CYT 6167 400mA CMOS LDO Regulator Features General Description The CYT6167 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 CYT6167 has low ground current at 65uA, so it can help prolong battery life. The CYT6167 is specially designed for hand-held, battery -powered devices. Typical 175mV dropout voltage at 150mA. ■ 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-23-3L package. ■ Applications ■ ■ ■ ■ CD/DVD-ROM, CD/RW Wireless LAN card, Keyboard, Mouse Battery Powered Equipments PCMCIA Card SOT-23-3L Package ShenZhen CYT IC Design CO ,Ltd 1 CYT 6167 Pin Configuration 1.GND 2.OUT 3.IN SOT-23-3L Application Diagram Ordering/Marking Information CYT6167- X X X Yield periods: A-Z : 1-26 a-z : 27-52 Package Type: L : SOT-23-3L Output Voltage: A : 3.3V B : 2.8V C : 2.5V D : 1.8V E : 1.5V F : 3.0V ShenZhen CYT IC Design CO ,Ltd 2 CYT 6167 Absolute Maximum Ratings(1) Supply Input Voltage (VIN) ..….…..….…..….…..….…..….…..….…..….…..… Power Dissipation (PD) ……..….…..….…..….…..….…..….…..….…..….…..… Junction Temperature (TJ) ….….. ..….…..….…..….…..….…..….…..….…..… Lead Temperature (soldering, 5 sec) ….…. ..….…..….…..….…..….…..….….. Storage Temperature (TS) …. ..….…..….…..….…..….…..….…..….…..….… 6V Internally Limited(3) 0°C to +150°C 260°C -10°C to +150°C Operating Ratings(2) Package Thermal Resistance ………..….…..….…..….…..….…..….…..….…. Supply Input Voltage (VIN) ….…..….…..….…..….…..….…..….…..….…..…. Junction Temperature (TJ) …….. ..….…..….…..….…..….…..….…..….…..… 250°C /W +2.8V to +5.5V 0°C to +125°C Electrical Characteristics VIN = VOUT + 1.0V; CIN = 2.2µF; COUT = 2.2µF; IOUT = 10mA; TJ = 25°C, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units VOUT Output Voltage Accuracy CYT6167-1.5V CYT6167-1.8V CYT6167-2.5V CYT6167-2.8V CYT6167-3.0V CYT6167-3.3V 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 △VOUT/△T Output Voltage Temperature Coefficient Note4 -- 0.025 -- mV/℃ △VOUT/VOUT Line Regulation VIN=4.3V to 6V,IOUT=10mA (VOUT=3.3V) -- 1.0 -- ％/V △VOUT/VOUT Load Regulation(5) VIN=5V IOUT=10 to 400mA (VOUT=3.3V) -- 1.0 -- ％ IOUT=10mA -- 15 -- IOUT=150mA -- 175 -- IOUT=300mA -- 380 -- IOUT=400mA -- 600 -- mV Thermal Protection Temperature -- 150 -- ℃ Protection Hysterisys -- 20 -- ℃ VIN-VOUT TPROTECTION Dropout Voltage(6) Thermal Protection mV PSRR Ripple Rejection F=120Hz -- 59 -- dB IGROUND Ground Current IOUT=10mA -- 65 -- uA ILIMIT Current Limit VOUT=0V -- 600 -- 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: ShenZhen CYT IC Design CO ,Ltd 3 CYT 6167 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. Application Hints Like any Low dropout regulator, CYT6167 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. 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 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 CYT6167 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 250°C/W for CYT6167. CYT6167 is designed to enter thermal protection at 150°C. For example, if TA is 25°C then the max PD is limited to about 0.5W. In other words, if IOUT(MAX) = 400mA, then [VIN – VOUT] can not exceed 1.25V. ShenZhen CYT IC Design CO ,Ltd 4 CYT 6167 Typical Characteristics Line Regulation (VOUT = 3.3V) Load Regulation (VOUT = 3.3V) (VIN = 4.3V to 6V, IOUT = 10mA) (VIN = 5V, IOUT = 10mA to 500mA) Output Voltage vs Temperature IQ vs IOUT (VOUT = 3.3V) (VIN = 5V, IOUT = 10mA) VIN = 5V, IOUT = 10mA to 500mA) PSRR (VOUT = 3.3) Transient Response (VOUT = 3.3V) (VIN = 5V, VPP = 1V) (IOUT = 10mA to 40mA) ShenZhen CYT IC Design CO ,Ltd 5 CYT 6167 OUTLINE DRAWING SOT-23-3L (SC-59) DIM A B C D E F H J K L N DIMENSIONS INCHES MM MIN MAX MIN MAX 0.110 0.120 2.80 3.04 0.047 0.055 1.20 1.40 0.083 0.104 2.10 2.64 0.035 0.040 0.89 1.03 0.070 0.080 1.78 2.05 0.018 0.024 0.45 0.60 0.0005 0.004 0.013 0.10 0.034 0.040 0.887 1.02 0.003 0.007 0.085 0.18 - 0.027 - 0.69 ShenZhen CYT IC Design CO ,Ltd 6