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Technical content

Features

 Typical 175mV Dropout Voltage at 150mA.  Fast Enable Turn-On Time of 20μs (Typ.)  Excellent Line and Load Regulation.  High Accuracy Output Voltage of 2%.  Ultra-Low Ground Current at 65μA (Typ.)  Disable Current Less than 0.3μA (Typ.)  Thermal Protection.  Standard SOT-23-5L Packages.

Applications

 USB removable devices  MPEG4 devices  Wireless LAN’s  Hand-Held Instrumentation.  Portable DVD players  Digital camera Application Diagram

Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 2 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Absolute Maximum Rating (1) Parameter Symbol Value Units Input Voltage VIN 6 V Enable Voltage VEN -0.3 to VIN V Power Dissipation PD Internally Limited (3) Output Short Circuit Duration Infinite Thermal Resistance, Junction-to-Ambient ΘJA 230 (SOT-23-5L) °C/W Lead Temperature (Soldering, 5 sec.) 260 °C Junction Temperature TJ +150 °C Storage Temperature TS -40 to +150 °C Operating Rating (2) Parameter Symbol Value Units Supply Input Voltage VIN +2.8V to +5.5 V Junction Temperature TJ 0 to +125 °C Ordering/Marking Information Package Ordering Information Marking Information 3.3V SE5218ALG-LF 218Alz Starting with 5, a bar on top of 5 is for production year 2001, and underlined 5 is for year 2002. The next character is marked on top for 2003, and underlined for 2004. The naming pattern continues with consecutive characters for later years. The last character is the week code. A dot on top right corner is for lead-free process. 2.8V SE5218BLG-LF 218BLz 2.5V SE5218CLG-LF 218CLz 1.8V SE5218DLG-LF 218DLz 1.5V SE5218ELG-LF 218ELz 3.0V SE5218FLG-LF 218FLz 1.2V SE5218GLG-LF 218GLz

Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 3 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218

Electrical Characteristics

VIN =5V; VEN=VIN; CIN = 2.2μF; COUT = 2.2μF; IOUT = 10mA; TJ = 25°C; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit VOUT Output Voltage Accuracy SE5218 – 1.2(VIN=3.3V) SE5218 – 1.5(VIN=3.3V) SE5218 – 1.8(VIN=3.3V) SE5218 – 2.5 SE5218 – 2.8 SE5218 – 3.0 SE5218 – 3.3 1.176 1.470 1.764 2.450 2.744 2.940 3.234 1.2 1.5 1.8 2.5 2.8 3.0 3.3 1.224 1.530 1.836 2.550 2.856 3.060 3.366 V ΔVOUT Line Regulation VIN = (VOUT+1)V to 5.5V -- 1.0 -- %/V ΔVOUT Load Regulation (5) VIN = (VOUT+0.8)V or 2.5V IOUT = 10mA to 250mA -- 1.0 -- % IOUT = 10mA to 500mA -- 1.5 -- ΔVOUT/ΔT Output Voltage Temperature Coefficient Note 4 -- 0.025 -- mV/°C VIN – VOUT Dropout Voltage (6) IOUT = 10mA 15 mV IOUT = 150mA 175 IOUT = 250mA 320 IOUT = 400mA 600 TPROTECTION Thermal Protection Thermal Protection Temperature -- 150 -- Protection Hysterisys -- 20 -- PSRR Ripple Rejection f = 120 Hz -- 59 -- dB IQ Quiescent Current VEN = 0.4V -- 0.3 -- μA VEN = VIN -- 65 -- VTH(EN) Enable Input Threshold Voltage Voltage Increasing, Output Turns On, Logic High 1.6 -- -- V Voltage Decreasing, Output Turns Off, Logic Low -- -- 0.4 ILIMIT Current Limit -- 800 -- mA

Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 4 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function outside its operating rating. Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details Note 4: Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range. Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 10mA to 500mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Block Diagram

Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 5 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Line Regulation (VOUT = 3.3V) (VIN = 4.3V to 6V, IOUT = 10mA) 3.0000 3.1000 3.2000 3.3000 3.4000 3.5000 3.6000 4.2 4.7 5.2 5.7 VIN (V) VOUT (V) Load Regulation (VOUT = 3.3V) (VIN = 5V, IOUT = 10mA to 500mA) 3.000 3.100 3.200 3.300 3.400 3.500 3.600 0 100 200 300 400 500 IOUT (mA) VOUT (V) Output Voltage vs Temperature (VIN = 5V, IOUT = 10mA) 3.270 3.280 3.290 3.300 3.310 3.320 3.330 0 20 40 60 80 100 120 Temperature (C) VOUT (V) IQ vs IOUT (VIN = 5V, IOUT = 10mA to 500mA) 100 120 140 160 0 100 200 300 400 500 IOUT (mA) IQ (uA) PSRR (VOUT = 3.3) (VIN = 5V, VPP = 1V) 100 1000 10000 Frequency (Hz) PSRR (dB) Transient Response (VOUT = 3.3V) (IOUT = 10mA to 40mA)

Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 6 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Application Hints Like any low dropout regulator, SE5218 requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure performance. Thermal Considerations It is important that the thermal limit of the package is not exceeded. The SE5218 has built -in thermal protection. When the thermal li mit is exceeded, the IC will enter protection, and V OUT will be pulled to ground. The power dissipation for a given application can be calculated as following: The power dissipation (P D) is PD = IOUT * [VIN – VOUT] The thermal limit of the package is t hen limited to PD(MAX) = [T J – TA]/ΘJA where T J is the junction temperature, TA is the ambient temperature, and Θ JA for SOT -23-5L is around 230°C/W for SE5218. SE5218 is designed to enter thermal protection at 150°C. For example, if T A is 25°C then the maximum P D is limited to about 0.6 W. In other words, if I OUT(MAX) = 400mA, then [V IN – VOUT] cannot exceed 1.5V. Input Capacitor An input capacitor of at least 1μF is required. Ceramic or Tantalum can be used. The value can be increase without upper limit. Output Capacitor An output c apacitor is required for stability. It must be placed no more than 1 cm away from the VOUT pin, and connected directly between V OUT and GND pins. The minimum value is 1μF but may be increase without limit.

Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com • Page 7 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Outline Drawing SOT-23-5L Customer Support Seaward Electronics Incorporated – China Rm 1605, Building 1, International Pioneering Park, #1 Shangdi Xinxi Rd Haidian District, Beijing 100085, China Tel: 86-10-8289-5700/01/05 Fax: 86-10-8289-5706 Seaward Electronics Corporation – Taiwan 2F, #181, Sec. 3, Minquan East Rd, Taipei, Taiwan R.O.C Tel: 886-2-2712-0307 Fax: 886-2-2712-0191 Seaward Electronics Incorporated – North America 1512 Centre Pointe Dr. Milpitas, CA95035, USA Tel: 1-408-821-6600 Last Updated - 4/19/2016 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