CSD95379Q3M_15 Datasheet, PDF (1/22 Pages) Texas Instruments – CSD95379Q3M Synchronous Buck NexFET Power Stage

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CSD95379Q3M
SLPS446C – APRIL 2014 – REVISED NOVEMBER 2014
CSD95379Q3M Synchronous Buck NexFET™ Power Stage
1 Features
•1 92.5% System Efficiency at 12 A
• Ultra-Low Power Loss of 1.8 W at 12 A
• Max Rated Continuous Current of 20 A and Peak
Current of 45 A
• High Frequency Operation (up to 2 MHz)
• High Density – SON 3.3 mm × 3.3 mm Footprint
• Ultra-Low Inductance Package
• System Optimized PCB Footprint
• Low Quiescent (LQ) and Ultra-Low Quiescent
(ULQ) Current Mode
• 3.3 V and 5 V PWM Signal Compatible
• Diode Emulation Mode with FCCM
• Tri-State PWM Input
• Integrated Bootstrap Diode
• Shoot Through Protection
• RoHS Compliant – Lead-Free Terminal Plating
• Halogen Free
2 Applications
• NVDC Notebook / Ultrabook PCs
• Tablets
• Point of Load Synchronous Buck in Networking,
Telecom, and Computing Systems
3 Description
The CSD95379Q3M NexFET™ Power Stage is a
highly optimized design for use in 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. In addition, the driver IC supports
ULQ mode that enables Connected Standby for
Windows^® 8. With the PWM input in tri-state,
quiescent current is reduced to 130 µA, with
immediate response. When SKIP# is held at tri-state,
the current is reduced to 8 µA (typically 20 µs is
required to resume switching). This combination
produces high current, high efficiency, and high
speed switching capability in a small 3.3 mm × 3.3
mm outline package. In addition, the PCB footprint
has been optimized to help reduce design time and
simplify the completion of the overall system design.
SPACER
Application Diagram
CSD95379Q3M
Device
CSD95379Q3M
CSD95379Q3MT
Device Information⁽¹⁾
Media
Qty
Package
13-Inch Reel 2500 _{SON 3.3 × 3.3 mm}
7-Inch Reel 250 ^{Plastic Package}
Ship
Tape and
Reel
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Power Stage Efficiency and Power Loss
V_IN
100
6
90
5
V_CC
V_OUT
VCC
PWM1
+Is1
VOUT
-Is2
+NTC
SS
-NTC
RT
+Is2
-Is2
PWM2
PGND
80
4
V_DD = 5V
70
V_IN = 12V
V_OUT = 1.8V
3
L_OUT = .29µH
60
f_SW = 500kHz
2
T_A = 25ºC
50
1
40
0
0 2 4 6 8 10 12 14 16 18 20
Output Current (A)
G001
Multiphase
Controller
CSD95379Q3M
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.