|
|
PDF MAX8771 Data sheet ( Hoja de datos )
| Número de pieza | MAX8771 | |
| Descripción | (MAX8770 - MAX8772) PWM Controller | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX8771 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
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.
1 page  
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
Ω
Ω
A
A
A
ns
ns
ns
_______________________________________________________________________________________ 5
5 Page 
CONFIDENTIAL INFORMATION – RESTRICTED TO INTEL® IMVP-6 LICENSEES
MAX8770/MAX8771/MAX8772 Dual-Phase, Quick-
PWM Controller for IMVP-6+ CPU Core Power Supplies
Typical Operating Characteristics (continued)
(Circuit of Figure 1. VIN = 12V, VCC = VDD, SHDN = PSI = 5V, DPRSLPVR = GND, D0–D6 set for 1.1500V, TA = 25°C, unless other-
wise specified.)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE AT SKIP MODE
10
ICC + IDD
REFERENCE VOLTAGE DISTRIBUTION
100
SAMPLE SIZE = 200
80
OUTPUT OFFSET VOLTAGE DISTRIBUTION
100
1.2000V
SAMPLE SIZE = 200
0.8125V
80
1
www.DataSheet4U.com
60
60
40 40
0.1
IIN
0.01
0
5
DPRSLPVR = VCC
10 15 20
INPUT VOLTAGE (V)
25
20
0
1.990
Gm(FB) TRANSCONDUCTANCE
DISTRIBUTION
100
SAMPLE SIZE = 200
20
2.000
REFERENCE VOLTAGE (V)
2.010
0
-3 -2 -1
1
2
OUTPUT OFFSET VOLTAGE (mV)
INDUCTOR CURRENT DIFFERENCE
vs. LOAD CURRENT
0.3
3
80
0.2
60
40
20
0
595
597 599 601 603
TRANSCONDUCTANCE (µS)
605
SOFT-START (UP TO PWRGD)
MAX8770 toc14
A
0
0B
0C
0D
E
0
F
0
G
0 RLOAD = 65mΩ
1ms/div
A. SHDN, 5V/div
B. CLKEN, 10V/div
C. PWRGD, 10V/div
D. PHASEGD, 10V/div
E. VOUT, 1V/div
F. ILXI, 10A/div
G. ILX2, 10V/div
0.1
RSENSE = 1mΩ
0
0 5 10 15 20 25
INPUT VOLTAGE (V)
SOFT-START (UP TO CLKEN)
MAX8770 toc15
A
0
0B
C
0
D
0
E
0
F
0 RLOAD = 65mΩ
200µs/div
A. SHDN, 5V/div
B. CLKEN, 10V/div
C. LX1, 10V/div
D. VOUT, 1V/div
E. ILXI, 10A/div
F. ILX2, 10V/div
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX8771.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX877 | 5V/3.3V/3V/Adjustable-Output / Step-Up/Step-Down DC-DC Converters |  Maxim Integrated |
| MAX8770 | (MAX8770 - MAX8772) PWM Controller | Maxim Integrated Products |
| MAX8771 | (MAX8770 - MAX8772) PWM Controller | Maxim Integrated Products |
| MAX8772 | (MAX8770 - MAX8772) PWM Controller | Maxim Integrated Products |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |