LM3485

現行

4.5-35V、磁滯非同步 PFET 降壓控制器

立即訂購

產品規格表

document-pdfAcrobat LM3485 Hysteretic PFET Buck Controller datasheet (Rev. H) (英文) PDF | HTML

現在提供此產品的更新版本

open-in-new

比較替代產品

功能相同，但針腳輸出與所比較的裝置不同。

LM25148

現行

具有超低 IQ 的 42-V 同步降壓 DC/DC 控制器 Improved EMI performance with QFN package and dual random spread spectrum.

LM3485

現行

立即訂購

產品詳細資料

Rating

Catalog

Topology

Buck Controller

Iout (max) (A)

10

Vin (max) (V)

35

Vin (min) (V)

4.5

Vout (max) (V)

35

Vout (min) (V)

1.242

Control mode

Hysteretic

Features

Enable

Duty cycle (max) (%)

100

Iq (typ) (A)

0.00025

Number of phases

1

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Topology

Buck Controller

Iout (max) (A)

10

Vin (max) (V)

35

Vin (min) (V)

4.5

Vout (max) (V)

35

Vout (min) (V)

1.242

Control mode

Hysteretic

Features

Enable

Duty cycle (max) (%)

100

Iq (typ) (A)

0.00025

Number of phases

1

Operating temperature range (°C)

-40 to 125

VSSOP (DGK)

8

14.7 mm² (3 mm × 4.9 mm)

Easy-to-Use Control Methodology
No Control-Loop Compensation Required
4.5-V to 35-V Wide Input Range
1.242-V to V_IN Adjustable Output Range
High Efficiency 93%
±1.3% (±2% Over Temp) Internal Reference
100% Duty Cycle
Maximum Operating Frequency > 1 MHz
Current Limit Protection

Easy-to-Use Control Methodology
No Control-Loop Compensation Required
4.5-V to 35-V Wide Input Range
1.242-V to V_IN Adjustable Output Range
High Efficiency 93%
±1.3% (±2% Over Temp) Internal Reference
100% Duty Cycle
Maximum Operating Frequency > 1 MHz
Current Limit Protection

The LM3485 is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low-cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control-loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultralow dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.

Current limit protection is provided by measuring the voltage across the R_DS(ON) of the PFET, thus eliminating the need for a sense resistor. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

The LM3485 is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low-cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control-loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultralow dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.

Current limit protection is provided by measuring the voltage across the R_DS(ON) of the PFET, thus eliminating the need for a sense resistor. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

filter

尋找其它 DC/DC 控制器

下載觀看有字幕稿的影片影片

技術文件

找不到結果。請清除您的搜尋條件，然後再試一次。

檢視所有 4

重要文件	類型	標題	格式選項
*	資料表	LM3485 Hysteretic PFET Buck Controller datasheet (Rev. H)	PDF \| HTML	2015/12/28
	類比設計期刊	Control-Mode Quick Reference Guide (Rev. B)	PDF \| HTML	2023/8/29
	選擇指南	Power Management Guide 2018 (Rev. R)		2018/6/25
	類比設計期刊	Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics		2016/7/21

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

LM3485EVAL — 磁滯 PFET 降壓控制器評估模組

Hysteretic PFET Buck Controller

使用指南: PDF

支援產品和硬體

有庫存

限制：

登入以進行訂購

lock

登入以檢視庫存

??asset.out-of-stock-ti_zh_TW??

無法提供

開發板

LM3485LED-EVAL — 磁滯 PFET 降壓控制器

The LM3485 LED driver board is a buck regulator derived controlled current source designed to drive high power, high brightness LEDs (HBLEDs) such as the Luxeon™ Emitter at dissipations of 1W to 5W. The board can accept an input voltage ranging from 5V to 30V and can control the output current (...)