ISL6504 Datasheet, PDF (1/16 Pages) Intersil Corporation – Multiple Linear Power Controller with ACPI Control Interface

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Data Sheet
ISL6504, ISL6504A
April 13, 2004
FN9062.2
Multiple Linear Power Controller with
ACPI Control Interface
The ISL6504 and ISL6504A complement other power
building blocks (voltage regulators) in ACPI-compliant
designs for microprocessor and computer applications. The
IC integrates three linear controllers/regulators, switching,
monitoring and control functions into a 16-pin wide-body
SOIC or 20-pin QFN 6x6 package. The ISL6504, ISL6504A
operating mode (active outputs or sleep outputs) is
selectable through two digital control pins, S3 and S5.
One linear controller generates the 3.3V_DUAL/3.3V_SB
voltage plane from the ATX supply’s 5V_SB output, powering
the south bridge and the PCI slots through an external NPN
pass transistor during sleep states (S3, S4/S5). In active
state (during S0 and S1/S2), the 3.3V_DUAL/3.3V_SB linear
regulator 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.
A controller 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
ISL6504 5V_DUAL output is shut down. In the ISL6504A, the
5V_DUAL output stays on during S4/S5 sleep states. This is
the only difference between the two parts; see Table 1.
An internal linear regulator supplies the 1.2V for the voltage
identification circuitry (VID) only during active states (S0 and
S1/S2), and uses the 3V3 pin as input source for its internal
pass element. Another internal regulator outputs a 1.5V_SB
chip-set standby supply, which uses the 3V3DL pin as input
source for its internal pass element. The 3.3V_DUAL/3.3V_SB
and 1.5V_SB outputs are active for as long as the ATX 5V_SB
voltage is applied to the chip.
Features
• Provides four ACPI-Controlled Voltages
- 5V_DUAL USB/Keyboard/Mouse
- 3.3V_DUAL/3.3V_SB PCI/Auxiliary/LAN
- 1.2V_VID Processor VID Circuitry
- 1.5V_SB ICH4 Resume Well
• Excellent Output Voltage Regulation
- All Outputs: ±2.0% over temperature (as applicable)
• Small Size; Very Low External Component Count
• Undervoltage Monitoring of All Outputs with Centralized
FAULT Reporting and Temperature Shutdown
• QFN Package:
- Near Chip Scale Package Footprint; Improved PCB
Efficiency; Thinner profile
• Pb-Free Available (RoHS Compliant)
Applications
• _{ACPI-Compliant Power Regulation for Motherboards}
- ISL6504: 5V_DUAL is shut down in S4/S5 sleep states
- ISL6504A: 5V_DUAL stays on in S4/S5 sleep states
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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