CSD97394Q4M_15 Datasheet, PDF (1/22 Pages) Texas Instruments – CSD97394Q4M Synchronous Buck NexFET Power Stage

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CSD97394Q4M
SLPS542 – JANUARY 2015
CSD97394Q4M Synchronous Buck NexFET™ Power Stage
1 Features
•1 90% System Efficiency at 15 A
• Max Rated Continuous Current 20 A, Peak 45 A
• High Frequency Operation (up to 2 MHz)
• High Density – SON 3.5 × 4.5 mm Footprint
• Ultra-Low Inductance Package
• System Optimized PCB Footprint
• Ultra-Low Quiescent (ULQ) Current Mode
• 3.3 V and 5 V PWM Signal Compatible
• Diode Emulation Mode with FCCM
• Input Voltages up to 24 V
• Tri-State PWM Input
• Integrated Bootsrap Diode
• Shoot Through Protection
• RoHS Compliant – Lead Free Terminal Plating
• Halogen Free
2 Applications
• Ultrabook/Notebook DC/DC Converters
• Multiphase Vcore and DDR Solutions
• Point-of-Load Synchronous Buck in Networking,
Telecom, and Computing Systems
3 Description
The CSD97394Q4M NexFET™ Power Stage is a
highly-optimized design for use in a high-power, high-
density synchronous buck converter. 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 a high current, high efficiency, and high
speed switching device in a small 3.5 × 4.5 mm
outline package. In addition, the PCB footprint is
optimized to help reduce design time and simplify the
completion of the overall system design.
Application Diagram
Device Information⁽¹⁾
ORDER NUMBER
PACKAGE
MEDIA AND QTY
CSD97394Q4M
CSD97394Q4MT
SON 3.5 × 4.5 mm
Plastic Package
13-inch reel 2500
7-inch reel 250
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
spacer
Typical Power Stage Efficiency and Power Loss
V_IN
100
12
CSD97394
V_CC
V_OUT
VCC
PWM1
+Is1
VOUT
-Is2
+NTC
SS
-NTC
RT
+Is2
-Is2
PWM2
PGND
Multi-Phase
Controller
CSD97394
90
10
V_OUT
80
V_DD = 5 V
8
V_IN = 12 V
V_OUT = 1.8 V
70
L_OUT = 0.29 2H
6
f_SW = 500 kHz
60
T_A = 25GC
4
50
2
40
0
0
4
8
12
16
20
Output Current (A)
D001
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.