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Package Cooled:500
Part Number: ADP3156
Package Cooled: 500
Description: The ADP3156 is a highly efficient synchronous buck switching regulator controller optimized for converting the 3.3 V or...
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ADP3156
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DataSheet
General Description
ADP3156 General Description
The ADP3156 is a highly efficient synchronous buck switching regulator controller optimized for converting the 3.3 V or 5 V main supply into lower supply voltages required on the motherboards of Pentium® III and other high performance processor systems. The ADP3156 uses a current mode, constant off-time architecture to drive two external N-channel MOSFETs at a programmable switching frequency that can be optimized for size and efficiency. It also uses a unique supplemental regulation technique called active voltage positioning to enhance load transient performance. Active voltage positioning results in a
DC/DC converter that provides the best possible transient response using the minimum number of output capacitors and smallest footprint. Unlike voltage-mode and standard currentmode architectures, active voltage positioning adjusts the output voltage as a function of the load current so that it is always optimally positioned for a system transient.
The ADP3156 provides accurate and reliable short circuit protection and adjustable current limiting. It also includes an integrated overvoltage crowbar function to protect the microprocessor from destruction in case the core supply exceeds the nominal programmed voltage by more than 15%.
ADP3156 Maximum Ratings
Input Supply Voltage (VCC) . . . . . . . . . . . . . . .0.3 V to +16 V
Shutdown Input Voltage . . . . . . . . . . . . . . . . 0.3 V to +16 V
Operating Ambient Temperature Range . . . . . . 0°C to +70°C
Junction Temperature Range . . . . . . . . . . . . . . 0°C to +150°C
JA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90°C/W
Storage Temperature Range . . . . . . . . . . . 65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C
Shutdown Input Voltage . . . . . . . . . . . . . . . . 0.3 V to +16 V
Operating Ambient Temperature Range . . . . . . 0°C to +70°C
Junction Temperature Range . . . . . . . . . . . . . . 0°C to +150°C
JA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90°C/W
Storage Temperature Range . . . . . . . . . . . 65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C
ADP3156 Features
Active Voltage Positioning with Gain and Offset Adjustment
Optimal Compensation for Superior Load Transient Response
Fixed 1.5 V, 1.8 V and 2.5 V Output Versions
Dual N-Channel Synchronous Driver
On-Board Linear Regulator Controller
Total Output Accuracy 61% Over Temperature
High Efficiency, Current-Mode Operation
Short Circuit Protection
Overvoltage Protection Crowbar Protects Loads with No Additional External Components
Power Good Output
SO-16 Package
Optimal Compensation for Superior Load Transient Response
Fixed 1.5 V, 1.8 V and 2.5 V Output Versions
Dual N-Channel Synchronous Driver
On-Board Linear Regulator Controller
Total Output Accuracy 61% Over Temperature
High Efficiency, Current-Mode Operation
Short Circuit Protection
Overvoltage Protection Crowbar Protects Loads with No Additional External Components
Power Good Output
SO-16 Package
ADP3156 Typical Application
Desktop Computer Supplies
ACPI-Compliant Power Systems
General Purpose DC-DC Converters
ACPI-Compliant Power Systems
General Purpose DC-DC Converters
ADP3156 Connection Diagram
ADP3156
PDF/DataSheet Download
- Datasheet: ADP3156
- File Size: 190886 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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