CS5308 Datasheet, PDF (1/31 Pages) ON Semiconductor – Two−Phase PWM Controller with Integrated Gate Drivers for VRM 8.5

CS5308
Two−Phase PWM Controller
with Integrated Gate
Drivers for VRM 8.5
The CS5308 is a second−generation, two−phase step down
controller that incorporates all control functions required to power
next generation processors. Proprietary multi−phase architecture
guarantees balanced load current distribution and reduces overall
solution cost in high current applications. Enhanced V²â„¢ control
architecture provides the fastest possible transient response, excellent
overall regulation, and ease of use. The CS5308 is a second generation
PWM controller because it optimizes transient response by combining
traditional Enhanced V² with an internal PWM ramp and
fast−feedback directly from V_CORE to the internal PWM comparator.
These enhancements provide greater design flexibility, facilitate use
and reduce output voltage jitter.
The multi−phase architecture reduces input and output filter ripple,
allowing for a significant reduction in filter size and inductor values
with a corresponding increase in the output inductor current slew rate.
This approach allows a considerable reduction in input and output
capacitor requirements, as well as reducing overall solution size and
cost.
The CS5308 includes VTT monitoring and timing, VTT Power
Good (VTT_PGD), Power Good (PWRGD), and internal MOSFET gate
drivers to provide a “fully integrated solution” to simplify design,
minimize circuit board area, and reduce overall system cost.
Features
• Enhanced V² Control Method
• Internal PWM Ramp
• Fast−Feedback Directly from V_CORE
• 5−Bit DAC with 1% Tolerance
• Adjustable Output Voltage Positioning
• 200 kHz to 800 kHz Operation Set by Resistor
• Current Sensed through Sense Resistors or Output Inductors
• Adjustable Hiccup Mode Current Limit
• Overvoltage Protection through Synchronous MOSFETs
• Individual Current Limits for Each Phase
• On−Board Current Share Amplifiers
• 3.3 V, 1.0 mA Reference Output
• VTT Monitoring and VTT Power Good (VTT_PGD)
• V_CORE Power Good
• On/Off Control (through COMP Pin)
• Improved Noise Immunity
http://onsemi.com
28
1
SO−28L
DW SUFFIX
CASE 751F
MARKING
DIAGRAM
28
CS5308
AWLYYWW
1
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
PIN CONNECTIONS
1
COMP
V_FB
V_DRP
REF
I_LIM
V_ID25
V_ID0
V_ID1
V_ID2
V_ID3
PWRGD
CS_REF
CS1
CS2
28
R_OSC
LGND
V_CCL
V_CCH1
GATE(H)1
GATE(L)1
PGND
V_CCL12
GATE(L)2
GATE(H)2
V_CCH2
VTT_PGD
VTT_CT
VTT
ORDERING INFORMATION
Device
Package
Shipping
CS5308GDW28
SO−28L 27 Units/Rail
CS5308GDWR28 SO−28L 1000 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
1
July, 2006 − Rev. 6
Publication Order Number:
CS5308/D