UCD7242-EP_16 Datasheet, PDF (1/36 Pages) Texas Instruments – Digital Dual Synchronous-Buck Power Driver

UCD7242-EP
www.ti.com
SLVSBY2 – OCTOBER 2013
Digital Dual Synchronous-Buck Power Driver
Check for Samples: UCD7242-EP
FEATURES
1
• Fully Integrated Power Switches With Drivers
for Dual Synchronous Buck Converters
• Full Compatibility With TI Fusion Digital Power
Supply Controllers, Such as the UCD92xx
Family
• Wide Input Voltage Range: 4.75 V to 18 V
Operational Down to 2.2-V Input With an
External Bias Supply
• Up to 10-A Output Current per Channel
• Operational to 2-MHz Switching Frequency
• High Side Current Limit With Current Limit
Flag
• Onboard Regulated 6 V Driver Supply From V_IN
• Thermal Protection
• Temperature Sense Output – Voltage
Proportional to Chip Temperature
• UVLO and OVLO Circuits Ensure Proper Drive
Voltage
• RoHS Compliant
• Accurate On-Die Current Sensing (±5%)
APPLICATIONS
• Digitally-Controlled Synchronous-Buck Power
Stages
• High Current Dual-Phase VRM/EVRD
Regulators for Desktop, Server, Telecom and
Notebook Processors
SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
• Controlled Baseline
• One Assembly and Test Site
• One Fabrication Site
• Available in Military (–55°C to 125°C)
Temperature Range
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
T_MON
V_IN
PWM-B
SRE-B
FLT-B
V_GGDIS
I_MON-B
BST-B
PWM-A
SRE-A
FLT-A
I_MON-A
BST-A
BSW-B
SW-B
BSW-A
SW-A
PGND
PGND
GND BP3 _VGG
DESCRIPTION
The UCD7242 is a complete power system ready to drive two independent buck power supplies (see Figure 1).
High side MOSFETs, low side MOSFETs, drivers, current sensing circuitry and necessary protection functions
are all integrated into one monolithic solution to facilitate minimum size and maximum efficiency. Driver circuits
provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous
rectifier in a synchronous buck circuit. The MOSFET gates are driven to +6.25 V by an internally regulated V_GG
supply. The internal V_GG regulator can be disabled to permit the user to supply an independent gate drive
voltage. This flexibility allows a wide power conversion input voltage range of 2.2 V to 18 V. Internal under
voltage lockout (UVLO) logic ensures V_GG is good before allowing chip operation.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated