Part Number(s)
(NSID)Top View
Type
Pins
MSL Rating
Peak Reflow
RoHS
StatusCAD Symbols
Models
Package
Marking
Format
LP3981ILD-2.5/NOPB
LP3981ILD-2.5
LLP
6
3
1260
235Detail
Download
N/A
ZXYTT
LO1UB
LP3981ILD-2.8/NOPB
LLP
6
3
260
Detail
Download
N/A
ZXYTT
L01ZB
LP3981ILD-3.0/NOPB
LP3981ILD-3.0
LLP
6
3
1260
235Detail
Download
N/A
ZXYTT
L017B
LP3981ILD-3.3/NOPB
LP3981ILD-3.3
LLP
6
3
1260
235Detail
Download
N/A
ZXYTT
LO1XB
LP3981ILDX-2.5/NOPB
LP3981ILDX-2.5
LLP
6
3
1260
235Detail
Download
N/A
ZXYTT
LO1UB
LP3981ILDX-2.7/NOPB
LP3981ILDX-2.7
LLP
6
3
1260
235Detail
Download
N/A
ZXYTT
LO1VB
LP3981ILDX-2.8/NOPB
LP3981ILDX-2.8
LLP
6
3
1260
235Detail
Download
N/A
ZXYTT
L01ZB
LP3981ILDX-2.83/NOPB
LLP
6
3
260
Detail
Download
N/A
ZXYTT
LO1SB
LP3981ILDX-3.03/NOPB
LLP
6
3
260
Detail
Download
N/A
ZXYTT
LO1YB
LP3981IMM-2.5/NOPB
LP3981IMM-2.5
MINI SOIC
8
1
1260
260Detail
Download
N/A
ZXTT
LFKB
LP3981IMM-2.7/NOPB
LP3981IMM-2.7MINI SOIC
8
1
1260
260Detail
Download
N/A
ZXTT
LFLB
LP3981IMM-2.8/NOPB
LP3981IMM-2.8MINI SOIC
8
1
1260
260Detail
Download
N/A
ZXTT
LFTB
LP3981IMM-3.0/NOPB
LP3981IMM-3.0MINI SOIC
8
1
1260
260Detail
Download
N/A
ZXTT
LF3B
LP3981IMM-3.03/NOPB
LP3981IMM-3.03MINI SOIC
8
1
1260
260Detail
Download
N/A
ZXTT
LFPB
LP3981IMM-3.3/NOPB
LP3981IMM-3.3MINI SOIC
8
1
1260
260Detail
Download
N/A
ZXTT
LFNB
LP3981IMMX-2.5/NOPB
LP3981IMMX-2.5MINI SOIC
8
1
1260
260Detail
Download
N/A
ZXTT
LFKB
LP3981IMMX-3.3/NOPB
LP3981IMMX-3.3MINI SOIC
8
1
1260
260Detail
Download
N/A
ZXTT
LFNB
Description
The LP3981's 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 frequencies. This high power supply rejection is maintained down to lower input voltage levels common to battery operated circuits.
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 1µA in disable mode.
The LP3981 is available in MSOP-8 package. For LP3981 in LLP-6 package, contact NSC sales offices. Performance is specified for -40°C to +125°C temperature range. The device 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.
| • | 2.5 to 6.0V input range |
| • | 300mA guaranteed output |
| • | 60dB PSRR at 1kHz |
| • | <=1µA quiescent current when shut down |
| • | Fast Turn-On time: 120 µs (typ.) with CBYPASS = 0.01uF |
| • | 132mV typ dropout with 300mA load |
| • | 35µVrms output noise over 10Hz to 100kHz |
| • | -40 to +125°C junction temperature range for operation |
| • | 2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V outputs standard |
| • | CDMA cellular handsets |
| • | Wideband CDMA cellular handsets |
| • | GSM cellular handsets |
| • | Portable information appliances |
| • | Tiny 3.3V ± 5% to 2.5V, 300mA converter |
| • | Small, space saving MSOP-8 |
| • | Low Thermal Resistance in LLP-6 package gives excellent power capability |
| • | Logic controlled enable |
| • | Stable with ceramic and high quality tantalum capacitors |
| • | Fast turn-on |
| • | Thermal shutdown and short-circuit current limit |
Diagrams
Typical Application
|
Block Diagram
|
Typical Performance 
|
source：ShenZhen henlito electronic co.,ltd.
web:www.henlito.com
