SC8863-300CSK

150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR March 1, 2000 SC8863 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC8863 is a low dropout linear regulator that operates from a +2.5V to +5.5V 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 powered shutdown, short circuit protection, thermal shutdown protection and reverse battery protection. The SC8863 comes in the tiny 5 lead SOT-23 package. FEATURES • Guaranteed 150 mA output current • 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 • Surface mount packaging (5 pin SOT-23) • Full industrial temperature range APPLICATIONS • Battery Powered Systems • Cellular Telephones • Cordless Telephones • Personal Digital Assistants • Portable Instrumentation • Modems • PCMCIA cards ORDERING INFORMATION Part Number Package (1)(2) BLOCK DIAGRAM SC8863-XXXCSK SOT-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) Add suffix ‘TR’ for tape and reel. ABSOLUTE MAXIMUM RATINGS Parameter Input Supply Voltage Power Dissipation TA = 70°C Thermal Resistance Symbol VIN PD θJA θJC Maximum -0.6 to +7 571 256 81 -40 to +85 -40 to +150 -65 to +150 +300 1.25 Units V mW °C/W °C/W °C °C °C °C kV 1 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 PIN CONFIGURATION Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Sec ESD Rating TA TJ TSTG TLEAD ESD 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR March 1, 2000 SC8863 PIN DESCRIPTIONS Pin # 1 2 3 4 5 Pin Name EN GND IN OUT SET Description 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   TYPICAL APPLICATION - INTERNALLY PRESET OUTPUT VOLTAGE U1 VIN > VOUT + VD(MAX) 3 VIN SC8863 VO 4 VOUT @ IOUT up to 150mA 1 C1 1uF Ceramic EN GND 2 SET 5 C2 1uF Ceramic TYPICAL APPLICATION - EXTERNALLY SET OUTPUT VOLTAGE U1 VIN > VOUT + VD(MAX) 3 VIN SC8863 VO 4 R1 1 EN GND 2 R2 10k SET 5 (1) VOUT @ IOUT up to 150mA C1 1uF Ceramic C2 2.2uF Ceramic NOTES: (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. 2 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR March 1, 2000 SC8863 ELECTRICAL CHARACTERISTICS 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 Conditions Min Typ Max Units VIN IQ IOUT = 0mA 50mA ≤ IOUT ≤ 150mA 2.5 100 5.5 130 160 110 160 200 V µA µA VEN = 0V 0.0001 1 2 µA OUT Output Voltage (1) VOUT IOUT = 1mA 1mA ≤ IOUT ≤ 150mA, VOUT+1V ≤ VIN ≤ 5.5V 2.5V ≤ VIN ≤ 5.5V, SET = OUT, IOUT = 1mA -2.0% -3.5% VOUT +2.0% +3.5% V Line Regulation (1) REG(LINE) 5 10 12 mV Load Regulation (1) REG(LOAD) IOUT = 0mA to 50mA IOUT = 0mA to 100mA IOUT = 0mA to 50mA, SET = OUT IOUT = 0mA to 100mA, SET = OUT -10 -15 -20 mV -15 -20 -25 mV -2.5 -7.5 -15.0 mV -5 -15 -30 mV Dropout Voltage (1)(2) 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 COUT = 100µF f ≤ 1kHz 150 240 90 75 55 350 mA µVRMS dB Power Supply Rejection Ratio 3 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR March 1, 2000 SC8863 ELECTRICAL CHARACTERISTICS (Cont.) Unless specified: VIN = 3.6V, VSET = GND, VEN = VIN, TA = 25°C. Values in bold apply over full operating ambient temperature range. Parameter EN EN Input Threshold Symbol Conditions Min Typ Max Units VIH VIL (3) 1.8 0.4 EN = VIN 0 100 200 V EN Input Bias Current IEN nA SET Sense/Select Threshold SET Reference Voltage (1) VTH VSET IOUT = 1mA 1mA ≤ IOUT ≤ 150mA, 2.5V ≤ VIN ≤ 5.5V 20 1.225 1.206 55 1.250 80 1.275 1.294 mV V SET Input Leakage Current (3) ISET SET = 1.3V 0.015 2.500 5.000 nA OVER TEMPERATURE PROTECTION High Trip Level Hysteresis THI THYST 170 10 °C °C NOTE: (1) Low duty cycle pulse resting with Kelvin corrections required. (2) Defined as the input to output differential at which the output voltage drops 100mV below the value measured at a differential of 2V. (3) Guaranteed by design. 4 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR March 1, 2000 SC8863 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 1.270 1.260 VSET (V) VSET (V) 1.255 1.250 1.245 1.240 1.230 1.235 1.230 1.225 0 25 50 75 IOUT (mA) 100 125 150 1.220 1.210 1.260 VIN = 3.6V TJ = 25°C 1.290 1.280 SET Reference Voltage vs. Junction Temperature vs. Output Current VIN = 3.6V IO = 1mA 1.250 1.240 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 5 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR March 1, 2000 SC8863 TYPICAL CHARACTERISTICS (Cont.) Load Regulation (SET = GND) vs. Junction Temperature 50 45 40 REG(LOAD) (mV) 35 30 25 20 15 5.0 10 5 0 -50 -25 0 25 TJ (°C) 50 75 100 125 IOUT = 0mA to 50mA 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 = GND IOUT = 0mA to 150mA REG(LOAD) (mV) 20.0 17.5 15.0 12.5 10.0 7.5 IOUT = 0mA to 100mA VIN = 3.6V SET = OUT IOUT = 0mA to 150mA Load Regulation (SET = OUT) vs. Junction Temperature Supply Current vs. Output Current 120 110 100 90 80 IQ (µA) 60 50 40 30 20 10 0 0 VIN = 3.6V TJ = 25°C 25 50 75 IOUT (mA) 100 125 150 25 0 -50 -25 IQ (µA) 70 100 75 50 125 150 VIN = 3.6V IOUT = 150mA Supply Current vs. Junction Temperature 0 25 TJ (°C) 50 75 100 125 Current Limit vs. Junction Temperature 350 VIN = 3.6V 300 250 VIH, VIL (V) ILIM (mA) 200 150 100 50 0 -50 -25 0 25 TJ (°C) 50 75 100 125 1.8 1.6 1.4 1.2 1.0 2.0 VIN = 3.6V Enable Input Threshold vs. Junction Temperature VIH VIL 0.8 0.6 0.4 -50 -25 0 25 TJ (°C) 50 75 100 125 6 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR March 1, 2000 SC8863 TYPICAL CHARACTERISTICS (Cont.) Sense/Select Threshold vs. Junction Temperature 80 VIN = 3.6V 70 60 VTH (mV) 50 40 30 COUT = 100µF 20 -50 -25 0 25 TJ (°C) 50 75 100 125 0.01 0.1 1 f (kHz) 10 100 1 COUT = 1µF 10 SC8863-2.8 VIN = 3.6V IOUT = 50mA TJ = 25°C en (µV/√Hz) Output Spectral Noise Density vs. Frequency 0.1 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