CYT6119

400mA Super LDO Linear Regulator Description The CYT6119 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 600mV. The output voltage accuracy is better than 2%. The CYT6119 has low ground current at 65uA, so it can help prolong battery life. The CYT6119 is specially designed for hand-held, battery-powered devices. CYT6119 Features Typical 175mV dropout voltage at 150mA. Low Ground current at 65uA. (Typ.) Guaranteed 400mA 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-89-3 package. Pin Configuration Top view Applications Active SCSI terminators. Post regulators for switching supplies. Battery chargers. High-efficiency linear power supplies. 1 2 3 Computer motherboard, display, graphic card DC/DC converter, such as 5V to 3.3V, 3.3V to 2.8V or 3.3V to 2.5V. SOT-89 Typical Application Ordering Information CYT6119 _ _ _ 5V Vin C0 C=10u M0 Vout C1 C=10u 3.3V R2 rload PIN (1=>3): 1. G: OUT/GND/IN 2. N: GND/IN/OUT gnd Control Logic gnd 1.25V Ref Over Current Protection gnd Thermal Protection Package Type: 1. K: SOT-89-3L Output Voltage: 1. A: VOUT = 3.3V 2. B: VOUT = 2.8V 3. C: VOUT = 2.5V 4. D: VOUT = 1.8V 5. E: VOUT = 1.5V 6. F: VOUT = 3.0V All contents are subject to change without prior notice. 1 400mA Super LDO Linear Regulator Absolute Maximum Ratings(1) Supply Input Voltage (VIN) ..………..……………….+6V Power Dissipation (PD) ………….. Internally Limited (3) CYT6119 Operating Ratings(2) Supply Input Voltage (VIN) ……..…… +2.8V to +5.5V Junction Temperature (TJ) …….…….. 0°C to +125°C Package Thermal Resistance …………………………………… 180°C/W Junction Temperature (TJ) ………................….. 150°C Lead Temperature (soldering, 5 sec.) ……....…. 260°C Storage Temperature (TS) ………….. -10°C to +150°C Electrical Characteristics VIN = VOUT + 1.0V; CIN = 2.2µF; COUT = 2.2µF, IOUT = 10mA; TJ = 25°C, unless otherwise specified. Symbol Parameter Conditions CYT6119-1.5V CYT6119-1.8V VOUT Output Voltage Accuracy CYT6119-2.5V CYT6119-2.8V CYT6119-3.0V CYT6119-3.3V ∆VOUT /∆T ∆VOUT / VOUT ∆VOUT / VOUT Output Voltage Temperature Coefficient Line Regulation Load Regulation (5) Min 1.470 1.764 2.450 2.744 2.940 3.234 --------------- Typ 1.5 1.8 2.5 2.8 3.0 3.3 50 1 1 1.5 15 175 320 600 150 20 51 65 110 600 Max 1.530 1.836 2.550 2.856 3.060 3.366 --------------- Units V Note 4 VIN = VOUT + 1V to 5.5V IOUT =10mA to 250mA(5) IOUT =10mA to 400mA(5) IOUT =10mA ppm/℃ % % VIN - VOUT Dropout Voltage(6) IOUT =150mA IOUT =250mA IOUT =400mA mV TPROTECTION PSRR IGROUND ILIMIT Thermal Protection Ripple Rejection Ground Current Current Limit Thermal Protection Temperature Protection Hysterisys f =120Hz IOUT =10mA IOUT =400mA VOUT =0V ℃ ℃ dB uA mA All contents are subject to change without prior notice. 2 400mA Super LDO Linear Regulator Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function outside its operating rating. CYT6119 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 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 400mA. 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. All contents are subject to change without prior notice. 3 400mA Super LDO Linear Regulator Application Hints Like any Low dropout regulator,CYT6119 requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure the performances. CYT6119 Thermal Consideration It is important that the thermal limit of the package should not be exceeded. The CYT6119 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 CYT6119. CYT6119 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) = 400mA, then [VIN – VOUT] can not exceed 1.75V. Input Capacitor: An Input Capacitor of at least 10uF is required. Ceramic or Tantalum can be used. 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 minimum value is 10uF but once again its value can be increased without limit. All contents are subject to change without prior notice. 4 400mA Super LDO Linear Regulator Typical Performance Characteristics (VIN = 5V, CIN = 1µF, COUT = 10µF, TA=25°C, unless otherwise noted.) Load Regulation 3.5 3 CYT6119 Output Voltage vs Temperature 3.5 3 Output Voltage (V) 1.5V 1.8V 2.5V 3.3V Output Voltage 2.5 2 1.5 1 0 100 200 300 400 500 600 Output Current (mA) 2.5 2 1.5 1 0 50 100 150 Temperature (C) 1.5V 1.8V 2.5V 3.3V Quiescent Current vs Temperature (Output Voltage @ 2.5V) 0.6 Dropout Voltage vs Output Current 1.17 1.16 1.15 1.14 1.13 1.12 1.11 1.1 1.09 1.08 1.07 1.06 0 20 40 60 80 100 120 140 Temperature (C) 0.5 Dropout Voltage (V) Quiescent Current (mA) 0.4 0.3 0.2 0.1 0 0 100 200 300 400 500 600 Output Current (mA) 1.5V 1.8V 2.5V 3.3V Line Transient Load Transient (10mA – 500mA) All contents are subject to change without prior notice. 5 400mA Super LDO Linear Regulator Outline Drawing for SOT-89 DIM SOT-89 A C D K L M J CYT6119 N DIMENSIONS INCHES MM MIN MAX MIN MAX 0.173 0.181 0.159 0.167 0.067 0.075 0.051 0.059 0.094 0.102 0.035 0.047 0.118REF 0.059REF 0.016 0.020 0.055 0.063 0.014 0.016 10°TYP 0.028REF 4.400 4.600 4.050 4.250 1.700 1.900 1.300 1.500 2.400 2.600 0.890 1.200 3.00REF 1.50REF 0.400 0.520 1.400 1.600 0.350 0.410 10°TYP 0.70REF H G I A B C D E F G H I J K L M B F E All contents are subject to change without prior notice. 6