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Technical content

Features

 Output current up to 500mA  Low dropout voltage 600mV(Typ) at 500mA  Low ground current 65uA  short-current protection  Over-temperature protection  4 V to 18 V Supply Range  Low Shutdown Current  Requires Only 1u F Output Capacitance for Stability  No external components are required  100% Lead (Pb)-Free

Applications

 PCMCIA Card  Cellular Phones  Camcorders and Cameras  Networking Systems, DSL/Cable Modems  Cable Set-Top Box  MP3/CD Players  DSP Supply  Displays and Monitors

Rev1.0 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., • www.seawardinc.com .cn • Page 2 9/4/2012 SE3335 (Preliminary) 500mA Low Noise CMOS LDO Regulator Pin Configuration Pin name Description Vout Regulated output voltage. Bypass to ground with Cout ≧1.0uF Adj Adjustable pin; reference voltage=1.25V GND Power Supply Ground FB Feedback pin EN Shutdown pin. When not in use, this pin should be connected to the input pin. Vin Power supply Input Voltage NC Not Connected Absolute Maximum Rating Parameter Symbol Maximum Units Input Voltage VIN 18 V Operating Junction Temperature Range TJ -40 to +125 °C Thermal Resistance θJA 45(SOT23-5) 150(SOP8) °C/W Lead Temperature (Soldering) 10 seconds TLEAD 260 °C Storage Temperature TSTG -65 to +150 °C ESD (HBM) Susceptibility VESD 2 KV

Rev1.0 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., • www.seawardinc.com .cn • Page 3 9/4/2012 SE3335 (Preliminary) 500mA Low Noise CMOS LDO Regulator

Electrical Characteristics

VOUT(T)=7v,Vin=8v; TJ = 25°C; unless otherwise specified PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Input Supple Voltage Vin 4 18 V Reference Voltage Accuracy Vref Iload=10mA 1.225 1.25 1.275 V Linear Regulation △VOUT/Vout VIN = 8v to 18v 0.01 %/V Load Regulation △VOUT/VOUT IOUT = 10mA to 500 mA 0.002 %/mA Dropout Voltage VDIF1 IOUT = 50 mA 90 mV VDIF2 IOUT = 300 mA 300 VDIF3 IOUT = 500 mA 600 Ground Current IGND1 IOUT = 100uA 65 µA IGND2 IOUT = 500mA 160 µA Shutdown Current IGND VEN<0.6V,VIN=5.4V 0.05 µA Peak Output Current Ipk 670 mA Short Circuit Current ILIMIT VOUT=0 325 mA PSRR Cnr=10nF Freq=100Hz I-load=50mA, Vout=2.5V Cout=10uF dB Cnr=10nF Freq=1KHz I-load=50mA, Vout=2.5V Cout=10uF Cnr=100nF, Freq=100Hz I-load=50mA, Vout=2.5V Cout=10uF Cnr=100nF Freq=1KHz I-load=50mA ,Vout=2.5V Cout=10uF Output Noise Vnoise Cnr = 0, Vout=2.5V, Freq = 10 Hz to 100 kHz, Cout = 10 uF ,Iload=0mA 255 uVrms Cnr = 0, Vout=2.5V, Freq = 10 Hz to 100 kHz, Cout = 10 uF,Iload=300mA 330 Cnr =100 nF, Vout=2.5V, Freq = 10 Hz to 100 kHz, Cout = 10 uF, Iload=0mA Cnr =100 nF, Vout=2.5V, Freq = 10 Hz to 100 kHz, Cout = 10 uF,Iload=300mA

Rev1.0 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., • www.seawardinc.com .cn • Page 4 9/4/2012 SE3335 (Preliminary) 500mA Low Noise CMOS LDO Regulator PARAMETER SYMBOL SIMULATION CONDITIONS MIN TYP MAX UNIT Over Temperature Protection TJ Over Temperature Protection threshold 145 ℃ Over Temperature Protection Hysteresis 15 ℃ Reverse Current IRC VIN=0,VOUT=5V,VEN=0 8 µA IRC VIN Open, VOUT=5V,VEN=0 8 µA Input Low Voltage VIL Regulator OFF 0.6 V Input High Voltage VIH Regulator ON 2 V Outline Drawing SOT23-5 B K A F D E C H J MIN MAX MIN MAX A 0.110 0.120 2.80 3.05 B 0.059 0.070 1.50 1.75 C 0.036 0.051 0.90 1.30 D 0.014 0.020 0.35 0.50 E - 0.037 - 0.95 F - 0.075 - 1.90 H - 0.006 - 0.15 J 0.0035 0.008 0.090 0.20 K 0.102 0.118 2.60 3.00 DIMN INCHES MM DIMENSIONS PSOP8

Rev1.0 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., • www.seawardinc.com .cn • Page 5 9/4/2012 SE3335 (Preliminary) 500mA Low Noise CMOS LDO Regulator 联系方式： 北京思旺电子技术有限公司–中国总部 地址：中国北京市海淀区信息路 22 号上地科技综合楼 B 座二层 邮编：100085 电话:010-82895700/1/5 传真:010-82895706 Seaward Electronics Corporation – 台湾办事处 2F, #181, Sec. 3, Minquan East Rd, Taipei, Taiwan R.O.C 电话: 886-2-2712-0307 传真: 886-2-2712-0191 Seaward Electronics Incorporated – 北美办事处 1512 Centre Pointe Dr. Milpitas, CA95035, USA 电话: 1-408-821-6600