150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR PRELIMINARY - July 25, 2000 SC112 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION FEATURES The SC112 is a 150mA ultra low dropout linear regulator with a built in CMOS/TTL logic level enable, designed specifically for battery powered applications where low quiescent current and low dropout are critical for battery longevity. •= •= •= •= •= •= •= •= The SC112 uses a Semtech proprietary internal PNP device for the pass element, providing a low dropout voltage of 130mV at a load of 60mA. The output noise is reduced to 30µV (typical) by placing a very low leakage 10nF capacitor on pin 3 (noise bypass). Low dropout voltage CMOS/TTL compatible control switch Very low quiescent current 60µA (ON, no load) Internal thermal shutdown Short circuit protection Very low standby current 0.1µA maximum (OFF) Low noise with external bypass capacitor Industrial temperature range APPLICATIONS •= •= •= •= •= •= Each device contains a bandgap reference, error amplifier, PNP pass element, thermal and current limiting circuitry and resistor divider network for setting output voltage. The SC112 is packaged in a six lead SOT-23 surface mount package for a very small footprint and it requires only a 1µF capacitor on the output and a 0.01µF on the bypass pin for a minimum number of external components. Battery powered systems Cellular telephones Cordless telephones Pagers, personal digital assistants Portable instrumentation Low voltage systems ORDERING INFORMATION (1)(2) DEVICE PACKAGE SC112XXCSK.TR 6 pin SOT-23 Notes: (1) Where XX denotes voltage options. Available voltages are: 2.2V, 2.5V, 2.8V, 3.0V, 3.3V, 3.6V, 3.8V, 4.0V and 5.0V. Contact factory for additional voltage options. (2) Only available in tape and reel packaging. A reel contains 3000 devices TYPICAL APPLICATION CIRCUIT U1 SC112 EN 1 2 3 C1 10nF EN VIN GND GND BYP VO 6 VIN 5 4 VO C2 1uF C3 1uF 1 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR SC112 PRELIMINARY - July 25, 2000 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Maximum Units Input Supply Voltage VIN -0.3 to +16 V Enable Input Voltage VEN -0.3 to VIN V Power Dissipation PD Internally Limited W Thermal Resistance Junction to Ambient θJA 230 °C/W Operating Ambient Temperature Range TA -40 to +85 °C Operating Junction Temperature Range TA -40 to +125 °C Storage Temperature Range TSTG -55 to +150 °C Lead Temperature (Soldering) 10 sec. TLEAD 300 °C ESD Rating ESD 2 kV ELECTRICAL CHARACTERISTICS Unless specified, TA = 25°C, VIN = VO(NOM) + 1V, CIN = 1µF, CBYP = 10nF, CO = 1µF. Values in bold apply over full operating temperature range. Parameter Symbol Test Conditions MIN TYP MAX Units 14.5 V 75 µA VIN Supply Voltage Range VIN Ground Pin Current IGND 2.5 IO = 0mA 60 90 IO = 60mA 1.0 1.25 mA 1.5 IO = 100mA 2.1 2.5 3.0 IO = 150mA 4.2 4.75 5.25 VIN = 8V, Output OFF 0.1 µA +2.5 % VO Output Voltage VO IO = 30 mA -2.5 VO -3.0 Line Regulation REG(LINE) VIN = (VO(NOM) + 1V) to (VO(NOM) + 6V), +3.0 5 IO = 1mA Load Regulation Temperature Coefficient REG(LOAD) ∆VO/∆T 10 mV 20 IO = 1mA to 60mA 7.5 35 IO = 1mA to 100mA 20 65 IO = 1mA to 150mA 35 110 IO = 10mA 40 mV ppm/°C 2 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR SC112 PRELIMINARY - July 25, 2000 ELECTRICAL CHARACTERISTICS Unless specified, TA = 25°C, VIN = VO(NOM) + 1V, CIN = 1µF, CBYP = 10nF, CO = 1µF. Values in bold apply over full operating temperature range. Parameter Symbol Test Conditions MIN TYP 180 200 MAX Units VO (Cont.) Current Limit(1) ILIM Dropout Voltage VD IO = 60mA 130 mA 150 mV 180 IO = 100mA 165 195 225 IO = 150mA 200 245 275 Power Supply Rejection Ratio RR VRIPPLE = 100mV(rms), f = 400Hz, 60 dB 30 µV(rms) 1.250 V IO = 30mA Output Noise Voltage en 10 Hz ≤ f ≤ 80 kHz, IO = 60mA BYP Noise Bypass Terminal Voltage VBYP EN Enable Input Threshold Voltage Enable Input Bias Current VIH Output ON VIL Output OFF IEN VEN = 1.8V, Output ON V 1.8 0.5 6 10 µA NOTE: (1) As the load resistance further decreases, the SC112 folds back the output current to approximately 100mA at VO = 0V. 3 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR SC112 PRELIMINARY - July 25, 2000 BLOCK DIAGRAM PIN CONFIGURATION Top View SOT-23-6L APPLICATION HINTS (Refer to Sheet 1): (1) CIN (C3) is needed if the device is far from the supply’s filter capacitors, or for operation from a battery. A value of 1.0µF or greater should be used. CIN may be tantalum or ceramic. (2) CO (C2) should be a 1µF or greater tantalum or ceramic capacitor, with an Equivalent Series Resistance (ESR) between 10mΩ and 1Ω over temperature. Larger value capacitors will improve the overall transient response. (3) CBYP (C1 - required) should be placed as close as possible to pin 3 and ground. A 10nF ceramic capacitor is recommended. (4) EN may be tied to VIN if the shutdown feature is not required. Maximum EN voltage = VIN. (5) Connect both ground pins (2 and 5) to ground to maximize heat conduction. PIN DESCRIPTION Pin # Pin Name Description 1 EN 2 GND Ground pin. Use for heatsinking along with Pin #5. 3 BYP Noise bypass pin. Connect a 10nF capacitor (required) between this pin and GND. 4 VO Regulator output, supplying a guaranteed 150mA. 5 GND Ground pin. Use for heatsinking along with Pin #2. 6 VIN Power input pin. Active high enable pin. Connect to VIN if not being used. 4 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR SC112 PRELIMINARY - July 25, 2000 DEVICE OUTLINE - SOT23-6L MINIMUM LAND PATTERN - SOT23-6L ECN00-1203 5 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320