EC49509 300mA Low Power Low Noise LDO CMOS Voltage Regulator Description Features The EC49509 series of fixed output low dropout linear regulators are designed for portable battery powered applications, which require low power consumption, low noise environment, 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. z z z z z z z z z The EC49509 has been designed to be used with low cost capacitors and requires a minimum output capacitor of 1.0μF. The output voltages range from 1.3V to 4.4V in 100mV increments. Standard voltage versions are 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3V. 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 Package Applications z USB removable devices z MPEG4 devices z Wireless LAN’s z Hand-Held Instrumentation z Portable DVD players z Digital camera Block Diagram E-CMOS Corp. (www.ecmos.com.tw) Page 1 of 8 2007/11/05 EC49509 300mA Low Power Low Noise LDO CMOS Voltage Regulator Pin Configuration GND BYPASS 509ALz ENABLE DFN2x2 (Top View) 6 5 4 1 2 3 VIN NC VOUT 509A Ordering/Marking Information EC49509 X X X - F F: Lead-Free Pin (1-5) : G = V IN /GND/EN/BYPASS/V OUT Package: L = SOT-23-5L F = DFN 2X2 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 Vout Voltage 3.3V SOT-23-5L Part Number EC49509ALG-F Marking 509ALz 2.8V EC49509BLG-F 509BLz 2.5V EC49509CLG-F 509CLz 1.8V EC49509DLG-F 509DLz 1.5V EC49509ELG-F 509ELz 3.0V EC49509FLG-F 509FLz Marking Information 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). DFN2X2 3.3V E-CMOS Corp. (www.ecmos.com.tw) EC49509AF-F 509A Page 2 of 8 A dot on top right corner is for lead-free process. 2007/11/05 EC49509 300mA Low Power Low Noise LDO CMOS Voltage Regulator Absolute Maximum Rating (Note1) 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 (Note3) W Power Dissipation PD 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 Parameter Symbol Value Units Supply Input Voltage Range VIN 5.5 V Junction Temperature Range TJ 0 to +125 °C Internally Limited Recommended Operating Conditions (Note 2) E-CMOS Corp. (www.ecmos.com.tw) Page 3 of 8 2007/11/05 EC49509 300mA Low Power Low Noise LDO CMOS Voltage Regulator Electrical Characteristics VIN = 5V; VEN=VIN; CIN = 2.2μF; COUT = 2.2μF; IOUT = 10mA; TJ = 25°C; unless otherwise noted Symbol VOUT ΔVOUT ΔVOUT Parameter Conditions Min Typ Max Unit Output Voltage EC49509 – 1.5 (VIN=1.8V) EC49509 – 1.8 (VIN=3.3V) EC49509 – 2.5 EC49509 – 2.8 EC49509 – 3.0 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 EC49509 – 3.3 1.470 1.764 2.450 2.744 2.940 3.234 Line Regulation VIN = (VOUT + 0.8) V to 5.5V — 0.2 — %/V Load Regulation VIN = (VOUT + 0.8) V or 2.5V IOUT = 10mA to 300mA — 2.0 — % Note 4 — 0.1 — Accuracy (Note 5) Output Voltage ΔVOUT/ΔT Temperature Coefficient IOUT = 10mA — 8 — (Note 6) IOUT = 150mA — 200 — (VOUT>3.0V) IOUT = 300mA — 350 — Thermal Protection Temperature — 150 — Protection Hysterisys — 20 — f =10kHz,IOUT=50mA,Cbypass=0.1uF — 70 — VEN = 0.4V — 0.1 — VEN = VIN — 20 — Enable Input Voltage Raising, Output Turns On, Logic High 1.6 — — Threshold Voltage Voltage Falling, Output Turns Off, Logic Low — — 0.4 — 600 — Dropout VIN – VOUT Voltage TPROTECTION Thermal Protection PSRR Ripple Rejection IQ Quiescent Current VTH (EN) ILIMIT Current Limit mV/° C mV °C dB μA V 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. E-CMOS Corp. (www.ecmos.com.tw) Page 4 of 8 2007/11/05 EC49509 300mA Low Power Low Noise LDO CMOS Voltage Regulator Typical Performance Characteristics Load Regulation (VIN=4.3V) 3.40 3.40 3.35 3.35 3.30 3.30 VOUT (V) VOUT (V) Line Regulation (IOUT=10mA) 3.25 3.25 3.20 3.20 3.15 3.60 3.15 4.10 VIN (V) 4.60 0 5.10 100 Figure 1. 300 400 Figure 2. IQ VS. VIN(VOUT=3.3V) IQ VS. IOUT(VOUT=3.3V) 32 27.5 30 27.0 IQ (μA) 28 IQ (μA) 200 IOUT (mA) 26 26.5 26.0 24 25.5 22 25.0 20 0 50 100 150 200 IOUT (mA) 250 300 3.6 350 Figure 3. E-CMOS Corp. (www.ecmos.com.tw) 4.0 4.4 4.8 VIN (V) 5.2 5.6 Figure 4. Page 5 of 8 2007/11/05 EC49509 300mA Low Power Low Noise LDO CMOS Voltage Regulator Typical Performance Characteristics (Continued) Load Transient Response (VOUT = 3.3V) Input Transient Response (VOUT = 3.3V) (IOUT=10mA to 300mA) (VIN=3.6V to 5.0V) Figure 6. Figure 5. PSRR (VIN=VOUT+1V+0.5Vp-pAC，IOUT=50mA，Cbypass=0.1μF) 80 70 PSRR (dB) 60 50 40 30 20 10 0 0.1 1 10 Frequency (kHz) 100 Figure 7. E-CMOS Corp. (www.ecmos.com.tw) Page 6 of 8 2007/11/05 EC49509 300mA Low Power Low Noise LDO CMOS Voltage Regulator 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 VOUT 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 VOUT will be pulled to ground. The power dissipation for a given application can be calculated as following: The power dissipation (PD) is PD = IOUT * [VIN – VOUT] The thermal limit of the package is then limited to PD (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 TA is 25°C then the maximum PD is limited to about 0.6W. In other words, if IOUT (MAX) = 300mA, then [VIN – VOUT] cannot exceed 2V. Application Diagram E-CMOS Corp. (www.ecmos.com.tw) Page 7 of 8 2007/11/05 EC49509 300mA Low Power Low Noise LDO CMOS Voltage Regulator OUTLINE DRAWING SOT-23-5L K DIMENSIONS B H DIMN F E C J 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 D A INCHES OUTLINE DRAWING DFN2X2 E-CMOS Corp. (www.ecmos.com.tw) Page 8 of 8 2007/11/05