MAX17024
EVALUATION KIT AVAILABLE
Single Quick-PWM Step-Down
Controller with Dynamic REFIN
General Description
The MAX17024 pulse-width modulation (PWM) controller
provides high efficiency, excellent transient response, and
high DC-output accuracy needed for stepping down high-
voltage batteries to generate low-voltage core or chipset/
RAM bias supplies in notebook computers. The output
voltage can be controlled using the dynamic REFIN,
which supports input voltages between 0 to 2V. The
REFIN adjustability combined with a resistive voltage-
divider on the feedback input allows the MAX17024 to be
configured for any output voltage between 0 to 0.9 x VIN.
Maxim’s proprietary Quick-PWM™ quick-response, con-
stant-on-time PWM control scheme handles wide input/
output voltage ratios (low-duty-cycle applications) with
ease and provides 100ns “instant-on” response to load
transients while maintaining a relatively constant switch-
ing frequency. Strong drivers allow the MAX17024 to effi-
ciently drive large synchronous-rectifier MOSFETs.
The controller senses the current across the sense resis-
tor series with the synchronous rectifier to achieve highly
accurate valley current-limit protection.
The MAX17024 includes a voltage-controlled soft-start
and soft-shutdown to limit the input surge current, provide
a monotonic power-up (even into a precharged output),
and provide a predictable power-up time. The control-
ler also includes output undervoltage and thermal-fault
protection.
The MAX17024 is available in a tiny 14-pin, 3mm x 3mm
TDFN package. For space-constrained applications, refer
to the MAX17016 single step-down with 26V internal
MOSFETs capable of supporting 10A continuous load.
The MAX17016 is available in a small 40-pin, 6mm x 6mm
TQFN package.
Applications
●● Notebook Computers
●● I/O and Chipset Supplies
●● GPU Core Supply
●● DDR Memory—VDDQ or VTT
●● Point-of-Load Applications
●● Step-Down Power Supply
Features
●● Quick-PWM with Fast Transient Response
●● Supports Any Output Capacitor
• No Compensation Required with Polymers/
Tantalum
• Stable with Ceramic Output Capacitors Using
External Compensation
●● Precision 2V ±10mV Reference
●● Dynamically Adjustable Output Voltage
(0 to 0.9 x VIN Range)
• Feedback Input Regulates to 0 to 2V REFIN Voltage
• 0.5% VOUT Accuracy Over Line and Load
●● 26V Maximum Input Voltage Rating
●● Resistively Programmable Switching Frequency
●● Undervoltage/Thermal Protection
●● Voltage Soft-Start and Soft-Shutdown
●● Monotonic Power-Up with Precharged Output
●● Power-Good Window Comparator
Ordering Information appears at end of data sheet.
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Pin Configuration
TOP VIEW
14 13 12 11 10 9 8
MAX17024
GND
1234567
TDFN
(3mm x 3mm)
19-1040; Rev 3; 3/18
