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LP3981IMM-3.3 Datasheet

  • LP3981IMM-3.3

  • VOLT REGULATOR|FIXED|+3.3V|CMOS|TSSOP|8PIN|PLASTIC

  • 11頁

  • ETC

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LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator
May 2002
LP3981
Micropower, 300mA Ultra Low-Dropout CMOS Voltage
Regulator
General Description
The LP3981鈥檚 performance is optimized for battery powered
systems to deliver ultra low noise, extremely low dropout
voltage and low quiescent current. Regulator ground current
increases only slightly in dropout, further prolonging the
battery life.
Power supply rejection is better than 60 dB at low frequen-
cies. This high power supply rejection is maintained down to
lower input voltage levels common to battery operated cir-
cuits.
The device is ideal for mobile phone and similar battery
powered wireless applications. It provides up to 300 mA,
from a 2.5V to 6V input, consuming less than 1碌A(chǔ) in disable
mode and has fast turn-on time less than 200碌s.
The LP3981 is available in MSOP-8 package. For LP3981 in
LLP-6 package, contact NSC sales offices. Performance is
specified for 鈭?0藲C to +125藲C temperature range. The de-
vice available in the following output voltages; 2.5V, 2.7V,
2.8V, 2.83V, 3.0V, 3.03V and 3.3V as standard. Other output
options can be made available, please contact your local
NSC sales office.
n
n
n
n
n
n
n
60dB PSRR at 1kHz
鈮?碌A(chǔ)
quiescent current when shut down
Fast Turn-On time: 120 碌s (typ.)
132mV typ dropout with 300mA load
35碌Vrms output noise over 10Hz to 100kHz
鈭?0 to +125藲C junction temperature range for operation
2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V outputs
standard
Features
n
Small, space saving MSOP-8
n
Low Thermal Resistance in LLP-6 package gives
excellent power capability
n
Logic controlled enable
n
Stable with ceramic and high quality tantalum capacitors
n
Fast turn-on
n
Thermal shutdown and short-circuit current limit
Applications
n
n
n
n
n
CDMA cellular handsets
Wideband CDMA cellular handsets
GSM cellular handsets
Portable information appliances
Tiny 3.3V
鹵
5% to 2.5V, 300mA converter
Key Specifications
n
2.5 to 6.0V input range
n
300mA guaranteed output
Typical Application Circuit
20020302
Note: Pin Numbers in parenthesis indicate LLP-6 package.
漏 2002 National Semiconductor Corporation
DS200203
www.national.com

LP3981IMM-3.3 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 6 V

  • 3.3 V

  • 0.005 V at 1 mA, 0.133 V at 200 mA, 0.2 V at 300 mA

  • 0.3 A

  • 1

  • Fixed

  • + 125 C

  • SMD/SMT

  • MSOP

  • 476 mW

  • - 40 C

  • Reel

  • 1000

  • +/- 2 %

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