AIC1730 Low Noise Low Dropout, 150mA Linear Regulator n FEATURES n DESCRIPTION l Available in ±2% Output Tolerance. The AIC1730 is a low noise, low dropout linear l 1.8V to 3.3V Output Voltage with 0.1V Increment. regulator, housed in a small SOT-23-5 & SOT-23- l Active Low Shutdown Control. l Very Low Quiescent Current. l Very Low Dropout Voltage. when the SHDN pin is set to a logic high level. l Miniature Package (SOT-23-5 & SOT-23-6W) An internal P-MOSFET pass transistor is used to l Short Circuit and Thermal Protection. achieve a low dropout voltage of 90mV at 50mA l Very Low Noise. load current. It offers high precision output voltage 6W package. The device is in the “ON” state n APPLICATIONS of ±2%. The very low quiescent current and low dropout voltage make this device ideal for battery l Cellular Telephones. l Pagers. l Personal Communication Equipment. l Cordless Telephones. reverse voltage protection diode. The high ripple l Portable Instrumentation. rejection l Portable Consumer Equipment. performance for critical applications. An external l Radio Control Systems. l Low Voltage Systems. l Battery Powered Systems. powered applications. The internal reverse bias protection eliminates the requirement for a and low noise provide enhanced capacitor can be connected to the noise bypass pin to reduce the output noise level. n TYPICAL APPLICATION CIRCUIT VIN VIN VOUT + CIN 1µF COUT 1µF GND SHDN V VOUT + BP CBP SHDN AIC1730 0.1µF Low Noise Low Dropout Linear Regulator Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC DS-1730-00 TEL: 886-3-5772500 May 22, 01 FAX: 886-3-5772510 www.analog.com.tw 1 AIC1730 n ORDERING INFORMATION AIC1730-XCX ORDER NUMBER PIN CONFIGURATION FRONT VIEW PACKAGE TYPE V: SOT-23-5 Q: SOT-23-6W OUTPUT VOLTAGE 18: 1.8V . . . 285: 2.85V . . . 33: 3.3V AIC1730-18CV : : : AIC1730-33CV (SOT-23-5) AIC1730-18CQ : : : AIC1730-33CQ (SOT-23-6W ) VOUT BP 5 4 1 2 3 VIN GND SHDN FRONT VIEW VIN GND VOUT 6 5 1 2 SHDN GND 4 3 BP The output voltage is available by 0.1V per step. n ABSOLUTE MAXIMUM RATINGS Supply Voltage Power Dissipation .................… … … … … … … … … … … … ..… … … … … … … ....................12V .............… … … … … … … … … … … … … … … .… … … … … .............500mW Operating Temperature Range .… … … … … … … … … … … … … … … … … … … .....-40ºC~85ºC Storage Temperature Range ................… … … … … … … … … … … … … … .........-65ºC~150ºC Shutdown Terminal Voltage ..… … … … … … … … … … … … … … … … … … … … … ..............12V Noise Bypass Terminal Voltage .… … … … … … … … … … … .… … … … … … … … … ..............5V 2 AIC1730 n ELECTRICAL CHARACTERISTICS (CIN=1µF , COUT=10µF, TJ=25°C, unless otherwise specified) PARAMETER TEST CONDITIONS SYMBOL Quiescent Current IOUT = 0mA, VIN = 3.6~12V IQ Standby Current VIN = 3.6~8V , output OFF ISTBY GND Pin Current IOUT = 0.1~150mA IGND Continuous Output Current VIN = VOUT + 1V IOUT Output Current Limit VIN = VOUT + 1V , VOUT = 0V Output Voltage Tolerance VIN = VOUT + 1V , no load Temperature Coefficient Line Regulation VIN = VOUT（TYP） + 1V to MIN. TYP. MAX. UNIT 55 80 µA 0.1 µA 80 µA 150 mA 55 IIL 150 VOUT -2 220 mA 2 % TC 50 150 ppm/ºC ∆VLIR 2 7 mV ∆VLOR 7 25 mV 90 160 mV 140 230 mV 200 350 mV 700 mV VOUT（TYP） + 6V Load Regulation VIN = 5V , IOUT = 0.1~150mA Dropout Voltage (1) IOUT = 50 mA VOUT≥2.5V VDROP1 IOUT = 100 mA IOUT = 150 mA Dropout Voltage (2) IOUT=150 