AIC1731 300mA, Low Dropout Linear Regulator with Shutdown FEATURES z z z z z z z DESCRIPTION Active Low Shutdown Control. Very Low Quiescent Current. Very Low Dropout Voltage of 470mV at 300mA Output Current (3.0V Output Version) 1.3V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V Output Voltage. Short Circuit and Thermal Protection. ±2% Output Tolerance. Miniature Package: SOT-23-5 and SOT-89-5 AIC1731 is a 300mA low noise, low dropout linear regulator, and is housed in small SOT-23-5 and SOT-89-5 package. The device is in the “ON” state when the SHDN pin is set to logic high level. An internal P-MOSFET pass transistor is used to achieve 470mV low dropout voltage at 300mA load current. It offers high precision output voltage of ±2%. The quality of low APPLICATIONS z z z z z z z z z quiescent current and low dropout voltage makes this device ideal for battery power applications. PDA DSC Notebook Pagers Personal Communication Equipment Cordless Telephones Portable Instrumentation Portable Consumer Equipment Battery Powered Systems The internal reverse bias protection eliminates the requirement for a reverse voltage protection diode. The high ripple rejection and low noise of AIC1731 provide enhanced performance for critical applications. The noise bypass pin can be connected an external capacitor to reduce the output noise level. TYPICAL APPLICATION CIRCUIT VIN VIN CIN VOUT + + 1μF GND COUT 1μF (Note1) BP SHDN SHDN VOUT CBP AIC1731 0.1μF Low Noise Low Dropout Linear Regulator Analog Integrations Corporation Si-Soft Research Center DS-1731G-02 20090928 3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw 1 AIC1731 ORDERING INFORMATION AIC1731-XXXXXX PIN CONFIGURATION PACKING TYPE TR: TAPE & REEL BG: BAG PACKAGE TYPE V: SOT-23-5 X5: SOT-89-5 P: LEAD FREE COMMERCIAL G: GREEN PACKAGE OUTPUT VOLTAGE 13: 1.3V 15: 1.5V 18: 1.8V 25: 2.5V 28: 2.8V 30: 3.0V 33: 3.3V SOT-23-5 TOP VIEW 1: VIN 2: GND 3: SHDN 4: BP 5: VOUT SOT-89-5 TOP VIEW 1: VIN 2: GND 3: SHDN 4: BP 5: VOUT 5 1 4 2 5 1 3 4 2 3 (Of a unit of 0.1V within the voltage range from 1.3V to 3.3V, additional voltage versions for this product line may be available on demand with prior consultation with AIC.) Example: AIC1731-18PX5TR Æ 1.8V Version, in SOT-89-5 Lead Free Package & Tape & Reel Packing Type AIC1731-18PVTR Æ 1.8V Version, in SOT-23-5 Lead Free Package & Tape & Reel Packing Type • SOT-89-5 Marking Part No. AIC1731-13CX5 AIC1731-15CX5 AIC1731-18CX5 AIC1731-25CX5 AIC1731-28CX5 AIC1731-30CX5 AIC1731-33CX5 Marking EH13 EH15 EH18 EH25 EH28 EH30 EH33 Part No. AIC1731-13PX5 AIC1731-15PX5 AIC1731-18PX5 AIC1731-25PX5 AIC1731-28PX5 AIC1731-30PX5 AIC1731-33PX5 Marking EH13P EH15P EH18P EH25P EH28P EH30P EH33P Part No. AIC1731-13GX5 AIC1731-15GX5 AIC1731-18GX5 AIC1731-25GX5 AIC1731-28GX5 AIC1731-30GX5 AIC1731-33GX5 Marking EH13G EH15G EH18G EH25G EH28G EH30G EH33G Part No. AIC1731-13CV AIC1731-15CV AIC1731-18CV AIC1731-25CV AIC1731-28CV AIC1731-30CV AIC1731-33CV Marking ED13 ED15 ED18 ED25 ED28 ED30 ED33 Part No. AIC1731-13PV AIC1731-15PV AIC1731-18PV AIC1731-25PV AIC1731-28PV AIC1731-30PV AIC1731-33PV Marking ED13P ED15P ED18P ED25P ED28P ED30P ED33P Part