A8113 AITSEMI | Alldatasheet
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AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 1 - DESCRIPTION FEATURES The A8113 is designed for portable RF and wireless applications with demanding performance and space requirements. The A8113 performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. A noise bypass pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The A8113 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand -held wireless devices. The A8113 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 lim iting protection, and high ripple rejection ratio. The A8113 is available in SOT-25 package.
ORDERING INFORMATION
SPQ: 3,000pcs/Reel A8113E5R A8113E5VR Note 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 Quick Start-Up (Typically 50μS) <0.01μA Standby Current When Shutdown. Low Dropout:210mV@300mA Wide Operating Voltage Ranges:2V to 6V TTL-logic-Controlled Shutdown Input 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-25 package APPLICATION LED 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
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 2 - PIN DESCRIPTION Top View Pin # Symbol Function 1 VIN Power Input Voltage. 2 GND Ground. 3 EN Chip Enable Pin : active high with internal 8 MΩ pull down 4 FB FB pin for adjustable version. 5 VOUT Output Voltage.
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 3 - ABSOLUTE MAXIMUM RATINGS VCC, Input Supply Voltage -0.3V to +6V EN Input Voltage -0.3V to +VIN Output Voltage -0.3V to VIN+0.3V Output Current 300mA Maximum Junction Temperature 125°C Operating Temperature Range NOTE1 -40°C to 85°C Storage Temperature Range -65°C to 125°C Lead Temperature (Soldering, 10s) 300°C 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. NOTE1: The A8113 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. THERMAL RESISTANCE Package θJA θJC SOT-25 250°C/W 130°C/W NOTE: Thermal Resistance is specified with approximately 1 square of 1oz copper.
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 4 -
ELECTRICAL CHARACTERISTICS
VIN=3.6V, EN=VIN, CIN=COUT=1μF, CFB=22nF, TA=25℃, unless otherwise noted. Parameter Symbol Conditions Min. Typ. Max. Unit Input Voltage VIN 2 - 6 V Output Voltage AccuracyNOTE2 ΔVOUT VIN=3.6V,IOUT=1mA -1 - +1 -2 - +2 Current Limit ILIM RLOAD=1Ω 400 430 - mA Quiescent Current IQ VEN>1.2V, IOUT=0mA - 90 130 μA Dropout Voltage VDROP IOUT=200mA,VOUT=2.8V - 130 180 mV IOUT=300mA,VOUT=2.8V - 210 300 Line RegulationNOTE3 ΔVLINE VIN=3.6V to 5.5V IOUT=1mA - 0.05 0.17 %/V Load RegulationNOTE4 ΔVLOAD 1mA<IOUT<300mA - - 2 %/A Output Voltage Temperature Coefficient NOTE5 TCVOUT IOUT=1mA - ±60 - ppm/℃ Standby Current ISTBY VEN=GND, Shutdown - 0.01 1 μA EN Input Bias Current IIBSD VEN=GND or VIN - 0 100 nA EN Input Threshold Logic Low VIL VIN=3V to 5.5V, Shutdown - - 0.4 V Logic High VIH VIN=3V to 5.5V, Start up 1.2 - - Output Noise Voltage eNO 10Hz to100kHz, IOUT=200mA, COUT=1uF - 100 - μVRMS Power Supply Rejection Ratio f=217Hz PSRR COUT=1uF, IOUT=100mA - -80 - dB f=1kHz - -78 - f=10kHz - -65 - Thermal Shutdown Temperature TSD Shutdown, Temp increasing - 165 - ℃ Thermal Shutdown Hysteresis TSDHY - 30 - ℃ NOTE2: This IC includes output voltage accuracy ±2%. NOTE3: Line regulation is calculated by NOTE4: Load regulation is calculated by Where VOUT1 is the output voltage when IOUT=1mA, and VOUT2 is the output voltage when IOUT=300mA.△IOUT=0.299A, VOUT(normal)=2.8V. NOTE5: The temperature coefficient is calculated y by
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 5 - TYPICAL PERFORMANCE CHARACTERISTICS 1. Output Voltage vs. Temperature 2. Quiescent Current vs. Temperature 3. Dropout Voltage vs. Load Current 4. PSRR 5. EN Pin Shutdown Threshold vs. Temperature 6. EN Pin Shutdown Response
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 6 - 7. Load Transient Response 8. Load Transient Response 9. Line Transient Response 10. Line Transient Response 11. Start Up
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 7 - BLOCK DIAGRAM
