ADP3166JRU-REEL

ADP3166JRU-REEL Datasheet

ADP3166*

Part	Datasheet
ADP3166JRU-REEL	ADP3166JRU-REEL (pdf)

Related Parts	Information
ADP3166JRU-REEL7	ADP3166JRU-REEL7
ADP3166JRUZ-REEL	ADP3166JRUZ-REEL

PDF Datasheet Preview
5-Bit Programmable 2-, 3-, 4-Phase Synchronous Buck Controller ADP3166* FEATURES Selectable 2-, 3- or 4-Phase Operation at up to 1 MHz per Phase Differential Sensing Error ±1% over Temperature Logic-Level PWM Outputs for Interface to External High Power Drivers Active Current Balancing between All Output Phases Built-in Power Good Blanking Supports On-the-Fly VID Code Changes 5-Bit Digitally Programmable V to V Output Short-Circuit Protection with Programmable Latch-Off Delay Overvoltage Protection Crowbar Logic Output APPLICATIONS Desktop PC Power Supplies Next-Generation AMD Processors VRM Modules GENERAL DESCRIPTION The ADP3166 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. The ADP3166 also uses a multimode PWM architecture to drive the logic-level outputs at a programmable switching frequency that can be optimized for VRM size and efficiency. The phase relationship of the output signals can be programmed to provide 2-, 3-, or 4-phase operation, allowing for the construction of up to four complementary buck switching stages. The ADP3166 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 ADP3166 also provides accurate and reliable short-circuit protection, adjustable current limiting, and a delayed power good output that accommodates on-the-fly output voltage changes requested by the CPU. ADP3166 is specified over the commercial temperature range of 0°C to 85°C and is available in a 28-lead TSSOP package. FUNCTIONAL BLOCK DIAGRAM VCC 28 ADP3166 EN 11 UVLO SHUTDOWN AND BIAS GND 19 CROWBAR 6 CSREF + 2.1V DAC + 300mV + CSREF DAC 300mV PWRGD 10 DELAY ILIMIT 15 EN RAMPADJ RT OSCILLATOR CURRENT BALANCING CIRCUIT SET EN RESET 27 PWM1 + CMP RESET 2-, 3- , 4-PHASE DRIVER LOGIC RESET 26 PWM2 25 PWM3 RESET 24 PWM4 CROWBAR CURRENT LIMIT ORDERING GUIDE Temperature Range 0°C to 85°C 0°C to 85°C Package Options Quantity per Reel RU-28 TSSOP-28 1000 RU-28 TSSOP-28 2500 SUPPLY CURRENT mA MASTER CLOCK FREQUENCY MHz TA = 4-PHASE OPERATION 0 MASTER CLOCK FREQUENCY MHz TPC Supply Current vs. Master Clock Frequency RT VALUE TPC Master Clock Frequency vs. RT CAUTION ESD electrostatic discharge sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADP3166 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. ADP3166 1 VID4 VCC 28 2 VID3 PWM1 27 5-BIT CODE 3 VID2 4 VID1 PWM2 26 PWM3 25 5 VID0 PWM4 24 6 CROWBAR SW1 23 7 FBRTN SW2 22 SW3 21 9 COMP 10 PWRGD SW4 20 GND 19 1.25V 11 EN 12 DELAY 4.7nF 13 RT CSCOMP 18 CSSUM 17 CSREF 16 14 RAMPADJ ILIMIT 15 12V 100nF 100nF Test Circuit Closed-Loop Output Voltage Accuracy ADP3166 VCC 28 CSCOMP 18 100nF

PDF Datasheet Preview

5-Bit Programmable 2-, 3-, 4-Phase Synchronous Buck Controller

ADP3166*

FEATURES Selectable 2-, 3- or 4-Phase Operation at up to
1 MHz per Phase Differential Sensing Error ±1% over Temperature Logic-Level PWM Outputs for Interface to

External High Power Drivers Active Current Balancing between All Output Phases Built-in Power Good Blanking Supports On-the-Fly

VID Code Changes 5-Bit Digitally Programmable V to V Output Short-Circuit Protection with Programmable

Latch-Off Delay Overvoltage Protection Crowbar Logic Output

APPLICATIONS Desktop PC Power Supplies

Next-Generation AMD Processors VRM Modules

GENERAL DESCRIPTION The ADP3166 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. The ADP3166 also uses a multimode PWM architecture to drive the logic-level outputs at a programmable switching frequency that can be optimized for VRM size and efficiency. The phase relationship of the output signals can be programmed to provide 2-, 3-, or 4-phase operation, allowing for the construction of up to four complementary buck switching stages.

The ADP3166 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 ADP3166 also provides accurate and reliable short-circuit protection, adjustable current limiting, and a delayed power good output that accommodates on-the-fly output voltage changes requested by the CPU.

ADP3166 is specified over the commercial temperature range of 0°C to 85°C and is available in a 28-lead TSSOP package.

FUNCTIONAL BLOCK DIAGRAM

VCC 28

ADP3166

EN 11

UVLO SHUTDOWN

AND BIAS

GND 19

CROWBAR 6

CSREF + 2.1V

DAC + 300mV +

CSREF

DAC 300mV

PWRGD 10

DELAY

ILIMIT 15 EN

RAMPADJ RT

OSCILLATOR

CURRENT BALANCING

CIRCUIT

SET EN

RESET
27 PWM1
+ CMP

RESET 2-, 3- , 4-PHASE DRIVER LOGIC RESET
26 PWM2 25 PWM3

RESET
24 PWM4

CROWBAR

CURRENT LIMIT
ORDERING GUIDE

Temperature Range
0°C to 85°C 0°C to 85°C

Package Options

Quantity per Reel

RU-28 TSSOP-28 1000 RU-28 TSSOP-28 2500

SUPPLY CURRENT mA MASTER CLOCK FREQUENCY MHz

TA = 4-PHASE OPERATION
0 MASTER CLOCK FREQUENCY MHz

TPC Supply Current vs. Master Clock Frequency

RT VALUE

TPC Master Clock Frequency vs. RT

CAUTION ESD electrostatic discharge sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADP3166 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

ADP3166
1 VID4

VCC 28
2 VID3

PWM1 27
5-BIT CODE
3 VID2 4 VID1

PWM2 26 PWM3 25
5 VID0

PWM4 24
6 CROWBAR SW1 23
7 FBRTN

SW2 22

SW3 21
9 COMP 10 PWRGD

SW4 20 GND 19
1.25V
11 EN
12 DELAY 4.7nF 13 RT

CSCOMP 18 CSSUM 17 CSREF 16
14 RAMPADJ

ILIMIT 15
12V 100nF
100nF

Test Circuit Closed-Loop Output Voltage Accuracy

ADP3166

VCC 28

CSCOMP 18 100nF

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 ADP3166JRU-REEL Datasheet file may be downloaded here without warranties.

Datasheet ID: ADP3166JRU-REEL 517851