SE5117

SE5117 Description The SE5117 is an efficient linear voltage regulator. It has extra low dropout voltage. At light loads the typical dropout voltage is 5.5mV, and at full load the typical dropout voltage is 650mV. The output voltage accuracy is better than 2%. The SE5117 has low ground current, so it can help prolong battery life. The SE5117 is specially designed for hand-held, battery-powered devices. Features Typical 90mV dropout voltage at 150mA. Guaranteed 1A output over the full operating temperature range. 650mV typical dropout voltage at full load. Extremely tight load and line regulation. Low temperature coefficient. Current and thermal limiting. No-load stability. Standard SOT-223 package. Pin Configuration Front View Application Active SCSI terminators. Post regulators for switching supplies. Battery chargers. 1 2 3 High-efficiency linear power supplies. Computer motherboard, display, graphic card DC/DC converter, such as 3.3V to 2.8V or 3.3V SOT-223 to 2.5V. Ordering Information SE5117 _ _ _ PIN (1=>3): 1. G: OUT/GND/IN Application Diagram Package Type: 1. S: SOT223 Output Voltage: 1. A: VOUT = 3.3V 5V Vin C0 C=10u M0 Vout C1 C=10u 3.3V R2 rload 2. B: VOUT = 2.8V 3. C: VOUT = 2.5V 4. D: VOUT = 1.8V gnd Control Logic gnd 5. E: VOUT = 1.5V 6. F: VOUT = 3.0V 1.25V Ref Over Current Protection Thermal Protection gnd 1 BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 Absolute Maximum Rating Parameter Supply Input Voltage Power Dissipation Junction Temperature Lead Temperature (soldering, 5 sec.) Storage Temperature TLEAD TSTG -10 to +150 260 ° C ° C VIN PD TJ Symbol Value -0.7 to +7 Internally Limited(3) 0 to +125 Unit V -° C Operating Ratings(2) Parameter Supply Input Voltage Junction Temperature Package Thermal Resistance VIN TJ θJA Symbol Value +2.5 to +6 0 to +125 135 (SOT-223) Unit V ° C ° C/W Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function ou tside its operating rating. Note 3: The maximum allo wable power dissipation at any TA (ambient temperature) is calculated usi ng: PD(max) = (TJ(max) - TA)/θJA. Exceeding the ma ximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See the “ hermal Considerations”section for de tails. T Note 4: Output voltage temperatu re coefficient is the worst-case voltage change divided b y the total temperatu re range. Note 5: Regulation is measured at cons tant junction temperatu re using low duty cycle pulse testing. Par ts are tested for load regulation in the load range from 100µA to 1A. Changes in output voltage due to heating e ffects are covered by the thermal regulation specification. Note 6: Dropout voltage is defined as the input to output differential at which the output vol tage drops 2% below its nominal value measured at 1V differential. 2 BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 Electrical Characteristics VIN = VOUT + 1.0V (VIN,MIN = 3V); COUT = 4.7µF, IOUT =100µA; TJ =25° unless otherwise specified. C, Symbol Parameter Conditions 10mA ≤ IOUT ≤ 1A, TA=25° C, SE5117-1.5, 3.0V ≤ VIN ≤ 5.5V SE5117-1.8, 3.0V ≤ VIN ≤ 5.5V SE5117-2.5, 3.5V ≤ VIN ≤ 5.5V SE5117-2.8, 3.8V ≤ VIN ≤ 5.5V SE5117-3.0, 4.0V ≤ VIN ≤ 5.5V SE5117-3.3, 4.3V ≤ VIN ≤ 5.5V Note 4 VIN = VOUT + 1V to 5.5V IOUT =10mA to 1A IOUT =10mA (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 Max 1.530 1.836 2.550 2.856 3.060 3.366 40 -0.5 Units VOUT Output Voltage Accuracy V V V V V ∆VOUT /∆T ∆VOUT / VOUT ∆VOUT / VOUT Output Voltage Temperature Coefficient Line Regulation Load Regulation % (5) -ppm/° C -----------300 9 530 0.3 -% --mV -- VOUT2V IOUT =1A -IOUT =10mA -IOUT =150mA -IOUT =500mA 1050 5.5 mV 90 -150 ----1 TPROTECTION Thermal Protection Temperature Protection Hysterisys ° C ° C dB --- 30 75 PSRR IGROUND I Ripple Rejection Ground Current Current Limit f =120Hz IOUT=10mA mA V =0V -- 1.5 3 BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 Application Hints Like any Low dropout regulator, SE5117 requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure the performances. Thermal Consideration It is important that the thermal limit of the package should not be exceeded. The SE5117 has built-in thermal protection. W hen 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: 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. The Power Dissipation (PD) is PD = IOUT * [VIN – VOUT] 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. 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 135° C/W for SE5117. SE5117 is designed to enter thermal protection at 150° For example, if C. TA is 25° then the max PD is limited to about 1W. In C other words, if IOUT(MAX) = 1A, then [VIN – VOUT] can not exceed 1V. 4 BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 5 BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 6 BEIJING ESTEK ELECTRONICS CO.,LTD