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MAX17024

Single Quick-PWM Step-Down Controller with Dynamic REFIN

High Efficiency, Excellent Transient Response, and High DC-Output Accuracy Needed for Stepping Down High Voltages

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Overview

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 V_IN.

Maxim's proprietary Quick-PWM™ quick-response, constant-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 switching frequency. Strong drivers allow the MAX17024 to efficiently drive large synchronous-rectifier MOSFETs.

The controller senses the current across the sense resistor 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 controller 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.

MAX17024: Functional Block Diagram

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Key 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 V_IN Range)
- Feedback Input Regulates to 0 to 2V REFIN Voltage
- 0.5% V_OUT 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

Applications/Uses

DDR Memory-VDDQ or VTT
GPU Core Supply
I/O and Chipset Supplies
Notebook Computers
Point-of-Load Applications
Step-Down Power Supply

Parametric Specs

Part Number

V_IN
(V)

V_OUT1
(V)

Output Adjust. Method

I_OUT1
(A)

Switch Type

Synchronous Switching

Power Good Signal

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Budgetary
Price

min

max

min

max

See Notes

MAX17024

Dyn. REF In

Resistor

External

Yes

600

TDFN/14

$1.45 @1k

See All Step-Down Switching Regulators (380)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

MAX17024EVKIT: Evaluation Kit for the MAX17024

Quality and Environmental Data

Product Reliability Reports: MAX17024.pdf
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

MAX17024ETD+

MAX17024ETD+T

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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