No. AIC1731-13GV AIC1731-15GV AIC1731-18GV AIC1731-25GV AIC1731-28GV AIC1731-30GV AIC1731-33GV Marking ED13G ED15G ED18G ED25G ED28G ED30G ED33G • SOT-23-5 Marking 2 AIC1731 ABSOLUTE MAXIMUM RATINGS Supply Voltage 12V Shutdown Terminal Voltage 8V Noise Bypass Terminal Voltage 5V Operating Temperature Range -40ºC~85ºC Maximum Junction Temperature 125°C Storage Temperature Range -65ºC~150ºC Lead Temperature (Soldering, 10 sec) Thermal Resistance Junction to Case, RθJC 260°C SOT-23-5 130°C /W SOT-89-5 30°C /W Thermal Resistance Junction to Ambient, RθJA SOT-23-5 220°C /W SOT-89-5 160°C /W (Assume no ambient airflow, no heatsink) Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT 3 AIC1731 ELECTRICAL CHARACTERISTICS (CIN=1μF, COUT=4.7μF, TJ=25°C, unless otherwise specified) (Note2) PARAMETER TEST CONDITIONS SYMBOL MIN. Quiescent Current IOUT = 0mA, VIN = 3.6~7V IQ Standby Current VIN = 3.6~7V, output OFF ISTBY GND Pin Current IOUT = 0.1~300mA IGND Continuous Output Current VIN = 5V IOUT Output Current Limit VIN = 5V, VOUT = 0V Output Voltage Tolerance VIN = 5V, no load Temperature Coefficient TYP. MAX. UNIT 35 50 μA 0.1 μA 50 μA 300 mA 30 IIL 300 VOUT -2 450 mA 2 % TC 50 150 ppm/ºC Line Regulation VIN = VOUT(TYP) + 1V to 7V ΔVLIR 3 10 mV Load Regulation VIN = VOUT + 1.2V (Vout≥ 2.0V) VIN = VOUT + 1.7V (Vout≤ 1.9V) IOUT = 0.1~300mA ΔVLOR 10 30 mV VDROP 470 570 800 1260 870 970 1200 1660 mV VREF 1.23 Δn 0.46 RR 55 Dropout Voltage IL=300mA 3.0V≤VOUT≤3.3V 2.5V≤VOUT≤2.9V 2.0V≤VOUT≤2.4V 1.3V≤VOUT≤1.9V Noise Bypass Terminal Voltage Output Noise Ripple Rejection CBP = 0.1μF, f = 1KHz,VIN = 5V f = 1KHz, Ripple = 0.5VP-P, V μV Hz dB CBP = 0.1μF Shutdown Pin Current I SHDN Shutdown Pin Voltage (ON) Output ON Shutdown Pin Voltage (OFF) Output OFF Shutdown Exit Delay Time Thermal Shutdown Temperature CBP=0.1μF, COUT=1μF, IOUT=30mA 0.1 1.6 μA V 0.6 V Δt 300 μS TSD 155 ºC Note 1: To avoid output oscillation, aluminum electrolytic output capacitor is recommended and ceramic capacitor is not suggested. Note 2: Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). 4 AIC1731 TYPICAL PERFORMANCE CHARACTERISTICS 700 AIC1731-33 1.5V 50 600 3.3V 40 500 VDROP (mV) Quiescent Current (μA) 60 30 20 TA=80°C TA=50°C 400 300 200 10 TA=20°C 100 TA=-40°C 0 0 1 2 3 4 5 6 0 7 0 50 VIN (V) Fig. 1 Quiescent Current vs. VIN 100 150 200 250 300 ILOAD (mA) Fig. 2 VDROP vs. ILOAD 44.0 800 Short Circuit Current (mA) 43.5 Ground Current (μA) 43.0 42.5 3.3V 42.0 1.5V 41.5 41.0 40.5 40.0 VIN=6V TA=25°C 39.5 39.0 0 50 100 150 200 250 700 600 500 400 3.3V 300 1.5V 200 100 0 300 0 1 2 3 5 6 Input Voltage (V) Fig. 3 Ground Current vs. ILOAD Fig. 4 Input Voltage vs. Short Circuit Current 7 46 45 AIC1731-33 Quiescent Current (μA) 44 Ground Current (μA) 4 ILOAD (mA) 300mA 43 150mA 42 41 30mA 40 1.5V 44 3.3V 42 40 38 VIN=5V 36 39 -40 -20 0 20 40 60 80 Temperature (°C) Fig. 5 Ground Current vs. Temperature 100 -40 -20 0 20 40 60 80 100 Temperature (°C) Fig. 6 Quiescent Current vs Temperature 5 AIC1731 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 3.50 640 AIC1731-33 3.45 620 Current Limit (mA) Output Voltage (V) 3.40 3.35 3.30 3.25 3.20 600 580 560 540 520 3.15 3.10 -20 0 20 40 60 80 480 -40 100 Temperature (°C) Fig. 7 Output Voltage vs. Temperature -20 0 20 40 60 80 100 Temperature (°C) Fig. 8 Current Limit vs. Temperature 1.30 500 AIC1731-15 450 1.25 o AIC1731-25 TA=85 C o TA=50 C 400 VDROP (mV) 350 1.20 o TA=-40 C VDROP (V) VIN=5V 500 VIN=5V -40 VIN=7V VIN=6V 1.15 TA=20 o 1.10 TA=50oC o TA=-40 C 250 o TA=20 C 200 150 o 1.05 300 TA=85 C 100 50 1.00 0 0 50 100 150 200 250 300 0 50 100 IOUT(mA) Fig. 9 150 200 VDROP vs. ILOAD Fig. 10 300 VDROP vs. ILOAD CBP=0.1μF CBP=0.1μF COUT=4.7μF VOUT 250 IOUT(mA) IOUT=180mA IOUT=120mA Fig. 11 Load Transient Response COUT=1μF VOUT IOUT=180mA IOUT=120mA Fig. 12 Load Transient Response 6 AIC1731 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Vin=VOUT+2V Vin=VOUT+2V Vin=VOUT+1V Vin=VOUT+1 VOUT=3.3V CIN=1μF, COUT=1μF VOUT=3.3V CBP=0.1μF Iout=50mA Iout=50mA Fig. 13 Line Transient Response Fig. 14 Line Transient Response VIN=Vout+2V VIN=Vout+2V Vin=Vout+1V VOUT=1.5V CIN=1μF, COUT=4.7μF CBP=0.1μF VIN=Vout+1V CIN=1μF, COUT=1μF CIN=1μF, COUT=4.7μF VOUT=1.5V CBP=0.1μF CBP=0.1μF Iout=50mA Iout=50mA Fig. 15 Line Transient Response Fig. 16 Line Transient Response 0 IOUT=30mA CBP=0.1μF -10 VOUT -20 VSHDN PSRR(dB) COUT=1μF COUT=1uF ; CBP=0.1uF IL=300mA IL=100mA -30 -40 IL=100mA -50 IL=30mA -60 10 Fig. 17 Shutdown Exit Time 100 1000 10000 100000 1000000 1E7 Frequency(Hz) Fig. 18 Ripple Rejection 7 AIC1731 BLOCK DIAGRAM VIN Current Limiting BP VREF 1.23V SHDN Power Shutdown - Error Amp. + VOUT Thermal Limiting GND PIN DESCRIPTIONS PIN 1 : VIN - Power supply input pin. Bypass with a 1μF capacitor to GND PIN 2 : GND - Ground pin. PIN 3 : SHDN - Active-Low shutdown input pin. PIN 4 : BP - Noise bypass pin. An external bypass capacitor connected to BP pin reduces noises at the output. PIN 5 : VOUT - Output pin. Sources up to 300 mA. 8 AIC1731 DETAILED DESCRIPTIONS OF TECHNICAL TERMS DROPOUT VOLTAGE (VDROP) The dropout voltage is defined as the difference between the input voltage and output voltage at which the output voltage drops 100mV. Below this value, the output voltage will fall as the input voltage reduces. It depends on the load current and junction temperature. LINE REGULATION Line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage changes. The line regulation is specified as the input voltage changes from VIN = VOUT + 1V to VIN = 7V and IOUT = 1mA. LOAD REGULATION Load regulation is the ability of the regulator to maintain a constant output voltage as the load current changes. A pulsed measurement with an input voltage set to VIN = VOUT + VDROP can minimize temperature effects. The load regulation is specified by the output current ranging from 0.1mA to 300mA. CURRENT LIMIT (IIL) AIC1731 includes a current limiting, which monitors and controls the maximum output current if the output is shorted to ground. This can protect the device from being damaged. THERMAL PROTECTION Thermal sensor protects device when the junction temperature exceeds TJ= +155ºC. It signals shutdown logic, turning off pass transistor and allowing IC to cool down. After the IC’s junction temperature cools by 15ºC, the thermal sensor will turn the pass transistor back