A6345A AITSEMI | Alldatasheet

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AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 1 - DESCRIPTION FEATURES The A6345A is a low dropout (LDO) voltage regulator that can deliver up to 300mA of current while consuming only 3μA of quiescent current (typical). The input operating range is specified from 2.5V to 45V, making it an ideal choice for two to six or more primary cell battery-powered applications, 9V alkaline and one or two-cell Li-Ion-Power applications. A6345A provides wide input voltage range and ensure the stability of fixed output voltage of 1.8V, 2.5, 3.0, 3.3V and 5.0V. The A6345A is available in SOT-223 and SOP8 packages.

ORDERING INFORMATION

SPQ: 1,000pcs/Reel N A6345ANR-XXZ A6345ANVR-XXZ SOP8 SPQ: 4,000pcs/Reel M8 A6345AM8R-XX A6345AM8VR-XX Note XX: Output Voltage 25=2.5V; 33=3.3V Z: Package Type see pin description V: Halogen free Package R: Tape & Reel AiT provides all RoHS products ⚫ Reduced Ground Current During Dropout ⚫ Faster Startup Time ⚫ 3.0μA Typical Quiescent Current ⚫ Input Operating Voltage Range: 2.5V to 45V ⚫ 300mA Output Current ⚫ Low Dropout Voltage, 335mV Typical@100mA for 3.3Vout. ⚫ ±2% Typical Output Voltage Tolerance, ±1% can be customized ⚫ Current Limit Protection ⚫ Over Temperature Protection ⚫ Available in SOT-223, and SOP8 packages APPLICATION ⚫ Battery-Powered Devices ⚫ Battery-Powered Alarm Circuits ⚫ Smoke Detectors ⚫ CO2 Detectors ⚫ Smart Battery Packs ⚫ Low Quiescent Current Voltage Reference ⚫ BMS systems ⚫ Motor control system/Industrial control system ⚫ Power Meter/Instrument ⚫ Solar-Powered Instrument ⚫ White Goods ⚫ Vehicle-mounted system ⚫ Automotive Head Unit ⚫ Security Equipment ⚫ Communication Equipment TYPICAL APPLICATION

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 2 - PIN DESCRIPTION Top View Top View Top View Pin # Symbol Function SOT-223 SOP8 A B 1 3 2 VIN Regulator Input. Up to 45V input voltage. At least 1μF supply bypass capacitor is recommended. 2 1 5,6,7,8 GND Ground 3 2 3 VOUT Regulator Output. Recommended output capacitor range:1μF to 10μF. - - 1 EN Enable pin. Drive this pin high to enable the device, Low to put the device into low current shutdown. - - 4 NC No connection

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 3 - ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range, unless otherwise notedNOTE1 VIN, Input Voltage -0.3V ~ 50V VEN, Enable Input Voltage -0.3V ~ VIN TJ, Junction Temperature -40℃ ~ 150℃ PD, Continuous Power DissipationNOTE2 Internally Limited ESD Ratings V(ESD), Electrostatic Discharge Human-body model (HBM) ±4000V Charge device model (CDM) ±1500V Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range, unless otherwise notedNOTE1 Parameter Symbol Min. Max. Unit Input Supply Voltage VIN 2.5 45 V Output Current IOUT 0 300 mA Capacitor of VIN pin CIN 1 10 uF Capacitor of VOUT Pin COUT 1 10 uF Equivalent series resistance ESR 5 100 mΩ Operating Temperature TA -40 +85NOTE2 ℃ NOTE1: All voltages are with respect to the GND pin. NOTE2: The chip’s operating temperature is determined by the junction temperature (TJ), the relationship between TA and TJ, please refer to the application note as below.

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 4 -

ELECTRICAL CHARACTERISTICS

VIN = VOUT + 2V, CIN = COUT = 1μF, VOUT = 3.3V, typical values are at TA = +25°C, unless otherwise noted. Parameter Symbol Conditions Min. Typ. Max. Unit Input Voltage VIN 2.5 NOTE3 - 45 V Output Voltage Accuracy IOUT = 10mA -2.0 - 2.0 % Ground Pin Current IQ No load - 3.0 4.0 µA Shutdown Current IQ-OFF VEN =0V - 0.1 1.0 µA Max Output CurrentNOTE4 300 350 - mA Dropout VoltageNOTE5 VDROP IOUT = 100mA VOUT=1.8V - 450 550 mV VOUT=2.5V - 385 485 VOUT=3.0V - 350 450 VOUT=3.3V - 335 435 VOUT=5.0V - 300 400 Line Regulation ΔVOUT ΔVIN × VOUT VIN = VOUT + 2V to 36V, IOUT = 1mA - 0.05 0.2 %/V Load Regulation ΔVOUT VIN =VOUT+1V, IOUT = 1mA to 50mA - 5 20 mV Output Current Limit I_LMT VIN =VOUT+1V 300 450 - mA Short Current ISHORT VOUT = 0 - 100 - mA Power Supply Rejection Ratio PSRR VOUT = 3.3V, IOUT = 10mA f = 217Hz - 72 - dB f = 1kHz - 77 - f = 10KHz - 60 - EN Input Threshold VENH 1.2 - - V VENL - - 0.4 Output Voltage Temperature Coefficient NOTE6 ΔVOUT ΔTA × VOUT ILOAD = 1mA TA=-40°C to +85°C - 100 - ppm/℃ Output Noise Voltage en VIN =VOUT+1V, IOUT = 1mA， VOUT=3.0V, f = 10Hz~100KHz - 100 - µVRMS Thermal Shutdown Temperature TSHDN - 170 - °C Thermal Shutdown Hysteresis TSDH - 20 - °C NOTE3: VIN >= VOUT (NOMINAL), whichever is greater. NOTE4: Maximum output current is affected by the PCB layout, size of metal trace, the thermal conduction path between metal layers, ambient temperature and the other environment factors of system. Attention should be paid to the dropout voltage when VIN < VOUT + VDROP. NOTE5: The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT for VIN = VOUT (NOMINAL) + 2V. NOTE6: Output voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range.

