CS51312 Series

Synchronous CPU Buck Controller for 12V Only Applications

Catalog

Synchronous CPU Buck Controller for 12V Only Applications

Part	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Mounting Type	Number of Outputs	Package Width	Package Name	Package Length	Operating Temperature	Voltage - Output	Applications
ON Semiconductor CS51312GD16	9 V	20 V	Surface Mount	1	3.9 mm	16-SOIC	0.154 in	150 °C	Programmable	Controller CPU
ON Semiconductor CS51312GDR16	9 V	20 V	Surface Mount	1	3.9 mm	16-SOIC	0.154 in	150 °C	Programmable	Controller CPU

Catalog

Synchronous CPU Buck Controller for 12V Only Applications

Key Features

• Synchronous Switching Regulator Controller for CPU VCORE

• Dual N-Channel MOSFET Synchronous Buck Design

• V2Control Topology

• 200ns Transient Loop Response

• 5-Bit DAC with 1.2% Tolerance

• Hiccup Mode Overcurrent Protection

• 40ns Gate Rise and Fall Times (3.3nF Load)

• 65ns Adaptive FET Non-Overlap Time

• Adaptive Voltage Positioning

• Power-Good Output Monitors Regulator Output

• 5V/12V or 12V-Only Operation

• VCCMonitor Provides Under Voltage Lockout

• OVP Output Monitors Regulator Output

• Multifunction COMP Pin Provides ENABLE, Soft Start, and Hiccup Timing in Addition to Control Loop Compensation

Description

The CS51312 is a synchronous dual NFET Buck Regulator Controller. It is designed to power the core logic of the latest high performance CPUs and ASICs from a single 12V input. It uses the V2™control method to achieve the fastest possible transient response and best overall regulation. It incorporates many additional features required to ensure the proper operation and protection of the CPU and Power system. The CS51312 provides the industry's most highly integrated solution, minimizing external component count, total solution size, and cost.The CS51312 is specifically designed to power Intel's Pentium®II processor and includes the following features: 5-bit DAC with 1.2% tolerance, Power-Good output, overcurrent hiccup mode protection, overvoltage protection, VCCmonitor, Soft Start, adaptive voltage positioning, adaptive FET non-overlap time, and remote sense. The CS51312 will operate over a 9 V to 20 V (VCC2) range using either single or dual input voltage and is available in 16 lead narrow body surface mount package.