MAX17409 Datasheet, PDF (1/32 Pages) Maxim Integrated Products – 1-Phase Quick-PWM GPU Controller

19-4590; Rev 1; 7/09
EVAALVUAAILTAIOBNLEKIT
1-Phase Quick-PWM GPU Controller
General Description
The MAX17409 is a 1-phase Quick-PWM™ step-down
VID power-supply controller for high-performance graph-
ics processors. The Quick-PWM control provides instan-
taneous response to fast-load current steps. Active
voltage positioning reduces power dissipation and bulk
output capacitance requirements and allows ideal posi-
tioning compensation for tantalum, polymer, or ceramic
bulk output capacitors.
The MAX17409 is intended for two different notebook
processor 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 this device to directly step down high-volt-
age 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.
The MAX17409 is available in a 28-pin, 4mm x 4mm
TQFN package.
Applications
Graphics Core (GPU) Power Supplies
Voltage-Positioned Step-Down Converters
2-to-4 Li+ Cells Battery to Processor Core
Supply Converters
Notebooks/Desktops/Servers
Features
o 1-Phase Quick-PWM Controller
o ±6mV V_OUT Accuracy Over Line, Load, and
Temperature
o 6-Bit Graphics DAC (12.5mV LSB)
o Active Voltage Positioning with Adjustable Gain
o Accurate Droop and Current Limit
o Remote Output and Ground Sense
o Buffered 2V Reference Output for Offsets
o Power-Good Window Comparator
o Temperature Comparator
o Drives Large Synchronous Rectifier FETs
o 2V to 26V Power Input Range
o Adjustable Switching Frequency (600kHz max)
o Output Overvoltage and Undervoltage Protection
o Soft-Startup and Soft-Shutdown
o Internal Boost Diodes
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX17409GTI+
-40°C to +105°C
28 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration
TOP VIEW
21 20 19 18 17 16 15
DH 22
GND 23
VRHOT 24
REF 25
ILIM 26
V_CC 27
CCV 28
MAX17409
PAD
GND
14 G3
13 G2
12 G1
11 G0
10 SHDN
9 PWRGD
8 TON
1 234567
THIN QFN
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.