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Overview

The WL2837D series are high accuracy, low noise, high speed, high PSRR, low dropout CMOS Linear regulators 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 WL2837D 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 WL2837D regulators are available in standard DFN1x1-4L Package. Standard products are Pb-free and Halogen-free.

Applications
- MP3/MP4 Players
- Cellphones, radiophone, digital cameras
- Bluetooth, wireless handsets
- Other portable electronic devices

Features

Input Voltage Range:
1.4V~5.5V

Output Voltage Range:
0.9V~3.3V

Output current:
500 mA

Quiescent current:
50 μA Typ.

Shut-down current:
<1 μA

Dropout voltage:
526 mV @VOUT=1.1V, IOUT=0.5A

PSRR:
78 dB @ 1 kHz, VOUT=1.05V

Low Output Voltage Noise:
20 μVRMS Typ

Output Voltage Tolerance:
±1% @ VOUT>2V

Recommend capacitor:
1 μF

Thermal-Overload and Short-Circuit Protection

Order Information
Ordering No. Vout(V) Package
WL2837D105-4/TR 1.05 DFN1x1-4L
WL2837D11-4/TR 1.1 DFN1x1-4L
WL2837D115-4/TR 1.15 DFN1x1-4L
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