MAX17491 Maxim Integrated Products, MAX17491 Datasheet

MAX17491

Manufacturer Part Number

MAX17491

Description

Single-Phase Synchronous MOSFET Driver

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX17491.pdf (12 pages)

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Download datasheet (342Kb)

The MAX17491 is a single-phase synchronous nonin-

verting MOSFET driver. The MAX17491 is intended to

work with controller ICs like the MAX8736, MAX8786, or

MAX17030 in multiphase notebook CPU core regulators.

The regulators can either step down directly from the

battery voltage to create the core voltage or step down

from the main system supply. The single-stage conver-

sion method allows the highest possible efficiency, while

the 2-stage conversion at higher switching frequency

provides the minimum possible physical size.

The low-side driver is optimized to drive 3nF capacitive

loads with 4ns/8ns typical fall/rise times, and the high-

side driver with 8ns/10ns typical fall/rise times.

Adaptive dead-time control prevents shoot-through cur-

rents and maximizes converter efficiency.

The MAX17491 features improved zero crossing and

UVLO performance over the MAX8791/MAX8791B.

The MAX17491 is available in a small, lead-free, 8-pin,

3mm x 3mm TQFN package.

19-5324; Rev 0; 6/10

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.

TOP VIEW

Notebooks/Desktops/Servers

CPU Core Power Supplies

Multiphase Step-Down Converters

Single-Phase Synchronous MOSFET Driver

________________________________________________________________ Maxim Integrated Products

General Description

MAX17491

TQFN

Pin Configuration

Applications

GND

♦ Single-Phase Synchronous MOSFET Driver

♦ 0.5Ω Low-Side On-Resistance

♦ 0.7Ω High-Side On-Resistance

♦ 10ns Minimum Guaranteed Dead Time

♦ Integrated Boost “Diode”

♦ 2V to 24V Input Voltage Range

♦ Selectable Pulse-Skipping Mode

♦ Low-Profile, 3mm x 3mm, TQFN Package

+ Denotes a lead(Pb)-free/RoHS-compliant package.

* EP = Exposed pad.

MAX17491GTA+

+5V BIAS

SUPPLY

PWM

PART

SKIP

PWM

Typical Operating Circuit

MAX17491

-40°C to +105°C

PAD

TEMP RANGE

Ordering Information

GND

BST

www.DataSheet4U.com

PIN-PACKAGE

Features

8 TQFN-EP*

INPUT (V

5V TO 24V

OUT

AT 20A)

(1.45V

)

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