SC1563ISK-3.1

VERY LOW DROPOUT, LOW QUIESCENT 500mA REGULATOR PRELIMINARY - September 11, 2000 SC1563 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC1563 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 500 milliamps. Since it has superior dropout characteristics compared to regular LDOs, it can be used to supply 2.5V on motherboards or 2.8V on peripheral cards from the 3.3V supply with no heatsink. Additionally, the SC1563 has a shutdown pin, to further reduce power dissipation while shut down. The SC1563 provides excellent regulation over variations in line, load and temperature. The SC1563 is available as a five terminal fixed or adjustable output voltage device with enable. The device is available in a 5-pin SOT-23 package and an 8-pin MSOP package for higher power dissipation/ lower junction temperature. FEATURES •= 450mV dropout @ 500mA •= Designed to operate with ceramic capacitors •= Adjustable output from 1.200V to 3.3V •= Multiple output voltage options (all parts also •= •= •= •= •= adjustable externally using resistors) Over current and over temperature protection Enable pin 1µA quiescent current in shutdown Low reverse leakage (output to input) Full industrial temperature range APPLICATIONS •= Battery powered systems •= Motherboards •= Peripheral cards •= PCMCIA cards ORDERING INFORMATION DEVICE (1)(2)(3) PACKAGE SOT-23-5L MSOP-8 SC1563ISK-X.XTR SC1563IMS-X.XTR TYPICAL APPLICATION Internally Preset Output Voltage U1 5 VIN 1 SHDN C1 VIN SHDN GND 2 3 SC1563ISK-X.X VO 4 VO (X.XV) Notes: (1) Where -X.X denotes voltage options. Available voltages are: 1.8V, 2.5V, 2.8V, 3.0V, 3.1V and 3.3V. (2) Output voltage can be adjusted using external resistors, see Pin Description. (3) Only available in tape and reel packaging. A reel contains 2500 devices (MSOP-8) or 3000 devices (SOT-23-5L). Externally Set Output Voltage U1 5 VIN 1 SHDN C2 C1 VIN SHDN GND 2 SC1563ISK-X.X VO 4 R1 VO ADJ ADJ 3 C2 R2 VO = 1.200 (R1 + R2) R2 Volts 1 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 VERY LOW DROPOUT, LOW QUIESCENT 500mA REGULATOR PRELIMINARY - September 11, 2000 SC1563 ABSOLUTE MAXIMUM RATINGS Parameter Input Voltage Power Dissipation Thermal Resistance Junction to Ambient MSOP-8(1) MSOP-8(2) SOT-23-5L(1) Thermal Resistance Junction to Case MSOP-8 SOT-23-5L Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Sec. ESD Rating Symbol VIN PD θJA Maximum 5.5 Internally Limited 206 95 256 39 81 -40 to+85 -40 to 150 -65 to 150 300 2 Units V W °C/W θJC TA °C/W °C °C °C °C kV TJ TSTG TLEAD ESD Notes: (1) Minimum pad size. (2) 1 square inch of FR-4, double sided, 1oz. minimum copper weight. ELECTRICAL CHARACTERISTICS Unless specified: VSHDN = 0V Adjustable Option (VADJ > VTH(ADJ)): VIN = 2.2 to 5.5V and IO = 10µA to 500mA Fixed Options (VADJ = GND): VIN = (VO + 0.7V) to 5.5V and IO = 0A to 500mA Values in bold apply over the full operating temperature range. Parameter VIN Supply Voltage Range Quiescent Current Symbol Test Conditions Min Typ Max Units VIN IQ VIN = 3.3V VIN = 5.5V, VSHDN = Open 2.2 100 0.5 5.5 150 2 V µA µA VO Output Voltage(1) (Internal Fixed Voltage) Line Regulation (1) (1) VO VIN = VO + 0.7V, IO = 10mA 0.99VO 0.98VO VO VO 0.035 0.2 1.01VO 1.02VO 0.3 0.4 V REG(LINE) REG(LOAD) VIN = (VO + 0.25V) to 5.5V, IOUT = 10mA VIN = VO + 0.7V % % Load Regulation 2 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 VERY LOW DROPOUT, LOW QUIESCENT 500mA REGULATOR PRELIMINARY - September 11, 2000 SC1563 ELECTRICAL CHARACTERISTICS (Cont.) Unless specified: VSHDN = 0V Adjustable Option (VADJ > VTH(ADJ)): VIN = 2.2 to 5.5V and IO = 10µA to 500mA Fixed Options (VADJ = GND): VIN = (VO + 0.7V) to 5.5V and IO = 0A to 500mA Values in bold apply over the full operating temperature range. Parameter VO (Cont.) Dropout Voltage(2) Symbol Test Conditions Min Typ Max Units VD ILOAD = 2mA ILOAD = 100mA ILOAD = 250mA ILOAD = 500mA 1 5 10 mV 75 100 150 mV 200 300 400 mV 450 550 700 mV Minimum Load Current Current Limit ADJ Reference Voltage(1) (3) IO ICL VREF VIN = VO + 0.7V 0.50 1 10 1.00 µA A VIN = 2.2V, VADJ = VOUT, IO = 10mA 1.188 1.176 1.200 1.212 1.224 V Adjust Pin Current (4) IADJ VTH(ADJ) VADJ = VREF 0.10 50 0.20 100 0.40 nA V Adjust Pin Threshold(5) SHDN Shutdown Pin Current Shutdown Pin Threshold ISHDN VIH VIL VSHDN = 0V, VIN = 3.3V VIN = 3.3V VIN = 3.3V 1.8 1 10 µA V 0.4 OVER TEMPERATURE PROTECTION High Trip Level Hysteresis THI THYST 165 10 °C °C NOTES: (1) Low duty cycle pulse testing with Kelvin connections required. (2) Defined as the input to output differential at which the output voltage drops to 1% below the value measured at a differential of 0.7V. (3) Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this requirement. Adjustable versions only. (4) Guaranteed by design. (5) When VADJ exceeds this threshold, the “Sense Select” switch disconnects the internal feedback chain from the error amplifier and connects VADJ instead. 3 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 VERY LOW DROPOUT, LOW QUIESCENT 500mA REGULATOR PRELIMINARY - September 11, 2000 SC1563 BLOCK DIAGRAM PIN CONFIGURATIONS Top View Top View SOT-23-5L MSOP-8 PIN DESCRIPTION Pin Name ADJ Pin Number SOT-23-5L MSOP-8 3 3 This pin, when grounded, sets the output voltage to that set by the internal feedback resistors. If external feedback resistors are used, the output voltage will be (See Application Circuit): Pin Function VO GND VIN VO SHDN 2 5 4 1 5-8 1 4 2 = 1.200 (R1+ R2) R2 Volts Reference ground. Connect all MSOP-8 GND pins. These pins may be used for heatsinking purposes. Input voltage. For regulation at full load, the input to this pin must be between (VO + 0.7V) to 5.5V. Minimum VIN = 2.2V. This pin is the power output of this device. Shutdown Input. Leaving this pin open turns the regulator off, reducing the quiescent current to a fraction of its operating value (typically