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ATL431LI

ACTIVO

Regulador de derivación programable de bajo IQ en un encapsulado DQN ultrapequeño

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TL431 ACTIVO Regulador de derivación de precisión ajustable for cost optimized designs

Detalles del producto

VO (V) 2.5 Initial accuracy (max) (%) 0.5, 1 VO adj (min) (V) 2.5 VO adj (max) (V) 36 Iz for regulation (min) (µA) 80 Reference voltage (V) adjustable Rating Catalog Temp coeff (max) (ppm/°C) 66 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
VO (V) 2.5 Initial accuracy (max) (%) 0.5, 1 VO adj (min) (V) 2.5 VO adj (max) (V) 36 Iz for regulation (min) (µA) 80 Reference voltage (V) adjustable Rating Catalog Temp coeff (max) (ppm/°C) 66 Operating temperature range (°C) -40 to 125 Iout/Iz (max) (mA) 15
SOT-23 (DBZ) 3 6.9204 mm² 2.92 x 2.37 X2SON (DQN) 4 1 mm² 1 x 1
  • Reference voltage tolerance at 25°C
    • 0.5% (B Grade)
    • 1% (A Grade)
  • Minimum typical output voltage: 2.5 V
  • Adjustable output voltage: Vref to 36 V
  • Operation from −40°C to +125°C (Q temp)
  • Maximum temperature drift
    • 17 mV (I Temp)
    • 27 mV (Q Temp)
  • 0.3-Ω Typical output impedance
  • Sink-current capability
    • Imin = 0.08 mA (max)
    • IKA = 15 mA (max)
  • Reference input current IREF: 0.4 µA (max)
  • Deviation of reference input current over temperature, II(dev): 0.3 µA (max)
  • Packages: 1-mm x 1-mm X2SON or SOT23-3
  • Reference voltage tolerance at 25°C
    • 0.5% (B Grade)
    • 1% (A Grade)
  • Minimum typical output voltage: 2.5 V
  • Adjustable output voltage: Vref to 36 V
  • Operation from −40°C to +125°C (Q temp)
  • Maximum temperature drift
    • 17 mV (I Temp)
    • 27 mV (Q Temp)
  • 0.3-Ω Typical output impedance
  • Sink-current capability
    • Imin = 0.08 mA (max)
    • IKA = 15 mA (max)
  • Reference input current IREF: 0.4 µA (max)
  • Deviation of reference input current over temperature, II(dev): 0.3 µA (max)
  • Packages: 1-mm x 1-mm X2SON or SOT23-3

The ATL43xLI device is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.3 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. This device is a pin-to-pin alternative to the TL431LI and TL432LI, with lower minimum operating current to help reduce system power consumption. The ATL432LI device has exactly the same functionality and electrical specifications as the ATL431LI device, but has a different pinout for the DBZ package. The ATL431LI is also offered in a tiny X2SON (1.00 mm x 1.00 mm) package which makes it ideal for space constraint applications.

The ATL431LI device is offered in two grades, with initial tolerances (at 25°C) of 0.5%, and 1%, for the B and A grade, respectively. In addition, low output drift versus temperature ensures good stability over the entire temperature range.

The ATL43xLIxQ devices are characterized for operation from –40°C to +125°C.

The ATL43xLI device is a three-terminal adjustable shunt regulator, with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.3 Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. This device is a pin-to-pin alternative to the TL431LI and TL432LI, with lower minimum operating current to help reduce system power consumption. The ATL432LI device has exactly the same functionality and electrical specifications as the ATL431LI device, but has a different pinout for the DBZ package. The ATL431LI is also offered in a tiny X2SON (1.00 mm x 1.00 mm) package which makes it ideal for space constraint applications.

The ATL431LI device is offered in two grades, with initial tolerances (at 25°C) of 0.5%, and 1%, for the B and A grade, respectively. In addition, low output drift versus temperature ensures good stability over the entire temperature range.

The ATL43xLIxQ devices are characterized for operation from –40°C to +125°C.

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Documentación técnica

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Tipo Título Fecha
* Data sheet ATL431LI / ATL432LI High Bandwidth Low-Iq Programmable Shunt Regulator datasheet (Rev. D) PDF | HTML 21 nov 2019
Application note Optimization of a Shunt Reference for Flyback Converters PDF | HTML 18 oct 2023
Application note Designing Stable Isolated Power Supplies with Shunt Regulators PDF | HTML 29 dic 2022
Application note Shunt Regulator Design Procedures for Secondary Feedback Loop PDF | HTML 02 feb 2021
Analog Design Journal High-power, low-cost, discrete linear pre-regulator for automotive rear lights 21 dic 2020
Application note Precision Current Sources and Sinks Using Voltage References 30 jun 2020
Technical article How modern voltage references help shrink small designs PDF | HTML 01 jun 2020
Application note Extending the Input Voltage Range of the LM5180‐Q1 PSR Flyback for VDA320(LV148) 30 ene 2020
Application note Using the TL431 for Undervoltage and Overvoltage Detection (Rev. A) 11 dic 2019
Selection guide 431 Device Nomenclature (Rev. B) 18 sep 2019
EVM User's guide ATL431LIEVM User's Guide 30 ago 2019
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 jun 2019
Technical article Gain ultra-high power density for 100-W USB Power Delivery adapters PDF | HTML 05 mar 2019
Application note Designing with the ATL431LI 27 nov 2018

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

ATL431EVM-001 — Módulo de evaluación del regulador de derivación ajustable ATL431

The ATL431EVM-001 evaluation module (EVM) features the functionality and adjustability of the ATL431 by letting you program the cathode voltage with various resistor values. You can also set the cathode current using the various resistors in series with the supply. (...)

