LT3684 - LT3684是36V, 2A, 2.8MHz Step-Down Switching Regulator

LT3684是LINEAR凌力尔特公司的一款内部开关电源降压产品，LT3684是LT3684是36V, 2A, 2.8MHz Step-Down Switching Regulator，本站介绍了LT3684的封装应用图解、特点和优点、功能等，并给出了与LT3684相关的LINEAR元器件型号供参考。

LT3684 - LT3684是36V, 2A, 2.8MHz Step-Down Switching Regulator - 内部开关电源降压 - 电源管理 - 凌力尔特

LT3684 - 36V, 2A, 2.8MHz Step-Down Switching Regulator

LT3684 - 36V, 2A, 2.8MHz Step-Down Switching Regulator - Linear Technology（凌力尔特）

功能描述

The LT3684 is an adjustable frequency (300kHz to 2.8MHz) monolithic buck switching regulator that accepts input voltages up to 34V (36V maximum). A high efficiency 0.18Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability. The LT3684’s high operating frequency allows the use of small, low cost inductors and ceramic capacitors resulting in low output ripple while keeping total solution size to a minimum. The low current shutdown mode reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 90% of the programmed output voltage. The LT3684 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with Exposed Pads for low thermal resistance.

特点

Wide Input Range: 3.6V to 34V Operating, 36V Maximum

2A Maximum Output Current

Adjustable Switching Frequency: 300kHz to 2.8MHz

Low Shutdown Current: IQ < 1µA

Integrated Boost Diode

Power Good Flag

Saturating Switch Design: 0.18Ω On-Resistance

1.265V Feedback Reference Voltage

Output Voltage: 1.265V to 20V

Soft-Start Capability

Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages

应用

Automotive Battery Regulation

Power for Portable Products

Distributed Supply Regulation

Industrial Supplies

Wall Transformer Regulation

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LT3684EDD#PBF	3x3 DFN-10	E	$4.21	$2.95
LT3684EDD#TRPBF	3x3 DFN-10	E		$3.01
LT3684EMSE#PBF	MS-10E	E	$4.36	$3.05
LT3684EMSE#TRPBF	MS-10E	E		$3.11
LT3684IDD#PBF	3x3 DFN-10	I	$5.06	$3.54
LT3684IDD#TRPBF	3x3 DFN-10	I		$3.60
LT3684IMSE#PBF	MS-10E	I	$5.20	$3.64
LT3684IMSE#TRPBF	MS-10E	I		$3.70

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