IFX1963S/TR

IFX1963 3A Fast-Response LDO Regulator General Description The IFX1963 is a high-current, low-cost, low-dropout voltage regulator which uses Micrel's proprietary Super βeta PNP® process with a PNP pass element. The 3A LDO regulator features 450mV (full load) dropout voltage and very low ground current. Designed for high-current loads, these devices also find applications in lower current, low dropout-critical systems, where their dropout voltage and ground current values are important attributes. Along with a total accuracy of ±2% (over temperature, line and load regulation) the regulator features very-fast transient recovery from input voltage surges and output load current changes. The IFX1963 has an adjustable output which can be set by two external resistors to a voltage between 1.24V to 15V. In addition, the device is fully protected against over current faults, reversed input polarity, reversed lead insertion, and overtemperature operation. A TTL logic enable (EN) pin is available in the IFX1963 to shutdown the regulator. When not used, the device can be set to continuous operation by connecting EN to the input (IN). The IFX1963 is available in the standard and 5-pin TO-263 and TO-252 packages with an operating junction temperature range of −40°C to +125°C. Features  High-current capability  Extremely-fast transient response  − 3A over full temperature range  Zero-current shutdown mode  Low-dropout voltage of 450mV at full load  Error flag signals output out-of-regulation  Low ground current  Adjustable output voltage  Accurate 1% guaranteed tolerance  Packages: TO-263-5L and TO-252-5L Applications  Processor peripheral and I/O supplies  Battery-powered equipment  High-efficiency “Green” computer systems  PC add-in cards  Automotive electronics  High-efficiency lost-regulator for switching  High-efficiency linear lower supplies supply ORDERING INFORMATION DEVICE Package Type MARKING Packing Packing Qty IFX1963T TO220-5L IFX1963 TUBE 1000pcs/box IFX1963S/TR TO263-5L IFX1963 REEL 500pcs/reel IFX1963MDT/TR TO252-5L IFX1963 REEL 2000pcs/reel http://www.hgsemi.com.cn 1 / 15 2022 AUGUST IFX1963 Typical Application R1 VOUT=1.242×(R2 +1) IFX1963 Adjustable Output Regulator Pin Configuration ADJ OUT GND IN EN TO263-5 TO220-5 ADJ OUT GND IN EN TO252-5 Pin Description Pin Number Pin Number TO-263 TO-252 1 1 EN Enable (Input): Active-high CMOS compatible control input. Do not float. 2 2 IN INPUT: Unregulated input, +2.8V to +16V maximum 3, TAB 3, TAB GND GND: TAB is also connected internally to the IC’s ground on both packages. 4 4 OUT OUTPUT: The regulator output voltage 5 5 ADJ Feedback Voltage: 1.24V feedback from external resistor divider. http://www.hgsemi.com.cn Pin Name Pin Name 2 / 15 2022 AUGUST IFX1963 Absolute Maximum Ratings(1) Condition Min Max Input Supply Voltage(VIN)(1) -20V +20V Enable Input Voltage(VEN) -0.3V VIN - 260°C Lead Temperature (soldering 5sec.) Power Dissipation Intemally Limited Storage Temperature Range -65°C +150°C - - Operating Junction Temperature -40 +125°C Operating Input Voltage 3V 16V ESD Rating ping(3) Operating Ratings(2) Package Thermal Resistance TO-263 (θJC) 3°C/W Electrical Characteristics(4) VIN = 4.2V; IOUT = 100mA; TA = 25°C, bold values indicate -40°C≤ TJ ≤ +125°C, unless noted. Parameter Condition Min. Typ. Max. Units 2 % Output Voltage Output Voltage Accuracy 100mA ≤ IOUT ≤ 3A, (VOUT + 1V) ≤ VIN ≤ 16V -2 Line Regulation IOUT = 100mA, (VOUT + 1V) ≤ VIN ≤ 16V 0.1 0.5 % Load Regulation VIN = VOUT + 1V, 100mA ≤ IOUT ≤ 3A 0.2 1 % IOUT = 100mA 80 200 IOUT = 750mA 220 IOUT = 1.5A 275 IOUT = 3A 450 800 IOUT = 750mA, VIN = VOUT + 1V 5 20 IOUT = 1.5A 15 IOUT = 3A 60 VIN = 0.5V less than specified VOUT×IOUT = 10mA 2 ∆VOUT = -1% (6) Dropout Voltage mV Ground Current Ground Current IGRNDDO Ground Pin Current @ Dropout Current Limit en, Output Noise Voltage (10Hz to 100kHz IL = 100mA VOUT = 0V(7) 3 CL = 10µF 400 CL = 33 µF 260 Ground Pin Current in Shutdown Input Voltage VIN = 16V http://www.hgsemi.com.cn 4 3 / 15 32 mA 150 A µV (rms) µA 2022 AUGUST IFX1963 Electrical Characteristics(4) (Continued) VIN = 4.2V; IOUT = 100mA; TA = 25°C, bold values indicate -40°C≤ TJ ≤ +125°C, unless noted. Reference Reference Voltage (8) 1.215 1.267 40 Adjust Pin Bias Current 120 V nA ENABLE Input Input Logic Voltage Low (OFF) High (ON) VEN = 8V 0.8 2.4 15 2 VEN = 0.8V Regulator Output Current in Shutdown (10) 30 75 Enable Pin Input Current V µA 4 10 20 µA Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 4. Specification for packaged product only 5. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature change. 