500mA CMOS LDO Regulator CYT6118 Features Description The CYT6118 is an efficient linear voltage regulator. It has extra low dropout voltage. At light ¾ Typical 90mV dropout voltage at 150mA. ¾ Guaranteed 500mA output over the full operating temperature range. loads the typical dropout voltage is 4.6mV, at full ¾ Low 300mV typical dropout voltage at full load. ¾ Extremely tight load and line regulation. ¾ Low temperature coefficient. ¾ Current and thermal limiting. help prolong battery life. The CYT6118 is specially ¾ No-load stability. designed for hand-held, battery-powered devices. ¾ Standard SOT-89-3 package. load the typical dropout voltage is 300mV. The output voltage accuracy is better than 2%. The CYT6118 has low ground current, so it can Pin Configuration Applications Top view 2 1 3 ¾ Active SCSI terminators. ¾ Post regulators for switching supplies. ¾ Battery chargers. ¾ High-efficiency linear power supplies. ¾ Computer motherboard, display, graphic card DC/DC converter, such as 5V to 3.3V, 3.3V to SOT-89 2.8V or 3.3V to 2.5V. Typical Application Ordering Information CYT6118 _ _ _ Vin 5V C1 C=10u C0 C=10u Control Logic gnd 1.25V Ref 3.3V Vout M0 Over Current Protection R2 rload PIN (1=>3): 1. G: OUT/GND/IN gnd Package Type: 1. K: SOT-89-3L Thermal Protection Output Voltage: 1. A: VOUT = 3.3V gnd 2. B: VOUT = 2.8V 3. C: VOUT = 2.5V 4. D: VOUT = 1.8V 5. E: VOUT = 1.5V All contents are subject to change without prior notice. 1 500mA CMOS LDO Regulator Absolute Maximum Ratings(1) CYT6118 Operating Ratings(2) Supply Input Voltage (VIN) ..……….… -0.7V to +7V Supply Input Voltage (VIN) ……...…… +2.5V to +6V (3) Power Dissipation (PD) …………. Internally Limited Junction Temperature (TJ) …….….. 0°C to +125°C Junction Temperature (TJ) …….….. 0°C to +125°C Package Thermal Lead Temperature (soldering, 5 sec.) ….…. 260°C Resistance …………………………………120°C /W Storage Temperature (TS) ………. -10°C to +150°C Electrical Characteristics VIN = VOUT + 1.0V; COUT = 4.7µF, IOUT = 10mA; TJ = 25°C;unless otherwise specified. Symbol VOUT ∆VOUT /∆T ∆VOUT / VOUT ∆VOUT / VOUT Parameter Conditions Min Typ Max Units 1.470 1.764 2.450 2.744 3.234 1.5 1.8 2.5 2.8 3.3 1.530 1.836 2.550 2.856 3.366 V -- 40 -- ppm/℃ VIN = VOUT + 1V to 5.5V -- 0.3 -- % (5) -- 0.5 -- % IOUT =10mA -- 9 -- IOUT =150mA -- 175 -- Dropout IOUT =500mA -- 530 -- Voltage(6) IOUT =10mA -- 4.6 -- IOUT =150mA -- 90 -- IOUT =500mA -- 300 -- Thermal Protection Temperature -- 150 -- ºC Protection Hysterisys -- 30 -- ºC Output Voltage Accuracy Output Voltage Temperature Coefficient Line Regulation Load Regulation (5) VOUT<2V VIN - VOUT VOUT>2V TPROTECTION Thermal Protection CYT6118-1.5V CYT6118-1.8V CYT6118-2.5V CYT6118-2.8V CYT6118-3.3V Note 4 IOUT =10mA to 500mA mV mV PSRR Ripple Rejection f =120Hz -- 35 -- dB IGROUND Ground Current IOUT=10mA -- 1 -- mA ILIMIT Current Limit VOUT =0V -- 1.5 -- A All contents are subject to change without prior notice. 2 500mA CMOS LDO Regulator CYT6118 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 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. All contents are subject to change without prior notice. 3 500mA CMOS LDO Regulator CYT6118 Application Hints Thermal Consideration Like any Low dropout regulator, CYT6118 requires It is important that the thermal limit of the package external capacitors to ensure stability. The external should not be exceeded. The CYT6118 has built-in capacitors must be carefully selected to ensure the thermal protection. When the thermal limit is performances. 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: Input Capacitor: An Input Capacitor of at least 10uF is required. Ceramic or Tantalum can be used. The value can The Power Dissipation (PD) is be increased without upper limit. PD = IOUT * [VIN – VOUT] Output Capacitor: The thermal limit of the package is then limited to An Output Capacitor is required for look stability. It PD(MAX) = [TJ – TA]/θJA where TJ is the junction must be located no more than 1cm away from the temperature, TA is ambient temperature, and θJA is VOUT pin, and connected directly between VOUT and around 120°C/W for CYT6118. CYT6118 is designed GND pins. The minimum value is 10uF but once to enter thermal protection at 150°C. For example, if again its value can be increased without limit. TA is 25°C then the max PD is limited to about 1W. In other words, if IOUT(MAX) = 500mA, then [VIN – VOUT] can not exceed 2.1V. All contents are subject to change without prior notice. 4 500mA CMOS LDO Regulator CYT6118 Typical Performance Characteristics (VIN = 5V, CIN = 1µF, COUT = 10µF, TA=25°C, unless otherwise noted.) Output Voltage vs Temperature 3.5 3.5 3 3 Output Voltage (V) Output Voltage Load Regulation 1.5V 1.8V 2.5V 3.3V 2.5 2 1.5V 1.8V 2.5V 3.3V 2.5 2 1.5 1.5 1 1 0 100 200 300 400 500 0 600 50 100 150 Temperature (C) Output Current (mA) Quiescent Current vs Temperature (Output Voltage @ 2.5V) Dropout Voltage vs Output Current 0.5 Dropout Voltage (V) Quiescent Current (mA) 0.6 1.17 1.16 1.15 1.14 1.13 1.12 1.11 1.1 1.09 1.08 1.07 1.06 0.4 1.5V 1.8V 2.5V 3.3V 0.3 0.2 0.1 0 0 20 40 60 80 100 120 140 0 Temperature (C) 100 200 300 400 500 600 Output Current (mA) Line Transient Load Transient (10mA – 500mA) All contents are subject to change without prior notice. 5 500mA CMOS LDO Regulator CYT6118 Outline Drawing for SOT-89 DIM SOT-89 A C D J M K E F B L H G I A B C D E F G H I J K L M 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 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 0.016 0.020 0.055 0.063 0.014 0.016 10°TYP 0.028REF 0.400 0.520 1.400 1.600 0.350 0.410 10°TYP 0.70REF All contents are subject to change without prior notice. 6