Texas Instruments-SN74LVC2G125YEAR Buffers and Line Drivers Buffer/Line Driver 2-CH Non-Inverting 3-ST CMOS 8-Pin DSBGA T/R

Integrated Circuits (ICs)

LMR70503TMX/NOPB

Active

CONV DC-DC 2.8V TO 5.5V INV/STEP UP/STEP DOWN SINGLE-OUT -0.9V TO -5.5V 0.3A 8-PIN DSBGA T/R

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Search across all available documentation for this part.

DocumentsSemiconductor and IC Package Thermal Metrics (Rev. D)AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)+12

Integrated Circuits (ICs)

LMR70503TMX/NOPB

Active

Texas Instruments

CONV DC-DC 2.8V TO 5.5V INV/STEP UP/STEP DOWN SINGLE-OUT -0.9V TO -5.5V 0.3A 8-PIN DSBGA T/R

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DocumentsSemiconductor and IC Package Thermal Metrics (Rev. D)AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)+12

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LMR70503TMX/NOPB

Current - Output	270 mA
Frequency - Switching	500 kHz
Function	Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Negative
Output Type	Adjustable
Package / Case	8-WFBGA, DSBGA
Supplier Device Package	8-DSBGA
Synchronous Rectifier	False
Topology	Buck-Boost
Voltage - Input (Max) [Max]	5.5 V
Voltage - Input (Min) [Min]	2.8 V
Voltage - Output (Max) [Max]	-5.5 V
Voltage - Output (Min/Fixed)	-1 V

LMR70503 Series

2.8V to 5.5V, 300mA Buck/Boost Negative Output Voltage Regulator

Part	Current - Output	Frequency - Switching	Voltage - Input [Min]	Voltage - Input [Max]	Supplied Contents	Board Type	Voltage - Output [Max]	Voltage - Output [Min]	Regulator Topology	Outputs and Type	Outputs and Type	Main Purpose	Utilized IC / Part	Voltage - Input (Max) [Max]	Output Type	Voltage - Output (Min/Fixed)	Supplier Device Package	Function	Package / Case	Output Configuration	Mounting Type	Topology	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Max) [Max]	Voltage - Input (Min) [Min]
Texas Instruments LMR70503EVM/NOPB	320 mA	500 kHz	2.8 V	5.5 V	Board(s)	Fully Populated	-5.5 V	-9 V	Buck-Boost	Non-Isolated	1	DC/DC Negative Inverter	LMR70503
Texas Instruments LMR70503TMX/NOPB	270 mA	500 kHz												5.5 V	Adjustable	-1 V	8-DSBGA	Step-Up/Step-Down	8-WFBGA DSBGA	Negative	Surface Mount	Buck-Boost	1	-40 °C	125 ¯C	-5.5 V	2.8 V
Texas Instruments LMR70503TM/NOPB	270 mA	500 kHz												5.5 V	Adjustable	-1 V	8-DSBGA	Step-Up/Step-Down	8-WFBGA DSBGA	Negative	Surface Mount	Buck-Boost	1	-40 °C	125 ¯C	-5.5 V	2.8 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Arrow	N/A	3000	$ 0.86
Digikey	Cut Tape (CT)	1	$ 1.88
		10	$ 1.69
		25	$ 1.60
		100	$ 1.36
		250	$ 1.28
		500	$ 1.12
		1000	$ 1.28
	Digi-Reel®	1	$ 1.88
		10	$ 1.69
		25	$ 1.60
		100	$ 1.36
		250	$ 1.28
		500	$ 1.12
		1000	$ 1.28
	Tape & Reel (TR)	3000	$ 1.12
Texas Instruments	LARGE T&R	1	$ 1.57
		100	$ 1.29
		250	$ 0.93
		1000	$ 0.70

Description

General part information

LMR70503 Series

The LMR70503 is a buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin DSBGA package. Its unique control method is designed to provide fast transient response, low output noise, high efficiency, and tight regulation in the smallest possible PCB area. The LMR70503 has built in soft start, peak current limit, minimum switching frequency, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the Enable pin is referred to the IC ground, instead of the lowest potential of the IC: the negative output voltage.

Documents

Technical documentation and resources

Semiconductor and IC Package Thermal Metrics (Rev. D)

Application note

AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)

Application note

LMR70503 Buck-Boost Converter For Negative Output Voltage in DSBGA datasheet (Rev. A)

Data sheet

AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)

Application note

AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)

Application note

Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)

Application note

Input and Output Capacitor Selection

Application note

Power Management Guide 2018 (Rev. R)

Selection guide

LMR70503TMX/NOPB

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LMR70503TMX/NOPB

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Technical Specifications

LMR70503 Series

Pricing

Description

LMR70503 Series

Documents

Semiconductor and IC Package Thermal Metrics (Rev. D)

AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)

LMR70503 Buck-Boost Converter For Negative Output Voltage in DSBGA datasheet (Rev. A)

AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)

AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)

AN-643 EMI/RFI Board Design (Rev. B)

AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)

AN-2264 LMR70503 Demo Board (Rev. A)

Buck-Boost Converters Solving Power Challenges in Optical Modules

AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)

AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)

Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B)

Input and Output Capacitor Selection

Power Management Guide 2018 (Rev. R)

LMR70503 Series