A6303A AITSEMI | Alldatasheet
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AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 1 - DESCRIPTION FEATURES The A6303A is designed for portable RF and wireless applications with demanding performance and space requirements. The A6303A performance is optimized for battery -powered systems to deliver ultra low noise and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The A6303A also works with low -ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand -held wireless dev ices. The A6303A consumes less than 0.01µA in shutdown mode and has fast turn -on time less than 50µs. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. The A6303A is available in SOT-23, SOT-25 and SC70-5 Packages.
ORDERING INFORMATION
SPQ: 3,000pcs/Reel E3 A6303AE3R-XXZ A6303AE3VR-XXZ SOT-25 SPQ: 3,000pcs/Reel E5 A6303AE5R-XXZ A6303AE5VR-XXZ SC70-5 SPQ: 3,000pcs/Reel C5 A6303AC5R-XX A6303AC5VR-XX Note XX: Output Voltage 33= 3.3V, 50= 5.0V Z: Output Type A = A Type V: Halogen free Package R: Tape & Reel AiT provides all RoHS products Ultra-low Noise for RF Application Ultra-Fast Response in Line/Load Transient <0.01μA Standby Current When Shutdown (SOT-25, SC70-5) Low Dropout: 210mV@300mA Wide Operating Voltage Ranges: 2V to 6V Wide Output Voltage Range:1.2V to 5V TTL-logic-Controlled Shutdown Input (SOT-25, SC70-5) Low Temperature Coefficient Current Limiting Protection Thermal Shutdown Protection Only 1μF Output Capacitor Required for Stability High Power Supply Rejection Ratio Custom Voltage Available Fast output discharge Available in SOT-23, SOT-25, SC70-5 Packages APPLICATION Cellular and Smart Phones Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments PCMCIA Cards MP3/MP4/MP5 Players Portable Information Appliances TYPICAL APPLICATION NOTE: Output capacitor (C2 ≥ 2.2uF) is recommended in A6303A-1.2V, A6303A-1.3V, A6303A-1.5V and A6303A-1.8V application to assure the stability of circuit.
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 2 - PIN DESCRIPTION Top View Top View Top View Package SOT-23 SOT-25 SC70-5 Symbol Function Pin Type A A Pin # 3 1 1 VIN Power Input Voltage. 1 2 2 GND Ground - 3 3 EN Chip Enable Pin. Active high with internal 8MΩ pull down - 4 4 NC No Connection 2 5 5 VOUT Output Voltage. THERMAL RESISTANCE Package θJA θJC SOT-23 250°C/W 130°C/W SOT-25 250°C/W 130°C/W SC70-5 333°C/W 170°C/W NOTE: Thermal Resistance is specified with approximately 1 square of 1 oz copper.
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 3 - ABSOLUTE MAXIMUM RATINGSNOTE1 VIN, Input Supply Voltage SOT-25, SC70-5 SOT-23 -0.3V ~ +6V -0.3V ~ +6.5V EN Pin Input Voltage (SOT-25, SC70-5) -0.3V ~ VIN Output Voltages -0.3V ~ VIN+0.3V Output Current 300mA Maximum Junction Temperature SOT-25, SC70-5 150°C SOT-23 125°C Operating Temperature RangeNOTE2 -40oC ~ 85oC Storage Temperature Range -65°C ~ 125°C Lead Temperature (Soldering, 10s) 300°C Stresses above may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the Electrical Characteristics are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. NOTE1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. NOTE2: The A6303A is guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls.
