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LM2753

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高功率开关电容器电压转换器/LED 闪光灯驱动器

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LM2753

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产品详情

Input voltage type Linear Topology Charge pump Vin (min) (V) 3 Vin (max) (V) 5.5 Vout (max) (V) 5 Vout (min) (V) 5 Iout (max) (A) 0.4 Iq (typ) (mA) 0.06 Features Enable Operating temperature range (°C) -40 to 85 Number of channels 1 Rating Catalog
Input voltage type Linear Topology Charge pump Vin (min) (V) 3 Vin (max) (V) 5.5 Vout (max) (V) 5 Vout (min) (V) 5 Iout (max) (A) 0.4 Iq (typ) (mA) 0.06 Features Enable Operating temperature range (°C) -40 to 85 Number of channels 1 Rating Catalog
WSON (DSC) 10 9 mm² 3 x 3
  • Input Voltage Range: 3 V to 5.5 V
  • Regulated 5-V Output
  • 250-mA Output Current With a 3.6-V Input
  • 400-mA Pulsed Output Current
    (up to 500-ms Duration)
  • 60-µA (Typical) Quiescent Current
  • Pulse-Frequency Modulation (PFM) Regulation
  • Inductor-Less Solution: Requires Only Three Small Capacitors
  • < 1-µA Typical Shutdown Current
  • 10-pin WSON Package (No Pullback):
    • 3 mm × 3 mm × 0.8 mm
  • Input Voltage Range: 3 V to 5.5 V
  • Regulated 5-V Output
  • 250-mA Output Current With a 3.6-V Input
  • 400-mA Pulsed Output Current
    (up to 500-ms Duration)
  • 60-µA (Typical) Quiescent Current
  • Pulse-Frequency Modulation (PFM) Regulation
  • Inductor-Less Solution: Requires Only Three Small Capacitors
  • < 1-µA Typical Shutdown Current
  • 10-pin WSON Package (No Pullback):
    • 3 mm × 3 mm × 0.8 mm

The LM2753 is capable of driving a flash LED with a pulsed current of 400 mA at an input voltage of 3.6 V. A switched-capacitor doubler, the LM2753 provides a regulated 5-V output (VOUT) over an input supply range of 3 V to 5.5 V. The switched output, IOUT, takes less than 10 ns to turn on and provide maximum current to a flash LED. Flash LED current is set via a ballast resistor. Continuous illumination current (torch mode) is programmed by connecting a resistor between IOUT and VOUT. This device uses only three small, low-cost ceramic capacitors.

The LM2753 device uses pulse frequency modulation (PFM) regulation. Typical operating frequency is 725 kHz. Under no-load conditions, the LM2753 operates on only 60 µA. If the output is connected to ground, the charge pump stays in the gain of 1, which helps limit the input current to 300 mA (typical).

For all available packages, see the orderable addendum at the end of the data sheet.

The LM2753 is capable of driving a flash LED with a pulsed current of 400 mA at an input voltage of 3.6 V. A switched-capacitor doubler, the LM2753 provides a regulated 5-V output (VOUT) over an input supply range of 3 V to 5.5 V. The switched output, IOUT, takes less than 10 ns to turn on and provide maximum current to a flash LED. Flash LED current is set via a ballast resistor. Continuous illumination current (torch mode) is programmed by connecting a resistor between IOUT and VOUT. This device uses only three small, low-cost ceramic capacitors.

The LM2753 device uses pulse frequency modulation (PFM) regulation. Typical operating frequency is 725 kHz. Under no-load conditions, the LM2753 operates on only 60 µA. If the output is connected to ground, the charge pump stays in the gain of 1, which helps limit the input current to 300 mA (typical).

For all available packages, see the orderable addendum at the end of the data sheet.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM2753 High-Power Switched-Capacitor Voltage Converter and Flash LED Driver 数据表 (Rev. F) PDF | HTML 2016年 9月 9日
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020年 9月 21日

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