NumEn NU503B
20mA Constant Current Regulator
FEATURES
● The most easy used linear constant current LED driver● Do not need to take VDD power
● 20mA constant current regulator
● 1.6V ~ 15V wide working voltage range
● 1uS current rising time, support power supply PWM dimming function
● Less than 1%/V line/load regulation
● 125°C ~160°C junction temperature current ramp down thermal protect
● -40℃ ~ 85℃ operating temperature
● Pb free
APPLICATIONS
● LED strip● General LED lighting
● LCD back lighting
● LED torch / flashlight Package Type
● SOT 23-3 (2.9mm * 1.3mm) VN 503B 2014/05/22 NU503B NC VP Block Diagram and Ideal IV characteristic Vrefence VP IPN IV curve Ip Is VN Vt Vp
MAXIMUM RATINGS
(T = 25°C) Characteristic Supply voltage Reverse voltage Power Dissipation (Ta=25°C) Thermal Resistance (On PCB, Ta=25°C) Operating temperature Storage temperature Symbol VPN VR PD SOT 23 RTH(j-a) SOT 23 TOPR TSTG Rating -0.2 ~ 16 0.5 0.25 300 -40~+85 -55~+150 Unit V V W °C /W °C °C -1- Please visit for more patent information. 3F., No. 96, Sec.