LM2757TM/NOPB

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Texas Instruments

SWITCHED CAPACITOR BOOST REGULATOR WITH HIGH IMPEDANCE OUTPUT IN SHUTDOWN

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LM2757TM/NOPB

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Texas Instruments

SWITCHED CAPACITOR BOOST REGULATOR WITH HIGH IMPEDANCE OUTPUT IN SHUTDOWN

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Description Specifications Series Pricing CAD Documents

Description

General part information

LM2757 Series

The LM2757 is a constant-frequency pre-regulated switched-capacitor charge pump that operates at 1.25 MHz to produce a low-noise regulated output voltage. The device can be configured to provide up to 100 mA at 4.1 V, 110 mA at 4.5 V, or 180 mA at 5 V. Excellent efficiency is achieved without the use of an inductor by operating the charge pump in a gain of either 3/2 or 2 according to the input voltage and output voltage option selection.

The LM2757 presents a high impedance at the VOUTpin when shut down. This allows for use in applications that require the regulated output bus to be driven by another supply while the LM2757 is shut down.

The LM2757 device comes in a tiny 12-pin 0.4-mm pitch DSBGA package. A perfect fit for space-constrained, battery-operated applications, the device requires only 4 small, inexpensive ceramic capacitors. Built-in soft-start, overcurrent protection, and thermal shutdown features are also included in this device.

Technical Specifications

Parameters and characteristics for this part

Specification	LM2757TM/NOPB

Current - Output	180 mA
Frequency - Switching	1.242 MHz
Function	Step-Up
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-30 °C
Output Configuration	Positive
Output Type	Programmable
Package / Case	12-WFBGA, DSBGA
Package Name	12-DSBGA
Synchronous Rectifier	No
Topology	Charge Pump
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.7 V
Voltage - Output (Min/Fixed)	5 V, 4.1 V, 4.5 V

LM2757 Series

Part	Utilized IC / Part	Total Output Count	Output Type	Non-Isolated Output Count	Frequency - Switching	Main Purpose	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Contents	Voltage - Output	Voltage - Output	Regulator Topology	Current - Output	Function	Number of Outputs	Synchronous Rectifier	Topology	Output Configuration	Package Name	Voltage - Input (Max)	Voltage - Input (Min)	Voltage - Output (Min/Fixed)	Mounting Type	Operating Temperature (Max)	Operating Temperature (Min)	Package / Case	Package Length	Package Width
Texas Instruments LM2757TMEV	LM2757	1	Non-Isolated	1 count	1.24 MHz	DC/DC Step Up	2.7 V	5.5 V	Board	4.1V 4.5V 5V	4.1 V 4.5 V 5 VDC	Boost	180 mA
Texas Instruments LM2757TM/NOPB			Programmable		1.242 MHz								180 mA	Step-Up	1	No	Charge Pump	Positive	12-DSBGA	5.5 V	2.7 V	4.1 V 4.5 V 5 V	Surface Mount	85 °C	-30 °C	12-WFBGA DSBGA
Texas Instruments LM2757TMX/NOPB			Programmable		1.242 MHz								180 mA	Step-Up	1	No	Charge Pump	Positive	12-DSBGA	5.5 V	2.7 V	4.1 V 4.5 V 5 V	Surface Mount	85 °C	-30 °C	12-WFBGA DSBGA	1.64 mm	1.24 mm

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Designing Energy-Efficient Handheld Illum Solutions (Rev. A)

The Forgotten Converter

AN-1731 LM2757 Evaluation Board (Rev. A)

LM2757 Switched-Capacitor Boost Regulator With High Impedance Output in Shutdown datasheet (Rev. F)

How to Meet the HDMI 5V Source Requirement (Rev. C)