CS51312 Datasheet, PDF (1/22 Pages) Cherry Semiconductor Corporation – Synchronous CPU Buck Controller for 12V Only Applications

CS51312
Synchronous CPU
Buck Controller for
12 V Only Applications
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 12 V input. It uses the
V²â„¢ 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, V_CC monitor, Soft Start, adaptive voltage
positioning, adaptive FET non−overlap time, and remote sense. The
CS51312 will operate over a 9.0 V to 20 V (V_CC2) range using either
single or dual input voltage and is available in 16 lead narrow body
surface mount package.
Features
• Synchronous Switching Regulator Controller for CPU V_CORE
• Dual N−Channel MOSFET Synchronous Buck Design
• V² Control Topology
• 200 ns Transient Loop Response
• 5−Bit DAC with 1.2% Tolerance
• Hiccup Mode Overcurrent Protection
• 40 ns Gate Rise and Fall Times (3.3 nF Load)
• 65 ns Adaptive FET Non−Overlap Time
• Adaptive Voltage Positioning
• Power Good Output Monitors Regulator Output
• 5.0 V/12 V or 12 V−Only Operation
• V_CC Monitor Provides Undervoltage Lockout
• OVP Output Monitors Regulator Output
• Multifunctional COMP Pin Provides ENABLE, Soft Start, and
Hiccup Timing in Addition to Control Loop Compensation
http://onsemi.com
16
1
SO−16
D SUFFIX
CASE 751B
MARKING DIAGRAM
16
CS51312
AWLYWW
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
PIN CONNECTIONS
1
V_ID0
V_ID1
V_ID2
V_ID3
V_ID4
V_FB
V_OUT
V_CC1
16
COMP
C_OFF
PWRGD
OVP
GATE(L)
GND
GATE(H)
V_CC2
ORDERING INFORMATION
Device
Package
Shipping
CS51312GD16
SO−16
48 Units/Rail
CS51312GDR16
SO−16 2500 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
1
July, 2006 − Rev. 3
Publication Order Number:
CS51312/D