ISL6224CA Intersil, ISL6224CA Datasheet
ISL6224CA
Specifications of ISL6224CA
Available stocks
Related parts for ISL6224CA
ISL6224CA Summary of contents
Page 1
... PART PART NUMBER MARKING TEMP. (°C) ISL6224CA ISL6224CA - ISL6224CAZ 6224CAZ - (Note 1) NOTES: 1. Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...
Page 2
Absolute Maximum Ratings Bias Voltage -0.3V to +7V CC ...
Page 3
Electrical Specifications Operating Conditions: V PARAMETER VOUT pin input impedance Undervoltage Shutdown Level Overvoltage Protection PWM CONTROLLER GATE DRIVERS Upper Drive Pull-Up Resistance Upper Drive Pull-Down Resistance Lower Drive Pull-Up Resistance Lower Drive Pull-Down Resistance POWER GOOD AND CONTROL FUNCTIONS ...
Page 4
Functional Block Diagram VIN VCC CLK FSET RAMP CLK POR EN SDWN REFERENCE REF AND SOFT SOFT-START OUTPUT VOLTAGE MONITOR PGOOD GND FCCM HI POWER-ON SHUTOFF RESET (POR) GATE LOGIC POR DEADT PWM/HYST PWM ON LO HYST ON OC COMP1 ...
Page 5
Functional Pin Description VIN (Pin 1) Provides battery voltage to the oscillator for feed-forward rejection of the input voltage variation. Also, this pin programs frequency of the internal clock and gain of the ramp generator. When connected to the battery, ...
Page 6
Table 1. shows the configuration for different modes of operation. Figure 1 below shows plots of the ramp speed compensation. 300kHz CLOCK 600kHz CLOCK Vin t --------- - -- - 2 T Vo/4 Vo/8 FIGURE 1. RAMP SPEED COMPENSATION ...
Page 7
VOUT I L PHASE COMP MODE PWM OF OPERATION FIGURE 2. HYSTERETIC OPERATION MODE Operation-Mode Control The mode-control circuit changes the converter’s mode of operation based on the voltage polarity of the ...
Page 8
Soft-Start Operation Soft-start of the Synchronous Buck Converter is accomplished by means of a capacitor connected from pin 7, SOFT to ground. The soft-start time can be obtained from the following equation: × 1.5V Css Tss = ----------------------------- - 5.0µA ...
Page 9
Consult with the manufacturer of the load circuitry for specific decoupling requirements. Use only specialized low-ESR capacitors intended for switching-regulator applications, at 300kHz, for the bulk capacitors. In most cases, multiple ...
Page 10
Layout Considerations MOSFETs switch very fast and efficiently. The speed with which the current transitions from one device to another causes voltage spikes across the interconnecting impedances and parasitic circuit elements. The voltage spikes can degrade efficiency, radiate noise into ...
Page 11
... TBD FCCM EN SOFT C4 0.015µF PGOOD FIGURE 5. APPLICATION CIRCUIT FOR ONE-STEP CONVERSION (MODE 1) 11 ISL6224 and circuit board description, see Application Note AN9983. Also see Intersil’s web site (http://www.intersil.com) for the latest information 1µF C1 56µF VIN CR1 VCC 1 ...
Page 12
R2 OCSET 4 TBD FCCM 16 ISL6224 EN 3 SOFT 7 C2 0.015µF PGOOD VIN GND R5 FIGURE 6. APPLICATION CIRCUIT FOR TWO-STEP 300kHz CONVERSION (MODE 2) R2 OCSET 4 TBD FCCM 16 ISL6224 EN 3 SOFT ...
Page 13
... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. 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 ...