SE5218

SE5218 SEAWARD | Alldatasheet

Document overview

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Technical content

Features

¾ Typical 175mV Dropout Voltage at 150mA. ¾ Fast Enable Turn-On Time of 20 μs (Typ.) ¾ Excellent Line and Load Regulation. ¾ High Accuracy Output Voltage of 2%. ¾ Ultra-Low Ground Current at 65 μA (Typ.) ¾ Disable Current Less than 0.3 μA (Typ.) ¾ Thermal Protection. ¾ Standard SOT-23-5L Packages.

Applications

¾ USB removable devices ¾ MPEG4 devices ¾ Wireless LAN’s ¾ Hand-Held Instrumentation. ¾ Portable DVD players ¾ Digital camera Application Diagram

Preliminary and all contents are subject to change without prior notice. 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Absolute Maximum Rating (1) Parameter Symbol Value Units Input Voltage V IN 6 V Enable Voltage V EN -0.3 to V IN V Power Dissipation P D 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 T J +150 °C Storage Temperature T S -40 to +150 °C Operating Rating (2) Parameter Symbol Value Units Supply Input Voltage V IN +2.8V to +5.5 V Junction Temperature T J 0 to +125 °C Ordering/Marking Information Package Ordering Information Marking Information 3.3V SE5218ALG-LF 21 8Alz 2.8V SE5218BLG-LF 21 8BLz 2.5V SE5218CLG-LF 21 8CLz 1.8V SE5218DLG-LF 21 8DLz 1.5V SE5218ELG-LF 21 8ELz 3.0V SE5218FLG-LF 21 8FLz 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.

Preliminary and all contents are subject to change without prior notice. 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218

Electrical Characteristics

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

Preliminary and all contents are subject to change without prior notice. 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 dissipati on will result in excessive die temperature, and the regulator will go into thermal shutdown. S ee “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

Preliminary and all contents are subject to change without prior notice. 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 VI N (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 IO U T (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 v s IO U T (VIN = 5V, IO UT = 10mA to 500mA) 100 120 140 160 0 100 200 300 400 500 IOUT (mA ) IQ (uA ) PSRR (VOUT = 3.3) (V IN = 5 V , V P P = 1 V ) 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. 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 limit 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 then limited to P D(MAX) = [T J – T A]/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 0.6W. 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. The inexpensive Electrolytic capacitor is preferred. The value can be increased without upper limit. Output Capacitor An output capacitor is re quired for stability. It must be placed no more than 1 cm away from the V OUT pin, and connected directly between V OUT and GND pins. The inexpensive Electrolytic capacitor is recommended. The minimum value is 1μF but may be increased without limit.

Preliminary and all contents are subject to change without prior notice. 500mA CMOS LDO Voltage Regulator (Preliminary) SE5218 Outline Drawing SOT-23-5L 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 B K A F D E C H J M I NM A XM I NM A X 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