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LM2681M6X Datasheet

  • LM2681M6X

  • Switched Capacitor Voltage Converter

  • 9頁(yè)

  • NSC

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LM2681 Switched Capacitor Voltage Converter
March 1999
LM2681
Switched Capacitor Voltage Converter
General Description
The LM2681 CMOS charge-pump voltage converter oper-
ates as a voltage doubler for an input voltage in the range of
+2.5V to +5.5V. Two low cost capacitors and a diode
(needed during start-up) is used in this circuit to provide up
to 20 mA of output current. The LM2681 can also work as a
voltage divider to split a voltage in the range of +1.8V to
+11V in half.
The LM2681 operates at 160 kHz oscillator frequency to re-
duce output resistance and voltage ripple. With an operating
current of only 550 碌A(chǔ) (operating efficiency greater than 90%
with most loads) the LM2681 provides ideal performance for
battery powered systems. The device is in SOT-23-6 pack-
age.
Features
n
n
n
n
Doubles or Splits Input Supply Voltage
SOT23-6 Package
15鈩?Typical Output Impedance
90% Typical Conversion Efficiency at 20 mA
Applications
n
n
n
n
n
n
Cellular Phones
Pagers
PDAs
Operational Amplifier Power Suppliers
Interface Power Suppliers
Handheld Instruments
Basic Application Circuits
Voltage Doubler
DS100965-1
Splitting V
in
in Half
DS100965-2
漏 1999 National Semiconductor Corporation
DS100965
www.national.com

LM2681M6X 產(chǎn)品屬性

  • 3,000

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器

  • -

  • 切換式電容器（充電泵），分配器，倍增器

  • 可調(diào)式

  • 1

  • 1.8 V ~ 11 V

  • 2.5 V ~ 5.5 V

  • -

  • 80kHz

  • 20mA

  • 無(wú)

  • -40°C ~ 85°C

  • 表面貼裝

  • SOT-23-6

  • 帶卷 (TR)

  • SOT-23-6

  • LM2681M6XTR

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