LM25148

Name: LM25148
Brand: TI
SKU: LM25148
Price: 0.526 USD

現行

具有超低 IQ 的 42-V 同步降壓 DC/DC 控制器

立即訂購

產品規格表

document-pdfAcrobat LM25148 42-V Synchronous Buck DC/DC Controller with Ultra-Low IQ and Dual Random Spread Spectrum datasheet (英文) PDF | HTML

LM25148

現行

產品規格表

立即訂購

產品詳細資料

Vin (min) (V)

3.5

Vin (max) (V)

42

Iout (max) (A)

20

Operating temperature range (°C)

-40 to 150

Control mode

current mode

Topology

Buck Controller

Rating

Catalog

Vout (min) (V)

0.8

Vout (max) (V)

36

Features

Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Load Disconnect, Output discharge, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable

Iq (typ) (µA)

9.5

Duty cycle (max) (%)

99

Number of phases

2

Vin (min) (V)

3.5

Vin (max) (V)

42

Iout (max) (A)

20

Operating temperature range (°C)

-40 to 150

Control mode

current mode

Topology

Buck Controller

Rating

Catalog

Vout (min) (V)

0.8

Vout (max) (V)

36

Features

Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Load Disconnect, Output discharge, Phase Interleaving, Power good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO adjustable

Iq (typ) (µA)

9.5

Duty cycle (max) (%)

99

Number of phases

2

VQFN (RGY)

24

19.25 mm² 5.5 x 3.5

Functional Safety-Capable
- Documentation available to aid functional safety system design
Integrated EMI mitigation
- Selectable dual random spread spectrum (DRSS) feature for enhanced EMI performance across low and high-frequency bands
- Optimized for CISPR 32 Class B requirements
Versatile synchronous buck DC/DC controller
- Wide input voltage range of 3.5 V to 42 V
- 1% accurate, fixed 3.3-V, 5-V, 12-V, or adjustable output from 0.8 V to 36 V
- 150°C maximum junction temperature
- Lossless DCR or shunt current sensing
- Shutdown mode current: 2.3 µA
- No-load sleep current: 9.5 µA
- Internal 3-ms soft-start ramp
- Stackable up to two phases
- Advanced dropout with frequency foldback
- Internal bootstrap diode
Switching frequency from 100 kHz to 2.2 MHz
- SYNC in and SYNC out capability
- Selectable PFM or FPWM modes
Inherent protection features for robust design
- Internal hiccup mode overcurrent protection
- ENABLE and PGOOD functions
- VCC, VDDA, and gate-drive UVLO protection
- Internal or external loop compensation
- Thermal shutdown protection with hysteresis
Create a custom design using the LM25148 with WEBENCH Power Designer

Functional Safety-Capable
- Documentation available to aid functional safety system design
Integrated EMI mitigation
- Selectable dual random spread spectrum (DRSS) feature for enhanced EMI performance across low and high-frequency bands
- Optimized for CISPR 32 Class B requirements
Versatile synchronous buck DC/DC controller
- Wide input voltage range of 3.5 V to 42 V
- 1% accurate, fixed 3.3-V, 5-V, 12-V, or adjustable output from 0.8 V to 36 V
- 150°C maximum junction temperature
- Lossless DCR or shunt current sensing
- Shutdown mode current: 2.3 µA
- No-load sleep current: 9.5 µA
- Internal 3-ms soft-start ramp
- Stackable up to two phases
- Advanced dropout with frequency foldback
- Internal bootstrap diode
Switching frequency from 100 kHz to 2.2 MHz
- SYNC in and SYNC out capability
- Selectable PFM or FPWM modes
Inherent protection features for robust design
- Internal hiccup mode overcurrent protection
- ENABLE and PGOOD functions
- VCC, VDDA, and gate-drive UVLO protection
- Internal or external loop compensation
- Thermal shutdown protection with hysteresis
Create a custom design using the LM25148 with WEBENCH Power Designer

The LM25148 is a 42-V, ultra-low I_Q synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25148 can be set up in interleaved mode (paralleled output) with accurate current sharing for high-current applications. It can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM25148 has a unique EMI reduction feature known as dual random spread spectrum (DRSS). Combining low-frequency triangular and high-frequency random modulations mitigates EMI disturbances across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

The LM25148 is a 42-V, ultra-low I_Q synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM25148 can be set up in interleaved mode (paralleled output) with accurate current sharing for high-current applications. It can operate at input voltages as low as 3.5 V, at nearly 100% duty cycle if needed.

The LM25148 has a unique EMI reduction feature known as dual random spread spectrum (DRSS). Combining low-frequency triangular and high-frequency random modulations mitigates EMI disturbances across lower and higher frequency bands, respectively. This hybrid technique aligns with the multiple resolution bandwidth (RBW) settings specified in industry-standard EMC tests.

