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LP2989IMMX-5.0 Datasheet

  • LP2989IMMX-5.0

  • Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator For...

  • 614.44KB

  • 19頁

  • NSC

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LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator
For Use with Ceramic Output Capacitors
June 2002
LP2989
Micropower/Low Noise, 500 mA Ultra Low-Dropout
Regulator
For Use with Ceramic Output Capacitors
General Description
The LP2989 is a fixed-output 500 mA precision LDO regu-
lator designed for use with ceramic output capacitors.
Output noise can be reduced to 18碌V (typical) by connecting
an external 10 nF capacitor to the bypass pin.
Using an optimized VIP
鈩?/div>
(Vertically Integrated PNP) pro-
cess, the LP2989 delivers superior performance:
Dropout Voltage:
Typically 310 mV
@
500 mA load, and 1
mV
@
100 碌A(chǔ) load.
Ground Pin Current:
Typically 3 mA
@
500 mA load, and
110 碌A(chǔ)
@
100 碌A(chǔ) load.
Sleep Mode:
The LP2989 draws less than 0.8 碌A(chǔ) quiescent
current when shutdown pin is pulled low.
Error Flag:
The built-in error flag goes low when the output
drops approximately 5% below nominal.
Precision Output:
Guaranteed output voltage accuracy is
0.75% (鈥淎鈥?grade) and 1.25% (standard grade) at room
temperature.
For output voltages
<
2V, see LP2989LV datasheet.
Features
n
n
n
n
n
n
n
n
n
n
n
Ultra low dropout voltage
Guaranteed 500 mA continuous output current
Very low output noise with external capacitor
SO-8, Mini SO-8, 8 Lead LLP surface mount packages
<
0.8 碌A(chǔ) quiescent current when shutdown
Low ground pin current at all loads
0.75% output voltage accuracy (鈥淎鈥?grade)
High peak current capability (800 mA typical)
Wide supply voltage range (16V max)
Overtemperature/overcurrent protection
鈭?0藲C to +125藲C junction temperature range
Applications
n
n
n
n
Notebook/Desktop PC
PDA/Palmtop Computer
Wireless Communication Terminals
SMPS Post-Regulator
Block Diagram
10133901
VIP
鈩?/div>
is a trademark of National Semiconductor Corporation.
漏 2002 National Semiconductor Corporation
DS101339
www.national.com

LP2989IMMX-5.0 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 16 V

  • 5 V

  • 0.003 V at 0.1 mA, 0.2 V at 200 mA, 0.425 V at 500 mA

  • 0.5 A

  • 0.4 %

  • 1

  • Fixed

  • + 125 C

  • SMD/SMT

  • MSOP

  • 0.014 % / V

  • - 40 C

  • Reel

  • 3500

  • +/- 1.25 %

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