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TPS54294 Datasheet Preview

TPS54294 Datasheet

2A Dual Channel Synchronous Step-Down Switcher

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TPS54294
www.ti.com
SLVSB00D – OCTOBER 2011 – REVISED SEPTEMBER 2013
2A Dual Channel Synchronous Step-Down Switcher with Integrated FET
Check for Samples: TPS54294
FEATURES
1
2 D-CAP2™ Control Mode
– Fast Transient Response
– No External Parts Required For Loop
Compensation
– Compatible with Ceramic Output
Capacitors
• Wide Input Voltage Range : 4.5 V to 18 V
• Output Voltage Range : 0.76V to 7.0V
• Highly Efficient Integrated FETs Optimized for
Low Duty Cycle Applications
– 150 m(High Side) and 100 m(Low Side)
• High Initial Reference Accuracy
• Low-Side rDS(on) Loss-Less Current Sensing
• Fixed Soft Start : 1.0ms
• Non-Sinking Pre-Biased Soft Start
• Powergood
• 700 kHz Switching Frequency
• Cycle-by-Cycle Over-Current Limit Control
• OCL/OVP/UVP/UVLO/TSD Protections
• Adaptive Gate Drivers with Integrated Boost
PMOS Switch
• OCP Constant Due To Thermally Compensated
rDS(on) with 4000ppm/
• 16-Pin HTSSOP, 16-Pin VQFN
• Auto-Skip Eco-mode™ for High Efficiency at
Light Load
APPLICATIONS
• Point-of-Load Regulation in Low Power
Systems for Wide Range of Applications
– Digital TV Power Supply
– Networking Home Terminal
– Digital Set Top Box (STB)
– DVD Player/Recorder
– Gaming Consoles and Other
DESCRIPTION
The TPS54294 is a dual, adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54294
enables system designers to complete the suite of
various end equipment’s power bus regulators with a
cost effective, low component count, and low standby
current solution. The main control loops of the
TPS54294 use the D-CAP2™ mode control which
provides a very fast transient response with no
external compensation components. The adaptive on-
time control supports seamless transition between
PWM mode at higher load conditions and Eco-
mode™ operation at light loads. Eco-mode™ allows
the TPS54294 to maintain high efficiency during
lighter load conditions. The TPS54294 is able to
adapt to both low equivalent series resistance (ESR)
output capacitors such as POSCAP or SP-CAP, and
ultra-low ESR, ceramic capacitors. The device
provides convenient and efficient operation with input
voltages from 4.5V to 18V.
The TPS54294 is available in a 4.4mm × 5.0mm 16-
pin TSSOP (PWP) package, and 4mm x 4mm 16-pin
VQFN (RSA) package specified for an ambient
temperature range from –40°C to 85°C.
Input Voltage
VO1
C11
L11
C21
PGND
R11
R21
SGND
1 VIN1
VIN2 16
2 VBST1
C31
3 SW1
VBST2 15
C32
SW2 14
4 PGND1
5 EN1
TPS54294
HTSSOP16
PGND2 13
EN2 12
C12
L12
VO2
C22
PGND
6 PG1
7 VFB1
8 GND
(PowerPAD)
PG2 11
VFB2 10
C4
VREG5 9
PGND
R12
R22
SGND
VO2 = 1.5 V (50 mV/div)
Iout (1 A/div)
t - Time - 100 ms/div
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.
D-CAP2, Eco-mode, Eco-Mode, SWIFT are trademarks of Texas Instruments.
2
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 © 2011–2013, Texas Instruments Incorporated




etcTI

TPS54294 Datasheet Preview

TPS54294 Datasheet

2A Dual Channel Synchronous Step-Down Switcher

No Preview Available !

TPS54294
SLVSB00D – OCTOBER 2011 – REVISED SEPTEMBER 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
TA
–40to 85
PACKAGE
PWP
RSA
ORDERING INFORMATION(1)
ORDERING PART NUMBER
TPS54294PWPR
TPS54294PWP
TPS54294RSAR
TPS54294RSAT
PINS
16
16
OUTPUT SUPPLY
Tape-and-Reel
Tube
Tape-and-Reel
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)(1) (2)
VALUE
UNIT
VIN1, VIN2, EN1, EN2
–0.3 to 20
VBST1, VBST2
–0.3 to 26
VBST1, VBST2 (10ns transient)
–0.3 to 28
Input voltage range
VBST1–SW1 , VBST2–SW2
–0.3 to 6.5
V
VFB1, VFB2
–0.3 to 6.5
SW1, SW2
–2 to 20
SW1, SW2 (10ns transient)
–3 to 22
Output voltage range
VREG5, PG1, PG2
PGND1, PGND2
–0.3 to 6.5
V
–0.3 to 0.3
Electrostatic discharge
Human Body Model (HBM)
Charged Device Model (CDM)
2
kV
500
V
TA
TSTG
TJ
Operating ambient temperature range
Storage temperature range
Junction temperature range
–40 to 85
°C
–55 to 150
°C
–40 to 150
°C
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" are not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to IC GND terminal.
THERMAL INFORMATION
THERMAL METRIC(1)
TPS54294
PWP (16) PINS
RSA (16) PINS
UNITS
θJA
θJCtop
θJB
ψJT
ψJB
θJCbot
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
47.5
34.9
27.1
40.0
20.8
11.8
°C/W
1.0
0.7
20.6
11.8
2.7
3.3
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
2
Submit Documentation Feedback
Product Folder Links: TPS54294
Copyright © 2011–2013, Texas Instruments Incorporated


Part Number TPS54294
Description 2A Dual Channel Synchronous Step-Down Switcher
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