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Technical content

Features

 Typical 200mV 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 20μA (Typ.)  Disable Current Less than 0.1μA (Typ.)  Over Current and thermal Protection.  No Reverse Current.  Standard SOT-23-5L and TSOP-5 Package. Pin Configuration 3 4 SOT-23-5L / TSOP-5 (Top View) VIN VOUT BYPASS GND ENABLE Application  USB removable devices  MPEG4 devices  Wireless LAN’s  Hand-Held Instrumentation.  Portable DVD players  Digital camera Block Diagram

Ordering Information

SE5509 _ _ _ Pin (1=>5): G: V IN/GND/EN/BYPASS/VOUT Package: L: SOT-23-5L / TSOP-5 Output Voltage: A: V OUT = 3.3V B: V OUT = 2.8V C: V OUT = 2.5V D: V OUT = 1.8V E: V OUT = 1.5V F: V OUT = 3.0V

Preliminary and all contents are subject to change without prior notice Low Power Low Noise LDO CMOS Voltage Regulator SE5509 Absolute Maximum Rating (1) Parameter Symbol Value Units Input Voltage VIN 6 V Enable Voltage VEN -0.3 to VIN V Output Voltage VOUT -0.3 to 4.6 V Power Dissipation PD Internally Limited (3) Output Short Circuit Duration Infinite Thermal Resistance, Junction-to-Ambient ΘJA 230 °C/W Lead Temperature (Soldering, 5 sec.) 260 °C Junction Temperature TJ 0 to +150 °C Storage Temperature TS -40 to +150 °C Operating Rating (2) Parameter Symbol Value Units Supply Input Voltage Range VIN 5.5 V Junction Temperature Range TJ 0 to +125 °C

Electrical Characteristics

VIN = 5V; VEN=VIN; CIN = 2.2μF; COUT = 2.2μF; IOUT = 10mA; TJ = 25°C; unless otherwise noted Symbol Parameter Conditions Min Typ Max Unit VOUT Output Voltage Accuracy SE5509 – 1.5 (VIN=1.8V) SE5509 – 1.8 (VIN=3.3V) SE5509 – 2.5 SE5509 – 2.8 SE5509 – 3.0 SE5509 – 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 VIN = (VOUT + 0.8)V to 5.5V -- 0.2 -- %/V ΔVOUT Load Regulation (5) VIN = (VOUT + 0.8)V or 2.5V IOUT = 10mA to 300mA -- 2.0 -- % Ordering/Marking Information Package Ordering Information Marking Information 3 4 SOT-23-5L / TSOP-5 (Top View) VIN VOUT BYPASS GND ENABLE 3.3V SE5509ALG-LF 509Alz Starting with 9, a bar on top of 9 is for production year 2005, and underlined 9 is for year 2006 . The naming pattern continues with consecutive characters for later years. The last character is the week code. ( A-Z: 1-26, a-z: 27-52) A dot on top right corner is for lead-free process. LF: lead free. 2.8V SE5509BLG-LF 509BLz 2.5V SE5509CLG-LF 509CLz 1.8V SE5509DLG-LF 509DLz 1.5V SE5509ELG-LF 509ELz 3.0V SE5509FLG-LF 509FLz

Preliminary and all contents are subject to change without prior notice Low Power Low Noise LDO CMOS Voltage Regulator SE5509 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 0.1mA to 300mA. 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 100mV below its nominal value measured at 0.8V differential. Electrical Characteristics (Continued) VIN = 5V; CIN = 2.2μF; COUT = 2.2μF; IOUT = 10mA; TJ = 25°C; unless otherwise noted Symbol Parameter Conditions Min Typ Max Unit ΔVOUT/ΔT Output Voltage Temperature Coefficient Note 4 -- 0.1 -- mV/°C VIN – VOUT Dropout Voltage (6) (VOUT>3.0V) IOUT = 10mA -- 8 -- mV IOUT = 150mA -- 200 -- IOUT = 300mA -- 350 -- TPROTECTION Thermal Protection Thermal Protection Temperature -- 150 -- Protection Hysterisys -- 20 -- PSRR Ripple Rejection f =10kHz,IOUT=50mA,Cbypass=0.1µF -- 70 -- dB IQ Quiescent Current μA VEN = VIN -- 20 -- VTH(EN) Enable Input Threshold Voltage Voltage Raising, Output Turns On, Logic High 1.6 -- -- V Voltage Falling, Output Turns Off, Logic Low -- -- 0.4 ILIMIT Current Limit -- 500 -- mA

Preliminary and all contents are subject to change without prior notice Low Power Low Noise LDO CMOS Voltage Regulator SE5509 Line Regulation (IOUT=10mA) 3.15 3.20 3.25 3.30 3.35 3.40 3.60 4.10 4.60 5.10 VIN (V) VOUT (V) Load Regulation (VIN=4.3V) 3.15 3.20 3.25 3.30 3.35 3.40 0 100 200 300 400 IOUT (mA) VOUT (V) IQ VS. IOUT(VOUT=3.3V) 0 50 100 150 200 250 300 350 IOUT (mA) IQ (µA) IQ VS. VIN(VOUT=3.3V) 25.0 25.5 26.0 26.5 27.0 27.5 VIN (V) IQ (µA) 0.1 1 10 100 PSRR (dB) Frequency (kHz) PSRR (VIN=VOUT+1V+0.5Vp-pAC，IOUT=50mA，Cbypass=0.1µF) Input Transient Response (VOUT = 3.3V) (VIN=3.6V to 5.0V) Load Transient Response (VOUT = 3.3V) (IOUT=10mA to 300mA)

Preliminary and all contents are subject to change without prior notice Low Power Low Noise LDO CMOS Voltage Regulator SE5509 Application Hints Like any low dropout regulator, SE5509 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 SE5509 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 – TA]/ΘJA where T J is the junction temperature, TA is the ambient temperature, and ΘJA is around 230°C/W for SE5509. SE5509 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) = 300mA, then [VIN – VOUT] cannot exceed 2V. 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 capacitor is required for stability. It must be placed no more than 1 cm away from the V OUT pin, and connected directly between VOUT and GND pins. Electrolytical capacitor is recommended. The minimum value is 1μF but may be increase without limit. Ceramic can be used. But the value should not be more than 2.2μF. Application Diagram

Preliminary and all contents are subject to change without prior notice Low Power Low Noise LDO CMOS Voltage Regulator SE5509 OUTLINE DRAWING SOT-23-5L OUTLINE DRAWING TSOP-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 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 0.040 0.90 1.00 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

Preliminary and all contents are subject to change without prior notice Low Power Low Noise LDO CMOS Voltage Regulator SE5509 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 - 9/26/2012