A1117A AITSEMI

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AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 1 - DESCRIPTION FEATURES A1117A is a series of low dropout three -terminal regulators with a typical dropout of 1.3V at 1A load current. Besides fixed voltage version ( VOUT = 1.2V, 1.8V, 2.5V, 3.3V, 5V), A1117A has an adjustable version that can provide an o utput voltage from 1.25 to 12V with two external resistors. A1117A offers thermal shut down functions to assure stability of chip and power system. Trimming technique is used to guarantee output voltage accuracy within ±2%. The A1117A is available in SOT-223, TO -252 and SOT89-3 packages. ⚫ Maximum output current is 1A ⚫ Range of operation input voltage: Max 15V ⚫ Line regulation: 0.1%/V (typ.) ⚫ Load regulation: 10mV (typ.) ⚫ Environment Temperature: -20°C ~85°C ⚫ Available in SOT -223 , TO -252 and SOT89 -3 packages APPLICATION ⚫ DVB ⚫ Computer Mother Board, Graphic Card ⚫ LCD Monitor and LCD TV ⚫ DVD Decode Board ⚫ ADSL Modem ⚫ Post Regulators for Switching Supplies ORDERING INFORMATION TYPICAL APPLICATION Package Type Part Number SOT-223 SPQ: 2,500pcs/Reel N A1117ANR-XX A1117ANVR-XX TO-252 SPQ: 2,500pcs/Reel D A1117ADR-XX A1117ADVR-XX SOT89-3 SPQ: 1,000pcs/Reel K3 A1117AK3R-XX A1117AK3VR-XX Note XX: Output Voltage, 12=1.2V, 18=1.8V, ADJ: Adjustable V: Halogen free Package R: Tape & Reel AiT provides all RoHS products Application circuit of A1117A fixed version

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 2 - PIN DESCIPTION Top View Top View Top View Pin # SOT-223 TO-252 SOT89-3 A1117A -XX A1117A -ADJ A1117A -XX A1117A -ADJ A1117A -XX A1117A -ADJ

1 GND ADJ GND ADJ GND ADJ

2 VOUT VOUT VOUT VOUT VOUT VOUT

3 VIN VIN VIN VIN VIN VIN

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 3 - ABSOLUTE MAXIMUM RATINGS Max Input Voltage 15V TJ, Max Operating Junction Temperature 150°C TA, Ambient Temperature -40°C ~ 85°C Package Thermal Resistance SOT-223 20°C/W TO-252 10°C/W TS, Storage Temperature -40°C ~ 150°C Lead Temperature & Time 260°C, 10s 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 WORKING CONDITIONS Parameter Symbol Value Units Input Voltage Range Max. 12 V Operating Junction Temperature TJ -20 ~ 125 °C

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 4 -

ELECTRICAL CHARACTERISTICS

TJ = 25°C Parameter Symbol Conditions Min. Typ. Max. Unit Reference Voltage VREF 10mA≤IOUT≤1A , VIN=3.25V ADJ 1.225 1.25 1.275 V Output Voltage VOUT V 0≤IOUT≤1A , VIN=7.0V 5.0V 4.9 5 5.1 Line Regulation ΔVOUT IOUT=10mA, 2.75V≤VIN≤12V ADJ - 0.1 0.2 %/V IOUT=10mA, 2.7V≤VIN≤10V 1.2V IOUT=10mA, 3.3V≤VIN≤12V 1.8V IOUT=10mA, 4.0V≤VIN≤12V 2.5V IOUT=10mA, 4.8V≤VIN≤12V 3.3V IOUT=10mA, 6.5V≤VIN≤12V 5.0V Load Regulation ΔVOUT VIN =2.75V, 10mA≤IOUT≤1A ADJ - 10 30 mV VIN =2.7V, 10mA≤IOUT≤1A 1.2V VIN=3.3V, 10mA≤IOUT≤1A 1.8V VIN=4.0V, 10mA≤IOUT≤1A 2.5V VIN=4.8V, 10mA≤IOUT≤1A 3.3V VIN=6.5V, 10mA≤IOUT≤1A 5.0V Dropout Voltage VDROP IOUT=100mA - 1.23 1.3 V IOUT=1A - 1.3 1.5 Current Limit Ilimit VIN-VOUT=2V, TJ=25°C 1 - - A Minimum Load Current Imin ADJ - 2 10 mA Quiescent Current Iq VIN =10V 1.2V - 2 3.5 mA VIN =12V 1.8V VIN =12V 2.5V VIN =12V 3.3V VIN =12V 5.0V Adjust Pin Current IADJ VIN =5V, 10mA≤IOUT≤1A ADJ - 55 120 μA IADJ change ICHANGE VIN =5V, 10mA≤IOUT≤1A ADJ - 0.2 10 μA Temperature Coefficient ΔV/ΔT - ±100 - ppm Thermal Resistor θJC SOT-223 - 20 - oC/W TO-252 - 10 - SOT-89-3 - 40 - NOTE1: All test are conducted under ambient temperature 25°C and within a short period of time 20ms NOTE2: Load current smaller than minimum load current of A1117A-ADJ will lead to unstable or oscillation output.