on. Thermal protection is designed to protect the device in the event of fault conditions. For a continuous operation, do not exceed the absolute maximum junction-temperature rating of TJ= 150ºC, or damage may occur to the device. APPLICATION INFORMATION INPUT-OUTPUT CAPACITORS Linear regulators require input and output capacitors to maintain stability. Input capacitor at 1μF with a 1uF aluminum electrolytic output capacitor is suggested. NOISE BYPASS CAPACITOR 0.1μF bypass capacitor at BP pin reduces output voltage noise. And the BP pin has to connect a capacitor to GND. POWER DISSIPATION The AIC1731 obtains thermal-limiting circuitry, which is designed to protect the device against overload condition. For continuous load condition, maximum rating of junction temperature must not be exceeded. It is important to pay more attention in thermal resistance. It includes junction to case, junction to ambient. The maximum power dissipation of AIC1731 depends on the thermal resistance of its case and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. The rate of temperature rise is greatly affected by the mounting pad configuration on the PCB, the board material, and the ambient temperature. When the IC mounting with good thermal conductivity is used, the junction temperature will be low even when large power dissipation applies. The power dissipation across the device is P = IOUT (VIN-VOUT). 9 AIC1731 The maximum power dissipation is: PMAX = (TJ-max - TA ) Rθ JA Where TJ-max is the maximum allowable junction temperature (125°C), and TA is the ambient temperature suitable in application. As a general rule, the lower temperature is, the better reliability of the device is. So the PCB mounting pad should provide maximum thermal conductivity to maintain low device temperature. GND pin performs a dual function for providing an electrical connection to ground and channeling heat away. Therefore, connecting the GND pin to ground with a large pad or ground plane would increase the power dissipation and reduce the device temperature. 10 AIC1731 PHYSICAL DIMENSIONS (unit: mm) z SOT-89-5 D A C L H E D1 e S Y M B O L e1 B SOT-89-5 MILLIMETERS MIN. MAX. A 1.40 1.60 B 0.36 0.56 C 0.35 0.44 D 4.40 4.60 D1 1.50 1.83 E 2.29 2.60 e 1.50 BSC e1 3.00 BSC H 3.94 4.25 L 0.80 1.20 Note: 1. Refer to JEDEC TO-243AA. 2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 6 mil per side. 3. Dimension "E" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. 11 AIC1731 z SOT-23-5 D A A E E1 S Y M B O L e e1 SEE VIEW B WITH PLATING MILLIMETERS MIN. MAX. A 0.95 1.45 A1 0.05 0.15 A2 0.90 1.30 b 0.30 0.50 c 0.08 0.22 D 2.80 3.00 E 2.60 3.00 E1 1.50 1.70 e 0.95 BSC e1 1.90 BSC c A A2 b SOT-25 A1 BASE METAL SECTION A-A L L1 0.60 REF 0° 8° 0.25 θ 0.60 0.30 GAUGE PLANE SEATING PLANE θ L L1 VIEW B Note : 1. Refer to JEDEC MO-178AA. 2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 10 mil per side. 3. Dimension "E1" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. Note: Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We reserve the right to change the circuitry and specifications without notice. Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 12