ADP3186JRUZ-REEL

ADP3186JRUZ-REEL Datasheet

5-Bit Programmable 2-/3-/4-Phase Synchronous Buck Controller ADP3186

Part	Datasheet
ADP3186JRUZ-REEL	ADP3186JRUZ-REEL (pdf)

Related Parts	Information
ADP3186JRQZ-RL	ADP3186JRQZ-RL

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5-Bit Programmable 2-/3-/4-Phase Synchronous Buck Controller ADP3186 Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per phase ±1% worst-case differential sensing error over temperature Logic-level PWM outputs for interface to external high power drivers Active current balancing between all output phases Built-in power good/crowbar blanking supports on-the-fly VID code changes 5-bit digitally programmable V to V output Programmable short-circuit protection with programmable latch-off delay Desktop PC power supplies for AMD Opteron processors VRM modules The ADP3186 is a highly efficient multiphase synchronous buck switching regulator controller optimized for converting a 12 V main supply into the core supply voltage required by high performance AMD processors. It uses an internal 5-bit DAC to read a voltage identification VID code directly from the processor, which is used to set the output voltage between V and V. It uses a multimode PWM architecture to drive the logic-level outputs at a programmable switching frequency that can be optimized for VR size and efficiency. The phase relationship of the output signals can be programmed to provide 2-, 3-, or 4-phase operation, allowing the construction of up to four complementary buck switching stages. The ADP3186 includes programmable no-load offset and slope functions to adjust the output voltage as a function of the load current, so that it is always optimally positioned for a system transient. The ADP3186 also provides accurate and reliable short-circuit protection, adjustable current limiting, and a power good output that accommodates on-the-fly output voltage changes requested by the CPU. The ADP3186 is specified over the commercial temperature range of 0°C to 85°C and is available in 28-lead TSSOP and QSOP packages. FUNCTIONAL BLOCK DIAGRAM ADP3186 RAMPADJ RT EN 11 GND 19 UVLO SHUTDOWN AND BIAS OSCILLATOR CMP RESET 27 PWM1 CROWBAR 6 CSREF 2.1V DAC + 300mV CSREF DAC 300mV PWRGD 10 DELAY ILIMIT 15 EN DELAY 12 COMP 9 SOFT START CURRENT BALANCING CIRCUIT RESET 2-/3-/4-PHASE DRIVER LOGIC RESET 26 PWM2 25 PWM3 CMP RESET 24 PWM4 CROWBAR CURRENT LIMIT CURRENT LIMIT CIRCUIT 23 SW1 22 SW2 21 SW3 20 SW4 17 CSSUM 16 CSREF 18 CSCOMP PRECISION REFERENCE DC Loadline Setting 21 AC Loadline 21 Initial Transient Setting 22 Layout and Component Placement 22 General Recommendations 22 Power Circuitry Recommendations 23 Signal Circuitry Recommendations 23 Outline Dimensions 24 Ordering Guide 24 Sp0 Initial Version SPECIFICATIONS VCC = 12 V, FBRTN = GND, TA = 0°C to 85°C, unless otherwise specified.1 Table Parameter ERROR AMPLIFIER Output Voltage Range2 Accuracy V Output V Output V Output Line Regulation Input Bias Current FBRTN Current Output Current Gain Bandwidth Product Slew Rate VID INPUTS Input Low Voltage Input High Voltage Input Current, Input Voltage Low Pull-Up Resistance Internal Pull-Up Voltage VID Transition Delay Time2 No CPU Detection Turn-Off Delay Time2 OSCILLATOR Frequency Range2 Frequency Variation Output Voltage Timing Resistor Value RAMPADJ Output Voltage RAMPADJ Input Current Range CURRENT SENSE AMPLIFIER Offset Voltage Input Bias Current Gain Bandwidth Product Slew Rate Input Common-Mode Range Symbol Conditions VCOMP VFB IFB IFBRTN IO ERR GBW ERR Referenced to FBRTN, CSSUM = CSCOMP, Figure 2 TSSOP QSOP Referenced to FBRTN, CSSUM = CSCOMP, Figure 2 TSSOP QSOP Referenced to FBRTN, CSSUM = CSCOMP, Figure 2 TSSOP QSOP VCC = 10 V to 14 V FB Forced to VOUT 3% COMP = FB CCOMP = 10 pF VIL VID VIH VID IIL VID RVID VID X = 0 V VID code change to FB change VID code change to PWM going low fOSC fPHASE VRT VRAMPADJ IRAMPADJ TA = 25°C, RT = 250 kΩ, 4-phase TA = 25°C, RT = 115 kΩ, 4-phase TA = 25°C, RT = 75 kΩ, 4-phase RT = 100 kΩ to GND RAMPADJ FB VOS CSA IBIAS CSSUM GBW CSA CSSUM CSREF, Figure 3 TSSOP QSOP CCSCOMP = 10 pF CSSUM and CSREF ADP3186 Unit −13 100 500 20 25 −17 V/us −50 −3 −50 V/us ADP3186 Parameter Positioning Accuracy Output Voltage Range Output Current ORDERING GUIDE Model ADP3186JRUZ-REEL1 ADP3186JRQZ-REEL1 Temperature Range 0°C to 85°C 0°C to 85°C 1 Z = Pb-free part. Package Description 28-Lead TSSOP 28-Lead QSOP Package Option RU-28 RQ-28 Quantity per Reel 2500 2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04914-0-3/06 A

