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TPS54495RSAR Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza TPS54495RSAR
Descripción Electrónicos  4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET
Download  23 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54495RSAR Datasheet(HTML) 1 Page - Texas Instruments

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Input Voltage
PGND
PGND
C5
SW1
VIN1
VBST1
EN1
VFB2
VFB1
GND
VREG5
PGND1
6
VIN2
VBST2
EN2
SW2
SS1
5
1
3
SS2
9
10
11
PGND2
2
4
7
13
12
TPS54495
HTSSOP16
14
8
15
16
PGND
SGND
SGND
C11
VO1
C21
R11
R21
L11
C31
C32
L12
C12
VO2
C22
R12
R22
SGND
C41
C42
SGND
Vout2(50mV/div)
Iout2(1A/div)
100 s/div
m
TPS54495
www.ti.com
SLVSBH0A – JUNE 2012 – REVISED MAY 2013
4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET
Check for Samples: TPS54495
1
FEATURES
APPLICATIONS
2
D-CAP2™ Control Mode
Point-of-Load Regulation in Low Power
Systems for Wide Range of Applications
Fast Transient Response
Digital TV Power Supply
No External Parts Required For Loop
Compensation
Networking Home Terminal
Compatible with Ceramic Output
Digital Set Top Box (STB)
Capacitors
DVD Player/Recorder
Wide Input Voltage Range : 4.5 V to 18 V
Gaming Consoles and Other
Output Voltage Range : 0.76 V to 7 V
DESCRIPTION
Highly Efficient Integrated FETs Optimized for
The TPS54495 is a dual, adaptive on-time D-CAP2™
Low Duty Cycle Applications
mode synchronous buck converter. The TPS54495
90 m
Ω (High Side) and 60 mΩ (Low Side)
enables system designers to complete the suite of
High Initial Reference Accuracy
various end equipment’s power bus regulators with a
cost effective, low component count, and low standby
Supports Constant 4 A CH1 and 2 A CH2 Load
current solution. The main control loops of the
Current
TPS54495 use the D-CAP2™ mode control which
Low-Side rDS(on) Loss-Less Current Sensing
provides a very fast transient response with no
Adjustable Soft Start
external compensation components. The adaptive on-
time control supports seamless transition between
Non-Sinking Pre-Biased Soft Start
PWM mode at higher load conditions and Eco-
700 kHz Switching Frequency
mode™ operation at light loads. Eco-mode™ allows
Cycle-by-Cycle Over-Current Limit Control
the TPS54495 to maintain high efficiency during
OCL/UVLO/TSD Protections
lighter load conditions. The TPS54495 is able to
adapt to both low equivalent series resistance (ESR)
Hiccup Timer for Overload Protection
output capacitors such as POSCAP or SP-CAP, and
Adaptive Gate Drivers with Integrated Boost
ultra-low
ESR,
ceramic
capacitors.
The
device
PMOS Switch
provides convenient and efficient operation with input
OCP Constant Due To Thermally Compensated
voltages from 4.5V to 18V.
rDS(on) with 4000ppm/℃
The TPS54495 is available in a 4.4 mm × 5 mm 16-
16-Pin HTSSOP, 16-Pin VQFN
pin TSSOP (PWP) package and 4 mm x 4 mm 16-pin
VQFN (RSA), and is designed to operate for an
Auto-Skip Eco-mode™
 
 for High Efficiency at
ambient temperature range from –40°C to 85°C.
Light Load
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.
2
D-CAP2, Eco-mode, Eco-Mode are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2012–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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