
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 Control mode current mode Duty cycle (max) (%) 90 Type Converter
WSON (DSC) 10 9 mm² 3 x 3
  • 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
  • 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

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.

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
* Data sheet LMR10530 5.5-V, 3-A, 1.5 or 3-MHz Step-Down Regulator in WSON Package datasheet (Rev. B) PDF | HTML 14 Jun 2019
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mar 2024
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 06 Dec 2023
Application note Absolute Maximum Ratings for Soldering (Rev. D) 09 Jun 2016
User guide AN-2280 LMR10530 Evaluation Module (Rev. A) 26 Apr 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004

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