mA VOUT <2.5V Noise Bypass Terminal Voltage Output Noise CBP = 0.1µF , f = 1KHz VDROP2 VREF 1.23 V ?n 0.46 µV Hz VIN = 5V SHUTDOWN TERMINAL SPECIFICATIONS Shutdown Pin Current I SHDN Shutdown Pin Voltage (ON) Output ON V SHDN （ON） Shutdown Pin Voltage (OFF) Output OFF V SHDN （OFF） Shutdown Exit Delay Time CBP = 0.1µF , COUT = 1µF, IOUT=30mA 0.1 1.6 µA V 0.6 V △t 300 µS TSD 155 ºC THERMAL PROTECTION Thermal Shutdown Temperature 3 AIC1730 n TYPICAL PERFORMANCE CHARACTERISTICS LINE TRANSIENT RESPONSE LINE TRANSIENT RESPONSE IOUT=1mA,CBP=0.1µ F IOUT=1mA,CBP =0.1 µ F COUT=10µ F COUT =1µF VOUT V OUT 50mV/DIV 50mV/DIV VOUT+3V VOUT+3V VOUT+1V VOUT+1V VIN VIN 2V/DIV 2V/DIV TIME (100 µS/DIV) TIME (100µ S/DIV) LINE TRANSIENT RESPONSE LINE TRANSIENT RESPONSE IOUT =1mA,CBP =1µF IOUT =1mA,CBP =1µF COUT =1 µ F COUT=10µ F V OUT VOUT 50mV/DIV 50mV/DIV VOUT+3V V OUT +1V VOUT +3V V IN VOUT+1V VIN 2V/DIV 2V/DIV TIME (100 µS/DIV) TIME (100 µS/DIV) SHUTDOWN EXIT DELAY SHUTDOWN EXIT DELAY IOUT=30mA,CBP =0.01µ F V OUT IOUT =30mA,CBP =0.1 µF V OUT C OUT =3.3 µF 2V/DIV COUT=3.3µF 2V/DIV TIME (250 µS/DIV) V SHDN VSHDN 2V/DIV 2V/DIV TIME (250µ S/DIV) 4 AIC1730 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) SHUTDOWN EXIT DELAY SHUTDOWN EXIT DELAY IOUT =10mA,CBP =0.1 µF IOUT =10mA,CBP =0.1µF VOUT COUT=1 µF 2V/DIV 2V/DIV VSHDN V SHDN 2V/DIV 2V/DIV COUT=10 µF TIME (250µ S/DIV) V OUT TIME (250 µS/DIV) LOAD TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE CBP =0.1µF CBP =0.1µF COUT =1µ F COUT =10µ F VOUT VOUT 20mV/DIV 20mV/DIV IOUT=60mA IOUT=60mA IOUT =0mA IOUT=0mA I OUT I OUT TIME (1mS/DIV) TIME (1mS/DIV) LOAD TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE CBP =0.1 µ F CBP =0.1µ F COUT=1 µF COUT =10 µF VOUT VOUT 20mV/DIV 20mV/DIV IOUT =90mA IOUT=90mA I OUT=0mA IOUT=0mA I OUT TIME (1mS/DIV) I OUT TIME (1mS/DIV) 5 AIC1730 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Ground Current vs. Input Voltage (V OUT=3.0V) Dropout Voltage vs. Output Current 250 70 I OUT=50mA 60 VOUT=3.0V 200 I OUT =0mA I GND (uA) V DROP (mV) 50 150 100 40 30 20 50 10 0 0 50 100 0 150 0 1 2 3 4 5 6 V IN (V) I OUT (mA) Ground Current vs. Temperature Quiescent Current (ON Mode) vs. Input Voltage 70 80 I OUT=90mA 68 70 66 60 64 I Q(µA) I GND (mA) I OUT =0mA 50 40 IO UT=60mA 62 60 IOUT=30mA 58 30 56 20 54 10 0 0 52 2 4 6 8 10 12 14 50 -40 16 -20 0 20 Shutdown Voltage vs. Temperature 60 80 100 120 140 160 Short Circuit Current vs. Input Voltage 2.0 400 1.5 300 I OUT (mA) Output ON VSHDN (V) 40 TA(°C) VIN (V) 1.0 200 VOUT is connected to GND 0.5 100 Output OFF 0.0 -40 0 0 40 TA(°C) 80 120 0 2 4 6 8 VIN (V) 6 AIC1730 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Ground Current vs. Output Current 70 I GND (µ A) 65 60 55 0 50 100 150 I OUT (mA) n BLOCK DIAGRAM VIN Current Limiting BP 1.23V REF SHDN Power Shutdown + Error Amp. VOUT Thermal Shutdown GND 7 AIC1730 n PIN DESCRIPTIONS SOT-23-5 PIN 1 : VIN SOT-23-6W - PIN 2 : GND - Power supply input pin. Bypass PIN 1 : SHDN - Active-Low shutdown input pin. with a 1µF capacitor to GND PIN 2 : GND Ground functions pin. as This a pin also Ground functions pin. as This a pin heatsink. also To To maximize power dissipation, use maximize power dissipation, use of a large pad or the circuit- of a large pad or the circuit- board board recommended. ground heatsink. - plane is recommended. PIN 3 : BP ground plane is - Noise