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What is MAX8772?

This electronic component, produced by the manufacturer "Maxim Integrated Products", performs the same function as "(MAX8770 - MAX8772) PWM Controller".


MAX8772 Datasheet PDF - Maxim Integrated Products

Part Number MAX8772
Description (MAX8770 - MAX8772) PWM Controller
Manufacturers Maxim Integrated Products 
Logo Maxim Integrated Products Logo 


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CONFIDENTIAL INFORMATION – RESTRICTED TO INTEL® IMVP-6 LICENSEES
19-3913; Rev 0; 10/05
MAX8770/MAX8771/MAX8772 Dual-Phase, Quick-
PWM Controller for IMVP-6+ CPU Core Power Supplies
General Description
The MAX8770/MAX8771/MAX8772 are 2/1-phase inter-
leaved Quick-PWM™ step-down VID power-supply con-
trollers for notebook CPUs. True out-of-phase operation
reduces input ripple current requirements and output volt-
age ripple while easing component selection and layout
difficulties. The Quick-PWM control provides instanta-
neous response to fast load current steps. Active voltage
positioning reduces power dissipation and bulk output
capacitance requirements and allows ideal positioning
www.DcaotamSphenest4aUti.ocnomfor tantalum, polymer, or ceramic bulk out-
put 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 single-
stage 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 possi-
ble 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 thermal-
fault 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 sequenc-
ing. 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 sig-
nals. The MAX8770/MAX8771/MAX8772 are available in a
40-pin TQFN package.
Applications
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.
Features
Single/Dual-Phase, Quick-PWM Controller
±0.4% 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 www.maxim-ic.com.

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MAX8772 equivalent
CONFIDENTIAL INFORMATION – RESTRICTED TO INTEL® IMVP-6 LICENSEES
MAX8770/MAX8771/MAX8772 Dual-Phase, Quick-
PWM Controller for IMVP-6+ CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. VDD = VCC = VSHDN = VPSI = VDPRSTP = 5V, DPRSLPVR = GNDS = PGND_ = GND, VFB = VCCI = VCSP_ = VCSN_
= 1.200V, D0–D6 set for 1.20V (D0–D6 = 0001100). TA = 0°C to +85°C, unless otherwise specified. Typical values are at TA = +25°C.)
PARAMETER
DROOP AND BALANCE
DC Droop Amplifier Offset
DC Droop Amplifier
Transconductance
www.DataSheet4U.com
Current-Balance
Preamplifier Offset
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Gm(FB)
IFB/(Σ∆VCS),
VFB = VCSN_ = 1.2V,
VCSP_ - VCSN_ = 0 to +60mV
-1.0
+1.0
mV
590 600 610
µS
[V(CSP1, CSN_) - V(CSP2, CSN_)] at ICCI = 0
-1.0
+1.0
mV
Current-Balance Amplifier
Transconductance
Gm(CCI)
ICCI/[V(CSP1, CSN_), V(CSP2, CSN_)]
CCI = FB = CSN_ = 0.45V to 1.5V, and
V(CSP_, CSN_) = -10mV to +10mV
CURRENT LIMIT
Valley Current-Limit Threshold
(Positive)
VLIMIT CSP_ - CSN_
Valley Current-Limit Threshold
(Negative)
CSP_, CSN_
Zero Crossing Threshold
Current-Sense Input Current
VZX PGND1 - LX1, DPRSLPVR = high (skip mode)
CSP_
CSN_
CSN12 (MAX8771)
Common-Sense Common-Mode
Input Range
CSP_ -CSN_
Phase 2 Disable Threshold
Gate Drivers
GATE DRIVERS
DH_ Gate Driver
On-Resistance
DL_ Gate Driver
On-Resistance
CSP2
RON(DH_)
RON(DL_)
BST_ -LX_ forced
to 5V
High state (pullup)
Low state (pulldown)
High state (pullup)
Low state (pulldown)
DH_ Gate Driver Source/Sink
Current
IDH DH_ forced to 2.5V, BST_ - LX_ forced to 5V
DL_ Gate Driver Source Current
DL_ Gate Driver Sink Current
Driver Propagation Delay
IDL(SOURCE)
IDL(SINK)
DL_ forced to 2.5V
DL_ forced to 2.5V
DH_ low to DL_ high
DL_ low to DH_ high
DL_ Transition Time
DH_ Transition Time
DL_ falling, CDL_ = 3nF
DL_ rising, CDL_ = 3nF
DH_ falling, CDH_ = 3nF
DH_ rising, CDH_ = 3nF
200 µS
19.5 22.5 25.5
mV
-35 -30 -25 mV
2.5 mV
-0.2 +0.2
-0.2
+0.2
µA
-0.4 +0.4
02
V
3 VCC - 1 VCC - 0.4
0.9 2.5
0.7 2.5
0.7 2.0
0.25 0.5
2.2
2.7
8
18 25
9 20
20
20
20
20
A
A
A
ns
ns
ns
_______________________________________________________________________________________ 5


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