LM3671 - 2MHz、600mA 降压 DC-DC 转换器

LM3671是TI德州仪器公司的一款转换器（集成开关）产品，LM3671是2MHz、600mA 降压 DC-DC 转换器，本站介绍了LM3671的封装应用图解、特点和优点、功能等，并给出了与LM3671相关的TI元器件型号供参考。

LM3671 - 2MHz、600mA 降压 DC-DC 转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

16-µA Typical Quiescent Current
600-mA Maximum Load Capability
2-MHz PWM Fixed Switching Frequency (Typ.)
Automatic PFM/PWM Mode Switching
Internal Synchronous Rectification for High Efficiency
Internal Soft Start
0.01-µA Typical Shutdown Current
Operates from a Single Li-Ion Cell Battery
Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors)
Current Overload and Thermal Shutdown Protection
Available in Fixed Output Voltages and Adjustable Version
LM3671-Q1 is an AEC-Q100 Grade 1 Qualified Automotive Grade Product

产品应用

Mobile Phones
PDAs
MP3 Players
W-LAN
Portable Instruments
Digital Still Cameras
Portable Hard Disk Drives
Automotive

产品说明

The LM3671 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7 V to 5.5 V. It provides up to 600-mA load current, over the entire input voltage range. There are several different fixed voltage output options available as well as an adjustable output voltage version range from 1.1 V to 3.3 V.

The device offers superior features and performance for mobile phones and similar portable systems. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typ.). Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typ.) during light load and standby operation. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typ.).

A high-switching frequency of 2 MHz (typ.) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor, and two ceramic capacitors, are required.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE
LM3671	USON (6)	2.00 mm x 2.00 mm (NOM)
LM3671 LM3671-Q1	SOT-23 (5)	2.90 mm x 1.60 mm (NOM)
LM3671 LM3671-Q1	DSBGA (5)	1.413 mm x 1.083 mm (MAX)

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