MAX17021 Datasheet, PDF (1/48 Pages) Maxim Integrated Products – Dual-Phase, Quick-PWM Controllers for IMVP-6+/IMVP-6.5 CPU Core Power Supplies

19-4372; Rev 2; 7/09
EVAALVUAAILTAIOBNLEKIT
Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
General Description
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.
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.
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.
Applications
IMVP-6+/IMVP-6.5 Core Supply
Multiphase CPU Core Supply
Voltage-Positioned, Step-Down Converters
Notebook/Desktop Computers
Blade Servers
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX17021GTL+
-40°C to +105°C 40 TQFN-EP*
MAX17082GTL+
-40°C to +105°C 40 TQFN-EP*
MAX17482GTL+
-40°C to +105°C 40 TQFN-EP*
+Denotes a lead-free(Pb)/RoHS-compliant package.
*EP = Exposed pad.
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Features
o Single-/Dual-Phase, Quick-PWM Controllers
o MAX17021 IMVP-6+ (Montevina)
o MAX17082/MAX17482 IMVP-6.5 (Calpella)
o ±0.5% V_OUT Accuracy Over Line, Load, and
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
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
Pin Configuration
TOP VIEW
30 29 28 27 26 25 24 23 22 21
DPRSTP (SLOW) 31
20 PHASEGD
D0 32
19 PWRGD
D1 33
18 CLKEN
D2 34
17 V3P3
D3 35
D4 36
D5 37
MAX17021
(MAX17082)
MAX17482
16 TON
15 PSI
14 DPRSLPVR
D6 38
CSP1 39
*EP
13 SHDN
12 CSP2
CSN1 40
11 CSN2
+ _{1 2 3 4 5 6 7 8 9 10}
THIN QFN
() DESIGNATES MAX17082/MAX17482 PIN NAME.
*EXPOSED PAD. CONNECTED TO GND.
________________________________________________________________ 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.