SC8863-330EVB

150mA Ultra Low Dropout, Low Noise Regulator POWER MANAGEMENT Description The SC8863 is a low dropout linear regulator that operates from a +2.5V to +6.0V input range and delivers up to 150mA. A PMOS pass transistor allows the low 110µA supply current to remain independent of load, making these devices ideal for battery operated portable equipment such as cellular phones, cordless phones and personal digital assistants. The SC8863 output voltage can be preset or adjusted with an external resistor divider. Other features include low power shutdown, short circuit protection, thermal shutdown protection and reverse battery protection. The SC8863 comes in the tiny 5 lead SOT-23 package (lead free, fully WEEE and RoHS compliant available) and the ultra low profile 5 lead TSOT-23. SC8863 Features Guaranteed 150mA output current Works with ceramic capacitors Fixed or adjustable output Very small external components Low 75µVRMS output noise Very low supply current Thermal overload protection Reverse battery protection Low power shutdown Full industrial temperature range Very low profile packaging available (1mm max. height) Surface mount packaging (SOT-23-5 and TSOT-23-5) Applications Battery Powered Systems Cellular Telephones Cordless Telephones Personal Digital Assistants Portable Instrumentation Modems PCMCIA cards U1 VIN > VOUT + VD(MAX) 3 IN SC8863 OUT 4 VOUT @ IOUT up to 150mA Typical Application Circuits 1 C1 1uF Ceramic EN GND 2 SET 5 C2 1uF Ceramic Internally Preset Output Voltage U1 VIN > VOUT + VD(MAX) 3 IN SC8863 OUT 4 R1 VOUT @ IOUT up to 150mA 1 EN GND 2 SET 5 R1   VOUT = 1.250 • 1 +  R2   R2 10k C2 2.2uF Ceramic C1 1uF Ceramic Externally Preset Output Voltage(1) Note: (1) Select R1 and R2 such that the current flowing through them is ≥ 10µA (i.e. R2 ≤ 120kΩ). A value of 10kΩ is recommended for R2. Please see Component Selection - Externally Set Output on page 7. Revision: November 8, 2005 1 www.semtech.com SC8863 POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Parameter EN, IN, OUT, SET to GND Output Short Circuit Duration Thermal Resistance, Junction to Ambient Thermal Resistance, Junction to Case Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 sec Symbol VPIN tSC θJ A θJ C TA TJ TSTG TLEAD Maximum -0.3 to +7 Infinite 256 81 -40 to +85 -40 to +150 -65 to +150 300 Units V s °C/W °C/W °C °C °C °C Electrical Characteristics(1) Unless specified: VIN = 3.6V, VSET = GND, VEN = VIN, TA = 25°C. Values in bold apply over full operating ambient temperature range. Parameter IN Supply Voltage Range Supply Current Symbol Test Conditions Min Typ Max Units VIN IQ IOUT = 0mA 2.5 100 6.0 130 160 V µA 50mA ≤ IOUT ≤ 150mA 110 160 200 µA V E N = 0V 0.0001 1 2 µA OUT Output Voltage(2) VOUT IOUT = 1mA 1mA ≤ IOUT ≤ 150mA, VOUT + 1V ≤ VIN ≤ 5.5V Line Regulation(2) REG(LINE) 2.5V ≤ VIN ≤ 5.5V, VSET = VOUT, IOUT = 1mA -2.0% -3.5% 5 VOUT +2.0% +3.5% 10 12 Load Regulation(2) REG(LOAD) IOUT = 0mA to 50mA -10 -15 -20 IOUT = 0mA to 100mA -15 -20 -25 mV mV mV V  2005 Semtech Corp. 2 www.semtech.com SC8863 POWER MANAGEMENT Electrical Characteristics (Cont.)