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 4 - ELECTRICAL CHARACTERISTICSNOTE3 VIN = 3.6V, EN = VIN (SOT-25, SC70-5), CIN = COUT = 1uF, TA = 25°C, unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit Input Voltage VIN 2 - 6 V Output Voltage AccuracyNOTE4 ΔVOUT VIN = 3.6V, IOUT = 1mA -2 - +2 % Current Limit ILIM RLOAD = 1Ω 400 430 - mA Quiescent Current IQ VEN > 1.2V, IOUT = 0mA SOT-25 - 90 130 μA SC70-5 IOUT = 0mA SOT-23 Dropout Voltage VDROP IOUT = 200mA, VOUT = 2.8V - 130 180 mV IOUT = 300mA, VOUT = 2.8V - 210 300 Line RegulationNOTE5 ΔVLINE VIN = 3.6V to 5.5V IOUT = 1mA - 0.05 0.17 %/V Load RegulationNOTE6 ΔVLOAD 1mA < IOUT < 300mA - - 2 %/A Output VoltageNOTE7 Temperature Coefficient TCVOUT IOUT = 1mA - ±60 - ppm/oC Standby Current ISTBY VEN = GND, Shutdown SOT-25 - 0.01 0.1 μA SC70-5 EN Input Bias Current IIBSD VEN =GND or VIN SOT-25 - - 500 nA SC70-5 EN Input Threshold Logic Low VIL VIN = 3V to 5.5V, Shutdown SOT-25 - - 0.4 V SC70-5 Logic High VIH VIN = 3V to 5.5V, Start up SOT-25 1.2 - - SC70-5 Output Noise Voltage eNO 10Hz to 100kHz, IOUT = 200mA - 100 - μVRMS Power Supply Rejection Ratio f = 217Hz PSRR IOUT = 100mA - -78 - dB f = 1kHz -72 f = 10kHz -52 Thermal Shutdown Temperature TSD Shutdown, Temp increasing - 165 - oC Thermal Shutdown Hysteresis TSDHY - 30 - oC NOTE3: 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization. NOTE4: Output voltage accuracy : ±2%. NOTE5: Line regulation is calculated by ΔVLINE = [(VOUT1 – VOUT2) / (ΔVIN x VOUT(NORMAL))] x 100. Where VOUT1 is the output voltage when VIN NOTE6: Load regulation is calculated by ΔVLOAD = [(VOUT1 – VOUT2) / (ΔIOUT x VOUT(NORMAL))] x 100. Where VOUT1 is the output voltage when IOUT = 1mA, and VOUT2 is the output voltage when IOUT = 300mA. ΔIOUT = 0.299A, VOUT(NORMAL) = 2.8V. NOTE7: The temperature coefficient is calculated by TCVOUT = [ΔVOUT / (ΔT x VOUT)]
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 5 - TYPICAL PERFORMANCE CHARACTERISTICS 1. Output Voltabe vs. Temperature VIN = 3.6V, CIN = COUT = 1uF 2. Quiescent Current vs. Temperature VIN= 3.6V, CIN = COUT = 1uF 3. Dropout Voltage vs. Load Current VOUT = 2.8V(SOT-23,), CIN = COUT = 1uF 4. PSRR VIN = 4.2V, CIN = 1uF, COUT = 1uF X7R 5. EN Pin Shutdown Threshold Vs. Temperature (SOT-25, SC70-5) VIN=3.6V, CIN = COUT = 1uF 6. Current Limit Vs. Input Voltage CIN = COUT = 1uF, VOUT=2.8V
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 6 - 7. Load Transient Response VIN=5V, VOUT=2.8V, CIN = COUT = 1uF, IOUT=1mA to 50mA 8. Load Transient Response VIN=5V, VOUT=2.8V, CIN = COUT = 1uF, IOUT=1mA to 250mA 9. Line Transient Reaponse VIN=4V to 5V, VOUT=2.8V, CIN = COUT = 1uF, IOUT=1mA 10. Line Transient Response VIN=4V to 5V, VOUT=2.8V, CIN = COUT = 1uF, IOUT=100mA 11. Start Up (SOT-25, SC70-5) VIN= 5V, VOUT=2.8V, CIN = COUT = 1uF, No Load 12. EN Pin Shutdown Response (SOT-25, SC70-5) VIN= 5V, VOUT=2.8V , CIN = COUT = 1uF, No Load
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 7 - 13. VOUT vs. VIN VOUT = 2.8V(SOT-23), CIN = COUT = 1uF
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 8 - BLOCK DIAGRAM
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 9 - DETAILED INFORMATION Like any low-dropout regulator, the external capacitors used with the A6303A must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1µF on the A6303A input and the amount of capacitance can be increased wi thout limit. The input capacitor must be located a distance of not more than 0.5 inch from the input pin of the IC and returned to a clean analog ground. Any good quality ceramic or tantalum can be used for this capacitor. The capacitor with larger value and lower ESR (equivalent series resistance) provides better PSRR and line -transient response. The output capacitor must meet both requirements for minimum amount of capacitance and ESR in all LDOs application. The A6303A is designed specifically to work wi th low ESR ceramic output capacitor in space -saving and performance consideration. Using a ceramic capacitor whose value is at least 1µF with ESR is > 25mΩ on the A6303A output ensures stability. The A6303A still works well with output capacitor of other t ypes due to the wide stable ESR range. Output capacitor of larger capacitance can reduce noise and improve load transient response, stability, and PSRR. The output capacitor should be located not