ISL6522BIBZ Intersil, ISL6522BIBZ Datasheet
ISL6522BIBZ
Specifications of ISL6522BIBZ
Available stocks
Related parts for ISL6522BIBZ
ISL6522BIBZ Summary of contents
Page 1
... Copyright © Intersil Americas Inc. 2004, 2005. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. ® PowerPC is a trademark of IBM. AlphaPC™ trademark of Digital Equipment Corporation. Pentium Features • Drives two N-Channel MOSFETs • Operates from +5V or +12V input • ...
Page 2
... Ld SOIC (See Note) (Pb-free) ISL6522BCR 5x5 QFN ISL6522BCRZ 5x5 QFN (See Note) (Pb-free) ISL6522BIB* - SOIC ISL6522BIBZ* - SOIC (See Note) (Pb-free) ISL6522BIR* - 5x5 QFN ISL6522BIRZ* - 5x5 QFN (See Note) (Pb-free) *Add “-T” suffix for tape and reel. NOTE: Intersil Pb-free products employ special Pb-free material sets ...
Page 3
Typical Application SS RT REF FB Block Diagram OCSET REFERENCE FB COMP RT 3 ISL6522B 12V V CC OCSET MONITOR AND EN PROTECTION BOOT ISL6522B OSC UGATE PHASE +12V PV CC LGATE - + + PGND - COMP GND RESET ...
Page 4
Absolute Maximum Ratings Supply Voltage +15.0V CC Boot ...
Page 5
Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted (Continued) PARAMETER Soft START Soft-Start Current Peak Soft Start Voltage GATE DRIVERS Upper Gate Source Upper Gate Sink Lower Gate Source Lower Gate Sink PROTECTION OCSET Current Source Typical Performance Curves R ...
Page 6
Functional Pin Descriptions ISL6522B (SOIC) TOP VIEW OCSET COMP GND 7 ISL6522B (QFN) TOP VIEW COMP ...
Page 7
Functional Description Initialization The ISL6522B automatically initializes upon receipt of power. Special sequencing of the input supplies is not necessary. The Power-On Reset (POR) function continually monitors the input supply voltages and the enable (EN) pin. The POR monitors the ...
Page 8
Overcurrent Protection The overcurrent function protects the converter from a shorted output by using the upper MOSFETs on-resistance monitor the current. This method enhances the DS(ON) converter’s efficiency and reduces cost by eliminating a current sensing resistor. The ...
Page 9
Figure 6 shows the circuit traces that require additional layout consideration. Use single point and ground plane construction for the circuits shown. Minimize any leakage current paths on the SS PIN and locate the capacitor, C close to the SS ...
Page 10
ND 3. Place 2 Zero at Filter’s Double Pole ST 4. Place 1 Pole at the ESR Zero ND 5. Place 2 Pole at Half the Switching Frequency 6. Check Gain against Error Amplifier’s Open-Loop Gain 7. Estimate Phase Margin ...
Page 11
The response time to a transient is different for the application of load and the removal of load. The following equations give the approximate response time interval for application and removal of a transient load: × × ...
Page 12
D BOOT +12V +5V OR +12V - + V D VCC BOOT ISL6522B C BOOT Q1 UGATE PHASE +5V OR +12V PVCC Q2 LGATE - + PGND GND FIGURE 9. UPPER GATE DRIVE - BOOTSTRAP OPTION Figure 10 shows the ...
Page 13
... CR2 - 3A, 40V Schottky, Motorola MBR340 or equivalent. Q1 Fairchild MOSFET; RFP25N05 13 ISL6522B modifications. Detailed information on the circuit, including a complete bill of materials and circuit board description, can be found in Application Note AN9722. See Intersil’s home page on the web: http://www.intersil.com. C12 C19 1µF VCC ...
Page 14
Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α µ 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in ...
Page 15
... 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 ...