IFX 80471SK V50 Infineon Technologies, IFX 80471SK V50 Datasheet
IFX 80471SK V50
Specifications of IFX 80471SK V50
Related parts for IFX 80471SK V50
IFX 80471SK V50 Summary of contents
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Step-Down DC/DC Controller IFX80471SKV IFX80471SKV50 Rev. 1.0, 2011-02- ...
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Table of Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Step-Down DC/DC Controller 1 Overview Features • Input voltage range from 60V • Output voltage: 5V fixed or adjustable • Output voltage accuracy: 3% • Output current up to 2.3A • 100% maximum duty cycle • Less ...
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Block Diagram VS VOUT Internal Power Supply and Biasing BDS FB CS COMP Voltage Reference Block IFX80471SKV Figure 1 Block Diagram Data Sheet ENA BLE PWM / PFM Regulator GND 4 IFX80471 Block Diagram SI- SI GND RO Battery ...
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Pin Configuration 3.1 Pin Assignment ENABLE / SI_ENABLE FB VOUT GND SYNC SI_GND Figure 2 Pin Configuration 3.2 Pin Definitions and Functions Pin Symbol Function 1 ENABLE Active-High enable input (only adjustable version, IFX80471SKV) for the device. The device ...
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Pin Symbol Function 4 GND Ground connection. Analog signal ground. 5 SYNC Input for external frequency synchronization. An external clock signal connected to this pin allows switching frequency synchronization of the device. The internal oscillator is clocked then by the ...
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General Product Characteristics 4.1 Absolute Maximum Ratings 1) Absolute Maximum Ratings all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Device supply input VS 4.1.1 Voltage 4.1.2 Current Current sense input CS ...
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Absolute Maximum Ratings (cont’d) all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Buck output voltage input VOUT 4.1.21 Voltage 4.1.22 Voltage 4.1.23 Current Compensation input COMP 4.1.24 Voltage 4.1.25 Current Reset output ...
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Functional Range [ Table 1 Pos. Parameter 4.2.1 Supply Voltage Range 4.2.2 Output voltage adjust range IFX80471SKV 4.2.3 Sense Resistor 4.2.4 PMOS, on+off delay 4.2.5 Buck driver supply capacitor 4.2.6 Buck inductance 4.2.7 Buck output capacitor 4.2.8 Junction Temperature ...
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Thermal Resistance Note: This thermal data was generated in accordance with JEDEC JESD51 standards. For more information www.jedec.org. Pos. Parameter 4.3.1 Junction to Soldering Point 1) 4.3.2 Junction to Ambient 1) Not subject to production test, specified ...
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Electrical Characteristics 5.1 Electrical Characteristics Electrical Characteristics: Power < < 48V; = -40 °C to +125 °C, all voltages with respect to ground, positive current flowing into pin VS j (unless otherwise specified) Pos. Parameter 1) ...
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Electrical Characteristics: Power (cont’ < < 48V; = -40 °C to +125 °C, all voltages with respect to ground, positive current flowing into pin VS j (unless otherwise specified) Pos. Parameter 5.1.8 Current consumption of VOUT 5.1.9 ...
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Electrical Characteristics: Power (cont’ < < 48V; = -40 °C to +125 °C, all voltages with respect to ground, positive current flowing into pin VS j (unless otherwise specified) Pos. Parameter 5.1.14 Buck output voltage adjust range ...
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Electrical Characteristics: Power (cont’ < < 48V; = -40 °C to +125 °C, all voltages with respect to ground, positive current flowing into pin VS j (unless otherwise specified) Pos. Parameter 5.1.25 Gate driver, gate voltage, rise ...
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Electrical Characteristics: Power (cont’ < < 48V; = -40 °C to +125 °C, all voltages with respect to ground, positive current flowing into pin VS j (unless otherwise specified) Pos. Parameter ENABLE Input 5.1.45 Enable ON-threshold 5.1.46 ...
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Typical Performance Characteristics Typical Performance Characteristics I Current Consumption versus VS T Junction Temperature (INH = ON µ -50 - Current Consumption versus Junction VS ...
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Internal oscillator frequency OSC versus Junction Temperature 380 f OSC kHz 370 360 350 340 330 320 310 -50 - Minimum on time (blanking) MIN versus Junction Temperature 350 t MIN ns 325 300 275 250 ...
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V Lower Reset threshold FB,RT versus Junction Temperature 1.14 V FB,RT V 1.13 1.12 1.11 1.10 1.09 1.08 1.07 -50 - resistance of SI_GND switch versus Junction Temperature 280 R SW Ω 240 200 160 120 80 ...
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Output voltage vs. Load Current (IFX80471SKV) 1.4 V OUT V OUT,nom 1.2 1.0 0.8 0.6 0.4 0 0.25 0.5 0.75 Data Sheet IFX80471SKV R = 50mΩ SENSE V = 13.5V VS App. Circuit Fig. 5 1.0 1.25 1.5 ...
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Detailed Circuit Description In the following, the internal blocks of the IFX80471 are described in more detail. For selecting external components please refer to the section 6.1 PFM/PWM Step-down regulator To meet also high requirements in terms of current ...
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Battery voltage sense To detect undervoltage conditions at the battery a sense comparator block is available within the IFX80471. The voltage at the SI input is compared to an internal reference of typ. 1.25V. The output of the comparator ...
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Application Information Note: The following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device. 7.1 ...
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Battery sense comparator - voltage divider The formula to calculate the resistor divider for the sense comparator is basically the same as for the feedback divider in section before. With the selected resistor R lower sense threshold V the ...
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The drop- or dropout voltage is defined as the difference between the input and output voltage levels when the input is low enough to drop the output out of regulation. Dropout depends on the MOSFET drain-to-source on- resistance, the current-sense ...
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The inductance value determines together with the input voltage, the output voltage and the switching frequency the current ripple which occurs during normal operation of the step down converter. This current ripple is ...
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From the formula it is recognized that the ESR has a big influence in the total ripple at the output, so low ESR tantalum or ceramic capacitors are recommended for the application (recommended range: 50mOhm to 150mOhm). One other important ...
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Components recommendation - Overview Device Values / Remarks C 100μF, 60V IN1 C 220nF, 60V IN2 L1 47μH, 1.6A, 145mΩ 47μH, 3.5A, 47mΩ 47μH, 3.8A, 110mΩ 68μH, 3.5A, 130mΩ 47μH, 4.0A, 97mΩ M1 60V, 3.44A, 130mΩ, NL 60V, 2.9A, ...
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R = SEN 47mΩ IN1 C = 100 μ 220 nF 11 BDS IN2 IFX80471SKV 400kΩ 220nF SI_GND ENABLE SI 2 ...
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Package Outlines 1.27 +0.10 2) 0.41 -0.06 0 8.75 -0.2 Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Lead width can be 0.61 max. in dambar area Figure ...
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Revision History Revision Date Changes 1.0 2011-02-07 Data Sheet - Initial Release Data Sheet 29 IFX80471 Revision History Rev. 1.0, 2011-02-07 ...
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... The Infineon Technologies component described in this Data Sheet may be used in life-support devices or systems and/or automotive, aviation and aerospace applications or systems only with the express written approval of Infineon Technologies failure of such components can reasonably be expected to cause the failure of that life-support automotive, aviation and aerospace device or system or to affect the safety or effectiveness of that device or system ...