MAX17528 Datasheet, PDF (1/41 Pages) Maxim Integrated Products – 1-Phase Quick-PWM Intel IMVP-6.5/GMCH Controllers

19-4723; Rev 0; 7/09
EVAALVUAAILTAIOBNLEKIT
1-Phase Quick-PWM
Intel IMVP-6.5/GMCH Controllers
General Description
The MAX17528 comprises 1-phase Quick-PWM™ step-
down VID power-supply controllers for Intel notebook
CPUs. The Quick-PWM control provides instantaneous
response to fast-load current steps. Active voltage
positioning reduces power dissipation and bulk output
capacitance requirements and allows ideal positioning
compensation for tantalum, polymer, or ceramic bulk
output capacitors.
The MAX17528 is intended for two different notebook
CPU/GPU core applications: either bucking down the bat-
tery directly to create the core voltage, or bucking down
the +5V system supply. The single-stage conversion
method allows these devices 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 possible
physical size.
A slew-rate controller allows controlled transitions
between VID codes. A thermistor-based temperature
sensor provides programmable thermal protection. A
current monitor provides an analog output current pro-
portional to the processor load current.
The MAX17528 implements both the Intel IMVP-6.5
CPU core specifications (CLKEN pullup to 3.3V), as
well as the Intel GMCH graphics core specifications
(CLKEN = GND). The MAX17528 is available in a
32-pin, 5mm x 5mm TQFN package.
Applications
IMVP-6.5 Core Power Supply
Intel GMCH 2009
Intel Calpella Platforms
Graphics Core Power Supply
Voltage-Positioned Step-Down Converters
1-to-4 Lithium-Ion (Li+)-Cell Battery-to-CPU Core
Supply Converters
Notebooks/Desktops/Servers
Features
o 1-Phase Quick-PWM Controller
o ±0.5% V_OUT Accuracy Over Line, Load, and
Temperature
o 7-Bit IMVP-6.5 DAC
o IMVP-6.5 and GMCH Compliant
o Active Voltage Positioning with Adjustable Gain
o Accurate Droop and Current Limit
o Remote Output and Ground Sense
o Adjustable Output-Voltage Slew Rate
o Power-Good Window Comparator
o Current Monitor
o Temperature Comparator
o Drives Large Synchronous Rectifier FETs
o 2V to 26V Battery Input Range
o Adjustable Switching Frequency (600kHz max)
o Undervoltage and Thermal-Fault Protection
o Soft-Startup and Soft-Shutdown
o Internal Boost Diode
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX17528GTJ+
-40^oC to +105^oC
32 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration
TOP VIEW
24 23 22 21 20 19 18 17
LX 25
16 D2
DH 26
15 D1
PGDIN 27
14 D0
VRHOT 28
TIME 29
ILIM 30
V_CC 31
CCV 32
MAX17528
PAD
GND
13 GND
12 CLKEN
11 SHDN
10 PWRGD
9 TON
1 2345678
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
THIN QFN
5mm x 5mm
________________________________________________________________ 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.