6. Dropout voltage is defined as the input-to-output differential when output voltage drops to 99% of its normal value with VOUT + 1V applied to VIN. 7. VIN =VOUT (nominal) + 1V. For example, use VIN = 4.3V for a 3.3Vregulator or use 6V for a 5V regulator. Employ pulse testing procedure for current limit. 8. VREF ≤ VOUT ≤ VIN -1, 3V≤ VOUT ≤16V, 10mA ≤ IL ≤ IFL, TJ ≤ TJmax. 9. Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 250mA load pulse at VIN =16V (a 4W pulse) for T= 10ms. 10. VEN≤0.8V, VIN≤16V and VOUT = 0V. http://www.hgsemi.com.cn 4 / 15 2022 AUGUST IFX1963 Typical Characteristics http://www.hgsemi.com.cn 5 / 15 2022 AUGUST IFX1963 Typical Characteristics (Continued) http://www.hgsemi.com.cn 6 / 15 2022 AUGUST IFX1963 Typical Characteristics (Continued) http://www.hgsemi.com.cn 7 / 15 2022 AUGUST IFX1963 Functional Characteristics IFX1963 Line Transient Response with 3A Load,100µF Output Capacitance Figure 2. IFX1963 Load Transient Response Test Circuit IFX1963 Line Transient Response with 3A IFX1963 Load Transient Response http://www.hgsemi.com.cn Load,100µF Output Capacitance 8 / 15 2022 AUGUST IFX1963 Functional Diagram IFX1963 Application Information The IFX1963 is a high-performance, low-dropout voltage regulator suitable for all moderate to high-current voltage regulation applications. Its 450mV typical dropout voltage at full load makes it especially valuable in battery-powered systems and as high efficiency noise filters in “post-regulator” applications. Unlike older NPNpass transistor designs, where the minimum dropout voltage is limited by the base-emitter voltage drop and collector-emitter saturation voltage, dropout performance of the PNP output is limited merely by the low VCE saturation voltage. A trade-off for the low-dropout voltage is a varying base driver requirement. But Micrel’s Super ßeta PNP® process reduces this drive requirement to merely 1% of the load current. The IFX1963 regulator is fully protected from damage due to fault conditions. Current limiting is linear; output current under overload conditions is constant. Thermal shutdown disables the device when the die temperature exceeds the 125°C maximum safe operating temperature. The output structure of the regulators allows voltages in excess of the desired output voltage to be applied without reverse current flow. The IFX1963 offer a logic level ON/OFF control: when disabled, the devices draw nearly zero current. Figure 3. Linear Regulators Require Only Two Capacitors for Operation http://www.hgsemi.com.cn 9 / 15 2022 AUGUST IFX1963 Thermal Design Linear regulators are simple to use. The most complicated set of design parameters to consider are thermal characteristics. Thermal design requires the following application-specific parameters:  Maximum ambient temperature, TA  Output Current, IOUT  Output Voltage, VOUT  Input Voltage, VIN First, we calculate the power dissipation of the regulator from these numbers and the device parameters from this datasheet: PD=IOUT(1.02VIN-VOUT) Where the ground current is approximated by 2% of IOUT. Then the heat sink thermal resistance is determined with this formula: TJMAX−TA θSA= PD - (θJC+θCS) where: TJMAX ≤ 125°C and θCS is between 0 and 2°C/W. The heat sink may be significantly reduced in applications where the minimum input voltage is known and is large compared to the dropout voltage. A series input resistor can be used to drop excessive voltage and distribute the heat between this resistor and the regulator. The low-dropout properties of Micrel Super βeta PNP® regulators allow very significant reductions in regulator power dissipation and the associated heat sink without compromising performance. When this technique is employed, a capacitor of at least 0.1µF is needed directly between the input and regulator ground. With no heat sink in the application, calculate the junction temperature to determine the maximum power dissipation that will be allowed before exceeding the maximum junction temperature of the IFX1963. The maximum power allowed can be calculated using the thermal resistance (θJA) of the D-Pak (TO252) adhering to the following criteria for the PCB design: 2 oz. copper and 100mm2 copper area for the IFX1963. For example, given an expected maximum ambient temperature (TA) of 75°C with VIN = 3.3V, VOUT = 2.5V, and IOUT = 1.5A, first calculate the expected PD using: PD=(3.3V-2.5V)×3A-(3.3V)×（0.016A）=2.3472W Next, calcualte the junction temperature for the expected power dissipation: TJ=(θJA×PD)+TA=(35°C/W×2.3472W)+75°C=157.15°C Now determine the maximum power dissipation allowed that would not exceed the IC’s maximum junction temperature (125°C) without the use of a heat sink by: PD(MAX)=(TJ(MAX)-TA)/θJA =(1.25°C-75°C)/(35°C/W) =1.428W http://www.hgsemi.com.cn 10 / 15 2022 AUGUST IFX1963 Capacitor Requirements For stability and minimum output noise, a capacitor on the