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TPS54494RSAT Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce TPS54494RSAT
Description  4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET
Download  23 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54494RSAT Fiches technique(HTML) 1 Page - Texas Instruments

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V
= 1.5 V (50 mV/div)
O2
Iout (1 A/div)
t - Time - 100 s/div
m
Input Voltage
PGND
PGND
C4
SW1
VIN1
VBST1
EN1
VFB2
VFB1
GND
VREG5
PGND1
6
VIN2
VBST2
EN2
SW2
PG1
5
1
3
PG2
9
10
11
PGND2
2
4
7
13
12
TPS54494
HTSSOP16
14
8
15
16
PGND
SGND
SGND
C11
VO1
C21
R11
R21
L11
C31
C32
L12
C12
VO2
C22
R12
R22
(PowerPAD)
TPS54494
www.ti.com
SLVSBH1B – JUNE 2012 – REVISED AUGUST 2013
4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET
Check for Samples: TPS54494
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 : 0.76V to 7V
DESCRIPTION
Highly Efficient Integrated FETs Optimized for
The TPS54494 is a dual, adaptive on-time D-CAP2™
Low Duty Cycle Applications
mode synchronous buck converter. The TPS54494
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
4A CH1 / 2A CH2 Continuous Load Current
current solution. The main control loops of the
Low-Side rDS(on) Loss-Less Current Sensing
TPS54494 use the D-CAP2™ mode control which
Fixed Soft Start : 1 ms
provides a very fast transient response with no
Non-Sinking Pre-Biased Soft Start
external compensation components. The adaptive on-
time control supports seamless transition between
Powergood
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 TPS54494 to maintain high efficiency during
lighter load conditions. The TPS54494 is able to
OCL/UVLO/TSD Protections
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
voltages from 4.5V to 18V.
OCP Constant Due To Thermally Compensated
rDS(on) with 4000ppm/℃
The TPS54494 is available in a 4.4 mm × 5 mm 16-
pin TSSOP (PWP) and 4 mm x 4 mm 16-pin VQFN
16-Pin HTSSOP, 16-Pin VQFN
(RSA) package, and is specified for an ambient
Auto-Skip Eco-mode™
 
 for High Efficiency at
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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