19-4372; Rev 2; 7/09
Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
0/MAX17482
General Description
Features
o Single-/Dual-Phase, Quick-PWM Controllers
The MAX17021/MAX17082/MAX17482 are 2/1-phase-
interleaved Quick-PWM™ step-down VID power-supply
controllers for notebook CPUs. True out-of-phase oper-
ation reduces input ripple current requirements and
output- voltage ripple, while easing component selec-
tion and layout difficulties. The Quick-PWM control pro-
vides instantaneous response to fast load-current
steps. Active voltage positioning reduces power dissi-
pation and bulk output capacitance requirements and
allows ideal positioning compensation for tantalum,
polymer, or ceramic bulk output capacitors.
o MAX17021 IMVP-6+ (Montevina)
o MAX17082/MAX17482 IMVP-6.5 (Calpella)
o
0.5ꢀ V
Accuracy Over Line, Load, and
OUT
Temperature
o 7-Bit 0 to 1.50V VID Control
o Dynamic Phase Selection Optimizes Active/Sleep
Efficiency
o Transient Phase Overlap Reduces Output
Capacitance
o Integrated Boost Switches
o Active Voltage Positioning with Adjustable Gain
A slew-rate controller allows controlled transitions between
VID codes, controlled soft-start and shutdown, and con-
trolled exit from suspend. A thermistor-based temperature
sensor provides a programmable thermal-fault output
(VRHOT). A current monitor output (IMON) provides an
analog current output proportional to the power consumed
by the CPU (MAX17082/MAX17482 only). Output under-
voltage, overvoltage (MAX17021/MAX17082 only), and
thermal protection shut the controller down when any of
these faults are detected. A voltage-regulator power-OK
(PWRGD) output indicates the output is in regulation.
Additionally, the MAX17021/MAX17082/MAX17482 fea-
ture true differential current sense and a phase-good
(PHASEGD) output that indicates a phase imbalance
fault condition.
o Programmable 200kHz to 800kHz Switching
Frequency
o Accurate Current Balance and Current Limit
o Adjustable Slew-Rate Control
o Power-Good, Clock Enable, and Thermal-Fault
Outputs
o Phase Current Imbalance Fault Output
o Drives Large Synchronous Rectifier MOSFETs
o 4V to 26V Battery Input-Voltage Range
o Undervoltage and Thermal-Fault Protection
o Overvoltage Protection (MAX17021/MAX17082)
o Soft-Startup and Soft-Shutdown
The MAX17021 supports the IMVP-6+ specification
while the MAX17082/MAX17482 support the IMVP-6.5
requirements. The MAX17021/MAX17082/MAX17482
are available in a 5mm x 5mm, 40-pin TQFN package.
Pin Configuration
TOP VIEW
Applications
IMVP-6+/IMVP-6.5 Core Supply
Multiphase CPU Core Supply
Voltage-Positioned, Step-Down Converters
Notebook/Desktop Computers
Blade Servers
30 29 28 27 26 25 24 23 22 21
20 PHASEGD
31
32
33
34
35
36
37
38
DPRSTP (SLOW)
19
18
PWRGD
CLKEN
D0
D1
17 V3P3
D2
D3
16
15
14
13
12
11
TON
MAX17021
(MAX17082)
MAX17482
D4
D5
PSI
DPRSLPVR
SHDN
CSP2
Ordering Information
D6
*EP
8
39
40
+
CSP1
CSN1
PART
TEMP RANGE
-40°C to +105°C
-40°C to +105°C
-40°C to +105°C
PIN-PACKAGE
40 TQFN-EP*
40 TQFN-EP*
40 TQFN-EP*
CSN2
MAX17021GTL+
MAX17082GTL+
MAX17482GTL+
1
2
3
4
5
6
7
9
10
+Denotes a lead-free(Pb)/RoHS-compliant package.
*EP = Exposed pad.
THIN QFN
() DESIGNATES MAX17082/MAX17482 PIN NAME.
*EXPOSED PAD. CONNECTED TO GND.
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ 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.
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