bypass pin. An external PIN 3 : SHDN - Active-Low shutdown input pin. bypass capacitor connected to PIN 4 : BP the BP pin reduces noises at the - Noise bypass pin. An external output. bypass capacitor connected to the BP pin reduces noises at the PIN 4 : VOUT - Output pin. Sources up to 150 output. PIN 5 : VOUT - Output pin. Sources up to 150 mA. PIN 5 : GND - mA. Ground functions pin. as This a pin heatsink. also To maximize power dissipation, use of a large pad or the circuitboard ground plane is recommended. PIN 6 : VIN - Power supply input pin. Bypass with a 1µF capacitor to GND n DETAILED DESCRIPTION OF TECHNICAL TERMS fall as the input voltage is reduced. It depends on the OUTPUT VOLTAGE (VOUT) The AIC1730 provides factory-set output voltages from 1.8V to 3.3V, in 100mV increments. The output voltage is specified with VIN = VOUT (TYP) + 1V and IOUT = 0mA DROPOUT VOLTAGE (VDROP) The dropout voltage is defined as the difference between the input voltage and output voltage at load current and junction temperature. The dropout voltage is specified at which the output voltage drops 100mV below the value measured with a 1V difference. CONTINUOUS OUTPUT CURRENT (IOUT) Normal rated output current. This is limited by package power dissipation. which point the regulator starts to fall out of regulation. Below this value, the output voltage will 8 AIC1730 LINE REGULATION THERMAL PROTECTION Line regulation is the ability of the regulator to The thermal sensor protects the device when the maintain a constant output voltage as the input junction temperature exceeds TJ = +155ºC. It signals voltage changes. The line regulation is specified as the shutdown logic, turning off the pass transistor the input voltage is changed from VIN = VOUT + 1 V to and allowing the IC to cool. After the IC’s junction VIN = VOUT + 6 V and IOUT = 1mA. temperature cools by 15ºC, the thermal sensor will turn on the pass transistor again. Thermal protection LOAD REGULATION Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. To minimize temperature effects, it is a pulsed measurement with the input voltage set to is designed to protect the device in the event of fault conditions. For continuous operation do not exceed the absolute maximum junction-temperature rating of TJ = 150ºC, or damage may occur to the device. VIN = VOUT + 1 V. The load regulation is specified under the output current step of 0.1mA to 150mA. n APPLICATION INFORMATION QUIESCENT CURRENT (IQ) INPUT-OUTPUT CAPACITORS The quiescent current is the current flowing through Linear regulators require input and output the ground pin under no load. capacitors to maintain stability. The recommended minimum value of input capacitor is 0.22µF. The output capacitor should be GROUND CURRENT (IGND) selected within the Equivalent Series Resistance Ground current is the current flowing through the ground pin under loading. (ESR) range shown in the graphs below for stability. Because the ceramic capacitor’s ESR is lower and its electrical STANDBY CURRENT (ISTBY) (capacitance and Standby current is the current flowing into the temperature, a tantalum output capacitor is regulator when the output is shutdown by setting recommended, especially for heavier load. In V SHDN = 0V, VIN = 8 V. general, the capacitor should be at least ESR) vary characteristics widely over 1µF(tantalum) and be rated for the actual ambient operating temperature range. CURRENT LIMIT (IIL ) The AIC1730 include a current Note: It is very important to check the selected limiter, which monitors and controls the maximum output current to manufactures’ electrical characteristics (capacitance and ESR) over temperature. be 300mA typically if the output is shorted to ground. This can protect the device from being damaged. 