Specification	LM51551QDSSTQ1

Clock Sync	True
Control Features	Soft Start
Duty Cycle (Max) [Max]	93 %
Frequency - Switching [Max]	2.2 MHz
Frequency - Switching [Min]	100 kHz
Function	Step-Up, Step-Up/Step-Down
Grade	Automotive
Mounting Type	Wettable Flank, Surface Mount
Number of Outputs	1
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	12-WFDFN Exposed Pad
Qualification	AEC-Q100
Supplier Device Package	12-WSON (3x2)
Synchronous Rectifier	False
Topology	Flyback, SEPIC, Boost
Voltage - Supply (Vcc/Vdd) [Max]	45 V
Voltage - Supply (Vcc/Vdd) [Min]	2.97 V

LM51551-Q1 Series

2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, hiccup mode protection

Part	Qualification	Frequency - Switching [Min]	Frequency - Switching [Max]	Package / Case	Output Configuration	Mounting Type	Number of Outputs	Grade	Function	Control Features	Duty Cycle (Max) [Max]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Output Phases	Supplier Device Package
Texas Instruments LM51551QDSSRQ1	AEC-Q100	100 kHz	2.2 MHz	12-WFDFN Exposed Pad	Positive	Surface Mount Wettable Flank	1	Automotive	Step-Up Step-Up/Step-Down	Soft Start	93 %	45 V	2.97 V	Transistor Driver	150 °C	-40 °C	Boost Flyback SEPIC	1	12-WSON (3x2)
Texas Instruments LM51551QUDSSTQ1	AEC-Q100	100 kHz	2.2 MHz	12-WFDFN Exposed Pad	Positive	Surface Mount	1	Automotive	Step-Up Step-Up/Step-Down	Soft Start	93 %	16 V 45 V	2.97 V 3.5 V	Transistor Driver	125 °C	-40 °C	Boost Flyback SEPIC	1	12-WSON (3x2)
Texas Instruments LM51551QDSSTQ1	AEC-Q100	100 kHz	2.2 MHz	12-WFDFN Exposed Pad	Positive	Surface Mount Wettable Flank	1	Automotive	Step-Up Step-Up/Step-Down	Soft Start	93 %	45 V	2.97 V	Transistor Driver	150 °C	-40 °C	Boost Flyback SEPIC	1	12-WSON (3x2)
Texas Instruments LM51551QUDSSRQ1	AEC-Q100	100 kHz	2.2 MHz	12-WFDFN Exposed Pad	Positive	Surface Mount	1	Automotive	Step-Up Step-Up/Step-Down	Soft Start	93 %	16 V 45 V	2.97 V 3.5 V	Transistor Driver	125 °C	-40 °C	Boost Flyback SEPIC	1	12-WSON (3x2)

Pricing

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

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 3.27
		10	$ 2.94
		25	$ 2.77
		100	$ 2.40
	Digi-Reel®	1	$ 3.27
		10	$ 2.94
		25	$ 2.77
		100	$ 2.40
	Tape & Reel (TR)	250	$ 2.28
		500	$ 2.05
		1250	$ 1.73
		2500	$ 1.64
		6250	$ 1.58
Texas Instruments	SMALL T&R	1	$ 2.87
		100	$ 2.37
		250	$ 1.70
		1000	$ 1.28

Description

General part information

LM51551-Q1 Series

The LM5155x-Q1 (LM5155-Q1 and LM51551-Q1) is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.

The LM5155x-Q1 can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.

The LM5155x-Q1 (LM5155-Q1 and LM51551-Q1) is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.