MAX8770GTL+

MAX8770GTL+ Datasheet

MAX8770/MAX8771/MAX8772

Part	Datasheet
MAX8770GTL+	MAX8770GTL+ (pdf)

Related Parts	Information
MAX8770GTL+T	MAX8770GTL+T

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CONFIDENTIAL INFORMATION RESTRICTED TO IMVP-6 LICENSEES MAX8770/MAX8771/MAX8772 MAX8770/MAX8771/MAX8772 Dual-Phase, QuickPWM Controller for IMVP-6+ CPU Core Power Supplies The MAX8770/MAX8771/MAX8772 are 2/1-phase interleaved Quick-PWM step-down VID power-supply controllers for notebook CPUs. True out-of-phase operation reduces input ripple current requirements and output voltage ripple while easing component selection and layout difficulties. The Quick-PWM control provides instantaneous response to fast load current steps. Active voltage positioning reduces power dissipation and bulk output capacitance requirements and allows ideal positioning compensation for tantalum, polymer, or ceramic bulk output capacitors. The MAX8770/MAX8771/MAX8772 are intended for two different notebook CPU core applications either bucking down the battery directly to create the core voltage, or else bucking down the +5V system supply. The singlestage conversion method allows this device to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, 2-stage conversion stepping down the +5V system supply instead of the battery at higher switching frequency provides the minimum possible physical size. A slew-rate controller allows controlled transitions between VID codes, controlled soft-start and shutdown, and controlled exit from suspend. A thermistor-based temperature sensor provides a programmable thermalfault output VRHOT . A power-monitor output POUT provides an analog voltage output proportional to the power consumed by the CPU. The MAX8770/MAX8771/ MAX8772 include output undervoltage protection UVP and thermal protection, and the MAX8770/MAX8771 also include overvoltage protection OVP . When any of these protection features detect a fault, the controller shuts down. A voltage-regulator power-OK PWRGD output indicates the output is in regulation. A clock enable CLKEN output provides proper system startup sequencing. Additionally, the MAX8771 has a phase-good PHASEGD output, and the MAX8770/MAX8772 includes true differential current sense. The MAX8770/MAX8771/MAX8772 implement the Intel IMVP-6+ code set and the required IMVP-6+ control signals. The MAX8770/MAX8771/MAX8772 are available in a 40-pin TQFN package. IMVP-6+ Core Supply Multiphase CPU Core Supply Voltage-Positioned, Step-Down Converters Notebook/Desktop Computers Blade Servers Intel is a registered trademark of Intel, Corp. Quick-PWM is a trademark of Maxim Integrated Products, Inc. Single/Dual-Phase, Quick-PWM Controller VOUT Accuracy Over Line, Load, and Temperature 7-Bit On-Board DAC 0 to +1.5000V Output Adjust Range Dynamic Phase Selection Optimizes Active/Sleep Efficiency Transient Phase Overlap Reduces Output Capacitance Integrated Boost Switches Active Voltage Positioning with Adjustable Gain Programmable 200kHz to 600kHz Switching Frequency Accurate Current Balance and Current Limit Adjustable Slew-Rate Control Power-Good PWRGD , Clock Enable CLKEN , Power Monitor POUT and Thermal Fault VRHOT Outputs Phase Fault PHASEGD Output MAX8771 Drives Large Synchronous Rectifier MOSFETs 4V to 26V Battery-Input-Voltage Range Output OV Protection MAX8770/MAX8771 UV and Thermal-Fault Protection Power Sequencing and Timing Soft-Startup and Soft-Shutdown Ordering Information PART TEMP PIN-PACKAGE MAX8770GTL+ -40°C to +105°C 40 Thin QFN 6mm x 6mm MAX8771GTL+ -40°C to +105°C 40 Thin QFN 6mm x 6mm MAX8772GTL+ -40°C to +105°C 40 Thin QFN 6mm x 6mm +Denotes lead-free package. Pin Configuration appears at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at MAX8770/MAX8771/MAX8772 CONFIDENTIAL INFORMATION RESTRICTED TO IMVP-6 LICENSEES MAX8770/MAX8771/MAX8772 Dual-Phase, QuickPWM Controller for IMVP-6+ CPU Core Power Supplies ABSOLUTE MAXIMUM RATINGS VCC, VDD to GND to +6V CSP_ to +6V CSN12 MAX8771 to GND to +6V CSN_ MAX8770/MAX8772 to GND........................-0.3V to +6V PHASEGD MAX8771 to +6V THRM, VRHOT, CLKEN to GND...............................-0.3V to +6V TIME, PWRGD, POUT to GND ......................-0.3V to VCC + 0.3V REF, FB, CCV, CCI to GND ..........................-0.3V to VCC + 0.3V SHDN to GND Note to +14V TON to GND to +30V DPRSLPVR, DPRSTP, PSI to GND ...........................-0.3V to +6V GNDS, PGND_ to GND to +0.3V DL_ to VDD + 0.3V BST_ to GND to +36V LX_ to BST_ to +0.3V BST_ to +30V DH_ to LX_ to VBST_ +0.3V REF Short Circuit to GND Continuous Power Dissipation 40-Pin 6mm x 6mm Thin QFN derate 23.2mW/°C above +70°C .............................2051mW Operating Temperature Range .........................-40°C to +105°C Junction Temperature Storage Temperature Range .............................-65°C to +165°C Lead Temperature soldering, 10s .................................+300°C Note 1 SHDN may be forced to 12V for the purpose of debugging prototype boards using the no-fault test mode, which disables fault protection and disables overlapping operation. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS Circuit of Figure VDD = VCC = VSHDN = VPSI = VDPRSTP = 5V, DPRSLPVR = GNDS = PGND_ = GND, VFB = VCCI = VCSP_ = VCSN_ = 1.200V, set for 1.20V = TA = 0°C to +85°C, unless otherwise specified. Typical values are at TA = +25°C. PARAMETER PWM CONTROLLER Input Voltage Range DC Output-Voltage Accuracy Boot Voltage GNDS Input Range GNDS Gain GNDS Input Bias Current FB Input Bias Current On-Time Accuracy Note 3 TON Shutdown Input Current Minimum FB and CCI Voltages for Pseudo-Fixed-Frequency Operation Minimum Off-Time VOUT VBOOT VGNDS AGNDS IGNDS IFB tON tOFF MIN CONDITIONS VCC, VDD Includes loadregulation error Note 2 DAC codes from 0.8375V to 1.500V DAC codes from 0.500V to 0.825V DAC codes below 0.4875V -200mV VGNDS +200mV CSP_ = CSN_ for both enabled phases VIN = 12V VFB = VCCI = 1.2V RTON = RTON = RTON = SHDN = 0, VIN = 26V, VCC = VDD = 0 or 5V Switching frequency is reduced if FB and/or CCI are less than this value Note 3 MIN TYP MAX UNITS -200 +200 mV MAX8770/MAX8771/MAX8772 CONFIDENTIAL INFORMATION RESTRICTED TO IMVP-6 LICENSEES MAX8770/MAX8771/MAX8772 Dual-Phase, QuickPWM Controller for IMVP-6+ CPU Core Power Supplies ELECTRICAL CHARACTERISTICS continued

