CSD95373AQ5M Datasheet, PDF (1/25 Pages) Texas Instruments – Synchronous Buck NexFET Power Stage

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Synchronous Buck NexFET™ Power Stage
CSD95373AQ5M
SLPS458 – DECEMBER 2013
FEATURES
1
•23 45 A Continuous Operating Current Capability
• 92.6% System Efficiency at 25 A
• Ultra-Low Power Loss of 2.6 W at 25 A
• High Frequency Operation (up to 2 MHz)
• High Density – SON 5 x 6-mm Footprint
• Ultra-Low Inductance Package
• System Optimized PCB Footprint
• 3.3 V and 5 V PWM Signal Compatible
• Diode Emulation Mode with FCCM
• Analog Temperature Output
• Input Voltages up to 14.5 V
• Three-State PWM Input
• Integrated Bootstrap Switch
• Optimized Dead Time for Shoot Through
Protection
• RoHS Compliant – Lead-Free Terminal Plating
• Halogen Free
APPLICATIONS
• Multiphase Synchronous Buck Converter
– High Frequency Applications
– High Current, Low Duty Cycle Applications
• Point-of-Load DC-DC Converters
• Memory and Graphic Cards
• Desktop and Server VR11.x and VR12.x for
VCore Synchronous Buck Converters
ORDERING INFORMATION
Device
Package
Media Qty
CSD95373AQ5M
SON 5 × 6-mm
Plastic Package
13-Inch
Reel
2500
Ship
Tape and
Reel
DESCRIPTION
The CSD95373AQ5M NexFET™ Power Stage is a highly optimized design for use in a high-power, high-density
synchronous buck converters. This product integrates the driver IC and NexFET technology to complete the
power stage switching function. The driver IC has a built-in selectable diode emulation function that enables
DCM operation to improve light load efficiency. This combination produces high current, high efficiency, and high
speed switching capability in a small 5 x 6 mm outline package. It also integrates the temperature sensing
functionality to simplify system design and improve accuracy. In addition, the PCB footprint has been optimized
to help reduce design time and simplify the completion of the overall system design.
CSD95373A
V_CC
V_OUT
VCC
PWM1
+Is1
VOUT
-Is2
+NTC
SS
-NTC
RT
+Is2
-Is2
PWM2
PGND
V_IN
V_OUT
100
10
90
9
80
8
70
7
60
V_DD = 5V
6
50
V_IN = 12V
5
V_OUT = 1.2V
40
L_OUT = .22µH
4
30
f_SW = 500kHz
3
T_A = 25ºC
20
2
10
1
0
0
0 5 10 15 20 25 30 35 40 45
Output Current (A)
G001
TPS53640
Controller
CSD95373A
Figure 1. Application Diagram
Figure 2. Efficiency and Power Loss
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.
NexFET is a trademark of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
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