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	類型	標題		日期
*	Data sheet	LM25148 42-V Synchronous Buck DC/DC Controller with Ultra-Low IQ and Dual Random Spread Spectrum datasheet	PDF \| HTML	2021年 12月 15日
	Application note	Power Supply Design for AMD Versal™ AI Edge Series	PDF \| HTML	2024年 1月 29日
	Application note	How to Implement a Simple Constant Current Regulation Scheme to a PCM Based Buck	PDF \| HTML	2023年 8月 16日
	User guide	LM25149-Q1 EVM User's Guide (Rev. A)	PDF \| HTML	2022年 4月 29日
	Functional safety information	LM25148 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA	PDF \| HTML	2021年 12月 7日
	E-book	An Engineer’s Guide to Low EMI in DC/DC Regulators		2021年 4月 21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

LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V 至 36-V 低 IQ、同步降壓 DC/DC 控制器評估模組

LM25149-Q1EVM-2100 高密度評估模組 (EVM) 的設計目的在於展示 LM25149-Q1 高性能、車用同步降壓 DC/DC 降壓控制器。此評估模組可以在 5.5 V 至 36 V 的廣泛輸入電壓範圍內運作，可提供高於 1% 設定點準確度，及高達 8-A 輸出電流的固定 5-V 輸出。LM25149-Q1 提供先進 EMI 性能和超低 I_Q。發生故障期間的穩壓器功能包括：電壓過低鎖定、內部緩啟動、Hiccup 模式過電流防護以及過熱自動關機。另外還提供開漏 PGOOD 指示器和 SYNC IN / SYNC OUT 模式功能。

使用指南: PDF | HTML

TI.com 無法提供

開發板

LM5143-Q1EVM-2100 — 雙通道汽車同步降壓控制器評估模組

The LM5143-Q1-EVM2100 high density evaluation module (EVM) is designed to showcase the performance of the LM5143-Q1 high performance, dual-channel, automotive synchronous buck DC/DC buck controller. It operates over a wide input voltage range of 3.5 V to 36 V to deliver fixed 5-V and 3.3-V outputs (...)

使用指南: PDF

TI.com 無法提供

開發板

LM5149-Q1EVM-400 — 搭載主動式 EMI 濾波器的 72-V、低 IQ、同步降壓 DC/DC 控制器的 LM5149-Q1 評估模組

LM5149-Q1EVM-400 高密度評估模組 (EVM) 的設計目的在於展示 LM5149-Q1 高性能、車用同步降壓 DC/DC 降壓控制器。EVM 可在 15 V 至 72 V 的廣泛輸入電壓範圍內運作，可提供高於 1% 設定點準確度，及高達 8-A 輸出電流的固定 12-V 輸出。LM5149-Q1 提供先進的 EMI 性能、超低 IQ 保護功能，可在穩壓器故障狀況下提供防護，包括電壓過低鎖定、內部緩啟動、打嗝模式過電流保護，以及過熱自動關機。該設備還包括開漏 PGOOD 指示器和 SYNC IN 功能。

使用指南: PDF | HTML

TI.com 無法提供

模擬型號

LM25149-Q1 PSpice Transient Model

SNVMC96.ZIP (308 KB) - PSpice Model

下載

計算工具

LM5148-LM25148DESIGN-CALC — LM5148/-Q1 and LM25148/-Q1 controller quickstart design tool

Welcome to the quickstart design tool for the LM5148, LM5148-Q1, LM25148 and LM25148-Q1. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the above controller family. As such, the user can expeditiously arrive at an (...)

支援產品和硬體

產品

AC/DC 和 DC/DC 控制器 (外部 FET)

LM5148 — 3.5-V 至 80-V、電流模式同步降壓轉換器

LM5148-Q1 — 具有超低 I_Q 的車用 80V 同步降壓 DC/DC 控制器

LM25148 — 具有超低 IQ 的 42-V 同步降壓 DC/DC 控制器

LM25148-Q1 — 具有超低 IQ 的車用 42-V 同步降壓 DC/DC 控制器

硬體開發

開發板

LM5149-Q1EVM-400 — 搭載主動式 EMI 濾波器的 72-V、低 IQ、同步降壓 DC/DC 控制器的 LM5149-Q1 評估模組

LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V 至 36-V 低 IQ、同步降壓 DC/DC 控制器評估模組

下載

PCB 佈局

LM25149-Q1EVM-2100 PCB Layout Files

SNVR501.ZIP (1990 KB)

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參考設計

PMP31252 — 適合車用的 150W 雙相同步降壓轉換器參考設計

本設計展示可當成雙輸出轉換器使用的低 EMI、雙相位降壓轉換器。作為雙相轉換器，此電路可提供 22A 的連續輸出電流和 30A 峰值電流，並具備 12V 至 5V 配置。

Test report: PDF

封裝	針腳	CAD 符號、佔位空間與 3D 模型
VQFN (RGY)	24	Ultra Librarian

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LM25148

具有超低 IQ 的 42-V 同步降壓 DC/DC 控制器

LM25148

產品詳細資料

技術文件

設計與開發

LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V 至 36-V 低 IQ、同步降壓 DC/DC 控制器評估模組

LM5143-Q1EVM-2100 — 雙通道汽車同步降壓控制器評估模組

LM5149-Q1EVM-400 — 搭載主動式 EMI 濾波器的 72-V、低 IQ、同步降壓 DC/DC 控制器的 LM5149-Q1 評估模組

LM25149-Q1 PSpice Transient Model

LM5148-LM25148DESIGN-CALC — LM5148/-Q1 and LM25148/-Q1 controller quickstart design tool

支援產品和硬體

產品

AC/DC 和 DC/DC 控制器 (外部 FET)

硬體開發

開發板

LM25149-Q1EVM-2100 PCB Layout Files

PMP31252 — 適合車用的 150W 雙相同步降壓轉換器參考設計

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下載選項

LM5148-LM25148DESIGN-CALC — LM5148/-Q1 and LM25148/-Q1 controller quickstart design tool

AC/DC 和 DC/DC 控制器 (外部 FET)

硬體開發

版本資訊