The ISL6506 complements other power building blocks (voltage regulators) inbrACPI-compliant designs for microprocessor and computer applications. The IC integrates the control of the 5VsubDUAL/sub and 3.3VsubDUAL/sub rails into an 8 Ld EPAD SOIC package. The ISL6506 operating mode (active outputs or sleep outputs) is selectable through two digital control pins; span style="text-decorati
on: overline"S3/span and span style="text-decorati
on: overline"S5/span.brb
r A completely integrated linear regulator generates the 3.3VsubDUAL/sub voltage plane from the ATX supply's 5VsubSB/sub output during sleep states (S3, S4/S5). In active states (during S0 and S1/S2), the ISL6506 uses an external N-Channel pass MOSFET to connect the outputs directly to the 3.3V input supplied by an ATX power supply, for minimal losses.brbr The ISL6506 powers up the 5VsubDUAL/sub plane by switching in the ATX 5V output through an NMOS transistor in active states, or by switching in the ATX 5VsubSB/sub through a PMOS (or PNP) transistor in S3 sleep state. In S4/S5 sleep states, the ISL6506 and ISL6506B 5VsubDUAL/sub output is shut down. In the ISL6506A, the 5VsubDUAL/sub output stays on during S4/S5 sleep states.brbr Functionally, the ISL6506 and ISL6506B are identical. The ISL6506B, however, features a 2A current limit on the internal 3.3V LDO while the ISL6506 has a 1A current limit. The ISL6506A has a 1A current limit on the internal 3.3V LDO.
The ISL6506 complements other power building blocks (voltage regulators) inbrACPI-compliant designs for microprocessor and computer applications. The IC integrates the control of the 5VsubDUAL/sub and 3.3VsubDUAL/sub rails into an 8 Ld EPAD SOIC package. The ISL6506 operating mode (active outputs or sleep outputs) is selectable through two digital control pins; span style="text-decoration: overline"S3/span and span style="text-decoration: overline"S5/span.brbr A completely integrated linear regulator generates the 3.3VsubDUAL/sub voltage plane from the ATX supply's 5VsubSB/sub output during sleep states (S3, S4/S5). In active states (during S0 and S1/S2), the ISL6506 uses an external N-Channel pass MOSFET to connect the outputs directly to the 3.3V input supplied by an ATX power supply, for minimal losses.brbr The ISL6506 powers up the 5VsubDUAL/sub plane by switching in the ATX 5V output through an NMOS transistor in active states, or by switching in the ATX 5VsubSB/sub through a PMOS (or PNP) transistor in S3 sleep state. In S4/S5 sleep states, the ISL6506 and ISL6506B 5VsubDUAL/sub output is shut down. In the ISL6506A, the 5VsubDUAL/sub output stays on during S4/S5 sleep states.brbr Functionally, the ISL6506 and ISL6506B are identical. The ISL6506B, however, features a 2A current limit on the internal 3.3V LDO while the ISL6506 has a 1A current limit. The ISL6506A has a 1A current limit on the internal 3.3V LDO.
