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EL7531 Datasheet(PDF) 3 Page - Intersil Corporation |
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EL7531 Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 11 page 3 FN7428.9 July 13, 2006 Block Diagram Pin Descriptions PIN NUMBER PIN NAME PIN FUNCTION 1 SGND Negative supply for the controller stage 2 PGND Negative supply for the power stage 3 LX Inductor drive pin; high current digital output with average voltage equal to the regulator output voltage 4 VIN Positive supply for the power stage 5 VDD Power supply for the controller stage 6 SYNC SYNC input pin; when connected to HI, regulator runs at forced PWM mode; when connected to Low, auto PFM/PWM mode; when connected to external sync signal, at external PWM frequency up to 12MHz 7 EN Enable 8 PG Power-Good open drain output 9 VO Output voltage sense 10 FB Voltage feedback input; connected to an external resistor divider between VO and SGND for variable output - + - + - + - + - + CONTROL LOGIC PFM ON-TIME CONTROL PWM COMPENSATION RAMP GENERATOR UNDER- VOLTAGE LOCKOUT POWER GOOD CLOCK SOFT- START BANDGAP REFERENCE TEMPERATURE SENSE + – VIN LX PGND PG VO FB SYNC EN VDD SGND 10pF 5M 124K 100K 10µF 3.3V SYNC EN PWM COMPARATOR PWM COMPARATOR SYNCHRONOUS RECTIFIER N-DRIVER P-DRIVER CURRENT SENSE INDUCTOR SHORT 1.8µH 10µF 100K PG 1.8V 0 TO 1A 100 Ω 0.1µF C4 470pF EL7531 |
Similar Part No. - EL7531_06 |
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Similar Description - EL7531_06 |
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