Startseite Energiemanagement AC/DC- und DC/DC-Wandler (integrierter FET)

LM20125

AKTIV

Synchroner Strommodus-Abwärtsregler, 2,95-5,5 V, 5 A, mit optionaler Automobilzulassung

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TPS62816-Q1 AKTIV Abwärtswandler für die Automobilindustrie, 2,75 bis 6 V, 6 A, in QFN-Gehäuse 2 x 3 mm mit benetzbare Next generation 6-A buck with higher efficiency, lower EMI and a smaller solution size.

Produktdetails

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 5 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 5 Iq (typ) (µA) 3500 Duty cycle (max) (%) 85
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 5 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 5 Iq (typ) (µA) 3500 Duty cycle (max) (%) 85
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • LM20125Q is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Efficiency with 500 kHz Switching Frequency
  • 32 mΩ Integrated FET Switches
  • Starts up into Pre-Biased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Output Voltage Down to 0.8V
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal Shutdown
  • HTSSOP 16-Pin Exposed Pad Package

All trademarks are the property of their respective owners.

  • LM20125Q is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Efficiency with 500 kHz Switching Frequency
  • 32 mΩ Integrated FET Switches
  • Starts up into Pre-Biased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Output Voltage Down to 0.8V
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal Shutdown
  • HTSSOP 16-Pin Exposed Pad Package

All trademarks are the property of their respective owners.

The LM20125 is a full featured 500 kHz synchronous buck regulator capable of delivering up to 5A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20125 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20125 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20125 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

The LM20125 is a full featured 500 kHz synchronous buck regulator capable of delivering up to 5A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20125 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20125 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The LM20125 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM20125/LM20125Q 5A, 500kHz PowerWise ® Synchronous Buck Regulator datasheet (Rev. E) 27 Mär 2013
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
EVM User's guide AN-1687 LM20125 Evaluation Board (Rev. B) 03 Mai 2013
Application note AN-1752 5A LM20k Reference Designs (Rev. C) 03 Mai 2013
Application note AN-2077 LM20k POL Module (Rev. A) 03 Mai 2013
Application note Power Supply Design Considerations for Modern FPGAs (Power Designer 121) 02 Feb 2010
EVM User's guide AN-1687 LM20125 Evaluation Board (Rev. A) 30 Okt 2007

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM20125EVAL — 5 A, 500 kHz, PowerWise®-Synchron-Abwärtsregler – Evaluierungsmodul

The LM20125 is a full featured buck switching regulator capable of driving up to 5A of load current. The nominal 500 kHz switching frequency of the LM20125 reduces the size of the power stage components while still allowing for highly efficient operation. The LM20125 is capable of converting an (...)

Benutzerhandbuch: PDF
Simulationsmodell

LM20125 TINA-TI Average Reference Design

SNVM627.TSC (1008 KB) - TINA-TI Reference Design
Simulationsmodell

LM20125 TINA-TI Average Spice Model

SNVM626.ZIP (8 KB) - TINA-TI Spice Model
Simulationsmodell

LM20125 TINA-TI Transient Reference Design

SNVM629.TSC (53 KB) - TINA-TI Reference Design
Simulationsmodell

LM20125 TINA-TI Transient Spice Model

SNVM628.ZIP (11 KB) - TINA-TI Spice Model
Berechnungstool

LM20125DESIGN-CALC — LM20125 Design-Spreadsheet

Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
HTSSOP (PWP) 16 Ultra Librarian

Bestellen & Qualität

Beinhaltete Information:
  • RoHS
  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

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