Document
CS5166H
5−Bit Synchronous CPU
Controller with Power Good
and Current Limit
The CS5166H is a synchronous dual NFET buck controller. It is designed to power the core logic of the latest high performance CPUs. It uses 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 CS5166H provides the industry’s most highly integrated solution, minimizing external component count, total solution size, and cost.
The CS5166H is specifically designed to power Intel’s Pentium®II processor and includes the following features: 5−bit DAC with 1.0% tolerance, Power Good output, adjustable hiccup mode overcurrent protection, VCC monitor, Soft Start, adaptive voltage positioning, overvoltage protection, remote sense and current sharing capability.
The CS5166H will operate over a 4.15 to 20 V range using either single or dual input voltage and is available in a 16 lead wide body surface mount package.
Features
• V2 Control Topology • Dual N−Channel Design • 125 ns Controller Transient Response • Excess of 1.0 MHz Operation • 5−Bit DAC with 1.0% Tolerance • Power Good Output With Internal Delay • Adjustable Hiccup Mode Overcurrent Protection • Complete Pentium II System Requires Just 21 Components • 5.0 V & 12 V Operation Using Either Dual or Single Supplies • Adaptive Voltage Positioning • Remote Sense Capability • Current Sharing Capability • VCC Monitor • Overvoltage Protection (OVP) • Programmable Soft Start • 200 ns PWM Blanking • 65 ns FET Nonoverlap Time • 40 ns Gate Rise and Fall Times (3.3 nF Load)
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16
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SO−16L DW SUFFIX CASE 751G
MARKING DIAGRAM 16
CS5166H AWLYYWW
1
A WL, L YY, Y WW, W
= Assembly Location = Wafer Lot = Year = Work Week
PIN CONNECTIONS
1 VID0 VID1 VID2 VID3
SS VID4 COFF ISENSE
16 VFB COMP LGND PWRGD GATE(L) PGND
GATE(H) VCC
ORDERING INFORMATION
Device
Package
Shipping
CS5166HGDW16 SO−16L 46 Units/Rail CS5166HGDWR16 SO−16L 1000 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 3
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Publication Order Number: CS5166H/D
12 V 1.0 μF
330 pF
0.1 μF
0.1 μF
COFF VCC
SS COMP
GATE(H) ISENSE
CS5166H
VID0 VID1 VID2 VID3
GATE(L) PGND
LGND
VID4 PWRGD VFB
CS5166H
5.0 V
1200 μF/10 V × 3
1.2 μH
3.0 mΩ 510
0.1 μF
3.3 k 1000 pF
VCC 1200 μF/10 V × 5
PWRGD
VID4 VID3 VID2 VID1 VID0
Pentium II System
Figure 1. Application Diagram, 5.0 V to 2.8 V @ 14.2 A for 300 MHz Pentium II
ABSOLUTE MAXIMUM RATINGS*
Rating
Operating Junction Temperature, TJ Lead Temperature Soldering:
Storage Temperature Range, TS 1. 60 second maximum above 183°C. *The maximum package power dissipation must be observed.
Reflow: (SMD styles only) (Note 1)
Value 0 to 150 230 peak −65 to +150
Unit °C °C °C
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CS5166H
ABSOLUTE MAXIMUM RATINGS
Pin Name
Pin Symbol
IC Power Input Soft Start Capacitor
VCC SS
Compensation Capacitor
COMP
Voltage Feedback and Current Sense Comparator Input
VFB
Off−Time Capacitor Voltage ID DAC Inputs High−Side FET Driver
COFF VID0−VID4 GATE(H)
Low−Side FET Driver
GATE(L)
Current Sense Comparator Input Power Good Output
ISENSE PWRGD
Power Ground
PGND
Logic Ground
LGND
VMAX 20 V 6.0 V 6.0 V 6.0 V
6.0 V 6.0 V 20 V 20 V 6.0 V 6.0 V 0V 0V
VMIN −0.3 V −0.3 V −0.3 V −0.3 V
−0.3 V −0.3 V −0.3 V −0.3 V −0.3 V −0.3 V
0V 0V
ISOURCE N/A
200 μA 10 mA 1.0 mA
ISINK 1.5 A peak, 200 mA DC
10 μA 1.0 mA 1.0 mA
1.0 mA 1.0 mA 1.5 A peak, 200 mA DC 1.5 A peak, 200 mA DC 1.0 mA 10 μA 1.5 A peak, 200 mA DC 100 mA
50 mA 10 μA 1.5 A peak, 200 mA DC 1.5 A peak, 200 mA DC 1.0 mA 30 mA N/A N/A
ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; 8.0 V < VCC < 20 V; 2.0 DAC Code: (VID4 = VID3 = VID2 = VID1 = 0, VID0 = 1), CGATE(H) = CGATE(L) = 3.3 nF; COFF = 330 pF; CSS = 0.1 μF, unless otherwise specified.)
Characteristic
Test Conditions
Min Typ Max Unit
VCC Supply Current Operating
1.0 V < VFB < VDAC (max on−time), No Loads on GATE(H) and GATE(L)
− 12 20 mA
VCC Monitor Start Threshold
GATE(H) switching
3.75 3.95 4.15
V
Stop Threshold
GATE(H) not switching
3.65 3.87 4.05
V
Hysteresis
Start−Stop
− 80 − mV
Error Amplifier
VFB Bias Current COMP Source Current COMP CLAMP Voltage
VFB = 0 V COMP = 1.2 V to 3.6 V; VFB = 1.9 V VFB = 1.9 V, Adjust COMP voltage for Comp
current = 60 μA
− 0.1 1.0 μA 15 30 60 μA 0.85 1.0 1.15 V
COMP Clamp Current
COMP = 0 V
0.4 1.0 1.6 mA
COMP Sink Current Open Loop Gain
VCOMP = 1.2 V; VFB = 2.2 V; VSS > 2.5 V Note 2
180 400 800 μA
50 60
− dB
Unity Gain Bandwidth
Note 2
0.5 2.0
− MHz
PSRR @ 1.0 kHz
Note 2
60 85
− dB
Overcurrent Detection
Current Limit Voltage
VFB = 0 V to 3.5 V, 8.0 V < VCC < 12 V + 10% 55 76 130 mV
ISENSE Bias Current
ISENSE = 2.8 V
13 30 50 μA
2. Guaranteed by design, not 100% tested in production.
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CS5166H
ELECTRICAL CHARACTERISTICS (continued) (0°.