SE5117 Description Features Typical 90mV dropout voltage at 150mA. 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%. Guaranteed 1A output over the full operating temperature range. 650mV typical dropout voltage at full load. Extremely tight load and line regulation. The SE5117 has low ground current, so it can Low temperature coefficient. help prolong battery life. The SE5117 is specially Current and thermal limiting. designed for hand-held, battery-powered devices. No-load stability. Standard SOT-223 package. Pin Configuration Application Front View 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 Vin 5V 3.3V Vout M0 C1 C=10u C0 C=10u R2 rload 2. B: VOUT = 2.8V 3. C: VOUT = 2.5V 4. D: VOUT = 1.8V Control Logic gnd 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 Symbol Value Unit Supply Input Voltage VIN -0.7 to +7 V Power Dissipation PD Internally Limited(3) -- Junction Temperature TJ 0 to +125 °C Lead Temperature (soldering, 5 sec.) Storage Temperature TLEAD 260 TSTG °C -10 to +150 °C Value Unit Operating Ratings(2) Parameter Symbol Supply Input Voltage VIN +2.5 to +6 V Junction Temperature TJ 0 to +125 °C Package Thermal Resistance θJA 135 (SOT-223) °C/W 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 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 1A. 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. 2 BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 Electrical Characteristics VIN = VOUT + 1.0V (VIN,MIN = 3V); COUT = 4.7µF, IOUT =100µA; TJ =25°C, unless otherwise specified. Symbol Parameter Output Voltage VOUT ∆VOUT /∆T Accuracy Conditions Min Typ Max Units 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 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 V V V V Output Voltage Note 4 Temperature Coefficient ∆VOUT / VOUT Line Regulation ∆VOUT / VOUT Load Regulation % (5) -ppm/°C VIN = VOUT + 1V to 5.5V IOUT =10mA to 1A (5) -- 40 0.3 -- --- 0.5 -- IOUT =10mA -- 9 -- IOUT =500mA -- 530 -- IOUT =1A -- -- 1050 IOUT =10mA -- -- 5.5 IOUT =150mA -- -- 90 IOUT =500mA --- 300 Protection Hysterisys -- f =120Hz -- mV VOUT<2V Dropout VIN - VOUT (6) Voltage VOUT>2V TPROTECTION PSRR IGROUND I Thermal Protection Temperature Ripple Rejection Ground Current % mV IOUT=10mA mA Current Limit V 3 =0V -150 -- °C 30 -- °C 75 -- dB 1 -- --- 1.5 -- BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 Application Hints Thermal Consideration Like any Low dropout regulator, SE5117 requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure the performances. It is important that the thermal limit of the package should not be exceeded. The SE5117 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: Input Capacitor: An Input Capacitor of at least 10uF is required. The Power Dissipation (PD) is Ceramic or Tantalum can be used. The value can PD = IOUT * [VIN –VOUT] be increased without upper limit. Output Capacitor: must be located no more than 1cm away from the 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 VOUT pin, and connected directly between VOUT and to enter thermal protection at 150°C. For example, if GND pins. The minimum value is 10uF but once TA is 25°C then the max PD is limited to about 1W. In again its value can be increased without limit. other words, if IOUT(MAX) = 1A, then [VIN –VOUT] can An Output Capacitor is required for look stability. It not exceed 1V. 4 BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 5 BEIJING ESTEK ELECTRONICS CO.,LTD SE5117 6 BEIJING ESTEK ELECTRONICS CO.,LTD