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TPS54810 Datasheet Preview

TPS54810 Datasheet

SYNCHRONOUS BUCK PWM SWITCHER

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www.ti.com
6,4 mm X 9,7 mm
TPS54810
SLVS420B MARCH 2002 R EVISED FEBRUARY 2005
4-V TO 6-V INPUT, 8-A OUTPUT SYNCHRONOUS BUCK PWM
SWITCHER WITH INTEGRATED FETS (SWIFT)
FEATURES
D 30-mMOSFET Switches for High Efficiency
at 8-A Continuous Output
D 0.9-V to 3.3-V Adjustable Output Voltage
Range With 1% Accuracy
D Externally Compensated
D Fast Transient Response
D Wide PWM Frequency:
Fixed 350 kHz, 550 kHz or
Adjustable 280 kHz to 700 kHz
D Load Protected by Peak Current Limit and
Thermal Shutdown
D Integrated Solution Reduces Board Area and
Total Cost
APPLICATIONS
D Low-Voltage, High-Density Systems With
Power Distributed at 5 V
D Point of Load Regulation for High
Performance DSPs, FPGAs, ASICs and
Microprocessors
D Broadband, Networking, and Optical
Communications Infrastructure
D Portable Computing/Notebook PCs
DESCRIPTION
As a member of the SWIFTfamily of dc/dc regulators,
the TPS54810 low-input voltage high-output current
synchronous buck PWM converter integrates all
required active components. Included on the substrate
with the listed features are a true, high performance,
voltage error amplifier that enables maximum
performance under transient conditions and flexibility in
choosing the output filter L and C components; an
under-voltage-lockout circuit to prevent start-up until
the input voltage reaches 3.8 V; an internally or
externally set slow-start circuit to limit in-rush currents;
and a power good output useful for processor/logic
reset, fault signaling, and supply sequencing.
The TPS54810 is available in a thermally enhanced
28-pin TSSOP (PWP) PowerPADpackage, which
eliminates bulky heatsinks. TI provides evaluation
modules and the SWIFTdesigner software tool to aid
in quickly achieving high-performance power supply
designs to meet aggressive equipment development
cycles.
Input
SIMPLIFIED SCHEMATIC
VIN PH
TPS54810
BOOT
PGND
VBIAS
VSCEONMSEP
AGND VSENSE
Output
Compensation Network
100
95
90
85
80
75
70
65
60
55
50
0
EFFICIENCY AT 700 HZ
VI = 5 V
VO = 3.3 V
1 234 5678 9
IL Load Current A
10
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.
PowerPAD and SWIFT are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright © 2002, Texas Instruments Incorporated




etcTI

TPS54810 Datasheet Preview

TPS54810 Datasheet

SYNCHRONOUS BUCK PWM SWITCHER

No Preview Available !

TPS54810
SLVS420B MARCH 2002 R EVISED FEBRUARY 2005
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.
ORDERING INFORMATION
TA
40°C to 85°C
OUTPUT VOLTAGE
0.9 V to 3.3 V
PACKAGE
PLASTIC HTSSOP (PWP)(1)
PART NUMBER
TPS54810PWP
(1) The PWP package is also available taped and reeled. Add an R suffix to the device type (i.e., TPS54810PWPR). See the application section
of the data sheet for PowerPADdrawing and layout information.
(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website
at www.ti.com.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
TPS54810
UNIT
VIN, SS/ENA, SYNC
0.3 to 7
Input voltage range, VI
RT
VSENSE
0.3 to 6
0.3 to 4
V
BOOT
0.3 to 17
Output voltage range, VO
VBIAS, COMP, PWRGD
PH
0.3 to 7
0.6 to 10
V
Source current, IO
PH
COMP, VBIAS
Internally Limited
6 mA
PH 12 A
Sink current, IS
COMP
SS/ENA, PWRGD
6
10 mA
Voltage differential
AGND to PGND
±0.3 V
Operating virtual junction temperature range, TJ
40 to 125
°C
Storage temperature, Tstg
65 to 150
°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
300 °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” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Input voltage range, VI
Operating junction temperature, TJ
MIN NOM MAX UNIT
4 6V
40 125 °C
DISSIPATION RATINGS(1) (2)
PACKAGE
THERMAL IMPEDANCE
TA 25°C
JUNCTION-TO-AMBIENT POWER RATING
28-Pin PWP with solder
18.2 °C/W
5.49 W(2)
28-Pin PWP without solder
40.5 °C/W
2.48 W
(1) For more information on the PWP package, refer to TI technical brief, literature number SLMA002.
(2) Test Board Conditions:
1. 3” x 3”, 4 layers, thickness: 0.062”
2. 1.5 oz. copper traces located on the top of the PCB
3. 1.5 oz. copper ground plane on the bottom of the PCB
4. 0.5 oz. copper ground planes on the 2 internal layers
5. 12 thermal vias (see “Recommended Land Pattern” in applications section of this data sheet)
(3) Maximum power dissipation may be limited by over current protection.
TA = 70°C
POWER RATING
3.02 W
1.36 W
TA = 85°C
POWER RATING
2.20 W
0.99 W
2


Part Number TPS54810
Description SYNCHRONOUS BUCK PWM SWITCHER
Maker etcTI
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