# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Fairchild FDMF6706C Specifications Manual

Summary

This ultra-compact 6x6mm DrMOS module is a high-performance, integrated power stage designed for efficient synchronous buck DC-DC conversion. The manual provides detailed specifications for its integrated MOSFETs, driver IC, and bootstrap diode, highlighting features like >93% peak efficiency and operation up to 1MHz. It is the ideal solution for engineers designing compact systems including blade servers, gaming motherboards, professional workstations, and high-current point-of-load regulators where superior thermal performance is required.

📄 Preview PAGE OF 18

Page 1 Text Content

6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le

March 2012

FDMF6706C – Extra-Small, High-Performance, High- Frequency Dr MOS Module

Benefits Description The XS™ Dr MOS family is Fairchild’s next-generation,

 Ultra-Compact 6x6mm PQFN, 72% Space-Saving

fully optimized, ultra-compact, integrated MOSFET plus

Compared to Conventional Discrete Solutions

driver power stage solutions for high-current, high-

 Fully Optimized System Efficiency frequency, synchronous buck DC-DC applications. The

 Clean Switching Waveforms with Minimal Ringing FDMF6706C integrates a driver IC, two power MOSFETs, and a bootstrap Schottky diode into a

 High-Current Handling

thermally enhanced, ultra-compact 6x6mm PQFN package.

Features

With an integrated approach, the complete switching

 Over 93% Peak-Efficiency power stage is optimized with regards to driver and

 High-Current Handling of 43A MOSFET dynamic performance, system inductance, and Power MOSFET RDS(ON). XS™ Dr MOS uses

 High-Performance PQFN Copper Clip Package

Fairchild's high-performance Power Trench® MOSFET  3-State 5V PWM Input Driver technology, which dramatically reduces switch ringing, eliminating the need for a snubber circuit in most buck

 Shorter Propagation Delays than FDMF6704

converter applications.

 Shorter Dead Times than FDMF6704

A new driver IC with reduced dead times and

 Skip-Mode SMOD# (Low-Side Gate Turn Off) Input

propagation delays further enhances the performance of  Thermal Warning Flag for Over-Temperature this part. A thermal warning function has been included Condition to warn of a potential over-temperature situation. The FDMF6706C also incorporates features, such as Skip

 Driver Output Disable Function (DISB# Pin)

Mode (SMOD), for improved light-load efficiency along  Internal Pull-Up and Pull-Down for SMOD# and with a 3-state 5V PWM input for compatibility with a DISB# Inputs, Respectively wide range of PWM controllers.

 Fairchild Power Trench® Technology MOSFETs for

Applications

Clean Voltage Waveforms and Reduced Ringing

 Fairchild Sync FET™ (Integrated Schottky Diode)  High-Performance Gaming Motherboards

Technology in the Low-Side MOSFET  Compact Blade Servers, V-Core and Non-V-Core

 Integrated Bootstrap Schottky Diode DC-DC Converters  Adaptive Gate Drive Timing for Shoot-through  Desktop Computers, V-Core and Non-V-Core Protection DC-DC Converters  Under-Voltage Lockout (UVLO)  Workstations  Optimized for Switching Frequencies up to 1MHz  High-Current DC-DC Point-of-Load (POL) Converters

 Low-Profile SMD Package

 Networking and Telecom Microprocessor Voltage

 Fairchild Green Packaging and Ro HS Compliant

Regulators

 Based on the Intel® 4.0 Dr MOS Standard

 Small Form-Factor Voltage Regulator Modules

Ordering Information Part Current Input Switching

Package Top Mark

Number Rating Voltage Frequency

40-Lead, Clipbond PQFN Dr MOS,

FDMF6706C 40A 12V 1000k Hz FDMF6706C

6.0x6.0mm Package

© 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FDMF6706C • Rev. 1.0 2

Page Summary Contents For Fairchild FDMF6706C Specifications Manual

Page 1 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le March 2012 FDMF6706C – Extra-Small, High-Performance, High- Frequency Dr MOS Module Benefits Description The XS™ Dr MOS family is ...
Page 2 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Typical Application Circuit CVDRV CVIN VDRV VCIN VIN DISB# DISB# RBOOT CBOOT PWM Input PWM FDMF6706C PHASE SMOD# VSWH VOUT Open Dr...
Page 3 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Pin Configuration Figure 3. Bottom View Figure 4. Top View Pin Definitions Pin # Name Description When SMOD#=HIGH, the low-side dr...
Page 4 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be ...
Page 5 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Electrical Characteristics Typical values are VIN = 12V, VCIN = 5V, VDRV = 5V, and TA = +25°C unless otherwise noted. Symbol Param...
Page 6 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Electrical Characteristics Typical values are VIN = 12V, VCIN = 5V, VDRV = 5V, and TA = +25°C unless otherwise noted. Symbol Param...
Page 7 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le V IH_PWM IL_PWM GH to VSWH t D_TIMEOUT ( 250ns Timeout) t PD t PD PLGHL PHGLL t D_DEADOFF t D_DEADON Figure 5. PWM Timing Diagram ...
Page 8 6706C - E xtra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Typical Performance Characteristics Test Conditions: VIN=12V, VOUT=1.0V, VCIN=5V, VDRV=5V, LOUT=320n H, TA=25°C, and natural conv...
Page 9 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Typical Performance Characteristics (Continued) Test Conditions: VIN=12V, VOUT=1.0V, VCIN=5V, VDRV=5V, LOUT=320n H, TA=25°C, and n...
Page 10 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Typical Performance Characteristics (Continued) Test Conditions: VIN=12V, VOUT=1.0V, VCIN=5V, VDRV=5V, LOUT=320n H, TA=25°C, and n...
Page 11 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Functional Description The FDMF6706C is a driver-plus-FET module optimized 3-State PWM Input for the synchronous buck converter to...
Page 12 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le To preclude overlap during the HIGH-to-LOW transition Adaptive Gate Drive Circuit (Q1 off to Q2 on), the adaptive circuitry monito...
Page 13 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Skip Mode (SMOD) The SMOD function allows for higher converter Table 2. SMOD Logic efficiency under light-load conditions. During ...
Page 14 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Application Information noise immunity, an RC filter can be inserted between Supply Capacitor Selection VDRV and VCIN. Recommended...
Page 15 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le PCB Layout Guidelines Figure 24 provides an example of a proper layout for the 7. The layout should include the option to insert a...
Page 16 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Bottom View Top View Figure 24. PCB Layout Example © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FDMF6706C • Re...
Page 17 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le Physical Dimensions PIN#1 0.10 INDICATOR TOP VIEW 0.60 SEE 0.35 DETAIL 'A' 0.50 TYP 2.10 2.10 LAND PATTERN RECOMMENDATION FRONT VI...
Page 18 6706C - E tra-S all H ig -P erfo rm an ce, H ig -F req en cy D r M le © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FDMF6706C • Rev. 1.0.2 18

Manual Details

Brand Fairchild
Pages 18
File Size 1.77 MB
Published June 06, 2026
44 views

Enter the captcha to get the download link:

captcha

Frequently Asked Questions

What is the max current handling capability of this DrMOS module?

The FDMF6706C supports a high-current handling capacity of 43A.

Where should I place capacitors for optimal performance?

For VCIN and VDRV, minimum 1µF ceramic capacitors are recommended to be connected as close as possible from these pins to CGND.

What is the purpose of the SMOD# pin?

SMOD# facilitates Skip-Mode operation (SMOD), which improves light-load efficiency.

Can Pin #6 (GH) be connected during a circuit build?

No, pin 6 (GH) is solely for manufacturing test and must float; it cannot be connected to any other pin.