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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM2665

現行

1.8V 至 5.5V 切換式電容器電壓倍增器

立即訂購
產品規格表

LM2665

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Iout (max) (A) 0.04 Vin (max) (V) 5.8 Vin (min) (V) 2.5 Vout (max) (V) 11 Vout (min) (V) 1.8 Features Enable, Unregulated Switching frequency (min) (kHz) 40 Switching frequency (max) (kHz) 80 Operating temperature range (°C) -40 to 85 Iq (typ) (µA) 650 Type Charge pump
Rating Catalog Iout (max) (A) 0.04 Vin (max) (V) 5.8 Vin (min) (V) 2.5 Vout (max) (V) 11 Vout (min) (V) 1.8 Features Enable, Unregulated Switching frequency (min) (kHz) 40 Switching frequency (max) (kHz) 80 Operating temperature range (°C) -40 to 85 Iq (typ) (µA) 650 Type Charge pump
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Input Voltage for Voltage Doubler: 2.5 V to 5.5 V
  • Voltage Divider Splits Voltage: 1.8 V to 11 V
  • Doubles or Splits Input Supply Voltage
  • 12-Ω Typical Output Impedance
  • 90% Typical Conversion Efficiency at 40 mA
  • 1-µA Typical Shutdown Current
  • Input Voltage for Voltage Doubler: 2.5 V to 5.5 V
  • Voltage Divider Splits Voltage: 1.8 V to 11 V
  • Doubles or Splits Input Supply Voltage
  • 12-Ω Typical Output Impedance
  • 90% Typical Conversion Efficiency at 40 mA
  • 1-µA Typical Shutdown Current

The LM2665 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of 2.5 V to 5.5 V. Two low-cost capacitors and a diode (needed during start-up) are used in this circuit to provide up to 40 mA of output current. The LM2665 can also work as a voltage divider to split a voltage in the range of 1.8 V to 11 V in half.

The LM2665 operates at 160-kHz oscillator frequency to reduce output resistance and voltage ripple. With an operating current of only 650 µA (operating efficiency greater than 90% with most loads) and
1-µA typical shutdown current, the LM2665 provides ideal performance for battery powered systems.

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

The LM2665 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of 2.5 V to 5.5 V. Two low-cost capacitors and a diode (needed during start-up) are used in this circuit to provide up to 40 mA of output current. The LM2665 can also work as a voltage divider to split a voltage in the range of 1.8 V to 11 V in half.

The LM2665 operates at 160-kHz oscillator frequency to reduce output resistance and voltage ripple. With an operating current of only 650 µA (operating efficiency greater than 90% with most loads) and
1-µA typical shutdown current, the LM2665 provides ideal performance for battery powered systems.

For all available packages, see the orderable addendum at the end of the data sheet.
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類型 標題 日期
* Data sheet LM2665 Switched Capacitor Voltage Converter datasheet (Rev. H) PDF | HTML 2016年 3月 22日
White paper The Forgotten Converter 2015年 6月 15日
More literature Die D/S LM2665 MDA Switched Capacitor Voltage Converter 2012年 9月 20日

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參考設計

PMP31404 — 3V 至 42V 同步 GaN 升壓轉換器參考設計

這款參考設計旨在實現高升壓比與高效率。這款設計可在寬廣的輸入電壓範圍內運作，最低輸入電壓為 3V，此電壓由內建氮化鎵 (GaN) 場效電晶體 (FET) 的 LMG5126 升壓轉換器提供。這款參考設計具備多項功能，例如展頻、電流限制、過熱自動開機、過電壓保護及欠壓鎖定。
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