7
Board Description - MLFP
Silk Screen
Top Layer
Ground Layer
Power Layer
Bottom Layer
AN1021
Page 1: ...ngeable The ISL6526EVAL2 and ISL6527EVAL2 are ready for evaluation without any modifications All evaluation boards have the same output filter compensation components and MOSFETs They are configured for an output of 2 5V with a maximum load of 5A The ISL6526 evaluation boards have a fixed output while the ISL6527 evaluation boards allow the use of a potentiometer to adjust the output voltage from ...
Page 2: ...e regulator to start up Figure 2 shows the start up profile with this method Shutdown As discussed in the previous section if the OCSET SD pin or ENABLE pin is pulled down and held below 0 8V the regulator will be turned off The MOSFET gates are immediately pulled low Figure 3 shows the shutdown profile of the regulator under full load ISL6527 Input Reference A distinguishing feature of the ISL652...
Page 3: ...ve The design must be careful to include any parasitic impedances of the PC board if the DCR of the inductor is very low The ISL6526 27 evaluation board does not have any component footprints that would allow an implementation of droop This section is included in this application note as a guideline in the event that droop is necessary in a design utilizing the ISL6526 or ISL6527 Figure 8 shows a ...
Page 4: ...nd ISL6527 regulators allow for highly efficient systems The efficiency of the evaluation board in is shown in Figure 10 The efficiencies of the converter for both sinking and sourcing current are identical Conclusion The ISL6526 and ISL6527 are versatile PWM controllers Compact and highly efficient regulators can be implemented with either IC Both ICs offer small footprints and features which mak...
Page 5: ... U1 ISL6526 300kHz Synchronous Buck PWM Controller SOIC Intersil ISL6526CB 1 R6526 Zero Ohm Jumper Various 1 R6527A R6527B Unpopulated Zero Ohm Jumper Various 0 ISL6526A 600kHz Synchronous Buck PWM Controller SOIC Intersil ISL6526ACB 1 The additional IC is bagged and tagged and shipped with the assembled evaluation board ISL6526EVAL2 Evaluation Board U1 ISL6526 300kHz Synchronous Buck PWM Controll...
Page 6: ...pF Capacitor 0603 Various 1 C11 5600pF Capacitor 0603 Various 1 C12 8200pF Capacitor 0603 Various 1 D1 Diode 30mA 30V Digikey MA732 1 L1 1µH Inductor Panasonic ETQP6F1R0SFA 1 Q1 Dual MOSFET 8 Pin SOIC Fairchild ITF86110DK8 1 R1 9 76kΩ 1 Resistor 0603 Various 1 R2 6 49kΩ 1 Resistor 0603 Various 1 R3 2 26kΩ 1 Resistor 0603 Various 1 R4 124Ω 1 Resistor 0603 Various 1 R5 1 07kΩ 1 Resistor 0603 Various...
Page 7: ...7 Board Description MLFP Silk Screen Top Layer Ground Layer Power Layer Bottom Layer AN1021 ...
Page 8: ...ed 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 No license is granted by implication or otherwise under any patent or patent righ...
