isl9440b Intersil Corporation, isl9440b Datasheet
isl9440b
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isl9440b Summary of contents
Page 1
... Data Sheet Triple Step-Down PWM and Single Linear Controller with Programmable Soft-Start The ISL9440B and ISL9440C are quad-output synchronous buck controllers that integrate three PWM controllers and one low drop-out linear regulator controller, which are full featured and designed to provide multi-rail power for use in products ...
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... NUMBER PART RANGE (Note) MARKING (°C) ISL9440BIRZ* 9440B IRZ - 5x5 QFN L32.5x5B ISL9440CIRZ* 9440C IRZ - 5x5 QFN L32.5x5B *Add “-T” for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ ...
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Block Diagram BOOT1 VCC_5V UGATE1 PHASE1 ADAPTIVE DEAD-TIME VCC_5V V/I SAMPLE TIMING LGATE1 PGND 0.8V REFERENCE + LDOFB FB1 18.5pF 180kΩ 1400kΩ _ 16kΩ 0.8V REF ERROR AMP 1 ...
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... Typical Application - ISL9440B CIN3 CIN4 10µF 10µ 0.22µF RJK0305DPB VOUT1 + 5.0V, 15A L1 2.2µ 330µF 330µF Q2 RJK0301DPB CFF1 R1 105k 220pF R2 20k VOUT2 +3.3V Q4 Si4423DY VOUT4 +2.5V, 800mA R9 21.5k + C12 100µF R10 10k R13 150k R14 150k R15 150k C 4 ISL9440B, ISL9440C ...
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... CP1 R2 102k VOUT2 4700pF +3.3V Q4 FDS8433A VOUT4 +2.5V, 800mA R8 21. 100µF R9 10k R15 100k R16 100k R17 200k SS3 5 ISL9440B, ISL9440C CINF 1µF VIN VCC_5V 4 3 BOOT1 BOOT2 31 26 UGATE1 UGATE2 30 27 PHASE2 PHASE1 ISEN2 R4 ISEN1 1 24 1.82k LGATE1 LGATE2 29 ...
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... DC Gain (Note 6) Gain-BW Product (Note 6) Slew Rate (Note 6) PWM REGULATOR Switching Frequency (ISL9440B) Maximum Duty Cycle (ISL9440B) Minimum Duty Cycle (ISL9440B) Switching Frequency (ISL9440C) 6 ISL9440B, ISL9440C Thermal Information Thermal Resistance (Typical Notes QFN Package ...
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... PGOOD Lower Threshold, PWM 1, 2 and 3 PGOOD for Linear Controller PGOOD Low Level Voltage PGOOD Leakage Current 7 ISL9440B, ISL9440C = 5.6V to 24V, or VCC_5V = 5V ±10%, C_VCC_5V = 4.7µ +25°C; Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise A TEST CONDITIONS ...
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... Limits established by characterization and are not production tested. 7. Check Note 3 for VCC_5V and VIN configurations at 5V ±10% input applications. ISL9440B, ISL9440C’s PGOOD signal will fall LOW when VIN pin voltage drops below 5.55V (TYP), which results from the early warning detection on VIN pin voltage. ...
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... Use this pin to power the device with an external supply voltage with a range of 5.6V to 24V. For 5V ±10% operation, connect this pin to VCC_5V. For ISL9440B and ISL9440C, the voltage on this pin is monitored for early warning function. If the voltage on this pin drop below 5.55V, the PGOOD will be pulled low. RST will be low after PGOOD toggles to low for 5.5µ ...
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... Typical Performance Curves (Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board, V 5.05 5.04 5.03 VIN = 6V VIN = 12V 5.02 5.01 5.00 4.99 4.98 4.97 4.96 4. LOAD CURRENT (A) FIGURE 2. PWM1 LOAD REGULATION 10 ISL9440B, ISL9440C 5.5V FALLING 1-4 OUT OF 7 OUT REGULATION 5.5V RISING 5.5V RISING 1-4 IN REGULATION 5 V 1-4 IN REGULATION OUT OUT ...
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... Typical Performance Curves (Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board, V 3.36 3. 19V IN 3.34 3.33 3. 3.31 3. LOAD CURRENT (A) FIGURE 4. PWM2 LOAD REGULATION 12.10 12. 23V IN 12.06 12.04 12.02 12.00 11. 15V IN 11.96 11.94 11.92 11. LOAD CURRENT (A) FIGURE 6. PWM3 LOAD REGULATION 5. 24V IN 5. 5.0V IN 4.75 4. 4.5V IN 4.25 4. LOAD CURRENT (A) FIGURE 8 ...
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... Typical Performance Curves (Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board, V 2.0 1 12V IN 1.4 1.1 0.8 0 VEN/SS (V) FIGURE 10. SOFT-START CURRENT vs VEN/SS 120 100 (V) IN FIGURE 12. SHUTDOWN CURRENT vs V FLOATING) PWM1, 10V/DIV PWM2, 10V/DIV PWM3, 10V/DIV FIGURE 14. PHASE NODE PWM WAVEFORMS, V ...
