TPS54312 Status: ACTIVE

Low Input Voltage 3A Synchronous Step Down SWIFT™ Converter with 1.2V Output

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Datasheet

3-V to 6-V Input, 3-A Output Synchronous-Buck PWM Switcher w/Integrated FETs (Rev. B) (PDF 748 KB)
21 Apr 2005

	TPS54312
Iout(Max)(A)	3
Vin(Min)(V)	3
Vin(Max)(V)	6
Preset Vout(V)	1.2
Iq(Typ)(mA)	6.2
Switching Frequency(Max)(kHz)	700
Switch Current Limit(Typ)(A)	4
Topology	Buck
Pin/Package	20HTSSOP
Rating	Catalog
Duty Cycle(Max)(%)	90
Regulated Outputs(#)	1
Thermal Shutdown	Yes
	Samples
	Inventory

Other qualified versions of TPS54312

Version	Part Number	Definition
Automotive	TPS54312-Q1	Q100 devices qualified for high-reliability automotive applications targeting zero defects
Enhanced Product	TPS54312-EP	Supports Defense, Aerospace and Medical Applications

Customers Who Evaluated This Product Also Evaluated

TPS54620: 4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter
TPS54310: 3V to 6V, 3A Synchronous Step Down SWIFT™ Converter
TPS65131: 800mA/1950mA Boost Current w/ Pos.& Neg.(Dual) output for OLED & CCD sensor, 24 QFN
TPS51200: Sink/Source DDR Termination Regulator
TPS61170: 1.2A Switch, High Voltage Boost Converter in 2x2mm QFN Package

Product Information

Features

60-m MOSFET Switches for High Efficiency at 3-A Continuous Output Source or Sink Current
0.9-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V and 3.3-V Fixed Output Voltage Devices With 1% Initial Accuracy
Internally Compensated for Low Parts Count
Fast Transient Response
Wide PWM Frequency: Fixed 350 kHz, 550 kHz or Adjustable 280 kHz to 700 kHz
Load Protected by Peak Current Limit and Thermal Shutdown
Integrated Solution Reduces Board Area and Total Cost
APPLICATIONS
- Low-Voltage, High-Density Systems With Power Distributed at 5 V or 3.3 V
- Point of Load Regulation for High-Performance DSPs, FPGAs, ASICs, and Microprocessors
- Broadband, Networking, and Optical Communications Infrastructure
- Portable Computing/Notebook PCs

SWIFT and PowerPAD are trademarks of Texas Instruments.

Description

As members of the SWIFT family of dc/dc regulators, the TPS54311, TPS54312, TPS54313, TPS54314, TPS54315 and TPS54316 low-input-voltage high-output-current synchronous-buck PWM convertersintegrate all required active components. Included on the substrate with the listed features are a true, high performance, voltage error amplifier that provides fast response under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally and 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 TPS54311, TPS54312, TPS54313, TPS54314, TPS54315 and TPS54316 devices devices are available in a thermally enhanced 20-pin TSSOP (PWP) PowerPAD™ package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFT designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

Pricing / Packaging / CAD Design Tools / Samples

		Price	Packaging			CAD Design Tools	Samples
Device	Status	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Samples
TPS54312PWP	ACTIVE	2.50 \| 1ku	HTSSOP (PWP) \| 20	View	70 \| TUBE
TPS54312PWPG4	ACTIVE	2.50 \| 1ku	HTSSOP (PWP) \| 20	View	70 \| TUBE
TPS54312PWPR	ACTIVE	2.25 \| 1ku	HTSSOP (PWP) \| 20	View	2000 \| LARGE T&R	Purchase Samples
TPS54312PWPRG4	ACTIVE	2.25 \| 1ku	HTSSOP (PWP) \| 20	View	2000 \| LARGE T&R	Purchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 10:03 AM GMT, 06 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksTPS54312PWP
Americas	Arrow	1
Americas	Rochester Electronics	522
Asia	Farnell Asia	99
Europe	Avnet-SILICA	160
	Compel	239
	Farnell	92
TI Lead Time*: 20 WeeksTPS54312PWPG4
None Reported View Distributors
TI Lead Time*: 20 WeeksTPS54312PWPR
Americas	Rochester Electronics	>1k
TI Lead Time*: 20 WeeksTPS54312PWPRG4
None Reported View Distributors
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
TPS54312PWP	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS54312PWPG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS54312PWPR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS54312PWPRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for TPS54312

Tools & Software

*Required

Design Now with SwitcherPro™

Enter your design parameters below to design now with SwitcherPro™

Input
		Min	Max
*	Vin Min:	3 V	6 V
*	Vin Max:	3 V	6 V

Output
		Min	Max
*	Vout:	1.2 V	1.2 V
*	Iout Max:	0.0 A	3 A

Search for more Power Management devices with Power Quick Search on power.ti.com
To learn more about SwitcherPro™ visit www.ti.com/switcherpro

Name	Part #	Company	Tool / Software Type
3-A, 3-6 Vin DC/DC Converter with 1.8V Fixed Output	TPS54314EVM	Texas Instruments	Development Boards/EVMs
SwitcherPro(TM) Online and Desktop Design Creator and Management Software	SWITCHERPRO	Texas Instruments	Application Software

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
TPS54620	4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS	TI customers also evaluated this product.
TPS54310	3V to 6V, 3A Synchronous Step Down SWIFT™ Converter	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS	TI customers also evaluated this product.
TPS65131	800mA/1950mA Boost Current w/ Pos.& Neg.(Dual) output for OLED & CCD sensor, 24 QFN	LIGHTING AND DISPLAY SOLUTIONS-LCD/OLED DISPLAY BIAS SOLUTIONS	TI customers also evaluated this product.
TPS51200	Sink/Source DDR Termination Regulator	LINEAR REGULATORS-SINGLE CHANNEL LDO	TI customers also evaluated this product.
TPS61170	1.2A Switch, High Voltage Boost Converter in 2x2mm QFN Package	DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-UP REGULATORS	TI customers also evaluated this product.
LP2985A-50	Single Output LDO, 150mA, Fixed(5.0V), 1.0% Tolerance, Low Quiescent Current, Low Noise	LINEAR REGULATORS-SINGLE CHANNEL LDO	TI customers also evaluated this product.
BQ20Z95	SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track	BATTERY MANAGEMENT-BATTERY FUEL GAUGES	TI customers also evaluated this product.

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TPS54312 Status: ACTIVE

Low Input Voltage 3A Synchronous Step Down SWIFT™ Converter with 1.2V Output

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