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LM3880-Q1

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具固定時間延遲的汽車級 3 軌簡單電源序列器

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LM3880-Q1

現行
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產品詳細資料

Supply voltage (min) (V) 2.7 Number of supplies monitored 3 Supply voltage (max) (V) 5.5 Iq (typ) (mA) 0.025 Time delay (ms) 2, 10, 16, 30, 60, 120 Number of sequenced outputs 3 Rating Automotive Operating temperature range (°C) -40 to 125
Supply voltage (min) (V) 2.7 Number of supplies monitored 3 Supply voltage (max) (V) 5.5 Iq (typ) (mA) 0.025 Time delay (ms) 2, 10, 16, 30, 60, 120 Number of sequenced outputs 3 Rating Automotive Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade: –40°C to 125°C junction uemperature range
  • Simple solution for sequencing three voltage rails from a single input signal
  • Easily cascade up to three devices to sequence as many as nine voltage rails
  • Powerup and powerdown control
  • Tiny 2.9-mm x 1.6-mm footprint
  • Low quiescent current: 25 µA
  • Input voltage range: 2.7 V to 5.5 V
  • Standard timing options available
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade: –40°C to 125°C junction uemperature range
  • Simple solution for sequencing three voltage rails from a single input signal
  • Easily cascade up to three devices to sequence as many as nine voltage rails
  • Powerup and powerdown control
  • Tiny 2.9-mm x 1.6-mm footprint
  • Low quiescent current: 25 µA
  • Input voltage range: 2.7 V to 5.5 V
  • Standard timing options available

The LM3880-Q1 simple power supply sequencer offers the easiest method to control powerup sequencing and powerdown sequencing of multiple Independent voltage rails. By staggering the startup sequence, it is possible to avoid latch conditions or large in-rush currents that can affect the reliability of the system.

Available in a 6-pin SOT-23 package, the simple sequencer contains a precision enable pin and three open-drain output flags. The open-drain output flags permit that they can be pulled up to distinct voltage supplies separate from the sequencer VDD (only if they do not exceed the recommended maximum voltage of 0.3 V greater than VDD), so as to interface with ICs requiring a range of different enable signals. When the LM3880-Q1 is enabled, the three output flags sequentially release, after individual time delays, thus permitting the connected power supplies to start up. The output flags follow a reverse sequence during power down to avoid latch conditions.

EPROM capability allows every delay and sequence to be fully adjustable. Contact Texas Instruments to request a non-standard configuration.

The LM3880-Q1 simple power supply sequencer offers the easiest method to control powerup sequencing and powerdown sequencing of multiple Independent voltage rails. By staggering the startup sequence, it is possible to avoid latch conditions or large in-rush currents that can affect the reliability of the system.

Available in a 6-pin SOT-23 package, the simple sequencer contains a precision enable pin and three open-drain output flags. The open-drain output flags permit that they can be pulled up to distinct voltage supplies separate from the sequencer VDD (only if they do not exceed the recommended maximum voltage of 0.3 V greater than VDD), so as to interface with ICs requiring a range of different enable signals. When the LM3880-Q1 is enabled, the three output flags sequentially release, after individual time delays, thus permitting the connected power supplies to start up. The output flags follow a reverse sequence during power down to avoid latch conditions.

EPROM capability allows every delay and sequence to be fully adjustable. Contact Texas Instruments to request a non-standard configuration.
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類型 標題 日期
* Data sheet LM3880-Q1 Simple Power Sequencer datasheet (Rev. A) 2021年 2月 26日
Technical article The need for sequencing in automotive applications PDF | HTML 2018年 1月 30日
Technical article Improving DDR Memory Performance in Automotive Applications PDF | HTML 2017年 6月 22日
Analog Design Journal Power-supply sequencing for FPGAs 2014年 10月 24日
EVM User's guide AN-1491 LM3880 Power Sequencer Demo Board (Rev. A) 2013年 5月 7日
Application note LM1771 and LM3880 Based FPGA Power Supply Reference Design (Rev. A) 2013年 5月 5日
Application note AN-1603 LM274X Reference Designs (Rev. C) 2013年 5月 1日
Application note Power Supply Design Considerations for Modern FPGAs (Power Designer 121) 2010年 2月 2日

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開發板

LM3880EVAL — 電源序列器

The LM3880 evaluation board has been designed to connect directly to the power supplies of an existing system to enable sequencing. Upon enabling the device, the three open drain output flags will rise in sequential order, 1-2-3. Once the part is disabled, the shutdown sequence will occur in (...)

使用指南: PDF
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

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 (...)
要求
參考設計

TIDA-00803 — 適用於前置攝影機系統且採用單核電壓應用處理器的車用電源設計

This reference design provides a broadly-applicable automotive power design for a variety of ADAS processors, focusing on front and rear camera applications. The design supports an input range of 4 V to 48 V to supply common processor power rails through discrete components.  This adds to the (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00530 — 適用於低功耗 TDA3x 系統的車用電源參考設計

This solution was designed to make an integrated, size-optimized power design for ADAS applications using the TDA3x SoC off of an automotive battery input.  By targeting only applications with lower processing needs, we’re able to choose devices and components which are smaller, compared (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00346 — 適用於入門級核心應用處理器架構 ADAS 系統的成本最佳化電源供應器解決方案

The TIDA-00346 design provides the power supply rails necessary for typical  entry-level application processors in automotive advanced driver assistance systems (ADAS) applications.  The design uses several individual DC/DC voltage regulators as well as load switches and linear regulators (...)
Test report: PDF
電路圖: PDF
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