Startseite Energiemanagement AC/DC- und DC/DC-Controller (externer FET)

LM3000

AKTIV

3,3-V- bis 18,5-V-Synchronabwärtsregler mit zwei Ausgängen im Strommodus

Produktdetails

Vin (min) (V) 3.3 Vin (max) (V) 18.5 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 15 Features Enable, Frequency synchronization, Synchronous Rectification, Tracking Iq (typ) (µA) 5000 Duty cycle (max) (%) 80 Number of phases 1
Vin (min) (V) 3.3 Vin (max) (V) 18.5 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode current mode Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 15 Features Enable, Frequency synchronization, Synchronous Rectification, Tracking Iq (typ) (µA) 5000 Duty cycle (max) (%) 80 Number of phases 1
WQFN (RTV) 32 25 mm² 5 x 5
  • VIN Range FROM 3.3V to 18.5V
  • Output Voltage From 0.6V to 80% of VIN
  • Remote Differential Output Voltage Sensing
  • 1% Accuracy at FB Pin
  • Interleaved Operation Reduces Input Capacitors
  • Frequency Sync/Adjust From 200 kHz to 1.5 MHz
  • Startup With Pre-Bias Load
  • Independent Power Good, Enable, Soft-Start and Track
  • Programmable Current Limit Without External Sense Resistor
  • Hiccup Mode Short Circuit Protection

All trademarks are the property of their respective owners.

  • VIN Range FROM 3.3V to 18.5V
  • Output Voltage From 0.6V to 80% of VIN
  • Remote Differential Output Voltage Sensing
  • 1% Accuracy at FB Pin
  • Interleaved Operation Reduces Input Capacitors
  • Frequency Sync/Adjust From 200 kHz to 1.5 MHz
  • Startup With Pre-Bias Load
  • Independent Power Good, Enable, Soft-Start and Track
  • Programmable Current Limit Without External Sense Resistor
  • Hiccup Mode Short Circuit Protection

All trademarks are the property of their respective owners.

The LM3000 is a dual output synchronous buck controller which is designed to convert input voltages ranging from 3.3V to 18.5V down to output voltages as low as 0.6V. The two outputs switch at a constant programmable frequency of 200 kHz to 1.5 MHz, with the second output 180 degrees out of phase from the first to minimize the input filter requirements. The switching frequency can also be phase locked to an external frequency. A CLKOUT provides an external clock 90 degrees out of phase with the main clock so that a second chip can be run out of phase with the main chip. The emulated current-mode control utilizes bottom side FET sensing to provide fast transient response and current limit without the need for external current sense resistors or RC networks. Separate Enable, Soft-Start and Track pins allow each output to be controlled independently to provide maximum flexibility in designing system power sequencing.

The LM3000 has a full range of protection features which include input under-voltage lock-out (UVLO), power good (PGOOD) signals for each output, over-voltage crowbar and hiccup mode during short circuit events.

The LM3000 is a dual output synchronous buck controller which is designed to convert input voltages ranging from 3.3V to 18.5V down to output voltages as low as 0.6V. The two outputs switch at a constant programmable frequency of 200 kHz to 1.5 MHz, with the second output 180 degrees out of phase from the first to minimize the input filter requirements. The switching frequency can also be phase locked to an external frequency. A CLKOUT provides an external clock 90 degrees out of phase with the main clock so that a second chip can be run out of phase with the main chip. The emulated current-mode control utilizes bottom side FET sensing to provide fast transient response and current limit without the need for external current sense resistors or RC networks. Separate Enable, Soft-Start and Track pins allow each output to be controlled independently to provide maximum flexibility in designing system power sequencing.

The LM3000 has a full range of protection features which include input under-voltage lock-out (UVLO), power good (PGOOD) signals for each output, over-voltage crowbar and hiccup mode during short circuit events.

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Technische Dokumentation

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Alle anzeigen 5
Typ Titel Datum
* Data sheet LM3000 Dual Synchronous Emulated Current-Mode Controller datasheet (Rev. B) 03 Apr 2013
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
User guide LM3000 Buck Controller Evaluation Module User's Guide (Rev. B) PDF | HTML 18 Feb 2022
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21 Jul 2016

Design und Entwicklung

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Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
WQFN (RTV) 32 Ultra Librarian

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