EC49124 E-CMOS | Alldatasheet

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Technical content

500mA Super LDO Linear Regulator C o n v e r t e r DESCRIPTIONS The EC49124 is an efficient linear voltage regulator. It has extra low dropout voltage. At light loads the typical dropout voltage is 15mV, at full load the typical dropout voltage is 800mV. The output voltage accuracy is better than 2%. The EC49124 has low ground current at 65uA, so it can help prolong battery life. The EC49124 is specially designed for hand-held, battery-powered devices. FEATURE ■ Typical 175mV dropout voltage at 150mA. ■ Low Ground current at 65uA. (Typ.) ■ Guaranteed 500mA output over the full operating temperature range. ■ Extremely tight load and line regulation. ■ Low temperature coefficient. ■ Current and thermal limiting. ■ No-load stability. ■ Standard SOT-89-3L package. APPLICATION ■ Active SCSI terminators. ■ Post regulators for switching supplies. ■ Battery chargers. ■ High-efficiency linear power supplies. ■ Computer motherboard, display, graphic card

ORDERING INFORMATION

B6：SOT89-3L Pin type： PIN (1=>3) G: OUT/GND/IN N: GND/IN/OUT G O U T G N Output voltage： 1.5V＝15 1.8V＝18 2.5V＝25 2.8V＝28 3.0V＝30 3.3V＝33 3.4V＝34 R：Tape & Reel

500mA Super LDO Linear Regulator C o n v e r t e r Pin Configuration Typical Application Absolute Maximum Ratings(1) Operating Ratings(2) Storage Temperature (TS) ………….. -40°C to +150°C Part Number Package Marking Marking Information EC49124-XX-B6GR SOT89-3L 49124 XXYWG XX：Output Voltage(Ex：15=1.5V) YW：Date Code EC49124-XX-B6NR SOT89-3L 49124 XXYWN EC49124-33

500mA Super LDO Linear Regulator C o n v e r t e r Symbol Parameter Conditions Min Typ Max Units VOUT Output Voltage Accuracy EC49124-1.5V(VIN=3.3V) EC49124-1.8V(VIN=3.3V) EC49124-2.5V EC49124-2.8V EC49124-3.0V EC49124-3.3V 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 /ΔT Output Voltage Temperature Coefficient Note 4 -- 50 -- ppm/℃ ΔVOUT / VOUT Line Regulation VIN = VOUT + 1V to 5.5V -- 1 -- % ΔVOUT / VOUT Load Regulation(5) IOUT =10mA to 250mA(5) -- 1 -- IOUT =10mA to 400mA(5) -- 1.5 -- VIN - VOUT Dropout Voltage(6) IOUT =10mA -- 15 -- mV IOUT =150mA -- 175 -- IOUT =250mA -- 320 -- IOUT =500mA -- 800 -- TPROTECTION Thermal Protection Thermal Protection Temperature -- 150 -- ℃ Protection Hysterisys -- 20 -- ℃ PSRR Ripple Rejection f =120Hz -- 51 -- dB IGROUND Ground Current IOUT =10mA -- 65 -- uA ILIMIT Current Limit VOUT =0V -- 700 -- mA

Electrical Characteristics

VIN = 5V; CIN = 2.2μF; COUT = 2.2μF（Electrolytic capacitor）; IOUT = 10mA; TJ = 25°C; unless otherwise noted. 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 theregulator will go into thermal shutdown. See Table 1 and the “Thermal Considerations” 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 100μA 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

500mA Super LDO Linear Regulator C o n v e r t e r Application Hints Like any Low dropout regulator, EC49124 requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure the performances. Input Capacitor: An Input Capacitor of at least 2.2uF is required. The inexpensive Electrolytic capacitor is preferred. The value can be increased without upper limit. Output Capacitor: An Output Capacitor is required for look stability. It must be located no more than 1cm away from the VOUT pin, and connected directly between VOUT and GND pins. The inexpensive Electrolytic capacitor is recommended. The minimum value is 2.2uF but once again its value can be increased without limit. Thermal Consideration It is important that the thermal limit of the package should not be exceeded. The EC49124 has built-in thermal protection. When the thermal limit is exceeded, the IC will enter protection, and the VOUT will be reset to zero. The power dissipation for a given application can be calculated as follows: 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 ambient temperature, and θJA is around 180°C/W for EC49124. EC49124 is designed to enter thermal protection at 150°C. For example, if TA is 25°C then the max PD is limited to about 0.7W. In other words, if IOUT(MAX) = 500mA, then [VIN –VOUT] can not exceed 1.4V.

500mA Super LDO Linear Regulator C o n v e r t e r Typical Performance Characteristics (VIN = 5V, CIN = 2.2μF, COUT = 2.2μF, TA=25°C, unless otherwise noted.)

500mA Super LDO Linear Regulator C o n v e r t e r Outline Drawing for SOT-89