(1) Unless specified: VIN = 3.6V, VSET = GND, VEN = VIN, TA = 25°C. Values in bold apply over full operating ambient temperature range. Parameter Load Regulation (Cont.)(2) Symbol REG(LOAD) Test Conditions IOUT = 0mA to 50mA, VSET = VOUT IOUT = 0mA to 100mA, VSET = VOUT Min Typ -2.5 Max -7.5 -15.0 Units mV -5 -15 -30 mV Dropout Voltage(2)(3) VD IOUT = 1mA IOUT = 50mA IOUT = 100mA 1.1 55 90 120 110 180 240 mV mV mV Current Limit Output Voltage Noise ILIM en PSRR 10Hz to 99kHz, IOUT = 50mA, COUT = 1µF 10Hz to 99kHz, IOUT = 50mA, COUT = 100µF f ≤ 1kHz 150 240 90 75 55 350 mA µVRMS dB Power Supply Rejection Ratio EN EN Input Threshold VIH VIL 1.8 0.4 VEN = VIN 0 100 200 V EN Input Bias Current(4) IEN nA SET Sense/Select Threshold SET Reference Voltage(2) VTH V SET ISET IOUT = 1mA 1mA ≤ IOUT ≤ 150mA, 2.5V ≤ VIN ≤ 5.5V SET Input Leakage Current(4) Over Temperature Protection High Trip Level Hysteresis THI THYST 170 10 °C °C VSET = 1.3V 20 1.225 1.206 0.015 55 1.250 80 1.275 1.294 2.500 5.000 nA mV V Notes: (1) This device is ESD sensitive. Use of standard ESD handling precautions is required. (2) Low duty cycle pulse testing with Kelvin connections required. (3) Defined as the input to output differential at which the output voltage drops 100mV below the value measured at a differential of 2V. (4) Guaranteed by design.  2005 Semtech Corp. 3 www.semtech.com SC8863 POWER MANAGEMENT Pin Configuration Top View Ordering Information Part Number SC8863-XXXCSKTR(1)(2) SC8863-XXXCSKTRT(1)(2)(3) SC8863-XXXTSKTR(1)(2) SC8863-XXXEVB(4) P ackag e SOT-23-5 SOT-23-5 TSOT-23-5 N/A SOT-23-5 & TSOT-23-5 Notes: (1) Where -XXX denotes voltage options. Available voltages are: 2.50V (-250), 2.80V (-280), 3.00V (-300), and 3.30 (-330)V. (2) Only available in tape and reel packaging. A reel contains 3000 devices. (3) Lead free product. Fully WEEE and RoHS compliant. (4) Evaluation board for SC8863. Specify output voltage option and packaging when ordering. Block Diagram Pin Descriptions Pin 1 2 3 4 5 Pin Name Pin Function EN GND IN OUT SET Active high enable pin. Connect to VIN if not being used. Ground pin. Can be used for heatsinking if needed. Input pin. Regulator output, sourcing up to 150mA. Connecting this pin to ground results in the internally preset value for VOUT. Connecting to an external resistor divider changes VOUT to: R1   VOUT = 1 .250 •  1 +  R2    2005 Semtech Corp. 4 www.semtech.com SC8863 POWER MANAGEMENT Typical Characteristics Output Voltage vs. Output Current 2.86 2.85 2.84 2.83 2.82 VOUT (V) VOUT (V) 2.81 2.80 2.79 2.78 2.77 2.76 2.75 2.74 0 25 50 75 IOUT (mA) 100 125 150 VIN = 3.6V TJ = 25°C 2.86 2.85 2.84 2.83 2.82 2.81 2.80 2.79 2.78 2.77 2.76 2.75 2.74 -50 -25 0 25 50 75 100 125 TJ (°C) IO = 1mA IO = 50mA IO = 100mA IO = 150mA Output Voltage vs. Junction Temperature vs. Output Current VIN = 3.6V SET Reference Voltage vs. Output Current 1.275 1.270 1.265 1.260 VSET (V) VSET (V) 1.255 1.250 1.245 1.240 1.235 1.230 1.225 0 25 50 75 IOUT (mA) 100 125 150 VIN = 3.6V TJ = 25°C 1.290 1.280 1.270 1.260 1.250 1.240 1.230 1.220 1.210 SET Reference Voltage