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CONFIDENTIAL INFORMATION RESTRICTED TO IMVP-6 LICENSEES

MAX8770/MAX8771/MAX8772

MAX8770/MAX8771/MAX8772 Dual-Phase, QuickPWM Controller for IMVP-6+ CPU Core Power Supplies

The MAX8770/MAX8771/MAX8772 are 2/1-phase interleaved Quick-PWM step-down VID power-supply controllers for notebook CPUs. True out-of-phase operation reduces input ripple current requirements and output voltage ripple while easing component selection and layout difficulties. The Quick-PWM control provides instantaneous response to fast load current steps. Active voltage positioning reduces power dissipation and bulk output capacitance requirements and allows ideal positioning compensation for tantalum, polymer, or ceramic bulk output capacitors.

The MAX8770/MAX8771/MAX8772 are intended for two different notebook CPU core applications either bucking down the battery directly to create the core voltage, or else bucking down the +5V system supply. The singlestage conversion method allows this device to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, 2-stage conversion stepping down the +5V system supply instead of the battery at higher switching frequency provides the minimum possible physical size.

A slew-rate controller allows controlled transitions between VID codes, controlled soft-start and shutdown, and controlled exit from suspend. A thermistor-based temperature sensor provides a programmable thermalfault output VRHOT . A power-monitor output POUT provides an analog voltage output proportional to the power consumed by the CPU. The MAX8770/MAX8771/ MAX8772 include output undervoltage protection UVP and thermal protection, and the MAX8770/MAX8771 also include overvoltage protection OVP . When any of these protection features detect a fault, the controller shuts down. A voltage-regulator power-OK PWRGD output indicates the output is in regulation. A clock enable CLKEN output provides proper system startup sequencing. Additionally, the MAX8771 has a phase-good PHASEGD output, and the MAX8770/MAX8772 includes true differential current sense.

The MAX8770/MAX8771/MAX8772 implement the Intel IMVP-6+ code set and the required IMVP-6+ control signals. The MAX8770/MAX8771/MAX8772 are available in a 40-pin TQFN package.

IMVP-6+ Core Supply

Multiphase CPU Core Supply

Voltage-Positioned, Step-Down Converters

Notebook/Desktop Computers

Blade Servers

Intel is a registered trademark of Intel, Corp.

Quick-PWM is a trademark of Maxim Integrated Products, Inc.

