• 简体中文
• English

The ISL6506 complements other power building blocks (voltage regulators) in
ACPI-compliant designs for microprocessor and computer applications. The IC integrates the control of the 5V_DUAL and 3.3V_DUAL rails into an 8 Ld EPAD SOIC package. The ISL6506 operating mode (active outputs or sleep outputs) is selectable through two digital control pins; S3 and S5.

A completely integrated linear regulator generates the 3.3V_DUAL voltage plane from the ATX supply's 5V_SB 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.

The ISL6506 powers up the 5V_DUAL plane by switching in the ATX 5V output through an NMOS transistor in active states, or by switching in the ATX 5V_SB through a PMOS (or PNP) transistor in S3 sleep state. In S4/S5 sleep states, the ISL6506 and ISL6506B 5V_DUAL output is shut down. In the ISL6506A, the 5V_DUAL output stays on during S4/S5 sleep states.

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.

Key Features

• Provides 2 ACPI-Controlled Voltages
  • 5VDUAL USB/Keyboard/Mouse
  • 3.3VDUAL/3.3VSB PCI/Auxiliary/LAN
• Excellent 3.3VDUAL Regulation in S3/S4/S5
  • ±2.0% over temperature
  • 1A Capability on ISL6506 and ISL6506A
  • 2A Capability on ISL6506B
• Small Size; Very Low External Component Count
• Over-Temperature Shutdown
• Pb-Free Available (RoHS Compliant)

Applications

• ACPI-Compliant Power Regulation for Motherboards
  • ISL6506, ISL6506B: 5VDUAL is shut down in S4/S5 sleep states
  • ISL6506A: 5VDUAL stays on in S4/S5 sleep states