Low noise, High PSRR, High speed, CMOS
The WL2821 series is a high accuracy, low noise, high
speed, low dropout CMOS Linear regulator with high
ripple rejection. The devices offer a new level of cost
effective performance in cellular phones, laptop and
notebook computers, and other portable devices.
The WL2821 has the fold-back maximum output
current which depends on the output voltage. So the
current limit functions both as a short circuit protection
and as an output current limiter.
The WL2821 regulators are available in DFN1x1-4L
Package. Standard products are Pb-free and
Output current : 300mA Typ.
: 70dB @ 217Hz
Dropout voltage : 250mV @ IOUT=300mA
Quiescent current : 50μA Typ.
Shut-down current : < 1μA
Recommend capacitor : 1uF
Cellphones, radiophone, digital cameras
Bluetooth, wireless handsets
Others portable electronics device
Pin Configuration (Top View)
B: Device Code
* : Voltage Code
Y : Year Code
W: Week Code
For detail marking information, please see page 9.
For detail order information, please see page 9.
Will Semiconductor Ltd.
1 Jun, 2016 – Rev 0.9