vs. Junction Temperature vs. Output Current VIN = 3.6V IO = 1mA IO = 50mA IO = 100mA IO = 150mA -50 -25 0 25 50 75 100 125 TJ (°C) Dropout Voltage vs. Output Current vs. Junction Temperature 250 225 200 175 VD (mV) 150 125 100 75 50 25 0 0 25 50 75 IOUT (mA) 100 125 150 0 -50 -25 -40°C 25°C 125°C Line Regulation vs. Junction Temperature 12 10 8 6 4 2 VIN = 2.5V to 5.5V SET = OUT IOUT = 1mA SET = GND REG(LINE) (mV) 0 25 TJ (°C) 50 75 100 125  2005 Semtech Corp. 5 www.semtech.com SC8863 POWER MANAGEMENT Typical Characteristics (Cont.) Load Regulation (VSET = GND) vs. Junction Temperature 50 45 40 REG(LOAD) (mV) 35 30 25 20 15 10 5 0 -50 -25 0 25 TJ (°C) 50 75 100 125 IOUT = 0mA to 50mA IOUT = 0mA to 100mA VIN = 3.6V SET = GND IOUT = 0mA to 150mA Load Regulation (VSET = VOUT) vs. Junction Temperature 20.0 17.5 15.0 REG(LOAD) (mV) 12.5 10.0 7.5 5.0 2.5 0.0 -50 -25 0 25 TJ (°C) 50 75 100 125 IOUT = 0mA to 50mA IOUT = 0mA to 100mA VIN = 3.6V SET = OUT IOUT = 0mA to 150mA Supply Current vs. Output Current 120 110 100 90 80 IQ (µA) 60 50 40 30 20 10 0 VIN = 3.6V TJ = 25°C 0 25 50 75 IOUT (mA) 100 125 150 25 0 -50 -25 IQ (µA) 70 100 75 50 125 150 Supply Current vs. Junction Temperature VIN = 3.6V IOUT = 150mA 0 25 TJ (°C) 50 75 100 125 Current Limit vs. Junction Temperature 350 300 250 VIH, VIL (V) ILIM (mA) 200 150 100 50 0 -50 -25 0 25 TJ (°C) 50 75 100 125 VIN = 3.6V 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 -50 Enable Input Threshold vs. Junction Temperature VIN = 3.6V VIH VIL -25 0 25 TJ (°C) 50 75 100 125  2005 Semtech Corp. 6 www.semtech.com SC8863 POWER MANAGEMENT Typical Characteristics (Cont.) Sense/Select Threshold vs. Junction Temperature 80 70 60 VTH (mV) 50 40 30 20 -50 -25 0 25 TJ (°C) 50 75 100 125 0.01 0.1 1 f (kHz) 10 100 1 COUT = 1µF 10 Output Spectral Noise Density vs. Frequency SC8863-2.8 VIN = 3.6V IOUT = 50mA TJ = 25°C VIN = 3.6V en (µV/√Hz) 0.1 COUT = 100µF Applications Information Theory Of Operation The SC8863 is intended for applications where very low dropout voltage, low supply current and low output noise are critical. It provides a very simple, low cost solution that uses very little pcb real estate. Fixed output voltage options require the use of only two external capacitors for operation. Each voltage option has both fixed and adjustable output voltage modes. Grounding the SET pin (pulling it below the Sense/Select threshold of 55mV) will connect the internal resistor divider to the error amplifier resulting with the internally preset output voltage. If SET is pulled above this threshold, then the Sense/Select switch will connect the SET pin to the error amplifier. The output will be regulated such that the voltage at SET will equal VSET, the SET reference voltage (typically 1.250V). An active high enable pin (EN) is provided to allow the customer to shut down the part and enter an extremely low power Off-state. A logic Low signal will reduce the supply current to 0.1nA. Component Selection - General Output capacitor: Semtech recommends a minimum capacitance of 1µF at the output with an equivalent series resistance (ESR) of