Advanced Power Electronics Corp. APE1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Features • • • • • General Description APE1086 is a low dropout positive adjustable or fixed-mode regulator with minimum of 1.5A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply. APE1086 is also well suited for other applications such as VGA cards. APE1086 is guaranteed to have <1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.25V to 5.0V with 4.7 to 12V input supply by different output voltage. 3-Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V, 3.3V, 5.0V 1.4V Maximum Dropout at Full Load Current Fast Transient Response Built-in Thermal Shutdown Output Current Limiting RoHS Compliant Ordering Information APE1086 X Low Dropout Regulator X Package Vout H : TO252-3L S : TO263-3L P : TO220-3L Blank : Adj 15 = 1.5V 18 = 1.8V 25 = 2.5V 33 = 3.3V 50 = 5.0V Typical Application Adjustable Regulator 5V to 3.3V Fixed Mode Regulator 5V 5V C1 100uF C1 100uF Vin Vout GND Tab is Vout Vin 3.3V/1.5A C2 100uF VOUT=Vref × (1+R2/R1) Vout Adj 2.5V/1.5A R1 121 Ω R2 121 Ω C2 100uF Tab is Vout Note: Vo = VREF ∗ (1+ R2 ) R1 This datasheet contains new product information. Advanced Power Electronics Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. 200313072-1/6 Advanced Power Electronics Corp. APE1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Block Diagram Vin 3 2 Vout 1 Adj (GND) + + 1.25V － + CURRENT LIMIT + － THERMAL SHUTDOWN Connection Diagram 3 PIN TO263 FRONT VIEW 2 FRONT VIEW FRONT VIEW 2 Vout Adj (GND) 1 3 PIN TO220 3 Vin 3 3 PIN TO252 1 Vin Vout Vin 2 Vout 1 Adj (GND) Adj (GND) Tab is Vout Tab is Vout 3 Tab is Vout Pin Descriptions NAME I/O Adj (GND) Vout Vin O I PIN # FUNCTION 1 Adjustable (Ground only for fixed mode) 2 The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability. 3 The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be 1.4V higher than Vout in order for the device to regulate properly. 2/6 Advanced Power Electronics Corp. APE1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Absolute Maximum Ratings Symbol Vin PD TST TOP Parameter DC Supply Voltage Power Dissipation Storage Temperature Operating Junction Temperature Range Electrical Characteristics PARAMETER APE1086-Adj APE1086-1.5 Output Voltage APE1086-1.8 APE1086-2.5 APE1086-3.3 APE1086-5.0 APE1086-XX APE1086-Adj APE1086-1.5 APE1086-1.8 Load Regulation APE1086-2.5 APE1086-3.3 APE1086-5.0 Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Thermal Regulation Ripple Rejection RMS Noise (% of VOUT) Temperature Stability Thermal Resistance Junction-to-Ambient (No heat sink ;No air flow) Thermal Resistance Junction-to-Case (Under Operating Conditions) CONDITIONS Reference Voltage Line Regulation Rating Unit -0.3 to 12 V Internally Limited o -65 to +150 C o 0 to +150 C o TJ=25 C,(VIN-VOUT)=1.5V,IO=10mA o IOUT = 10mA, TJ = 25 C, 3V≦VIN≦12V o IOUT = 10mA, TJ = 25 C, 3.3V≦VIN≦ 12V IOUT = 10mA, TJ = 25oC, 4V≦VIN≦12V IOUT = 10mA, TJ = 25oC, 4.8V≦VIN≦ 12V o IOUT = 10mA, TJ = 25 C, 6.5V≦VIN≦ 12V I O=10mA, VOUT+1.5V<VIN<12V VIN=3.3V, 0mA<Io<1.5A, TJ=25oC (Note 1, 2) VIN=3V, 0mA<Io<1.5A, TJ=25oC (Note 1, 2) o VIN=3.3V, 0mA<Io<1.5A, TJ=25 C (Note 1, 2) o VIN=4V, 0mA<Io<1.5A, TJ=25 C (Note 1, 2) o VIN = 5V, 0≦IOUT≦1.5A, TJ=25 C , o TJ=25 C (Note 1.2) o VIN = 8V, 0≦IOUT≦1.5A, TJ=25 C , o TJ=25 C (Note 1.2) APE1086-Adj/-2.5 IOUT = 1.5A, ∆VOUT=1%VOUT /-3.3/-3.6/-5.0 APE1086-Adj/-2.5 (VIN-VOUT) = 5V /-3.3/-3.6/-5.0 o o 0 C≦Tj≦125 C APE1086-XX TA=25℃, 30ms pulse F=120Hz,COUT=25uF Tantalum, IOUT=1.5A APE1086-XX VIN=VOUT+3V 10Hz ≤ f ≤ 10KHz IO=10mA TO-252 TO-263 TO-220 TO-252: Control Circuitry/Power Transistor TO-263: Control Circuitry/Power Transistor TO-220: Control Circuitry/Power Transistor MIN TYP MAX UNIT 1.225 1.470 1.250 1.500 1.275 1.530 V V 1.764 1.800 1.836 V 2.450 2.500 2.550 V 3.235 3.300 3.365 V 4.900 5.000 5.100 V - 0.2 0.5 % - - 1 % - 12 15 mV - 15 18 mV - 20 25 mV - 26 33 mV - 40 50 mV - 1.3 1.4 V 1. 6 - - A - 5 0.008 10 0.04 mA %/W - 60 0.003 0.5 101 83 86 15 0.65/2.7 0.65/2.7 70 - dB % % - - O C/W - O C/W Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18” from the package. Note 2:Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference in input and output and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Note 3:Quiescent current is defined as the minimum output current required in maintaining regulation. At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA. 3/6 Advanced Power Electronics Corp. APE1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Functional Description Introduction The APE1086 adjustable or fixed-mode Low Dropout (LDO) regulator is a 3 terminal device which can easily be programmed by internal mask change to any voltages within the range of 1.25V to Vin-1.4V. The APE1086 only needs 1.4V differential between Vin and Vout to maintain output regulation. In addition, the output voltage tolerances are also extremely tight and they include the transient response as part of the specification. For example, Intel VRE specification calls for a total of +/- 100mV including initial tolerance, load regulation and 0 to 1.5A load step. The APE1086 is specifically designed to meet the fast current transient needs as well as providing an accurate initial voltage, reducing the overall system cost with the need for fewer output capacitors. Load Regulation Since the APE1086 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the load. But it can supply good load regulation by internal feedback bypass the external loss such as adjustable mode. make the regulator stable. For most applications a minimum of 10uF aluminum electrolytic capacitor insures both stability and good transient response. Thermal Design The APE1086 incorporates an internal thermal shutdown that protects the device when the junction temperature exceeds the maximum allowable junction temperature. Although this device can operate with junction temperatures in the range of 150oC, it is recommended that the selected heat sink be chosen such that during maximum continuous load operation the junction temperature is kept below the temperature. Layout Consideration The output capacitors must be located as close to the Vout terminal of the device as possible. It is recommended to use a section of a layer of the PC board as a plane to connect the Vout pin to the output capacitors to prevent any high frequency oscillation that may result due to excessive trace inductance. Stability The APE1086 requires the use of an output capacitor as part of the frequency compensation in order to 4/6 Advanced Power Electronics Corp. APE1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Typical Performance Characteristics 0.20 2. 0 Output Voltage Deviation (%) 1. 8 1. 6 Dropout Voltage (V) 1. 4 1. 2 0 I load=1.5A -0.20 Tj = 25 oC 1. 0 -0.40 0. 8 Tj = 125 oC 0. 6 -0.80 0. 4 0. 2 0 0 0.25 0.5 0.75 Output Current (A) 1.0 1.25 -1 1.5 -25 Dropout Voltage vs Output Current 0 25 50 Temperature ( oC) 75 100 125 Load Regulation vs Temperature 2 1 0.8 1 0. 5 0 -0.5 -1 -1.5 -2 -50 -25 0 25 50 Temperature ( oC) 75 100 125 150 Output Voltage Deviation (%) Output Voltage Change (%) 1.5 0.6 0.4 0.2 0 2 4 7.5 Cin=1uF Cout=10uF Tantalum 6.5 5.5 40 20 0 -20 -40 0 20 40 60 80 100 120 140 160 180 200 TIME (us) Line Transient Response Load Current (A) Output Voltage Deviation (mV) Output Voltage Deviation (mV) Input Voltage (V) Percent Change in Output Voltage vs Temperature 6 8 10 Input Voltage (V) 12 Line Regulation 30 Cin=1uF Cout=10uF Tantalum Preload=100mA 20 10 0 -10 -20 2 1 0 -1 0 10 20 30 40 50 TIME (us) 60 70 80 90 100 Load Transient Response 5/6 Advanced Power Electronics Corp. APE1086 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator Marking Information ( Top View) 1086-VV Part Number Logo 1086 for ADJ 1086-VV : 15 for 1.5V 18 for 1.8V 25 for 2.5V 33 for 3.3V 50 for 5V Y WW SSS Y: Year -"1": 2001 ~ WW: Xth week - 01~52 SSS: Sequence - 001~ (TO252-3L) ( Top View) Part Number Logo 1086-VV : 15 for 1.5V 18 for 1.8V 25 for 2.5V 33 for 3.3V 50 for 5V Blank for ADJ 1086-VV Y WW SSS Y: Year -"1": 2001 ~ WW: Xth week - 01~52 SSS: Sequence - 001~ (TO220-3L / TO263-3L) 6/6