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 8 - DETAILED INFORMATION Applications Information Like any low -dropout regulator, the external capacitors used with the A8113 must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1μF on the A8113 input and the amount of capacitance can be increased without 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 m eet both requirements for minimum amount of capacitance and ESR in all LDOs application. The A8113 is designed specifically to work with 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 A8113 output ensures stability. The A8113 still works well with output capacitor of other types 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 VOUT pin of the A8113 and returned to a clean analog ground. Enable Function The A8113 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 shutdown mode when the voltage on the EN pin falls below 0.4 volts. For to protect the system, the A8113 have a quick discharge function. If the enable function is not needed in a specific application, it may be tied to VIN to keep the LDO regulator in a continuously on state. Programming the A8113 Adjustable LDO regulator The output voltage of the A8113 adjustable regulator is programmed using an external resistor divi der as show in Figure as below. The output voltage is calculated using equation as below: VOUT = VREF x R2 R11 Where: VREF=1.23V typ . (the internal reference voltage) Resistors R1 and R2 should be chosen for approximately 50uA divider curr ent. Lower value resistors can be used for improved noise performance, but the solution consumes more power. Higher resistor values should be avoided as leakage current into/out of FB across R1/R2 creates an offset voltage that artificially increases/decreases the feedback voltage and thus erroneously decrease/increases VOUT. The recommended design procedure is to choose R2=30.1k Ω to set the divider current at 50uA, C1=22pF for stability, and then calculate using Equation as below:
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 9 - R1 = R2 X V V REF OUT 1 In order to improve the stability of the adjustable version, it is suggested that a small compensation capacitor be placed between OUT and FB. The suggested value of this capacitor for several resistor ratios is shown in the table below. Output Voltage Programming Guide Output Voltage R1 R2 C1 1.8V 13.9 kΩ 30.1 kΩ 22pF 2.5V 31.6 kΩ 30.1 kΩ 22pF 3.3V 51 kΩ 30.1 kΩ 22pF 3.6V 59 kΩ 30.1 kΩ 22pF A8113 Adjustable Programming Thermal Considerations Thermal protection limits power dissipation in A8113. 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
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 10 - 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 Where TJ(MAX) is the maximum operation junction temperature 125°C, TA is the ambient temperature and theθ θJA is the junction to ambient thermal resistance. For recommended operating conditions specification of A8113, where TJ(MAX) is the maximum junction temperature of the die(125°C) and TA is the maximum ambient temperature. The junction to ambient thermal resistance ( θJA is layout dependent) for SOT -25 package is 250°C/W on standard JEDEC 51-3 thermal test board. The maximum power dissipation at T A= 25°C can be calculated by following formula: PD(MAX) = (125°C−25°C)/250 = 400mW(SOT-25) The maximum power dissipation depends on operating ambient temperature for fixed TJ(MAX) and thermal resistance θJA. It is also useful to calculate the junction of temperature of the A8113 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 TA=40°C measured by a thermal couple during operation. The power dissipation for the VO=2.8V version of the A8113 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) =125°C For this operating condition, TJ is lower than the absolute maximum operating junction temperature,125°C, so it is safe to use the A8113 in this configuration.
AiT Semiconductor Inc. www.ait-ic.com A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 11 -
PACKAGE INFORMATION
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 A8113 HIGH POWER WHITE LED DRIVER 300mA UL TRA-LOW NOISE, UL TRA-FAST REV2.1 - JUN 2011 RELEASED, AUG 2019 UPDTAED - - 12 - 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 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 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 de ath, 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.