SE5508

SE5508 SEAWARD | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 7

Technical content

Features

¾ Excellent Noise Rejection at 62 dB. ¾ Typical Low Dropout Voltage of 200mV at 75mA. ¾ Fast Enable Turn-On Time of 20 μs (Typ.) ¾ Excellent Line and Load Regulation. ¾ High Accuracy Output Voltage of 2%. ¾ Typical Low Ground Current at 50 μA ¾ Typical Disable Current Less than 0.1 μA ¾ Thermal Protection. ¾ Standard SOT23-5L and SC70 (SOT353) Package. ¾ Available in Lead-Free Packages.

Applications

¾ Cellphones. ¾ Wireless LAN’s. ¾ Hand-Held Instrumentation. ¾ Portable Video Game Devices. ¾ Digital Cameras.

Ordering Information

SE5508 _ _ _ G: V IN/GND/EN/BYPASS/VOUT Package: L: SOT-23-5L P: SC70 (SOT353) 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. 150mA CMOS Low Noise LDO Voltage Regulator (Preliminary) SE5508 Absolute Maximum Rating (1) Parameter Symbol Value Units Input Voltage V IN 6 V Enable Voltage V EN -0.3 to V IN V Output Voltage V OUT -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 °C/W Lead Temperature (Soldering, 5 sec.) 260 °C Junction Temperature T J 0 to +150 °C Storage Temperature T S -40 to +150 °C Operating Rating (2) Parameter Symbol Value Units Supply Input Voltage V IN +2.0V to +5.5 V Junction Temperature T J 0 to +125 °C

Electrical Characteristics

VIN = 5V; CIN = 2.2μF; COUT = 2.21μF; IOUT = 10mA; TJ = 25°C; unless otherwise noted Symbol Parameter Conditions Min Typ Max Unit VOUT Output Voltage Accuracy SE5508 – 1.5 SE5508 – 1.8 SE5508 – 2.5 SE5508 – 2.8 SE5508 – 3.0 SE5508 – 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 V V V V ΔVOUT Line Regulation VIN = VOUT + 1V to 6V, IOUT = 10mA (VOUT = 3.3V) -- 1 -- %/V ΔVOUT Load Regulation (5) VIN = 5V; IOUT = 10mA to 150mA (VOUT = 3.3V) -- 1 -- % ΔVOUT/ΔT Output Voltage Temperature Coefficient Note 4 -- 0.033 -- mV/°C

Preliminary and all contents are subject to change without prior notice. 150mA CMOS Low Noise LDO Voltage Regulator (Preliminary) SE5508 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 IOUT = 10mA -- 20 -- IOUT = 75mA -- 200 -- VIN – VOUT Dropout Voltage (6) IOUT = 150mA -- 500 -- mV Thermal Protection Temperature -- 150 -- TPROTECTION Thermal Protection Protection Hysterisys -- 20 -- PSRR Ripple Rejection f = 120 Hz -- 62 -- dB VEN = 0V (VOUT = 1.5V) -- 0.1 -- IQ Quiescent Current VEN = VTH(EN); IOUT = 10mA (VOUT = 1.5V) -- 50 -- 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 300 -- -- mA 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 150mA. 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.

Preliminary and all contents are subject to change without prior notice. 150mA CMOS Low Noise LDO Voltage Regulator (Preliminary) SE5508 Line Regulation (VOUT = 3.3V) (VIN = 4.3V to 5V, 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 150mA) 3.0000 3.1000 3.2000 3.3000 3.4000 3.5000 3.6000 0 50 100 150 IO U T (mA ) VOUT (V) Output Voltage vs Temperature (VIN = 3.3V, IOUT = 10mA) 1.400 1.450 1.500 1.550 1.600 20 30 40 50 60 70 80 90 100 110 120 Temperature(C) Output Voltage(V) IQ vs IO U T (V O U T = 1.5V ) (VIN = 3.3V, IOUT = 10mA to 150mA) 100 0 20 40 60 80 100 120 140 160 IO U T (mA ) IQ (uA ) PSRR (VOUT = 3.3V) (V IN = 5 V , V P P = 1 V ) 30.0 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 100 1000 10000 100000 Frequency (Hz) PSRR ( dB) CBY = 10uF CBY = 22uF CBY = 0.1uF Transient Response (VOUT = 3.3V) (IOUT = 1mA to 40mA)

Preliminary and all contents are subject to change without prior notice. 150mA CMOS Low Noise LDO Voltage Regulator (Preliminary) SE5508 Block Diagram Application Hints Like any low dropout regulator, SE5508 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 SE5508 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 is around 230°C/W for SE5508. SE5508 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) = 150mA, then [VIN – VOUT] cannot exceed 3.6V. Input Capacitor An input capacitor of at least 1 μF 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. The minimum value is 1 μF but may be increase without limit. Application Diagram

Preliminary and all contents are subject to change without prior notice. 150mA CMOS Low Noise LDO Voltage Regulator (Preliminary) SE5508 OUTLINE DRAWING SOT-23-5L OUTLINE DRAWING SC70 (SOT353) 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

Preliminary and all contents are subject to change without prior notice. 150mA CMOS Low Noise LDO Voltage Regulator (Preliminary) SE5508 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