Single/Dual-Phase, Quick-PWM Controller VOUT Accuracy Over Line, Load, and

Temperature 7-Bit On-Board DAC 0 to +1.5000V Output Adjust

Range Dynamic Phase Selection Optimizes Active/Sleep

Efficiency Transient Phase Overlap Reduces Output

Capacitance Integrated Boost Switches Active Voltage Positioning with Adjustable Gain Programmable 200kHz to 600kHz Switching

Frequency Accurate Current Balance and Current Limit Adjustable Slew-Rate Control Power-Good PWRGD , Clock Enable CLKEN ,

Power Monitor POUT and Thermal Fault VRHOT Outputs Phase Fault PHASEGD Output MAX8771 Drives Large Synchronous Rectifier MOSFETs 4V to 26V Battery-Input-Voltage Range Output OV Protection MAX8770/MAX8771 UV and Thermal-Fault Protection Power Sequencing and Timing Soft-Startup and Soft-Shutdown
Ordering Information

PART

TEMP

PIN-PACKAGE

MAX8770GTL+ -40°C to +105°C 40 Thin QFN 6mm x 6mm

MAX8771GTL+ -40°C to +105°C 40 Thin QFN 6mm x 6mm

MAX8772GTL+ -40°C to +105°C 40 Thin QFN 6mm x 6mm
+Denotes lead-free package.

Pin Configuration appears at end of data sheet.

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at

MAX8770/MAX8771/MAX8772

CONFIDENTIAL INFORMATION RESTRICTED TO IMVP-6 LICENSEES

MAX8770/MAX8771/MAX8772 Dual-Phase, QuickPWM Controller for IMVP-6+ CPU Core Power Supplies

ABSOLUTE MAXIMUM RATINGS

VCC, VDD to GND to +6V CSP_ to +6V CSN12 MAX8771 to GND to +6V CSN_ MAX8770/MAX8772 to GND........................-0.3V to +6V PHASEGD MAX8771 to +6V THRM, VRHOT, CLKEN to GND...............................-0.3V to +6V TIME, PWRGD, POUT to GND ......................-0.3V to VCC + 0.3V REF, FB, CCV, CCI to GND ..........................-0.3V to VCC + 0.3V SHDN to GND Note to +14V TON to GND to +30V DPRSLPVR, DPRSTP, PSI to GND ...........................-0.3V to +6V GNDS, PGND_ to GND to +0.3V DL_ to VDD + 0.3V

BST_ to GND to +36V LX_ to BST_ to +0.3V BST_ to +30V DH_ to LX_ to VBST_ +0.3V REF Short Circuit to GND Continuous Power Dissipation 40-Pin 6mm x 6mm Thin QFN
derate 23.2mW/°C above +70°C .............................2051mW Operating Temperature Range .........................-40°C to +105°C Junction Temperature Storage Temperature Range .............................-65°C to +165°C Lead Temperature soldering, 10s .................................+300°C

Note 1 SHDN may be forced to 12V for the purpose of debugging prototype boards using the no-fault test mode, which disables fault protection and disables overlapping operation.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

Circuit of Figure VDD = VCC = VSHDN = VPSI = VDPRSTP = 5V, DPRSLPVR = GNDS = PGND_ = GND, VFB = VCCI = VCSP_ = VCSN_ = 1.200V, set for 1.20V = TA = 0°C to +85°C, unless otherwise specified. Typical values are at TA = +25°C.

PARAMETER PWM CONTROLLER Input Voltage Range

DC Output-Voltage Accuracy

Boot Voltage GNDS Input Range GNDS Gain GNDS Input Bias Current FB Input Bias Current

On-Time Accuracy Note 3

TON Shutdown Input Current Minimum FB and CCI Voltages for Pseudo-Fixed-Frequency Operation Minimum Off-Time

VOUT

VBOOT VGNDS AGNDS IGNDS

IFB tON
tOFF MIN

CONDITIONS

VCC, VDD

Includes loadregulation error Note 2

DAC codes from 0.8375V to 1.500V

DAC codes from 0.500V to 0.825V

DAC codes below 0.4875V
-200mV VGNDS +200mV

CSP_ = CSN_ for both enabled phases

VIN = 12V VFB = VCCI = 1.2V

RTON = RTON = RTON =

SHDN = 0, VIN = 26V, VCC = VDD = 0 or 5V

Switching frequency is reduced if FB and/or CCI are less than this value

Note 3

MIN TYP MAX UNITS
-200
+200 mV

MAX8770/MAX8771/MAX8772

CONFIDENTIAL INFORMATION RESTRICTED TO IMVP-6 LICENSEES

MAX8770/MAX8771/MAX8772 Dual-Phase, QuickPWM Controller for IMVP-6+ CPU Core Power Supplies

ELECTRICAL CHARACTERISTICS continued

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Datasheet ID: MAX8770GTL+ 647411