9 AIC1730 PMAX = (TJ -TA)/(θJB + θBA) NOISE BYPASS CAPACITOR Use a 0.1µF bypass capacitor at BP for low where TJ -TA output voltage noise. Increasing the capacitance values performance above 1µF advantage and provide no are not the temperature difference between the die junction and the surrounding air, such as 1µF will decrease the output noise, however, is θJB is the thermal resistance of the package, and θBA is the thermal resistance through the PCB, copper traces, and other materials to the recommended. surrounding air. As a general rule, the lower the temperature is, POWER DISSIPATION the better the reliability of the device is. So the The maximum power dissipation of AIC1730 PCB mounting pad should provide maximum depends on the thermal resistance of the case thermal conductivity to maintain low device and circuit board, the temperature difference temperature. between the die junction and ambient air, and The GND pin performs the dual function of the rate of air flow. The rate of temperature rise is providing an electrical connection to ground and greatly pad channeling heat away. Therefore, connecting the configuration on the PCB, the board material, GND pin to ground with a large pad or ground and the ambient temperature. When the IC plane would increase the power dissipation and mounting with good thermal conductivity is used, reduce the device temperature. affected by the mounting the junction will be low even if the power dissipation is great. The power dissipation across the device is P = IOUT (V IN -V OUT). The maximum power dissipation is: 100 100 COUT=2.2µ F COUT=1µF 10 ESR(Ω) ESR(Ω) 10 1 STABLE REGION 0.1 1 STABLE REGION 0.1 0.01 0.01 50 100 I OUT(mA) 150 50 100 150 IOUT (mA) 10 AIC1730 100 100 COUT=10µ F COUT =3.3 µF 10 ESR(Ω) ESR(Ω ) 10 1 1 STABLE REGION STABLE REGION 0.1 0.1 0.01 50 100 150 0.01 50 100 I 150 IOUT (mA) (mA) n PACKAGE DIMENSIONS l SOT-23-5 (unit: mm) C D L H E θ1 e A A2 MIN MAX A 1.00 1.30 A1 — 0.10 A2 0.70 0.90 b 0.35 0.50 C 0.10 0.25 D 2.70 3.10 E 1.40 1.80 e A1 b l SYMBOL 1.90 (TYP) H 2.60 3.00 L 0.37 — θ1 1° 9° SOT-23-5 Marking Part No. AIC1730-18CV AIC1730-19CV AIC1730-20CV AIC1730-21CV AIC1730-22CV AIC1730-23CV AIC1730-24CV AIC1730-25CV AIC1730-26CV Marking EC18 EC19 EC20 EC21 EC22 EC23 EC24 EC25 EC26 Part No. AIC1730-27CV AIC1730-28CV AIC1730-285CV AIC1730-29CV AIC1730-30CV AIC1730-31CV AIC1730-32CV AIC1730-33CV Marking EC27 EC28 EC2J EC29 EC30 EC31 EC32 EC33 11 AIC1730 l SOT-23-6W (unit: mm) C D L H E θ1 e A A2 MIN MAX A 1.00 1.30 A1 — 0.10 A2 0.70 0.90 b 0.35 0.50 C 0.10 0.25 D 2.70 3.10 E 1.60 2.00 e A1 b l SYMBOL 1.90 (TYP) H 2.60 3.00 L 0.37 — θ1 1° 9° SOT-23-6W Marking Part No. AIC1730-18CQ AIC1730-19CQ AIC1730-20CQ AIC1730-21CQ AIC1730-22CQ AIC1730-23CQ AIC1730-24CQ AIC1730-25CQ AIC1730-26CQ Marking EB18 EB19 EB20 EB21 EB22 EB23 EB24 EB25 EB26 Part No. AIC1730-27CQ AIC1730-28CQ AIC1730-285CQ AIC1730-29CQ AIC1730-30CQ AIC1730-31CQ AIC1730-32CQ AIC1730-33CQ Marking EB27 EB28 EB2J EB29 EB30 EB31 EB32 EB33 12