Guía del usuario: PDF
Placa de evaluación

ATL431LIEVM — Módulo de evaluación de regulador de derivación programable de bajo IQ y ancho de banda alto para en

The ATL431LI evaluation module (EVM) is an adjustable-voltage reference board that evaluates the ATL431LI device in the super-thin small-outline no-lead (X2SON) DQN small-form-factor package.

Guía del usuario: PDF
Modelo de simulación

ATL431LI PSpice Transient Model

SLVMCW7.ZIP (56 KB) - PSpice Model
Modelo de simulación

ATL431LI Unencrypted PSpice Transient Model

SLVMCW6.ZIP (2 KB) - PSpice Model
Modelo de simulación

TL431LI and ATL431LI PSpice Average Model

SLVMCX5.ZIP (78 KB) - PSpice Model
Modelo de simulación

TL431LI and ATL431LI Unencrypted PSpice Average Model

SLVMCX4.ZIP (1 KB) - PSpice Model
Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Diseños de referencia

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Este diseño de referencia es una plataforma CC/CC resonante de medio puente de 1 kW y 400 V a 12 V que se utiliza para evaluar el rendimiento transitorio de carga del control histerético híbrido (HHC) con un microcontrolador F280039C. El HHC es un método que combina el control directo de la (...)
Test report: PDF
Diseños de referencia

TIDA-01623 — Diseño de referencia de adaptador CA/CC de 30 W/in3, 100 W y con una eficiencia del 93.4 %

This fully-tested reference design is a high-efficiency, high-power-density, AC/DC adapter solution with a wide input voltage range (100- to 240-V AC) for laptop adapters and smartphone charger applications. This design consists of a front-end transition-mode (TM) power factor correction (PFC) (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

PMP40586 — Diseño de referencia LLC de 1 kW en modo de corriente con control digital

Este diseño de referencia es una solución de control histerético híbrido (HHC) digital pionera en la industria, dirigida a aplicaciones de fuentes de alimentación de servidores con salida de 12 V a 54 V. Este diseño de referencia muestra las ventajas del control HHC mediante el UCD3138, en una (...)
Test report: PDF
Diseños de referencia

PMP31193 — Diseño de referencia para flyback trifásico con conmutación de entrada de valle de doble salida

Este diseño de referencia utiliza el controlador flyback UCC28742 para producir dos salidas, 23 V a 1.0 A y 5.0 V a 0.15 A, a partir de una entrada trifásica. El UCC28742 utiliza un acoplador óptico para regular la salida y mejorar la respuesta transitoria. La tecnología de conmutación de valle (...)
Test report: PDF
Diseños de referencia

PMP22396 — Diseño de referencia de convertidor boost bidireccional de 2460 W para aplicaciones de sector automo

This reference design is a 2460-W bidirectional boost converter for automotive applications. The circuit is powered from the nominal 12-V battery to provide an output voltage of 48 V at 51.25 A. The design uses two dual-phase synchronous bidirectional controllers operating at a switching frequency (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP30825 — Diseño de referencia de retorno de conmutación de valle con entrada CC de 150 V a 430 V y salida múl

This 10-W non-isolated flyback reference design uses the UCC28742 controller to generate four outputs (5 V at 150 mA, 12 V at 690 mA, 15 V at 80 mA, 18 V at 20 mA). The controller provides constant-voltage and constant-current regulation. Transistors are used in place of an optocoupler feedback (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP22151 — Diseño de referencia de potencia flyback de 70 W y boost de 37 W

This reference design uses two LM5155 devices to make a flyback and boost power stage. The flyback creates an isolated 28 Vdc bus from a 24 +/-10% Vdc bus and the boost creates a 37 Vdc bus from the output of the flyback. The flyback can be loaded up to 70 W and the boost can be loaded up to 37-W. (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP30720 — Diseño de referencia de fuente de alimentación aislada con entrada ultra amplia (CC de 20 V a 375 V)

This reference design uses the UCC28C42 boost controller and the UCC28780 active-clamp flyback controller to generate an isolated output of 24 V at 3.5 A over an ultra-wide input voltage range of 20 V to 375 V. The design also uses the UCC24612 synchronous rectifier controller on the secondary (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP22021 — Diseño de referencia flyback CC/CC aislado y compacto

This reference design uses LM5022-Q1 to make an isolated 3.3-V output capable of 1.1-A from a 9-V to 15-V input. All components are placed on one side of the board to reduce assembly complexity and cost. A secondary filter reduces the output ripple to under 30-mV peak-to-peak. The design can (...)
Test report: PDF
Esquema: PDF
Paquete Pasadores Descargar
SOT-23 (DBZ) 3 Ver opciones
X2SON (DQN) 4 Ver opciones

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

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

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