PDF Datasheet Preview

5-Bit Programmable 2-/3-/4-Phase Synchronous Buck Controller ADP3186

Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per phase
±1% worst-case differential sensing error over temperature Logic-level PWM outputs for interface to external high
power drivers Active current balancing between all output phases Built-in power good/crowbar blanking supports on-the-fly

VID code changes 5-bit digitally programmable V to V output Programmable short-circuit protection with programmable
latch-off delay

Desktop PC power supplies for AMD Opteron processors VRM modules

The ADP3186 is a highly efficient multiphase synchronous buck switching regulator controller optimized for converting a 12 V main supply into the core supply voltage required by high performance AMD processors. It uses an internal 5-bit DAC to read a voltage identification VID code directly from the processor, which is used to set the output voltage between V and V. It uses a multimode PWM architecture to drive the logic-level outputs at a programmable switching frequency that can be optimized for VR size and efficiency. The phase relationship of the output signals can be programmed to provide 2-, 3-, or 4-phase operation, allowing the construction of up to four complementary buck switching stages.

The ADP3186 includes programmable no-load offset and slope functions to adjust the output voltage as a function of the load current, so that it is always optimally positioned for a system transient. The ADP3186 also provides accurate and reliable short-circuit protection, adjustable current limiting, and a power good output that accommodates on-the-fly output voltage changes requested by the CPU.

The ADP3186 is specified over the commercial temperature range of 0°C to 85°C and is available in 28-lead TSSOP and QSOP packages.

FUNCTIONAL BLOCK DIAGRAM

ADP3186

RAMPADJ RT

EN 11 GND 19

UVLO SHUTDOWN

AND BIAS

OSCILLATOR CMP

RESET
27 PWM1

CROWBAR 6

CSREF 2.1V

DAC + 300mV CSREF

DAC 300mV

PWRGD 10

DELAY

ILIMIT 15 EN

DELAY 12 COMP 9

SOFT START

CURRENT BALANCING

CIRCUIT

RESET 2-/3-/4-PHASE DRIVER LOGIC

RESET
26 PWM2 25 PWM3

CMP RESET
24 PWM4

CROWBAR

CURRENT LIMIT

CURRENT LIMIT

CIRCUIT
23 SW1 22 SW2 21 SW3 20 SW4 17 CSSUM 16 CSREF 18 CSCOMP

PRECISION REFERENCE
DC Loadline Setting 21 AC Loadline 21 Initial Transient Setting 22 Layout and Component Placement 22 General Recommendations 22 Power Circuitry Recommendations 23 Signal Circuitry Recommendations 23 Outline Dimensions 24 Ordering Guide 24
Sp0 Initial Version

SPECIFICATIONS

VCC = 12 V, FBRTN = GND, TA = 0°C to 85°C, unless otherwise specified.1

Table Parameter ERROR AMPLIFIER

Output Voltage Range2 Accuracy

V Output

V Output

V Output

Line Regulation Input Bias Current FBRTN Current Output Current Gain Bandwidth Product Slew Rate VID INPUTS Input Low Voltage Input High Voltage Input Current, Input Voltage Low Pull-Up Resistance Internal Pull-Up Voltage VID Transition Delay Time2 No CPU Detection Turn-Off Delay

Time2 OSCILLATOR

Frequency Range2 Frequency Variation

Output Voltage Timing Resistor Value RAMPADJ Output Voltage RAMPADJ Input Current Range CURRENT SENSE AMPLIFIER Offset Voltage

Input Bias Current Gain Bandwidth Product Slew Rate Input Common-Mode Range

Symbol Conditions

VCOMP VFB

IFB IFBRTN IO ERR GBW ERR

Referenced to FBRTN, CSSUM = CSCOMP, Figure 2 TSSOP QSOP Referenced to FBRTN, CSSUM = CSCOMP, Figure 2 TSSOP QSOP Referenced to FBRTN, CSSUM = CSCOMP, Figure 2 TSSOP QSOP VCC = 10 V to 14 V

FB Forced to VOUT 3% COMP = FB CCOMP = 10 pF

VIL VID VIH VID IIL VID RVID

VID X = 0 V

VID code change to FB change VID code change to PWM
going low
fOSC fPHASE

VRT VRAMPADJ IRAMPADJ

TA = 25°C, RT = 250 kΩ, 4-phase TA = 25°C, RT = 115 kΩ, 4-phase TA = 25°C, RT = 75 kΩ, 4-phase RT = 100 kΩ to GND

RAMPADJ FB

VOS CSA

IBIAS CSSUM GBW CSA

CSSUM CSREF, Figure 3 TSSOP QSOP

CCSCOMP = 10 pF CSSUM and CSREF

ADP3186

Unit
−13
100 500 20 25
−17

V/us
−50
−3 −50

V/us

ADP3186

Parameter Positioning Accuracy Output Voltage Range Output Current
ORDERING GUIDE

Model ADP3186JRUZ-REEL1 ADP3186JRQZ-REEL1

Temperature Range 0°C to 85°C 0°C to 85°C
1 Z = Pb-free part.

Package Description 28-Lead TSSOP 28-Lead QSOP

Package Option RU-28 RQ-28

Quantity per Reel 2500
2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.

D04914-0-3/06 A

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ADP3186JRUZ-REEL Datasheet file may be downloaded here without warranties.

Datasheet ID: ADP3186JRUZ-REEL 517854