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LM20333

ACTIVO

Regulador reductor síncrono de modo de corriente de 3 A y 4.5-36 V con sincronización de frecuencia

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Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
TLVM13630 ACTIVO Módulo de potencia de bajada de 3 A, de alta densidad, con entrada de 3 V a 36 V y salida de 1 V a 6 Save board space, simplify design and speed time to market with an integrated-inductor power module.

Detalles del producto

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 1500 Features Enable, Frequency synchronization, Over Current Protection, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 32 Iq (typ) (µA) 2300 Duty cycle (max) (%) 80
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 4.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 1500 Features Enable, Frequency synchronization, Over Current Protection, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 32 Iq (typ) (µA) 2300 Duty cycle (max) (%) 80
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • 4.5V to 36V Input Voltage Range
  • 3A Output Current, 5.2A Peak Current
  • 130 mΩ/110 mΩ Integrated Power MOSFETs
  • 94% Peak Efficiency with Synchronous Rectification
  • 1.5% Feedback Voltage Accuracy
  • Current Mode Control, Selectable Compensation
  • Oscillator Synchronization from 250kHz to 1.5MHz
  • Adjustable Output Voltage Down to 0.8V
  • Compatible with Pre-biased Loads
  • Programmable Soft-start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • OVP, UVLO Inputs and PGOOD Output
  • Internally Protected with Peak Current Limit, Thermal Shutdown and Restart
  • Accurate Current Limit Minimizes Inductor Size
  • Non-linear Current Mode Slope Compensation
  • 20-Pin HTSSOP Exposed Pad Package

All trademarks are the property of their respective owners.

  • 4.5V to 36V Input Voltage Range
  • 3A Output Current, 5.2A Peak Current
  • 130 mΩ/110 mΩ Integrated Power MOSFETs
  • 94% Peak Efficiency with Synchronous Rectification
  • 1.5% Feedback Voltage Accuracy
  • Current Mode Control, Selectable Compensation
  • Oscillator Synchronization from 250kHz to 1.5MHz
  • Adjustable Output Voltage Down to 0.8V
  • Compatible with Pre-biased Loads
  • Programmable Soft-start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • OVP, UVLO Inputs and PGOOD Output
  • Internally Protected with Peak Current Limit, Thermal Shutdown and Restart
  • Accurate Current Limit Minimizes Inductor Size
  • Non-linear Current Mode Slope Compensation
  • 20-Pin HTSSOP Exposed Pad Package

All trademarks are the property of their respective owners.

The LM20333 is a full featured synchronous buck regulator capable of delivering up to 3A of load current. The current mode control loop is externally compensated with only two components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high 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. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good (PGOOD) circuit.

The LM20333 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 LM20333 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 switching frequency of the LM20333 can be synchronized to an external clock by use of the SYNC pin. The SYNC pin is capable of synchronizing to input signals ranging from 250 kHz to 1.5 MHz.

The LM20333 is offered in an exposed pad 20-pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.

The LM20333 is a full featured synchronous buck regulator capable of delivering up to 3A of load current. The current mode control loop is externally compensated with only two components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high 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. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good (PGOOD) circuit.

The LM20333 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 LM20333 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 switching frequency of the LM20333 can be synchronized to an external clock by use of the SYNC pin. The SYNC pin is capable of synchronizing to input signals ranging from 250 kHz to 1.5 MHz.

The LM20333 is offered in an exposed pad 20-pin HTSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LM20333 36V, 3A Synchronous Buck Regulator with Frequency Synchronization datasheet (Rev. D) 03 abr 2013
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
EVM User's guide AN-1791 LM20333 Evaluation Board (Rev. B) 05 may 2013

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LM20333EVAL — Placa de evaluación para LM20333

This evaluation board provides a solution to examine the full featured LM20333 buck switching regulator that is capable of driving up to 3A of load current. This device features a clock synchronization input that allows the switching frequency to be synchronized to an external clock source. The (...)

Guía del usuario: PDF
Modelo de simulación

LM20333 TINA-TI Average Reference Design

SNVM372.TSC (72 KB) - TINA-TI Reference Design
Modelo de simulación

LM20333 TINA-TI Average Spice Model

SNVM371.ZIP (8 KB) - TINA-TI Spice Model
Modelo de simulación

LM20333 TINA-TI Transient Reference Design

SNVM369.TSC (199 KB) - TINA-TI Reference Design
Modelo de simulación

LM20333 TINA-TI Transient Spice Model

SNVM370.ZIP (11 KB) - TINA-TI Spice Model
Herramienta de cálculo

LM20333DESIGN-CALC — Hoja de cálculo de la calculadora LM20333

Diseños de referencia

PMP7804 — Diseño de referencia de potencia de salida múltiple para aplicación Kintex 7

El diseño de referencia PMP7804 proporciona todos los carriles de alimentación necesarios para alimentar la familia de matrices de puertas programables de campo (FPGA) de la serie Xilinx ® Kintex ® 7.  Este diseño utiliza módulos de alimentación Simple Switcher junto con los (...)
Test report: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
HTSSOP (PWP) 20 Ultra Librarian

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

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