EC49509 E-CMOS | Alldatasheet

Document overview

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Technical content

Features

z Typical 200mV Dropout Voltage at 150mA z Fast Enable Turn-On Time of 20 μs (Typ.) z Excellent Line and Load Regulation z High Accuracy Output Voltage of 2% z Ultra-Low Ground Current at 20 μA (Typ.) z Disable Current Less than 0.1 μA (Typ.) z Over Current and thermal Protection z No Reverse Current z Standard SOT-23-5L Package

Applications

z Wireless LAN’s z Hand-Held Instrumentation z Portable DVD players z Digital camera Block Diagram

LDO CMOS Voltage Regulator E-CMOS Corp. (www.ecmos.com.tw) Page 2 of 8 2007/11/05 Package Vout Voltage Part Number Marking Marking Information 3.3V EC49509ALG-F 509 ALz 2.8V EC49509BLG-F 509 BLz 2.5V EC49509CLG-F 509 CLz 1.8V EC49509DLG-F 509 DLz 1.5V EC49509ELG-F 509 ELz SOT-23-5L 3.0V EC49509FLG-F 509 FLz DFN2X2 3.3V EC49509AF-F 509A 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 middle character (A-F) is the output voltage of production. L means the package is SOT-23-5L. 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. Pin Configuration Ordering/Marking Information 509ALz EC49509 X X X - F 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 Package: L = SOT-23-5L Pin (1-5) : G = V IN/GND/EN/BYPASS/V OUT F: Lead-Free F = DFN 2X2 6 5 4 1 2 3 VIN NC VOUT ENABLE GND BYPASS 509A DFN2x2 (Top View)

LDO CMOS Voltage Regulator E-CMOS Corp. (www.ecmos.com.tw) Page 3 of 8 2007/11/05 Absolute Maximum Rating (Note1) 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 4.6 V Power Dissipation P D Internally Limited (Note3) W 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 Recommended Operating Conditions (Note 2) Parameter Symbol Value Units Supply Input Voltage Range V IN 5.5 V Junction Temperature Range T J 0 to +125 °C

LDO CMOS Voltage Regulator E-CMOS Corp. (www.ecmos.com.tw) Page 4 of 8 2007/11/05

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 EC49509 – 1.5 (VIN=1.8V) EC49509 – 1.8 (VIN=3.3V) EC49509 – 2.5 EC49509 – 2.8 EC49509 – 3.0 EC49509 – 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 (Note 5) VIN = (VOUT + 0.8) V or 2.5V IOUT = 10mA to 300mA — 2.0 — % ΔVOUT/ΔT Output Voltage Temperature Coefficient Note 4 — 0.1 — mV/° C IOUT = 10mA — 8 — IOUT = 150mA — 200 — VIN – VOUT Dropout Voltage (Note 6) (VOUT>3.0V) IOUT = 300mA — 350 — mV Thermal Protection Temperature — 150 — TPROTECTION Thermal Protection Protection Hysterisys — 20 — PSRR Ripple Rejection f =10kHz,I OUT=50mA,Cbypass=0.1uF — 70 — dB VEN = 0.4V — 0.1 — IQ Quiescent Current VEN = VIN — 20 — μA Voltage Raising, Output Turns On, Logic High 1.6 — — VTH (EN) Enable Input Threshold Voltage Voltage Falling, Output Turns Off, Logic Low — — 0.4 V ILIMIT Current Limit — 600 — 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 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.

LDO CMOS Voltage Regulator E-CMOS Corp. (www.ecmos.com.tw) Page 7 of 8 2007/11/05 Application Hints Like any low dropout regulator, EC49509 requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure performance. 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. The minimum value is 1μF but may be increase without limit. Thermal Considerations It is important that the thermal limit of the package is not exceeded. The EC49509 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) = [TJ – TA]/ΘJA where TJ is the junction temperature, TA is the ambient temperature, and ΘJA is around 230°C/W for EC49509. EC49509 is designed to enter thermal protection at 150°C. For example, if T A is 25°C then the maximum PD is limited to about 0.6W. In other words, if I OUT (MAX) = 300mA, then [VIN – VOUT] cannot exceed 2V. Application Diagram

LDO CMOS Voltage Regulator E-CMOS Corp. (www.ecmos.com.tw) Page 8 of 8 2007/11/05 OUTLINE DRAWING SOT-23-5L DIMENSIONS DIMN INCHES MM MIN MAX MIN MAX A 0.106 0.122 2.70 3.10 B 0.055 0.071 1.40 1.80 C 0.030 0.045 0.75 1.15 D 0.011 0.022 0.30 0.55 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 OUTLINE DRAWING DFN2X2 B K A F D E C H J