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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM26420-Q1

現行

符合汽車標準的雙 2A 高效同步 DC/DC 轉換器

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TPS62442-Q1 現行 車用 2.75-V 至 6-V、雙 2-A 或 3-A 和 1-A 輸出、可調頻率、降壓轉換器 Next generation dual buck with smaller size wand broader VIN range.

LM26420-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 550 Switching frequency (max) (kHz) 2200 Features Enable, Light Load Efficiency, Light load efficiency, Phase Interleaving, Power good, Pre-Bias Start-Up, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 4.5 Iq (typ) (µA) 900 Duty cycle (max) (%) 98
Rating Automotive Operating temperature range (°C) -40 to 125 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 550 Switching frequency (max) (kHz) 2200 Features Enable, Light Load Efficiency, Light load efficiency, Phase Interleaving, Power good, Pre-Bias Start-Up, Synchronous Rectification Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 4.5 Iq (typ) (µA) 900 Duty cycle (max) (%) 98
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4 WQFN (RUM) 16 16 mm² 4 x 4
  • Qualified for automotive applications
  • AEC Q100-qualified with the following results:
    • Device temperature grade 0 (Q0): –40°C to +150°C ambient operating temperature
    • Device temperature grade 1 (Q1): –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Compliant with CISPR25 class 5 conducted emissions
  • Input voltage range of 3V to 5.5V
  • Output voltage range of 0.8V to 4.5V
  • 2A output current per regulator
  • Fixed 2.2MHz switching frequency
  • 0.8V, 1.5% Internal voltage reference
  • Internal soft start
  • Independent power good and precision enable for each output
  • Current mode, PWM operation
  • Thermal shutdown
  • Overvoltage protection
  • Start-up into prebiased output loads
  • Regulators are 180° out of phase
  • Create a custom design using the LM26420-Q1 with the WEBENCH Power Designer
  • Qualified for automotive applications
  • AEC Q100-qualified with the following results:
    • Device temperature grade 0 (Q0): –40°C to +150°C ambient operating temperature
    • Device temperature grade 1 (Q1): –40°C to +125°C ambient operating temperature
  • Functional Safety-Capable
  • Compliant with CISPR25 class 5 conducted emissions
  • Input voltage range of 3V to 5.5V
  • Output voltage range of 0.8V to 4.5V
  • 2A output current per regulator
  • Fixed 2.2MHz switching frequency
  • 0.8V, 1.5% Internal voltage reference
  • Internal soft start
  • Independent power good and precision enable for each output
  • Current mode, PWM operation
  • Thermal shutdown
  • Overvoltage protection
  • Start-up into prebiased output loads
  • Regulators are 180° out of phase
  • Create a custom design using the LM26420-Q1 with the WEBENCH Power Designer

The LM26420-Q1 regulator is a monolithic, high-efficiency dual PWM step-down DC/DC converter. This device has the ability to drive two 2A loads with an internal 75mΩ MOS top switch and an internal 50mΩ MOS bottom switch using state-of-the-art BICMOS technology results in the best power density available. The world-class control circuitry allow on times as low as 30ns, thus supporting exceptionally high-frequency conversion over the entire 3V to 5.5V input operating range down to the minimum output voltage of 0.8V.

Although the operating frequency is high, efficiencies up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low standby current. The LM26420-Q1 uses current-mode control and internal compensation to provide high performance regulation over a wide range of operating conditions.

Because the switching frequency is made sure to be greater than 2MHz, the LM26420-Q1 can be used in automotive applications without causing interference in the AM frequency band.

The LM26420-Q1 regulator is a monolithic, high-efficiency dual PWM step-down DC/DC converter. This device has the ability to drive two 2A loads with an internal 75mΩ MOS top switch and an internal 50mΩ MOS bottom switch using state-of-the-art BICMOS technology results in the best power density available. The world-class control circuitry allow on times as low as 30ns, thus supporting exceptionally high-frequency conversion over the entire 3V to 5.5V input operating range down to the minimum output voltage of 0.8V.

Although the operating frequency is high, efficiencies up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low standby current. The LM26420-Q1 uses current-mode control and internal compensation to provide high performance regulation over a wide range of operating conditions.

