ACE1084 5A Bipolar Linear Regulator Description ACE1084 is a series of low dropout three-terminal regulators with a typical dropout voltage of 1.4V at 5A load current. Other than fixed voltage versions (1.8V, 2.5V, 3.3V, 5.0V), ACE1084 has an adjustable voltage version, with which desired voltage can be achieved by setting the values of two external resistors of the application circuitry. ACE1084 offers thermal shut down and current limit functions, to assure stability of chip and power system. ACE1084 series is available in standard pcakages of TO-263-2L, TO-263-3L, TO-220 and TO-252. Features ● Fixed and adjustable versions. ● Maximum output current is 5A. ● Maximum input voltage: 15V ● Line regulation: 0.2% (typ.) ● Load regulation: 0.2% (typ.) ● On-Chip Thermal Shutdown ● Operation environment Temperature: 0℃~80℃ Application ● Power Management for Computer Mother Board, Graphic Card ● Battery Charger ● Post Regulators for switching supplies ● Microprocessor Supply. Absolute Maximum Ratings Parameter Value Max Input Valtage 15V Operating Junction Temperature(Tj) 150 OC Ambient Temperature 0 OC-80 OC TO-252 Package Thermal Resistance TO-263 TO-220 12..5 OC/W Storage temperature(Ts) -40 OC-150 OC Lead Temperature & Time 260 OC,10S 3. OC/W 3. OC/W Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. VER 1.4 1 ACE1084 5A Bipolar Linear Regulator Typical Application ACE1084 Fig 1. ACE1084 fixed version Application circuit NOTE: Input capacitor (Cin=10uF) and Output capacitor (Cout=22uF) are recommended in all application circuit. Tantalum capacitor is preferred. Packaging Type TO-252 TO-263-3 TO-263-2 TO-220 Description 1 1 1 1 ADJ/GND 2 2 2 2 Vout 3 3 3 3 Vin VER 1.4 2 ACE1084 5A Bipolar Linear Regulator Typical Electrical Characteristics ACE1084-ADJ Vout vs. Temp Fig 2. Dropout Voltage VS. Output Current Recommended work conditions Parameter Value Input Voltage Range Max. 15V Operating Junction Temperature (TJ) 0 OC ~ 125 OC Ordering information ACE1084 XX XX + H Halogen - free Pb - free YM : TO-252 2WN: TO-263-2 1WN :TO-263-3 ZM : TO-220 Output Voltage : 1.8 / 3.3V / Default: Adjustable Version VER 1.4 3 ACE1084 5A Bipolar Linear Regulator Electrical Characteristics Parameter Symbol Test Conditions Min Typ Reference Voltage Vref 10mA≦Iout≦SA,1.5V≦Vin-Vout≦5V 1.225 1.25 O lout=0mA,Vin=4.8V,Tj=25 C 10mA≦Iout≦5A, 3.4V≦Vin≦7V ACE1084-2.50V O lout=0mA,Vin=5.5V,Tj=25 C Vout 10mA≦Iout≦5A, 4.1V≦Vin≦7V O lout=0mA,Vin=8.0V,Tj=25 C 10mA≦Iout≦5A, 6.6V≦Vin≦10V ACE1084-3.3V O lout=0mA,Vin=6.3V,Tj=25 C 10mA≦Iout≦5A, 4.9V≦Vin≦8V ACE1084-ADJ 1.80 1.83 V V 6 2.462 2.50 2.45 2.50 2.53 7 V 2.55 3.25 3.3 0 3.234 3.3 3.36 4.925 5.0 4.90 5.0 5.07 5 10 40 10 40 16 50 16 50 16 50 16 50 16 50 ACE1084-1.2V, Vin=10V 2 5 ACE1084-1.8V, Vin=12V 2 5 ACE1084-2.5V, Vin=12V 2 5 ACE1084-3.3V, Vin=12V 2 5 Iout=10mA, 6.6V≦Vin≦10V ACE1084-ADJ Vin-Vout=1.6v, 0≦Iout≦4A ACE1084-1.8V Vin-Vout=1.6v, 0≦Iout≦4A ACE1084-2.5V Vin-Vout=1.6v, 0≦Iout≦4A ACE1084-3.3V Vin-Vout=1.6v, 0≦Iout≦4A ACE1084-5.0V Vin-Vout=1.6v, 0≦Iout≦4A V 5.10 40 ACE1084-3.3V V 6 10 ACE1084-2.5V Iout=10mA, 4.1V≦Vin≦10V ACE1084-5.0V IQ 1.764 40 Iout=10mA, 4.9V≦Vin≦10V Quiescent Current 7 10 Iout=10mA, 3.4V≦Vin≦10V △Vout 1.80 40 ACE1084-1.8V Load Regulation 1.773 10 Iout=10mA, 2.85V≦Vin≦10V △Vout 5 2.35 ACE1084-5.0V Line Regulation 1.27 Unit 1.82 ACE1084-1.80V Output Voltage Max VER 1.4 mV mV mA 4 ACE1084 5A Bipolar Linear Regulator Drupout Voltage (note 3) Iadj change ACE1084-5.0V, Vin=12V 2 5 ACE1084-12.0V, Vin=20V 2 5 IADJ-IOUT 1.4 10mA≦Iout≦5A Ichange Current Limit Minimum load Current Quiescent Current 0.4 1.5V≦Vin-Vout≦6V V 10 uA Vin-Vout=2V, TJ=25℃ 7 A lmin ACE1084-ADJ 3 10 mA Iq Vin=10V 5 10 mA lAdj 2.85V≦ViN≦4.25V,10mA≦lout≦5A 45 120 uA Adjust Pin Current(Adjustable Version) Ripple F-120Hz,Cout=25uF(tan), Rejection Lout=5A,Vin-Vout=3V Adjust Pin Current Change lchange 10mA ≦lout≦5A 1.5V≦Vin-Vout≦6V