LM3673 - 2MHz、350mA 降压 DC-DC 转换器

LM3673是TI德州仪器公司的一款转换器（集成开关）产品，LM3673是2MHz、350mA 降压 DC-DC 转换器，本站介绍了LM3673的封装应用图解、特点和优点、功能等，并给出了与LM3673相关的TI元器件型号供参考。

LM3673 - 2MHz、350mA 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
350-mA Maximum Load Capability
2-MHz PWM Fixed Switching Frequency (Typical)
Automatic PFM/PWM Mode Switching
Available in Fixed and Adjustable Output Voltages
Internal Synchronous Rectification for High Efficiency
Internal Soft Start
0.01-µA Typical Shutdown Current
Operates From a Single Li-Ion Cell Battery
Current Overload and Thermal Shutdown Protection
Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors)

产品应用

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

产品说明

The LM3673 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 350-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 ranging from 1.1 V to 3.3 V.

The device offers superior features and performance for mobile phones and similar portable systems. The LM3673 uses intelligent automatic switching between pulse width modulation (PWM) and pulse frequency modulation (PFM) for better efficiency. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typical). Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typical) 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 (typical).

The LM3673 is available in a tiny 5-pin DSBGA package. A high switching frequency of 2 MHz (typical) allows the use of three tiny surface-mount components: an inductor and two ceramic capacitors.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (MAX)
LM3673	DSBGA (5)	1.413 mm × 1.083 mm

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