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LM2787BPX Datasheet

  • LM2787BPX

  • Low Noise Regulated Switched Capacitor Voltage

  • 207.33KB

  • 8頁

  • NSC

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LM2787 Low Noise Regulated Switched Capacitor Voltage Inverter in micro SMD
August 2002
LM2787
Low Noise Regulated Switched Capacitor Voltage
Inverter in micro SMD
General Description
The LM2787 CMOS Negative Regulated Switched Capacitor
Voltage Inverter delivers a very low noise adjustable output
for an input voltage in the range of +2.7V to +5.5V. Four low
cost capacitors are used in this circuit to provide up to 10mA
of output current. The regulated output for the LM2787 is
adjustable between 鈭?.5V and 鈭?.2V. The LM2787 operates
at 260 kHz (typical) switching frequency to reduce output
resistance and voltage ripple. With an operating current of
only 400 碌A(chǔ) (charge pump power efficiency greater than
90% with most loads) and 0.05 碌A(chǔ) typical shutdown current,
the LM2787 provides ideal performance for cellular phone
power amplifier bias and other low current, low noise nega-
tive voltage needs. The device comes in a small 8-Bump
micro SMD package.
Features
n
n
n
n
n
Inverts and regulates the input supply voltage
Small 8-Bump micro SMD package
91% typical charge pump power efficiency at 10mA
Low output ripple
Shutdown lowers Quiescent current to 0.05 碌A(chǔ) (typical)
Applications
n
n
n
n
n
Wireless Communication Systems
Cellular Phone Power Amplifier Biasing
Interface Power Supplies
Handheld Instrumentation
Laptop Computers and PDA鈥檚
Typical Application Circuit and Connection Diagram
10131325
8-Bump micro SMD (Top View)
10131302
漏 2002 National Semiconductor Corporation
DS101313
www.national.com

LM2787BPX 產(chǎn)品屬性

  • 3,000

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器

  • -

  • 切換式電容器（充電泵），反相

  • 可調(diào)式

  • 1

  • -1.5 V ~ -5.2 V

  • 2.7 V ~ 5.5 V

  • -

  • 260kHz

  • 10mA

  • 無

  • -40°C ~ 85°C

  • 表面貼裝

  • 8-VFBGA

  • 帶卷 (TR)

  • 8-uSMD

  • LM2787BPEV-ND - BOARD EVALUATION LM2787BP

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