Dual 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR PRELIMINARY - June 15, 2000 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION FEATURES • Two guaranteed 150 mA outputs • Designed to operate with ceramic capacitors • Fixed or adjustable outputs • Very small external components • Low 75µVRMS output noise • Very low supply currents • Thermal overload protection • Reverse battery protection • Individual low power shutdown • Surface mount packaging (10 pin MSOP) • Full industrial temperature range The SC1456 contains two low dropout linear regulators that operate from a +2.5V to +6V input range and deliver up to 150mA. PMOS pass transistors allow a low 110µA supply current per device to remain independent of load, making these devices ideal for battery operated portable equipment such as cellular phones, cordless phones and personal digital assistants. Each device can be powered from a separate supply voltage or the same supply voltage for maximum flexibility. The output voltage of each device can be preset or adjusted with an external resistor divider. Other features include independant low powered shutdown, short circuit protection, thermal shutdown protection and reverse battery protection for each regulator. The SC1456 comes in the tiny 10 lead MSOP package. APPLICATIONS • Battery Powered Systems • Cellular Telephones • Cordless Telephones • Personal Digital Assistants • Portable Instrumentation • Modems • PCMCIA cards ORDERING INFORMATION Part Number SC1456XIMSTR SC1456 Package (1)(2) MSOP-10 Notes: (1) Where X denotes voltage options - see table on page 4. Consult factory for other voltage options. (2) Only available in tape and reel packaging. A reel contains 2500 devices. TYPICAL APPLICATIONS U1 10 VIN1 1 5 VIN2 (OR VIN1) 6 C1 1uF SC1456 IN1 OUT1 EN1 OUT2 IN2 SET1 EN2 SET2 C2 1uF GND 9 VOUT1 = PRESET 4 VOUT2 = PRESET 3 8 C3 1uF GND 2 C4 1uF 7 Output Voltages Set Internally U1 10 VIN1 1 5 VIN2 (OR VIN1) 6 C1 1uF C2 1uF SC1456 IN1 OUT1 EN1 OUT2 IN2 SET1 EN2 SET2 GND 2 9 VOUT1 (SEE EQUATION) 4 VOUT2 = PRESET 3 R1 8 C3 2.2uF GND 7 R2 C4 1uF R1 VOUT1 = 1.250 • 1 + R2 R 2 ≤ 120 kΩ Output 1 Set Externally and Output 2 Set Internally 1 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 Dual 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR SC1456 PRELIMINARY - June 15, 2000 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Maximum Units Input Supply Voltage VIN -0.3 to +7 V Thermal Resistance Junction to Ambient θJA 113 °C/W Operating Ambient Temperature Range TA -40 to +85 °C Operating Junction Temperature Range TJ -40 to +125 °C Storage Temperature Range TSTG -65 to +150 °C Lead Temperature (Soldering) 10 seconds TLEAD 300 °C ESD Rating (Human Body Model) ESD 1.25 kV 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 Symbol Conditions Min Typ Max Units 6.0 V 130 µA IN1, IN2 Supply Voltage Range VIN Supply Current IQ 2.5 IOUT = 0mA 90 160 50mA ≤ IOUT ≤ 150mA 110 160 µA 200 VEN = 0V 0.0001 1 µA 2 OUT1, OUT2 (2) Output Voltage VOUT (2) REG(LINE) Line Regulation IOUT = 1mA -2.0% 1mA ≤ IOUT ≤ 150mA, VOUT+1V ≤ VIN ≤ 5.5V -3.5% 2.5V ≤ VIN ≤ 5.5V, VSET = VOUT, IOUT = 1mA VOUT +2.0% V +3.5% 5 10 mV 12 (2) Load Regulation REG(LOAD) IOUT = 0mA to 50mA -10 -15 mV -20 IOUT = 0mA to 100mA -15 -20 mV -25 IOUT = 0mA to 50mA, VSET = VOUT -2.5 -7.5 mV -15.0 IOUT = 0mA to 100mA, VSET = VOUT -5 -15 mV -30 2 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 Dual 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR SC1456 PRELIMINARY - June 15, 2000 (1) 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 Symbol Conditions Min Typ VD IOUT = 1mA 1.1 IOUT = 50mA 55 Max Units OUT1, OUT2 (Cont.) (2)(3) Dropout Voltage mV 90 mV 120 IOUT = 100mA 110 180 mV 240 Current Limit ILIM Output Voltage Noise en Power Supply Rejection Ratio PSRR 150 240 10Hz to 99kHz, IOUT = 50mA, COUT = 1µF 90 COUT = 100µF 75 f = 120Hz 55 350 mA µVRMS dB EN1, EN2 EN Input Threshold VIH V 1.8 VIL (4) IEN EN Input Bias Current 0.4 VEN = VIN 0 100 nA 200 SET1, SET2 Sense/Select Threshold VTH (2) SET Reference Voltage VSET IOUT = 1mA 1mA ≤ IOUT ≤ 150mA, 2.5V ≤ VIN ≤ 5.5V (4) SET Input Leakage Current ISET 80 mV 1.225 1.250 1.275 V 1.206 1.294 20 VSET = 1.3V 55 0.015 2.500 nA 5.000 OVER TEMPERATURE PROTECTION High Trip Level Hysteresis THI 170 °C THYST 10 °C NOTE: (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. 3 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 Dual 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR SC1456 PRELIMINARY - June 15, 2000 BLOCK DIAGRAM PIN CONFIGURATION VOLTAGE OPTIONS Replace X in the part number (SC1456XIMS) by the letter shown below for the corresponding voltage option: Top View MSOP-10 X VOUTA (V) VOUTB (V) A 2.5 2.5 B 2.8 2.8 C 3.0 3.0 D 3.3 3.3 PIN DESCRIPTIONS Pin # Pin Name Description 1 EN1 Active high enable pin for device 1. Connect to VIN1 if not being used. 2 GND Ground pin. Can be used for heatsinking if needed. Electrically connected to pin 7. 3 SET1 Connecting this pin to ground results in the internally preset value for VOUT1. Connecting to an external resistor divider changes VOUT1 to: R1 VOUT 1 = 1 .250 • 1 + R2 4 OUT2 Regulator output for device 2, sourcing up to 150mA 5 IN2 Supply input pin for device 2. 6 EN2 Active high enable pin for device 2. Connect to VIN2 if not being used. 7 GND Ground pin. Can be used for heatsinking if needed. Electrically connected to pin 2. 8 SET2 Connecting this pin to ground results in the internally preset value for VOUT2. Connecting to an external resistor divider changes VOUT2 to: R1 VOUT 2 = 1 .250 • 1 + R2 9 OUT1 10 IN1 Regulator output for device 1, sourcing up to 150mA Supply input pin for device 1. 4 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 Dual 150mA ULTRA LOW DROPOUT, LOW NOISE REGULATOR SC1456 PRELIMINARY - June 15, 2000 DEVICE OUTLINE - MSOP-10 ECN 00-1167 5 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320