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 5 - TYPICAL PERFORMANCE CHARACTERISTICS T=25°C, unless specified. 1. Line Regulation A1117A-ADJ VOUT Vs. VIN 2. Load Regulation A1117A-ADJ VOUT Vs. IOUT 3. Dropout Voltage A1117A-ADJ Dropout Vs. IOUT 4. Thermal performance with OTP A1117A-ADJ VOUT Vs. Temp

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 6 - BLOCK DIAGRAM

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 7 - DETAILED DESCRIPTION A1117A is a series of low dropout voltage, three terminal regulators. Its appl ication circuit is very simple: the fixed version only needs two capacitors and the adjustable version only needs two resistors and two capacitors to work. It is composed of some modules including start -up circuit, bias circuit, bandgap, thermal shutdown, current limit, power transistors and its driver circuit and so on. The thermal shut down modules can assure chip and its application system working safety when the junction temperature is larger than 140°C. The bandgap module provides stable reference voltage, whose tempera ture coefficient is compensated by careful design considerations. The temperature coefficient is under 100 ppm/°C. And the accuracy of output voltage is guaranteed by trimming technique. TYPICAL APPLICATION A1117A has an adjustable version and fixed versions (1.2V, 1.8V, 2.5V, 3.3V and 5V) Fixed Output Voltage Version Application circuit of A1117A fixed version 1. Recommend using 10uF tan capacitor as bypass capacitor for all application circuit. 2. Recommend using 10uF tan capacitor to assure circuit stability.

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 8 - Adjustable Output Voltage Version A1117A-ADJ provides a 1.25V reference voltage. Any output voltage between 1.25V~12V can be achievable by choosing two external resistors (schematic is shown below), R1 and R2 Application Circuit of A1117A-ADJ The output voltage of adjustable version follows the equation: VOUT =1.25 x (1+R2/R1) + IADJ x R2. We can ignore IADJ because IADJ (about 50uA) is much less than the current of R1 (about 2~10mA). 1. To meet the minimum load current (>10mA ) requirement, R1 is recommended to be 125 Ω or lower. As A1117A-ADJ can keep itself stable at load current about 2mA, R1 is not allowed to be higher than 625Ω. 2. Using a bypass capacitor (C ADJ) between the ADJ pin and ground can improve ripple rejection. This bypass capacitor prevents ripple from b eing amplified as the output voltage is increased. The impedance of CADJ should be less than R1 to prevent ripple from being amplified. As R1 is normally in the range of 100Ω~500Ω, the value of CADJ should satisfy this equation: 1/(2 x fripple x CADJ)<R1. THERMAL CONSIDERATIONS We have to take heat dissipation into great consideration when output current or differential voltage of input and output voltage is large. Because in such cases, the power dissipation consumed by A1117A is very large. A1117A series uses SOT-223 package type and its thermal resistance is about 20°C/W. And the copper area of application board can affect the total thermal resistance. If copper area is 5cm*5cm (two sides), the resistance is about 30°C/W. So the total thermal resistance is about 20°C/W + 30°C/W. We can decrease total thermal resistance by increasing copper area in application board. When there is no good heat dissipation copper are in PCB, the total thermal resistance will be as high as 120°C/W, then the power dissipation of A1117A could allow on itself is less than 1W. And furthermore, A1117A will work at junction temperature higher than 125°C under such condition and no lifetime is guaranteed.

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 9 -

PACKAGE INFORMATION

Dimension in SOT-223 (Unit: mm) Symbol Min Max Symbol Min Max A - 1.80 E 6.80 7.20 A1 0.02 0.10 E1 3.40 3.60 A2 1.50 1.70 E2 3.33 3.53 A3 0.80 1.00 e 2.30BSC b 0.67 0.80 e1 4.60BSC b1 0.66 0.76 L 0.80 1.20 b2 2.96 3.09 L1 1.75REF b3 2.95 3.05 L2 0.25BSC c 0.30 0.35 R 0.10 - c1 0.29 0.31 R1 0.10 - D 6.48 6.58 θ 0° 8° D1 6.55 6.65 θ1 10° 14° D2 - 7.05

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 10 - Dimension in TO-252 Package (Unit: mm) Symbol Min Max Symbol Min Max A 2.20 2.38 E 6.50 6.70 A1 0.00 0.10 E1 4.70 - A2 0.90 1.10 e 2.28BSC b 0.77 0.89 H 9.80 10.40 b1 0.76 0.86 L 1.40 1.70 b2 0.77 1.10 L1 2.90REF b3 5.23 5.43 L2 0.51BSC c 0.47 0.60 L3 0.90 1.25 c1 0.46 0.56 L5 0.90 1.50 c2 0.47 0.60 L6 1.80REF D 6.00 6.20 θ 0° 8° D1 5.25 - θ1 3° 7° θ2 1° 5°

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 11 - Dimension in SOT89-3 (Unit: mm)

AiT Semiconductor Inc. www.ait-ic.com A1117A BIPOLAR LDO REGULATOR 1A CURRENT LIMIT AND THERMAL PROTECTION REV3.2 - JUL 2010 RELEASED, JUN 2020 UPDATED - - 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 or ders, 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 appl ications. 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 e property, or environmental damage. In order to minimize risks associa ted 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.