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LP3995ITL-3.0 Datasheet

  • LP3995ITL-3.0

  • Micropower 150mA CMOS Voltage Regulator with Active Shutdown

  • 353.38KB

  • 14頁

  • NSC

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LP3995 Micropower 150mA CMOS Voltage Regulator with Active Shutdown
August 2004
LP3995
Micropower 150mA CMOS Voltage Regulator with Active
Shutdown
General Description
The LP3995 linear regulator is designed to meet the require-
ments of portable battery-powered applications and will pro-
vide an accurate output voltage with low noise and low
quiescent current. Ideally suited for powering RF/Analog
devices, this device will also be used to meet more general
circuit needs in which a fast turn-off is essential.
For battery powered applications the low dropout and low
ground current provided by the device allows the lifetime of
the battery to be maximized. The Enable(/Disable) control
allows the system to further extend the battery lifetime by
reducing the power consumption to virtually zero.
The Enable(/Disable) function on the device incorporates an
active discharge circuit on the output for faster device shut-
down. Where the fast turn-off is not required the LP3999
linear regulator is recommended.
The LP3995 also features internal protection against short-
circuit currents and over-temperature conditions.
The LP3995 is designed to be stable with small 1.0 碌F
ceramic capacitors. The small outline of the LP3995 micro
SMD package with the required ceramic capacitors can
realize a system application within minimal board area.
Performance is specified for a 鈭?0藲C to +125藲C temperature
range.
The device is available in micro SMD package and LLP
package. For other package options contact your local NSC
sales office.
The device is available in fixed output voltages in the ranges
1.5V to 3.3V. For availability, please contact your local NSC
sales office.
Key Specifications
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2.5V to 6.0V Input Range
Accurate Output Voltage;
鹵
75mV / 2%
60 mV Typical Dropout with 150 mA Load
Virtually Zero Quiescent Current when Disabled
Low Output Voltage Noise
Stable with a 1 碌F Output Capacitor
Guaranteed 150 mA Output Current
Fast Turn-on; 30 碌s (Typ.)
Fast Turn-off; 175 碌s (Typ.)
Features
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5 pin micro SMD Package
6 pin LLP Package
Stable with Ceramic Capacitor
Logic Controlled Enable
Fast Turn-on
Active Disable for Fast Turn-off.
Thermal-overload and Short-circuit Protection
鈭?0 to +125藲C Junction Temperature Range for
Operation
Applications
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GSM Portable Phones
CDMA Cellular Handsets
Wideband CDMA Cellular Handsets
Bluetooth Devices
Portable Information Appliances
Typical Application Circuit
20034901
漏 2004 National Semiconductor Corporation
DS200349
www.national.com

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