28-V, 85% Efficient Boost Converter in QFN-8 for LCD Applications - TPS61045

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Features	Samples	Technical Documents
Quality & Pb-Free Data	Pricing/Packaging	Application Notes
Related Products	Inventory	Simulation Models
Tools & Software	Symbols/Footprints	Reference Designs

Datasheet

	TPS61045, Digitally Adjustable LCD Boost Converter (Rev. A) (tps61045.pdf, 867 KB) 23 Sep 2003 Download

	TPS61040	TPS61041	TPS61042	TPS61043	TPS61045
Topology	Boost	Boost	Boost	Boost	Boost
Type	Inductive	Inductive	Inductive	Inductive	Inductive
Vin(Min)(V)	1.8	1.8	1.8	1.8	1.8
Vin(Max)(V)	6	6	6	6	6
Switch Current Limit(Typ)(A)	0.4	0.25	0.5	0.5	0.45
Output Voltage(Max)(V)	28	28	28	16.9	28
Switching Frequency(Max)(kHz)	1000	1000	1000	1000	1000
LED(#)	6	4	6	4	1 OLED or 6
LED Configuration	Series	Series	Series	Series	Series
Over-Voltage Protection(Min)(V)	No	No	28	17	No
Peak Efficiency(%)	86	85	85	85
Iq(Typ)(mA)	0.028	0.028	0.038	0.038	0.04
Operating Temp Range(Celsius)	-40 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Pin/Package	5SOT-23,6SON	5SOT-23,6SON	8SON	8SON	8SON
Iout(Max)(A)	0.09	0.05	0.03	0.03	0.02
Regulated Outputs(#)		1	1	1	1
	Samples	Samples	Samples	Samples	Samples
	Inventory	Inventory	Inventory	Inventory	Inventory

Product Information

Features

Input Voltage Range...1.8 V to 6.0 V
Up to 85% Efficiency
Digitally Adjustable Output Voltage Control
Disconnects Output From Input During Shutdown
Switching Frequency...Up to 1 MHz
No Load Quiescent Current...40 µA Typ
Thermal Shutdown Mode
Shutdown Current...0.1 µA Typ
Available in Small 3mm × 3mm QFN package
APPLICATIONS
- LCD Bias Supply For Small to Medium LCD Displays
- OLED Display Power Supply
  - PDA, Pocket PC, Smart Phones
  - Handheld Devices
  - Cellular Phones

Description

The TPS61045 is a high frequency boost converter with digitally programmable output voltage and true shutdown. During shutdown the output is disconnected from the input by opening the internal input switch. This allows a controlled power up/down sequencing of the display. The output voltage can be increased or decreased in digital steps by applying a logic signal to the CTRL pin. The output voltage range, as well as the output voltage step size, can be programmed with the feedback divider network. With a high switching frequency of up to 1 MHz the TPS61045 allows the use of small external components and together, with the small 8-pin QFN package, a minimum system solution size is achieved.

These Alternative Products:

TPS61040: 28-V, 400-mA Switch Boost Conv...
TPS61041: 28-V, 250-mA Switch Boost Conv...
TPS61043: TPS61043: Constant Current LED...
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These Complementary Products:

TL431A: Adjustable Precision Shunt Reg...
TPS3825-33: Processor Supervisory Circuits
TPS62040: Adjustable, 1.2-A, 95% Efficie...
More Complementary Products

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TPS61045, Status:ACTIVE
28-V, 85% Efficient Boost Converter in QFN-8 for LCD Applications

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Pricing/Packaging/CAD Design Tools/Samples
			Price	Packaging			CAD Design Tools	Samples
Device	Status	Temp (^oC)	Budget Price ($US) \| QTY	Industry Standard (TI Pkg) \| Pins	Top Side Marking	Standard Pack Quantity \| Package Carrier	Symbols	Samples
TPS61045DRBR	ACTIVE	-40 to 85		SON (DRB) \| 8	View	3000 \| LARGE T&R	Request Free Samples
TPS61045DRBRG4	ACTIVE	-40 to 85		SON (DRB) \| 8	View	3000 \| LARGE T&R	Request Free Samples
TPS61045DRBT	ACTIVE	-40 to 85	1.40 \| 100u	SON (DRB) \| 8	View	250 \| SMALL T&R	Purchase Samples
TPS61045DRBTG4	ACTIVE	-40 to 85	1.40 \| 100u	SON (DRB) \| 8	View	250 \| SMALL 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
	TI Inventory Status			Reported Distributor Inventory
TPS61045DRBR	As of 7:51 AM GMT, 20 Jul 2008			As of 7:51 AM GMT, 20 Jul 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	>10k*	9000 \| 27 Aug	6 Weeks	Americas	DigiKey	>1k
		3000 \| 29 Aug			Mouser Electronics	>1k
					Rochester Electronics	>1k
				Asia	WPI	>1k
TPS61045DRBRG4	As of 7:51 AM GMT, 20 Jul 2008			As of 7:51 AM GMT, 20 Jul 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	>10k*	9000 \| 27 Aug	6 Weeks	Americas	Rochester Electronics	>1k
	>10k*	3000 \| 29 Aug	6 Weeks
TPS61045DRBT	As of 7:51 AM GMT, 20 Jul 2008			As of 7:51 AM GMT, 20 Jul 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 8 Sep	6 Weeks	Europe	Avnet-SILICA	15
TPS61045DRBTG4	As of 7:51 AM GMT, 20 Jul 2008			As of 7:51 AM GMT, 20 Jul 2008
	In Stock	In Progress QTY \| Date	Lead Time	Region	Company	In Stock	Purchase
	0*	>10k \| 8 Sep	6 Weeks	Europe	Farnell	129

* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.

** 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
TPS61045DRBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61045DRBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61045DRBT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS61045DRBTG4	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

Datasheets

TPS61045, Digitally Adjustable LCD Boost Converter (Rev. A) (tps61045.pdf, 867 KB)
23 Sep 2003 Download

Application Notes

Optimizing Transient Response of Internally Compensated DC-DC Converters (slva289.htm, 8 KB)
28 Jan 2008 Abstract

QFN/SON PCB Attachment Application Report (Rev. A) (slua271a.htm, 8 KB)
25 Jul 2007 Abstract

Minimizing Ringing at the Switch Node of a Boost Converter (slva255.htm, 8 KB)
15 Sep 2006 Abstract

Performing Accurate PFM Mode Efficiency Measurements (slva236.htm, 8 KB)
18 Apr 2006 Abstract

TPS61040 Inverter Design (Rev. A) (slva008a.htm, 8 KB)
09 Jun 2003 Abstract

TPS61042 Dual Li-Ion and Higher Input Voltages (slva131.htm, 8 KB)
13 Mar 2003 Abstract

High Voltage Power Supply Using the TPS61040 (slua272.htm, 8 KB)
09 Jul 2002 Abstract

View Application Notes for White LED Drivers

User Guides

Low Cost Isolated Power Supply for PoE Applications (sluu167.htm, 8 KB)
20 May 2003 Abstract

TPS61045EVM-231: Adjustable LCD Boost Converter EVM (slvu082.htm, 8 KB)
22 Jan 2003 Abstract

Reference Designs

Description	Part #	Company
Power Over Ethernet - Sync Flyback Reference Design	PMP411	Texas Instruments

Tools & Software

Name	Part #	Company	Tool / Software Type
TPS61045 Evaluation Module	TPS61045EVM-231	Texas Instruments	Development Boards/EVMs

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