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... Typical Performance Curves (Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board, V PGOOD, 5.0V/DIV V , 2.0V/DIV OUT1 V , 2.0V/DIV OUT2 FIGURE 16. PGOOD RISING AFTER START UP FIGURE 18. PGOOD RISING TO RST RISING V (AC), 50mV/DIV OUT1 FIGURE 20. PWM1 OUTPUT RIPPLE UNDER MAX LOAD (V = 23V 15A, I ...
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... Typical Performance Curves (Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board (AC), 50mV/DIV OUT2 FIGURE 22. PWM2 OUTPUT RIPPLE UNDER MAX LOAD (V = 23V 15A BANDWIDTH) V (AC), 50mV/DIV OUT3 FIGURE 24. PWM3 OUTPUT RIPPLE UNDER MAX LOAD (V = 23V 15A, I ...
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... Typical Performance Curves (Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board 24V IN 2. 12V IN 2.53 2.52 2.51 2. 4.5V IN 2.49 2.48 2.47 2.46 2.45 0 0.2 0.4 LOAD CURRENT (A) FIGURE 28. LDO LOAD REGULATION 1.8 1.7 VSS = 0V 12V IN 1.6 1.5 1.4 1.3 VSS = 2V 12V IN 1.2 1.1 1.0 0.9 0.8 -50 - TEMPERATURE (°C) FIGURE 30. SOFT-START CURRENT vs TEMPERATURE 5.25 5. 12.0V/0A LOAD IN 5.15 5.10 5. 19.0V/0A LOAD IN 5 ...
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... Typical Performance Curves (Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board ISL9440B, ISL9440C (Continued) = 19V Unless Otherwise Noted). IN 808 804 800 796 792 - TEMPERATURE (°C) FIGURE 34. REFERENCE VOLTAGE vs TEMPERATURE 100 FN6799.0 January 15, 2009 ...
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... V = 16VDC LOAD CURRENT (A) FIGURE 37. PWM3 EFFICIENCY vs LOAD (V FOR UPPER MOSFET AND LOWER MOSFET) 17 ISL9440B, ISL9440C = 12V Unless Otherwise Noted). IN 100 1.0V, IRF7907 FIGURE 36. PWM2 EFFICIENCY vs LOAD (V O 660 630 600 570 540 5.0V, IRF7907 ...
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... IN Enable Signals and Soft-Start Operation The typical applications for the ISL9440B and ISL9440C are using programmable analog soft-start. The soft-start time can be set by the value of the soft-start capacitors connected from the EN/SSx pins to the ground. The start-up in-rush current can be alleviated by adjusting the soft starting time ...
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... The reason is that V and VCC_5V Pin should be tied IN together for this input application. The early warning function will pull PGOOD and RST low for ISL9440B and ISL9440C. The input voltage range can be effectively limited by the available maximum duty cycle (D MAX and D = 86% for ISL9440C), as shown in Equation 3 ...
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... PWM cycles. If the overvoltage condition has not been corrected in 2 cycles and the output voltage is above 118% of the nominal output voltage, the ISL9440B and ISL9440C will turn off both the upper MOSFET and the lower MOSFET. The ISL9440B and ISL9440C will enter hiccup mode until the output voltage return to 110% of the nominal output voltage ...
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... Please refer to “Output Capacitor Selection” on page 23 and “Input Capacitor Selection” on page 24 for further details. 21 ISL9440B, ISL9440C is load capacitance. Linear Regulator The linear regulator controller is a trans-conductance amplifier with a nominal gain of 2A/V. The N-Channel MOSFET output buffer can sink a minimum of 50mA. ...
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... PC board layout minimizes the magnitude of these voltage spikes. There are three sets of critical components in a DC/DC converter using the ISL9440B and ISL9440C: The controller, the switching power components and the small signal components. The switching power components are the most ...
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... One of the parameters limiting the converter’s response to a load transient is the time required for the inductor current to slew to its new level. The ISL9440B and ISL9440C will provide either 0% or maximum duty cycle in response to a load transient. The response time is the time interval required to slew the inductor current from an initial current value to the load current level ...
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... The recommended output capacitor value for the ISL9440B and ISL9440C is between 150µF to 680µF, to meet stability criteria with external compensation. Use of aluminum electrolytic (POSCAP) or tantalum type capacitors is recommended. Use of low ESR ceramic capacitors is possible but would take more rigorous loop analysis to ensure stability ...
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... L32.5x5B 32 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 11/07 5.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( 4. 80 TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 25 ISL9440B, ISL9440C ± 28X (32X 32X 0 . 60) NOTES: 1. Dimensions are in millimeters. Dimensions ...