Because the switching frequency is made sure to be greater than 2MHz, the LM26420-Q1 can be used in automotive applications without causing interference in the AM frequency band.
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類型 標題 日期
* Data sheet LM26420-Q1 Dual 2A , Automotive-Qualified , High-Efficiency Synchronous DC/DC Converter datasheet (Rev. C) PDF | HTML 2024年 11月 27日
Functional safety information LM26420-Q1 Functional Safety, FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 2024年 11月 27日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
Test report Automotive Wide-VIN to Point-of-Load Power Supply Reference Design (Rev. A) 2020年 3月 26日
Technical article Build a sub-20W CISPR25 Class 5 power design for automotive infotainment processor PDF | HTML 2017年 5月 2日
Technical article Spread Spectrum: Headache tablet or vitamin pill? PDF | HTML 2015年 5月 18日
EVM User's guide AN-1870 LM26420 Evaluation Board (Rev. B) 2013年 4月 24日
Application note AN-1973 Benefits and Challenges of High-Frequency Regulators (Rev. A) 2013年 4月 23日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM26420XMHEVAL — LM26420 2.2 MHz、eTSSOP 同步降壓評估板

The LM26420 Evaluation board was designed to provide two 2A outputs, VOUT1 and VOUT2 . It is available in either the eTSSOP package option of the LM26420 for easier probing or the LLP version for evaluating the smaller package. The design emphasizes on the compactness of the LM26420 PCB layout and (...)

使用指南: PDF
TI.com 無法提供
開發板

LM26420XSQEVAL — LM26420 2.2 MHz、LLP 同步降壓評估板

The LM26420 Evaluation board was designed to provide two 2A outputs, VOUT1 and VOUT2 . It is available in either the eTSSOP package option of the LM26420 for easier probing or the LLP version for evaluating the smaller package. The design emphasizes on the compactness of the LM26420 PCB layout and (...)

使用指南: PDF
TI.com 無法提供
開發板

TPS92662AEVM6-104 — TPS92662A-Q1 六通道矩陣評估模組

TPS92662AEVM6-104 包含 66 個獨立控制的 LED，配置爲六通道應用程式。此評估模組顯示 TPS92662A-Q1 LED 矩陣管理裝置的多功能性和可配置性。使用搭配的控制 PCB、6CHAUTOECU-899 和 TPS92662AEVM 軟體套件，可評估完整控制的動態前方照明系統。
要求
參考設計

TIDA-00746 — 適用於車載資訊娛樂系統處理器電源的 17W 系統級電源參考設計

TIDA-00746 is a 17W system-optimized SMPS design for automotive infotainment processor power. The design has been tested for and passed CISPR25 Class 5 conducted EMI  limits.  All buck converters used in this design is switching above AM band (>1.85MHz).

The design is divided into four major blocks:
  1. (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-050040 — 適用於鹵素替換參考設計的車用 LED 車頭燈驅動器模組

This reference design showcases the TPS92682 and the TPS92520 as a fully self functional three-channel LED driver for headlight applications.  The design is intended to be a low-cost halogen headlight module replacement compatible with an automotive body control module.  The three LED (...)
Design guide: PDF
電路圖: PDF
參考設計

PMP15023 — 具有前端電路保護功能的車用寬 VIN 至負載點電源供應參考設計

This automotive point-of-load power supply reference design features complete front-end protection in a small overall solution size. The system can clamp fast high-voltage electrical transients and maintain operation through these events. It can also properly respond to a reverse battery polarity (...)
Test report: PDF
電路圖: PDF
參考設計

TIDA-050030 — 120W 雙級矩陣相容汽車頭燈 ECU 參考設計

This reference design details a headlight ECU using an interleaved boost in voltage regulation mode feeding four synchronous buck channels. This design is also capable of matrix headlight control and is mounted to a heatsink and enclosure to emulate an automotive headlight ECU. The TPS92682-Q1 is (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01524 — 車用高效率電源前端和多相位處理器供電參考設計

This processor supply reference design is an automotive power solution for use in highperformance, single-core-voltage application processors in advanced driver assistance systems (ADASs). This design can support core supply currents up to 10 A at 0.9 V. The design can also operate with a wide (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01492 — 整合電源前端和多相位處理器供電車用參考設計

This processor supply reference design is an automotive power solution for use in high performance, single-core-voltage application processors in advanced driver assistance systems (ADASs). This design can support core supply currents up to 10 A at 0.9 V. The design can also operate with a wide (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00804 — 車用 i.MX6 四核處理器電源參考設計

The TIDA-00804 reference design is a low-cost discrete power solution for the i.MX6Q quad core application processor. All the DCDC regulators operate at frequencies above the AM radio broadcast band to avoid interference with the radio and to provide a small solution size due to smaller filter (...)
Design guide: PDF
電路圖: PDF
參考設計

PMP10652 — 具備所有必要汽車防護之 30W ADAS 系統的系統級參考設計

PMP10652 is a System optimized (CISPR 25 Class 3) 30W design for Surround View ADAS system.

The design has various protections such as Load dump through TVS (ISO pulse testing), Reverse Voltage (Innovative Smart diode with very low Iq), Battery Disconnect Switch with OVP protection (PFET) and is EMI (...)

Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 20 Ultra Librarian
WQFN (RUM) 16 Ultra Librarian
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