SE5117

SE5117 ESTEK | Alldatasheet

Document overview

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Technical content

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 vol tage accuracy i s 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. Pin Configuration 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. Front View Application Active SCSI terminators. Post regulators for switching supplies. Battery chargers. 1 2 3 SOT-223 High-efficiency linear power supplies. Computer motherboard, display, graphic card DC/DC converter, such as 3.3V to 2.8V or 3.3V to 2.5V.

Ordering Information

SE5117 _ _ _ PIN (1=>3): 1. G: OUT/GND/IN Application Diagram Package Type: 1. S: SOT- 223 Vin M0 Vout C1 R2 3.3V Output Voltage: 1. A: VOUT = 3.3V 2. B: VOUT = 2.8V 3. C: VOUT = 2.5V C=10u gnd 1.25V Ref Control Logic Over Current Protection Thermal Protection C=10u rload gnd 4. D: VOUT = 1.8V 5. E: VOUT = 1.5V 6. F: VOUT = 3.0V gnd 1 BEIJING ESTEK ELECTRONICS CO.,LTD

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.) TLEAD 260 ° C Storage Temperature TSTG -10 to +150 ° C Operating Ratings(2) Parameter Symbol Value Unit 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

Electrical Characteristics

VIN = VOUT + 1.0V (VIN,MIN = 3V); COUT = 4.7µF, IOUT =100µ A; TJ =25° C,unless otherwise specified. SE5117 Symbol Parameter Conditions Min Typ Max Units 10mA ≤ IOUT ≤ 1A, TA=25° C, VOUT Output Voltage Accuracy Output Voltage 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 ∆VOUT /∆T Temperature Coefficient Note 4 -- 40 -- ppm/° C ∆VOUT / VOUT Line Regulation VIN = VOUT + 1V to 5.5V -- 0.3 -- % ∆VOUT / VOUT Load Regulation(5) IOUT =10mA to 1A(5) -- 0.5 -- IOUT =10mA -- 9 -- VIN - VOUT Dropout (6)Voltage VOUT<2V VOUT>2V IOUT =500mA -- 530 -- IOUT =1A -- 1050 IOUT =10mA -- 5.5 IOUT =150mA -- 90 IOUT =500mA -- 300 -- mV mV TPROTECTION Thermal Protection Temperature -- 150 -- ° C Protection Hysterisys -- 30 -- ° C PSRR Ripple Rejection f =120Hz -- 75 -- dB IGROUND Ground Current IOUT=10mA -- 1 -- mA I Current Limit V =0V -- 1.5 -- 3 BEIJING ESTEK ELECTRONICS CO.,LTD

Application Hints Thermal Consideration SE5117 Like any Low dropout regulator, SE5117 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. 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: 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 is10uF but once again its value can be increased without limit. The thermal limit of thepackage 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°C. For example, if TA is 25° C then the maxPD is limited to about1W. In other words, if IOUT(MAX) = 1A, then [VIN –VOUT] can not exceed 1V. 4 BEIJING ESTEK ELECTRONICS CO.,LTD

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