500mA CMOS LDO Voltage Regulator (Preliminary) Features Description The SE5218 series of fixed output low dropout linear regulators are designed for portable battery powered applications, which require low noise environment, fast enable response time, and low dropout voltage. Each device contains a bandgap voltage reference, an error amplifier, a PMOS power transistor, and resistors for setting output voltage, and current limit and temperature limit protection circuits. The SE5218 has been designed to be used with ¾ Typical 175mV Dropout Voltage at 150mA. ¾ Fast Enable Turn-On Time of 20μs (Typ.) ¾ Excellent Line and Load Regulation. ¾ High Accuracy Output Voltage of 2%. ¾ Ultra-Low Ground Current at 65μA (Typ.) ¾ Disable Current Less than 0.3μA (Typ.) ¾ Thermal Protection. ¾ Standard SOT-23-5L Packages. Applications low cost capacitors and requires a minimum output ¾ USB removable devices capacitor of 1.0μF. ¾ MPEG4 devices ¾ Wireless LAN’s ¾ Hand-Held Instrumentation. ¾ Portable DVD players ¾ Digital camera Standard voltage versions are 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3V. Pin Configuration Revision SE5218 Application Diagram 12/5/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 1 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Ordering/Marking Information Package Ordering Information 3.3V SE5218ALG-LF Marking Information Starting with 5, a bar on top of 5 is 218Alz for 2.8V SE5218BLG-LF production year 2001, and underlined 5 is for year 2002. The 218BLz next character is marked on top for 2003, and underlined for 2004. The 2.5V SE5218CLG-LF 218CLz 1.8V SE5218DLG-LF 218DLz consecutive characters for later years. 1.5V SE5218ELG-LF 218ELz (A-Z: 3.0V SE5218FLG-LF 218FLz lead-free process. naming pattern continues with The last character is the week code. 1-26, a-z: 27-52) A dot on top right corner is for 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 Thermal Resistance, Junction-to-Ambient Infinite ΘJA 230 (SOT-23-5L) °C/W 260 °C Lead Temperature (Soldering, 5 sec.) Junction Temperature TJ +150 °C Storage Temperature TS -40 to +150 °C Operating Rating (2) Revision Parameter Symbol Value Units Supply Input Voltage VIN +2.8V to +5.5 V Junction Temperature TJ 0 to +125 °C 12/5/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 2 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Electrical Characteristics VIN =5V; VEN=VIN; CIN = 2.2μF; COUT = 2.2μF（Electrolytic Symbol Parameter VOUT Output Voltage Accuracy ΔVOUT Line Regulation ΔVOUT Load Regulation (5) ΔVOUT/ΔT Output Voltage Temperature Coefficient VIN – VOUT Dropout Voltage (6) TPROTECTION PSRR IQ VTH(EN) ILIMIT Revision Thermal Protection Ripple Rejection Quiescent Current Enable Input Threshold Voltage Current Limit capacitor）; IOUT = 10mA; TJ = 25°C; unless otherwise specified. Conditions SE5218 – 1.5(VIN=3.3V) SE5218 – 1.8(VIN=3.3V) SE5218 – 2.5 SE5218 – 2.8 SE5218 – 3.0 SE5218 – 3.3 Min 1.470 1.764 2.450 2.744 2.940 3.234 Typ 1.5 1.8 2.5 2.8 3.0 3.3 Max 1.530 1.836 2.550 2.856 3.060 3.366 Unit VIN = (VOUT+1)V to 5.5V -- 1.0 -- %/V -- 1.0 -- VIN = (VOUT+0.8)V or 2.5V IOUT = 10mA to 250mA IOUT = 10mA to 500mA Note 4 V % -- 1.5 -- -- 0.025 -- IOUT = 10mA IOUT = 150mA IOUT = 250mA 15 175 320 IOUT = 400mA 600 mV/°C mV Thermal Protection Temperature -- 150 -- Protection Hysterisys -- 20 -- f = 120 Hz -- 59 -- dB VEN = 0.4V VEN = VIN Voltage Increasing, Output Turns On, Logic High Voltage Decreasing, Output Turns Off, Logic Low --- 0.3 65 --- μA 1.6 -- -- °C V -- -- 0.4 -- 800 -- 12/5/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 3 mA 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. Note 7: The Cin or Cout should be chosen carefully. Please refer to the Application Hints Block Diagram Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 4 SE5218 Line R egulation (VOUT = 3.3V) Load R egulation (VOUT = 3.3V) (VIN = 4.3V to 6V, IOUT = 10mA) (VIN = 5V, IOUT = 10mA to 500mA) 3.6000 3.600 3.5000 3.500 3.4000 3.400 VOUT (V) VOUT (V) 500mA CMOS LDO Voltage Regulator (Preliminary) 3.3000 3.300 3.2000 3.200 3.1000 3.100 3.000 3.0000 4.2 4.7 5.2 0 5.7 100 200 300 400 500 400 500 IOUT (mA) VIN (V) Output Voltage vs Temperature IQ vs IOUT (VIN = 5V, IOUT = 10mA) (VIN = 5V, IO UT = 10mA to 500mA) 3.330 160 140 3.320 120 100 IQ (uA ) VOUT (V) 3.310 3.300 80 60 3.290 40 3.280 20 3.270 0 20 40 60 80 100 120 0 0 100 200 300 IOUT (mA ) Temperature (C ) P S R R (VOUT = 3.3) Transient Response (VOUT = 3.3V) (VIN = 5V, VP P = 1V) (IOUT = 10mA to 40mA) 70 60 P S R R (dB) 50 40 30 20 10 0 100 1000 10000 Frequency (Hz) Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 5 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Application Hints Thermal Considerations Like any low dropout regulator, SE5218 requires It is important that the thermal limit of the package external capacitors to ensure stability. is not exceeded. The SE5218 has built-in external capacitors must be carefully selected to thermal protection. When the thermal limit is ensure performance. exceeded, the IC will enter protection, and VOUT The will be pulled to ground. The power dissipation Input Capacitor An input capacitor of at least 1μF is required. The inexpensive Electrolytic capacitor is preferred. The value can be increased without upper limit. following: The power dissipation (PD) is PD = IOUT * [VIN – VOUT] Output Capacitor An output capacitor is required for stability. for a given application can be calculated as It must be placed no more than 1 cm away from the The thermal limit of the package is then limited to VOUT pin, and connected directly between VOUT PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction and GND pins. The inexpensive Electrolytic temperature, TA is the ambient temperature, and capacitor is recommended. The minimum value is ΘJA for SOT-23-5L is around 230°C/W for 1μF but may be increased without limit. SE5218. SE5218 is designed to enter thermal protection at 150°C. For example, if TA is 25°C then the maximum PD is limited to about 0.6W. In other words, if IOUT(MAX) = 400mA, then [VIN – VOUT] cannot exceed 1.5V. Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 6 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Outline Drawing SOT-23-5L K B H A F E C N DIM D J A B C D E F H J K DIMENSIONS INCHES MM MIN MAX MIN MAX 0.110 0.059 0.036 0.014 0.0035 0.102 0.120 0.070 0.051 0.020 0.037 0.075 0.006 0.008 0.118 Customer Support Seaward Electronics Incorporated – China Section B, 2nd Floor, ShangDi Scientific Office Complex, #22 XinXi Road 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 - 12/5/2008 Revision 12/5/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2005. • www.seawardinc.com.cn • Page 7 2.80 1.50 0.90 0.35 0.090 2.60 3.05 1.75 1.30 0.50 0.95 1.90 0.15 0.20 3.00