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MAX8791B

Maxim Integrated Products
Part Number MAX8791B
Manufacturer Maxim Integrated Products
Description Single-Phase Synchronous MOSFET Driver
Published Aug 22, 2014
Detailed Description 19-0628; Rev 2; 1/10 Single-Phase, Synchronous MOSFET Drivers General Description The MAX8791/MAX8791B are single-phase...
Datasheet PDF File MAX8791B PDF File

MAX8791B
MAX8791B

Overview
19-0628; Rev 2; 1/10 Single-Phase, Synchronous MOSFET Drivers General Description The MAX8791/MAX8791B are single-phase, synchronous, noninverting MOSFET drivers.
The MAX8791/ MAX8791B are intended to work with controller ICs like the MAX8736 or MAX8786, 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 conversion method allows the highest possible efficiency, while the 2-stage conversion at higher switching frequency provides the minimum possible physical size.
The low-side drivers are 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 currents and maximizes converter efficiency.
The MAX8791/MAX8791B are available in a small, leadfree, 8-pin, 3mm x 3mm TQFN package.
Features o Single-Phase, Synchronous MOSFET Drivers o 0.
5Ω Low-Side On-Resistance o 0.
7Ω High-Side On-Resistance o 8ns Propagation Delay o 15ns Minimum Guaranteed Dead Time o Integrated Boost “Diode” o 2V to 24V Input Voltage Range o Selectable Pulse-Skipping Mode o Low-Profile TQFN Package MAX8791/MAX8791B Applications Notebooks/Desktops/Servers CPU Core Power Supplies Multiphase Step-Down Converters PART MAX8791GTA+ MAX8791BGTA+ Ordering Information TEMP RANGE -40oC to +105oC -40oC to +105oC PIN-PACKAGE 8 TQFN-EP* 8 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Typical Operating Circuit INPUT (VIN)* 5V TO 24V Pin Configuration SKIP 6 LX 7 PWM DH TOP VIEW MAX8791 MAX8791B PWM SKIP +5V BIAS SUPPLY SKIP BST LX VDD DL VOUT (1.
45V AT 20A) VDD 5 4 DL DH 8 + MAX8791 MAX8791B 1 BST 2 PWM 3 GND GND PAD TQFN 3mm × 3mm ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact...


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