Temperature Lout=10Ma, Stability Vin-Vout=1.5v Thermal Resistance θ JC Junction to case 60 dB 0.4 TO-252 12.5 TO-263 3 TO-220 3 10 uA 0.5 % O C/W Over Temperature OTP O 150 C Protection Note1: Line Regulation and Load Regulation in Table1 are tested under constant junction temperature. Note2: When load current varies between 0~5A and Vin-Vout ranges from 1.5V~6V at constant junction temperature, the parameter is satisfied the criterion in table. If temperature varies between 0°C≤TA≤80°C，it needs output current to be larger than 10mA to satisfy the criterion. Note3: Dropout Voltage is the voltage difference between the input and output pin when the input voltage is minimum to maintain the lowest spec output voltage. Note4: Minimum Load Current is defined as the minimum output current necessary to maintain regulation. Specified output accuracy can be met when the output current exceeds the minimum load current (10mA) and the dropout voltage (Vin-Vout) lies between 1.5V and 6V. VER 1.4 5 ACE1084 5A Bipolar Linear Regulator Block Diagram Detailed Description ACE1084 is a series of low dropout voltage three terminal regulators. Its circuit has a trimmed bandgap reference to ensure output voltage accuracy independent of temperature variance. On-chip thermal shutdown provides protection against overload and conditions as elevated ambient temperature. Its application circuitry requires minimum number of external components. Both fixed voltage and adjustable voltage versions need input and output capacitors to assure output voltage stability. Any desired output voltage from 1.25V to 10V can be achieved with adjustable version by assigning proper values to two external resistors in its application circuitry (as shown in Fig.4, as R1, R2 are the two external resistors.) Typical Application ACE1084 has an adjustable version and fixed versions, Fig.4 shows their typical application circuitry. A 10uF tan capacitor connected between input and GND as bypass capacitor and a 22uF tan capacitor between output and GND are recommended for all application. Using a bypass capacitor (CAdj) between the adjust terminal and ground can improve ripple rejection. The bypass capacitor prevents ripple from being amplified in case the output voltage is increased. The impedance of CAdj should be less than the resistance of R1 to prevent ripple from being amplified at any frequency. As R1 is normally in the range of 120Ω~200Ω, the value of CAdj should satisfy the following condition: VER 1.4 6 ACE1084 5A Bipolar Linear Regulator 1/(2π* FrequencyRipple *Cadj)<R1 A 10µF tan capacitor is recommended. ACE1084 ACE1084 Fig 3. Typical Application circuit of ACE1084 EXPLANATION The output voltage of adjustable version satisfies this followed equation: Vout= VRefx(1+R2/R1)+IAdj×R2. The second term IAdj×R2 can be ignored since the adjustable pin current IAdj (~ 50µA) is much less than the current through R1 (~ 4mA). The value of R1 is preferred in the range of 120Ω～200Ω and the total output current of the adjustable version of LC1084 needs to exceed 10mA to assure normal chip operation. VER 1.4 7 ACE1084 5A Bipolar Linear Regulator Typical Performance Characteristic lot(A) VER 1.4 8 ACE1084 5A Bipolar Linear Regulator Packing Information TO-252 VER 1.4 9 ACE1084 5A Bipolar Linear Regulator Packing Information TO-220 VER 1.4 10 ACE1084 5A Bipolar Linear Regulator Packing Information TO-263-3 VER 1.4 11 ACE1084 5A Bipolar Linear Regulator Packing Information TO-263-2 VER 1.4 12 ACE1084 5A Bipolar Linear Regulator Notes ACE does not assume any responsibility for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ACE Electronics Co., LTD. As sued herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes 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. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ACE Technology Co., LTD. http://www.ace-ele.com/ VER 1.4 13