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 5 - TYPICAL PERFORMANCE CHARACTERISTICS VIN = VOUT + 2V, CIN = COUT = 1μF, VOUT = 3.3V, typical values are at TA = +25°C, unless otherwise noted. 1. Line Transient Response 2. Power-Up/Power-Down Output Waveform 3. Load Transient Response 4. Load Transient Response 5. Line Regulation 6. Load Regulation

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 6 - 7. VOUT vs. Temperature 8. VDROP vs. IOUT 9. IQ vs. Temperature 10. IOUT vs. VDROP 11. VOUT-IOUT vs. Temperature 12. VOUT-VIN vs. Temperature (IOUT=10mA)

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 7 - BLOCK DIAGRAM

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 8 - DETAILED INFORMATION Overview The A6345A low-dropout regulators (LDO) consumes only 3 μA of quiescent current at light load and delivers excellent line and load transient performance. These characteristics, combined with low noise and good PSRR with low dropout voltage, make this device ideal for portable consumer applications. Thermal Considerations When the junction temperature is too high, the thermal protection circuitry sends a signal to the control logic that will shut down the IC. The IC will restart when the temperature has sufficiently cooled down. The maximum power dissipation is dependent on the thermal resistance of the case and the circuit board, the temperature difference between the die junction and the ambient air, and the rate of air flow. The GND pin must be connected to the ground plane for proper dissipation. Applications Note: 1. The phase compensation circuit and ESR of the output capacitor are used inside the circuit to compensate, so a capacitor larger than 1.0uF must be connected to the ground. 2. It is recommended to use 1uF polar capacitors for input and output, and to keep the capacitors as close to the VIN and VOUT pins of LDO as possible. 3. Pay attention to the use conditions of input and output voltages and load currents to avoid the power consumption (PD) inside the IC exceeding the maximum power consumption allowed by the package. PD=(VIN－VOUT)×IOUT TPN = PD×RθJA+T TPN is junction temperature T is ambient temperature。 4. When the input voltage V IN is greater than 2.5V, if V IN is also higher than the output set value plus the device dropout voltage, VOUT is equal to the set value. Otherwise, VOUT is equal to VIN minus the dropout voltage. If VIN lower than 2.5V, the VOUT is: VOUT = VIN - VDropout

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 9 -

PACKAGE INFORMATION

Dimension in SOT-223 (Unit: mm) Symbol Millimeters Inches Min Max Min Max A - 1.80 - 0.071 A1 0.02 0.10 0.001 0.004 A2 1.55 1.65 0.061 0.065 b 0.66 0.84 0.026 0.033 b2 2.90 3.10 0.114 0.122 c 0.23 0.33 0.009 0.013 D 6.30 6.70 0.248 0.263 E 6.70 7.30 0.263 0.287 E1 3.30 3.70 0.130 0.145 e 2.30 BSC 0.090 BSC e1 4.60 BSC 0.181 BSC L 0.90 - 0.035 -

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 10 - Dimension in SOP8 (Unit: mm) Symbol Millimeters Inches Min Max Min Max A 1.350 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.007 0.010 D 4.800 5.000 0.189 0.197 e 1.270 BSC 0.050 BSC E 5.800 6.200 0.228 0.244 E1 3.800 4.000 0.150 0.157 L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8°

AiT Semiconductor Inc. www.ait-ic.com A6345A CMOS LOW DROPOUT VOL TAGE REGULATOR (LDO) 45V , 300mA, LOW QUIESCENT CURRENT REV1.0 - NOV 2021 RELEASED - - 11 - IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relev ant information to verify, before placing orders, that the information being relied on is current. AiT Semiconductor Inc. 's integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of death, personal injury, or servere property, or e nvironmental damage. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT warrants the performance of its products of the specifications applicable at the time of sale.