more than 0.5 inch from the V OUT pin of the A6303A and returned to a clean analog ground. Enable Function (SOT-25, SC70-5) The A6303A features an LDO regulator enable/disable function. To assure the LDO regulator will switch on; the EN turn on control level must be greater than 1.2 volts. The LDO regulator will go into the shut down mode when the voltage on the EN pin falls below 0.4 volts. For to protect the system, the A6303A have a quick discharge function. If the enable function is not needed in a specific application, it may be tied to V IN to keep the LDO regulator in a continuously on state. Thermal Considerations Thermal protection limits power dissipation in A6303A. When the operation junction temperature exceeds 165°C, the OTP circuit starts the thermal shutdown function turn the pass element off. The pass element turns on again after the junction temperature cools by 30°C. For continue operation, do not exceed absolute maximum operation junction temperature 125°C. The power dissipation definition in device is: PD = (VIN−VOUT) ×IOUT + VIN×IQ (SOT-23) The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula： PD(MAX) = ( TJ(MAX) − TA ) /θJA
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 10 - Where TJ(MAX) is the maximum operation junction temperature 125°C, T A is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification of A6303A, where T J(MAX) is the maximum junction temperature of the die (125°C) and T A is the maximum ambient temperature. The junction to ambient thermal resistance (θ JA is layout dependent) for SOT-23, SOT-25 package is 250°C/W, SC70- 5 package is 333°C/W, on standard JEDEC 51 -3 thermal test board. The maximum power dissipation at TA= 25°C can be calculated by following formula: PD(MAX) = (125°C−25°C)/250 = 400mW (SOT-23, SOT-25) PD(MAX) = (125°C−25°C)/333 = 300mW (SC70-5) The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θJA. It is also useful to calculate the junction of temperature of the A6303A under a set of specific conditions. In this example let the Input voltage V IN=3.3V, the output current Io=300mA and the case temperature T A=40°C measured by a thermal couple during operation. The power dissipation for the VOUT=2.8V version of the A6303A can be calculated as: PD = (3.3V−2.8V) ×300mA+3.6V×100uA =150mW And the junction temperature, TJ, can be calculated as follows: TJ=TA+PD×θJA=40°C+0.15W×250°C/W =40°C+37.5°C=77.5°C<TJ(MAX)= 150°C For this operating condition, TJ is lower than the absolute maximum operating junction temperature,125°C, so it is safe to use the A6303A in this configuration. Layout considerations To improve ac performance such as PSRR, output noise, and transient response, it is recommended that the PCB be designed with separate ground planes for VIN and VOUT, with each ground plane connected only at the GND pin of the device.
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 11 - A6303A-2.8V(SOT-25, SC70-5) Layout Circuit TOP Layer Layout BOTTOM Layer Layout
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 12 -
PACKAGE INFORMATION
Dimension in SOT-23 Package (Unit: mm)
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 13 - Dimension in SOT-25 (Unit: mm) Symbol Millimeters Inches Min Max Min Max A 0.889 1.295 0.035 0.051 A1 0.000 0.152 0.000 0.006 B 1.397 1.803 0.055 0.071 b 0.356 0.559 0.014 0.022 C 2.591 2.997 0.102 0.118 D 2.692 3.099 0.106 0.122 e 0.838 1.041 0.033 0.041 H 0.080 0.254 0.003 0.010 L 0.300 0.610 0.012 0.024
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 14 - Dimension in SC70-5 (Unit: mm) Symbol Millimeters Inches Min Max Min Max A 0.800 1.100 0.031 0.044 A1 0.000 0.100 0.000 0.004 B 1.150 1.350 0.045 0.054 b 0.150 0.400 0.006 0.016 C 1.800 2.450 0.071 0.096 D 1.800 2.250 0.071 0.089 e 0.650 TYP 0.026 TYP H 0.080 0.260 0.003 0.010 L 0.210 0.460 0.008 0.018
AiT Semiconductor Inc. www.ait-ic.com A6303A CMOS LOW DROPOUT REGULATOR (LDO) 300mA U L TRA-LOW NOISE, UL TRA-FAST RESPONSE REV1.5 -DEC 2009 RELEASED, APR 2019 UPDATED - - 15 - 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 ad vises its customers to obtain the latest version of relevant 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 war ranted 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 dea th, personal injury, or server property, or environmental 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.