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PDF MAX17480 Data sheet ( Hoja de datos )
| Número de pieza | MAX17480 | |
| Descripción | AMD 2-/3-Output Mobile Serial VID Controller | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-4443; Rev 0; 2/09
www.DataSheet4EUV.cAAoLVmUAAILTAIOBNLEKIT
AMD 2-/3-Output Mobile Serial
VID Controller
General Description
The MAX17480 is a triple-output, step-down, fixed-
frequency controller for AMD’s serial VID interface (SVI)
CPU and northbridge (NB) core supplies. The MAX17480
consists of two high-current SMPSs for the CPU cores
and one 4A internal switch SMPS for the NB core. The
two CPU core SMPSs run 180° out-of-phase for true
interleaved operation, minimizing input capacitance.
The 4A internal switch SMPS runs at twice the switching
frequency of the core SMPS, reducing the size of the
external components.
The MAX17480 is fully AMD SVI compliant. Output volt-
ages are dynamically changed through a 2-wire SVI,
allowing the SMPSs to be individually programmed to
different voltages. A slew-rate controller allows con-
trolled transitions between VID codes and controlled
soft-start. SVI also allows each SMPS to be individually
set into a low-power pulse-skipping state.
Transient phase repeat improves the response of the
fixed-frequency architecture, reducing the total output
capacitance for the CPU core. A thermistor-based tem-
perature sensor provides a programmable thermal-fault
output (VRHOT).
The MAX17480 includes output overvoltage protection
(OVP), undervoltage protection (UVP), and thermal pro-
tection. When any of these protection features detect a
fault, the controller shuts down. True differential current
sensing improves current limit and load-line accuracy.
The MAX17480 has an adjustable switching frequency,
allowing 100kHz to 600kHz operation per core SMPS,
and twice that for the NB SMPS.
Applications
Mobile AMD SVI Core Supplies
Multiphase CPU Core Supplies
Voltage-Positioned, Step-Down Converters
Notebook/Desktop Computers
Pin Configuration appears at end of data sheet.
Features
o Dual-Output Fixed-Frequency Core Supply
Controller
Split or Combinable Outputs Detected at
Power-Up
Dynamic Phase Selection Optimizes
Active/Sleep Efficiency
Transient Phase Repeat Reduces Output
Capacitance
True Out-of-Phase Operation Reduces Input
Capacitance
Programmable AC and DC Droop
Accurate Current Balance and Current Limit
Integrated Drivers for Large Synchronous-
Rectifier MOSFETs
Programmable 100kHz to 600kHz Switching
Frequency
4V to 26V Battery Input Voltage Range
o 4A Internal Switch Northbridge SMPS
2.7V to 5.5V Input Voltage Range
2x Programmable Switching Frequency
75mΩ/40mΩ Power Switches
o ±0.5% VOUT Accuracy over Line, Load, and
Temperature
o AMD SVI-Compliant Serial Interface with
Switchable Address
o 7-Bit On-Board DAC: 0 to +1.550V Output Adjust
Range
o Integrated Boost Switches
o Adjustable Slew-Rate Control
o Power-Good (PWRGD) and Thermal-Fault
(VRHOT) Outputs
o System Power-OK (PGD_IN) Input
o Overvoltage, Undervoltage, and Thermal-Fault
Protection
o Voltage Soft-Startup and Passive Shutdown
o < 1µA Typical Shutdown Current
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX17480GTL+
-40°C to +105°C
40 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
www.DataSheet4U.com
AMD 2-/3-Output Mobile Serial
VID Controller
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 2, VIN = 12V, VCC = VDD = VIN3 = SHDN = PGD_IN = 5V, VDDIO = 1.8V, OPTION = GNDS_ = AGND = PGND,
FBDC_ = FBAC_ = OUT3 = CSP_ = CSN_ = 1.2V, all DAC codes set to the 1.2V code, TA = 0°C to +85°C, unless otherwise noted.
Typical values are at TA = +25°C.)