regulator output is necessary. The value of this capacitor is dependent upon the output current; lower currents allow smaller capacitors. The IFX1963 is stable with a 10μF capacitor at full load. This capacitor need not be an expensive low-ESR type; aluminum electrolytics are adequate. In fact, extremely low-ESR capacitors may contribute to instability. Tantalum capacitors are recommended for systems where fast load transient response is important. When the regulator is powered from a source with high AC impedance, a 0.1µF capacitor connected between input and GND is recommended. Transient Response and 5V to 3.3V Conversion The IFX1963 has excellent response to variations in input voltage and load current. By virtue of its low dropout voltage, the device does not saturate into dropout as readily as similar NPN-based designs. A 3.3V output Micrel LDO will maintain full speed and performance with an input supply as low as 4.2V, and will stillprovide some regulation with supplies down to 3.8V, unlike NPN devices that require 5.1V or more for good performance and become nothing more than a resistor under 4.6V of input. Micrel’s PNP regulators provide superior performance in “5V to 3.3V” conversion applications than NPN regulators, especially when all tolerances are considered. Minimum Load Current The IFX1963 regulator operates within a specified load range. If the output current is too small, leakage currents dominate and the output voltage rises. A minimum load current of 10mA is necessary for proper regulation and to swamp any expected leakage current across the operating temperature range. For best performance the total resistance (R1+R2) should be small enough to pass the minimum regulator load current of 10mA. Adjustable Regulator Design The output voltage can be programmed anywhere between 1.25V and the 15V. Two resistors are used. The resistor values are calculated by: VOUT R1=R2×( 1.240 -1) where VOUT is the desired output voltage. http://www.hgsemi.com.cn 11 / 15 2022 AUGUST IFX1963 Figure 4 shows component definition. Applications with widely varying load currents may scale the resistors to draw the minimum load current required for proper operation (see “Minimum Load Current” section). IFX1963 Figure 4. Adjustable Regulator with Resistors Enable Input IFX1963 features an enable (EN) input that allows ON/OFF control of the device. Special design allows “zero” current drain when the device is disabled—only microamperes of leakage current flows. The EN input has TTL/CMOS compatible thresholds for simple interfacing with logic, or may be directly tied to VIN. Enabling the regulator requires approximately 20µA of current into the EN pin. http://www.hgsemi.com.cn 12 / 15 2022 AUGUST IFX1963 Physical Dimensions TO220-5 Dimensions In Millimeters(TO220-5) A A1 B D D1 D2 a d Min： 4.52 1.25 10 28.6 22.4 8.69 1.68 0.33 Max： 4.62 1.29 10.3 28.8 22.6 8.79 1.77 0.42 Symbol： b 1.70BSC TO263-5 D C C1 B a 0,25 b Dimensions In Millimeters(TO263-5) A A1 B C C1 D E a Min： 4.45 1.22 10 13.7 8.40 1.90 0 0.71 Max： 4.62 1.32 10.4 14.6 8.90 2.10 0.20 0.97 Symbol： http://www.hgsemi.com.cn 13 / 15 b 1.70BSC 2022 AUGUST IFX1963 TO252-5 B B1 A C C1 A1 D E b a Dimensions In Millimeters(TO252-5) A A1 B C C1 D E a Min： 2.19 0.45 6.30 9.40 5.30 1.40 0.05 0.45 Max： 2.38 0.55 6.70 10.2 570 1.60 0.25 0.60 Symbol： http://www.hgsemi.com.cn 14 / 15 b B1 1.27BSC 5.30BSC 2022 AUGUST IFX1963 IMPORTANT STATEMENT: Huaguan Semiconductor Co,Ltd. reserves the right to change the products and services provided without notice. Customers should obtain the latest relevant information before ordering, and verify the timeliness and accuracy of this information. Customers are responsible for complying with safety standards and taking safety measures when using our products for system design and machine manufacturing to avoid potential risks that may result in personal injury or property damage. Our products are not licensed for applications in life support, military, aerospace, etc., so we do not bear the onsequences of the application of these products in these fields. Huaguan Semiconductor Co,Ltd. the performance of the semiconductor products produced by the company can reach the performance indicators that can be applied at the time of sales. The use of testing and other quality control technologies is limite d to the quality assurance scope of Huaguan semiconductor. Not all parameters of each device need to be tested. The above documents are for reference only, and all are subject to the physical parameters. Our documentation is only permitted to be copied without any tampering with the content, so we do not accept any responsibility or liability for the altered documents. http://www.hgsemi.com.cn 15 / 15 2022 AUGUST