CYT 6619 500mA LDO Regulator Features General Description The CYT6619 series of high performance low dropout voltage regulators are designed for applications that require efficient conversion and fast transient response. ■ ■ ■ ■ ■ ■ ■ Low Dropout Performance. Guaranteed 500mA Output Current. Wide Input Supply Voltage Range. Over-temperature and Over-current Protection. Rugged 3KV ESD withstand capability. Available in SOT-89-3L Packages. Applications ■ ■ ■ ■ ■ SOT-89 PC-Camera Active SCSI Terminators. High Efficiency Linear Regulators. 5V to 3.3V Linear Regulators Motherboard Clock Supplies. Package ShenZhen CYT IC Design CO ,Ltd 1 CYT 6619 Pin Configuration N: 1.GND 2.IN 3.OUT G: 1.OUT 2.GND 3.IN Typical Application VIN>4.8V VIN VOUT VOUT=3.3V CYT6619-3.3V CIN:10uF COUT:22uF GND Ordering Information CYT6619- X X X PIN (1≥3)：1 G:OUT/GND/IN 2 N: GND/IN/OUT 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 ShenZhen CYT IC Design CO ,Ltd 2 CYT 6619 Absolute Maximum Ratings(1) Symbol Parameter Maximum Units VIN Input Supply Voltage 9 V TJ Operating Junction Temperature Range 0 to 125 ℃ TSTG Storage Temperature Range -40 to 150 ℃ TLEAD Lead Temperature (Soldering 10 Sec) 260 ℃ Electrical Characteristics VIN,MAX≤8V, VIN,MIN – VOUT = 1.5V, IOUT = 10mA, CIN = 10µF, COUT = 22µF, TJ = 0 – 125°C, unless otherwise specified. Symbol VO Parameter Test Condition Min Typ (1) CYT6619T33 3.234 3.3 3.366 V (1) VOUT+1.5V<VIN<8V IOUT=10mA -- 0.3 -- % -- 0.4 -- % -- 10 -- mA -- 1.0 -- V Output Voltage VSR Line Regulation VLR Load Regulation(1) IQ Quiescent Current VD (2) （VIN-VOUT）=1.5V 10mA≤IOUT≤500mA Dropout Voltage IOUT=500mA Max Units IO Minimum Load Current -- 4 -- mA ICL Current Limit -- 0.8 -- A TC Temperature Coefficient -- 0.07 -- %/℃ OTP Thermal Protection -- 175 -- ℃ VN RMS Output Noise -- 0.003 RA Ripple Rejection Ratio -- 35 TA=25℃, 10Hz≤f≤10KHz f =120Hz, COUT=22uF(Tantalum), (VIN-VOUT)=3V,IOUT=500mA Notes: 1. Low duty cycle pulse testing with which TJ remains unchanged. 2. △VOUT=1% ShenZhen CYT IC Design CO ,Ltd 3 %VO -- dB CYT 6619 Application Hints Like any Low dropout regulator,CYT6619 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 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. Thermal Consideration It is important that the thermal limit of the package should not be exceeded. The CYT6619 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 CYT6619. CYT6619 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 2.0V. ShenZhen CYT IC Design CO ,Ltd 4 CYT 6619 Typical Performance Characteristics ShenZhen CYT IC Design CO ,Ltd 5 CYT 6619 Outline Drawing for SOT-89 DIM 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 4.400 4.600 0.159 0.167 4.050 4.250 0.067 0.075 1.700 1.900 0.051 0.059 1.300 1.500 0.094 0.102 2.400 2.600 0.035 0.047 0.890 1.200 0.118REF 3.00REF 0.059REF 1.50REF 0.016 0.020 0.400 0.520 0.055 0.063 1.400 1.600 0.014 0.016 0.350 0.410 10°TYP 10°TYP 0.028REF 0.70REF ShenZhen CYT IC Design CO ,Ltd 6