ISL8014 INTERSIL [Intersil Corporation], ISL8014 Datasheet
ISL8014
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ISL8014 Summary of contents
Page 1
... A power good output voltage monitor indicates when the output is in regulation. The ISL8014 is offered in a space saving 4x4 QFN lead free package with exposed pad lead frames for low thermal. The ISL8014 offers a 1ms Power Good (PG) timer at power-up ...
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... 22µF 2 ISL8014 Pinout PACKAGE PKG. (Pb-Free) DWG. # VIN LX VDD PGND ISL8014 EN R1 VFB 100k PG SYNCH SGND FIGURE 1. TYPICAL APPLICATION DIAGRAM ISL8014 (16 LD QFN) TOP VIEW VIN 1 12 PGND VIN 2 11 PGND 3 10 VDD SGND SYNCH 4 9 SGND ...
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... Block Diagram SOFT Soft START SHUTDOWN EN 0.8V BANDGAP 3pF VFB 6k 0.864V 0.736V PG SGND 0.2V 3 ISL8014 27pF 390k - OSCILLATOR + + EAMP COMP - - + SLOPE Slope COMP - + + OCP + - + SKIP - 1ms DELAY - SCP + FIGURE 2. FUNCTIONAL BLOCK DIAGRAM SYNCH SHUTDOWN VIN PWM/PFM LOGIC LX CONTROLLER PROTECTION DRIVER PGND + + CSA - 1.4V - 0.5V ZERO-CROSS SENSING FN6576 ...
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... Peak Skip Limit COMPENSATION Error Amplifier Trans-Conductance Trans-Resistance LX P-Channel MOSFET ON-Resistance 4 ISL8014 Thermal Information Thermal Resistance (Typical, Notes 1, 2) θ 4x4 QFN Package . . . . . . . . . Junction Temperature Range .-55°C to +125°C Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = +25° ...
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... PGOOD Delay Time (Falling Edge) EN, SYNCH Logic Input Low Logic Input High Synch Logic Input Leakage Current Enable Logic Input Leakage Current Thermal Shutdown Thermal Shutdown Hysteresis NOTE: 3. Limits established by characterization and are not production tested. 5 ISL8014 = +25°C. (Continued) A SYMBOL TEST CONDITIONS 200mA ...
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... Mode Selection pin. Connect to logic high or input voltage VDD for PWM mode. Connect to logic low or ground for PFM mode. Connect to an external function generator for synchronization with the negative edge trigger. Do not leave this pin floating. 6 ISL8014 LX Switching node connection. Connect to one terminal of the inductor. PGND Power ground. ...
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... OUTPUT LOAD (A) FIGURE 5. EFFICIENCY vs LOAD (1MHz 5V 2.00 1.75 1.50 1.25 5V 1.00 0.75 0.50 5V IN-PWM 0.25 0.00 0.0 0.5 1.0 1.5 2.0 OUTPUT LOAD (A) FIGURE 7. POWER DISSIPATION vs LOAD (1MHz ISL8014 (Unless otherwise noted, operating conditions are: T SYNCH = 0V 1.5µ 2x22µ 100 90 80 OUT-PWM 70 1.2V OUT-PWM 3.0 3.5 4.0 FIGURE 4. EFFICIENCY vs LOAD (1MHz 3.3 V PWM) IN 100 ...
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... IN-PWM 5V IN-PFM 1.49 1.48 1.47 0.0 0.5 1.0 1.5 2.0 OUTPUT LOAD (A) FIGURE 11. V REGULATION vs LOAD (1MHz, V OUT 2.52 2.51 3.3V IN-PFM 2.50 2.49 2.48 2.47 5V IN-PWM 2.46 5V 2.45 IN-PFM 2.44 0.0 0.5 1.0 1.5 2.0 OUTPUT LOAD (A) FIGURE 13. V REGULATION vs LOAD (1MHz, V OUT 8 ISL8014 (Unless otherwise noted, operating conditions are: T SYNCH = 0V 1.5µ 2x22µ 1.24 1.23 1.22 1.21 1.20 1.19 1.18 1.17 1.16 4.5 5.0 5.5 FIGURE 10 1.83 1.82 3.3V IN-PWM 1.81 1.80 1.79 1.78 1.77 1.76 1.75 2.5 3.0 3.5 4.0 = 1.5V) FIGURE 12. V OUT 3.36 3.35 3.3V IN-PWM 3 ...
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... OUT IL 0.5A/DIV FIGURE 17. STEADY STATE OPERATION AT NO LOAD (PWM) LX 2V/DIV IL 2A/DIV V RIPPLE 20mV/DIV OUT FIGURE 19. STEADY STATE OPERATION WITH FULL LOAD 9 ISL8014 (Unless otherwise noted, operating conditions are: T SYNCH = 0V 1.5µ 2x22µ 1.830 1.820 0A LOAD PWM 1.810 1.800 1.790 1 ...
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... RIPPLE 50mV/DIV OUT IL 1A/DIV FIGURE 23. LOAD TRANSIENT (PFM) EN 5V/DIV V 0.5V/DIV OUT IL 1A/DIV PG 5V/DIV FIGURE 25. SOFT-START AT NO LOAD (PFM) 10 ISL8014 (Unless otherwise noted, operating conditions are: T SYNCH = 0V 1.5µ 2x22µ RIPPLE 50mV/DIV OUT IL 1A/DIV FIGURE 22. LOAD TRANSIENT (PWM) EN 5V/DIV V 0.5V/DIV ...
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... V RIPPLE 20mV/DIV OUT IL 0.5A/DIV FIGURE 31. STEADY STATE OPERATION AT NO LOAD WITH FREQUENCY = 4MHz 11 ISL8014 (Unless otherwise noted, operating conditions are: T SYNCH = 0V 1.5µ 2x22µ FIGURE 28. SOFT-DISCHARGE SHUTDOWN FIGURE 30. STEADY STATE OPERATION AT FULL LOAD FIGURE 32. STEADY STATE OPERATION AT FULL LOAD = +25° ...
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... Typical Operating Performance IL 2A/DIV FIGURE 33. OUTPUT SHORT CIRCUIT Theory of Operation The ISL8014 is a step-down switching regulator optimized for battery-powered handheld applications. The regulator operates at 1MHz fixed switching frequency under heavy load conditions to allow smaller external inductors and capacitors to be used for minimal printed-circuit board (PCB) area ...
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... FIGURE 36. PWM OPERATION WAVEFORMS SKIP Mode Pulling the SYNCH pin LO (<0.4V) forces the converter into PFM mode. The ISL8014 enters a pulse-skipping mode at light load to minimize the switching loss by reducing the switching frequency. Figure 37 illustrates the skip-mode operation. A zero-cross sensing circuit shown in Figure 2 monitors the N-MOSFET current for zero crossing ...
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... Duty Cycle The ISL8014 features 100% duty cycle operation to maximize the battery life. When the battery voltage drops to a level that the ISL8014 can no longer maintain the regulation at the output, the regulator completely turns on the P-MOSFET. The maximum dropout voltage under the 100% duty-cycle operation is the product of the load current and the ON-resistance of the P-MOSFET ...
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... The main functions for the input capacitor are to provide decoupling of the parasitic inductance and to provide filtering function to prevent the switching current flowing back to the battery rail. Two 22µF X5R or X7R ceramic capacitors are a good starting point for the input capacitor selection. 15 ISL8014 , will depend on 3 (EQ left 3 FN6576 ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 16 ISL8014 L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220-VGGC ISSUE C) ...