PARAMETER
FAULT DETECTION
Output Overvoltage Trip
Threshold
(SMPS1 and SMPS2 Only)
Output Overvoltage Fault
Propagation Delay (SMPS1 and
SMPS2 Only)
Output Undervoltage Protection
Trip Threshold
Output Undervoltage Fault
Propagation Delay
PWRGD Threshold
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VOVP_
Measured at
FBDC_, rising
edge
PWM mode
Skip mode and output
has not reached the
regulation voltage
Minimum OVP
threshold
250
1.80
300
1.85
0.8
350
1.90
tOVP FBDC_ forced 25mV above trip threshold
10
VUVP
tUVP
Measured at FBDC_ or OUT3 with respect
to unloaded output voltage
FBDC_ forced 25mV below trip threshold
Measured at
FBDC_ or OUT3
with respect to
unloaded output
voltage,15mV
hysteresis (typ)
Lower threshold,
falling edge
(undervoltage)
Upper threshold,
rising edge
(overvoltage)
-450 -400 -350
10
-350 -300 -250
+150 +200 +250
mV
V
µs
mV
µs
mV
PWRGD Propagation Delay
PWRGD, Output Low Voltage
PWRGD Leakage Current
PWRGD Startup Delay and
Transition Blanking Time
VRHOT Trip Threshold
VRHOT Delay
VRHOT, Output Low Voltage
VRHOT Leakage Current
THRM Input Leakage
Thermal-Shutdown Threshold
GATE DRIVERS
DH_ Gate-Driver On-Resistance
DL_ Gate-Driver On-Resistance
tPWRGD
IPWRGD
tBLANK
tVRHOT
TSHDN
FBDC_ or OUT3 forced 25mV outside the
PWRGD trip thresholds
ISINK = 4mA
High state, PWRGD forced to 5.5V,
TA = +25°C
Measured from the time when FBDC_ and
OUT3 reach the target voltage
Measured at THRM, with respect to VCC,
falling edge, 115mV hysteresis (typ)
THRM forced 25mV below the VRHOT trip
threshold, falling edge
ISINK = 4mA
High state, VRHOT forced to 5V, TA = +25°C
TA = +25°C
Hysteresis = 15°C
29.5
-100
RON(DH_)
BST_ - LX_ forced
to 5V (Note 4)
DL_, high state
RON(DL_)
DL_, low state
High state (pullup)
Low state (pulldown)
10
0.4
1
20
30 30.5
10
+160
0.4
1
+100
0.9 2.5
0.7 2.5
0.7 2.0
0.25 0.6
µs
V
µA
µs
%
µS
V
µA
nA
°C
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
AMD 2-/3-Output Mobile Serial
VID Controller
Typical Operating Characteristics
(Circuit of Figure 2, VIN = 12V, VDD = VCC = 5V, VDDIO = 2.5V, TA = +25°C, unless otherwise noted.)
CORE SMPS 1-PHASE EFFICIENCY
vs. LOAD CURRENT (VOUT = 1.2V)
100
7V
CORE SMPS 2-PHASE EFFICIENCY
vs. LOAD CURRENT (VOUT = 1.2V)
100
PWM MODE
CORE SMPS OUTPUT VOLTAGE
vs. LOAD CURRENT (VOUT = 1.2V)
1.205
VIN = 12V
90
12V
80
20V
70
60
0.1
SKIP MODE
PWM MODE
1 10
LOAD CURRENT (A)
100
CORE SMPS 1-PHASE EFFICIENCY
vs. LOAD CURRENT (VOUT = 0.8V)
100
7V 12V
90
80
70
60
0.1
20V
SKIP MODE
PWM MODE
1 10
LOAD CURRENT (A)
100
NB SMPS 1V OUTPUT VOLTAGE
vs. LOAD CURRENT
1.05
1.03
VIN = 5V
1.01
0.99
VIN = 3.3V
0.97
0.95
0
SKIP MODE
PWM MODE
123
LOAD CURRENT (A)
4
90
80 20V
12V
70 7V
1.200
SKIP MODE AND PWM MODE
1.195
60
1
10
LOAD CURRENT (A)
100
CORE SMPS OUTPUT VOLTAGE
vs. LOAD CURRENT (VOUT = 0.8V)
0.805
VIN = 12V
0.800
SKIP MODE AND PWM MODE
0.795
0.790
0
5 10 15
LOAD CURRENT (A)
20
CORE SMPS 1-PHASE SWITCHING
FREQUENCY vs. LOAD CURRENT
350
VOUT = 1.2V
300
VIN = 20V SKIP
250 VIN = 20V PWM
200
VIN = 12V SKIP
VIN = 12V PWM
150
VIN = 7V SKIP
VIN = 7V PWM
100
0.1
1 10
LOAD CURRENT (A)
100
1.190
0
100
90
5 10 15
LOAD CURRENT (A)
NB SMPS EFFICIENCY
vs. LOAD CURRENT (1V)
3.3V
20
80
70
60
0.1
5V
SKIP MODE
PWM MODE
1
LOAD CURRENT (A)
10
NB SMPS SWITCHING FREQUENCY
vs. LOAD CURRENT
750
VOUT = 1V
700
650
600
550
500
450
400
0
VIN = 3.3V SKIP
VIN = 5V PWM
VIN = 3.3V SKIP
VIN = 5V PWM
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
LOAD CURRENT (A)
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 48 Páginas | |
| PDF Descargar | [ Datasheet MAX17480.PDF ] | |
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