Integrated Circuits (ICs)

LM5122MHE/NOPB

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3-65V WIDE VIN, CURRENT MODE SYNCHRONOUS BOOST CONTROLLER WITH MULTIPHASE CAPABILITY

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DocumentsDesigning the front-end DC/DC conversion stage to withstand automotive transient How to design boost, SEPIC or flyback regulators with wide VIN power ICs +12

Integrated Circuits (ICs)

LM5122MHE/NOPB

Active

Texas Instruments

3-65V WIDE VIN, CURRENT MODE SYNCHRONOUS BOOST CONTROLLER WITH MULTIPHASE CAPABILITY

Deep-Dive with AI

DocumentsDesigning the front-end DC/DC conversion stage to withstand automotive transient How to design boost, SEPIC or flyback regulators with wide VIN power ICs +12

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM5122MHE/NOPB

Clock Sync	True
Control Features	Soft Start, Frequency Control
Duty Cycle (Max) [Max]	100 %
Frequency - Switching [Max]	1 MHz
Function	Step-Up
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	20-PowerTSSOP
Package / Case	0.173 in
Package / Case [custom]	4.4 mm
Supplier Device Package	20-HTSSOP
Synchronous Rectifier	True
Topology	Boost
Voltage - Supply (Vcc/Vdd) [Max]	65 V
Voltage - Supply (Vcc/Vdd) [Min]	4.5 V

LM5122-Q1 Series

Automotive, 3-V to 65-V wide VIN, current mode synchronous boost controller with multiphase

Part	Mounting Type	Duty Cycle (Max) [Max]	Number of Outputs	Output Configuration	Topology	Control Features	Function	Output Phases	Package / Case	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Type	Frequency - Switching [Max]	Supplier Device Package	Package / Case [custom]	Qualification	Grade	Frequency - Switching	Board Type	Outputs and Type	Outputs and Type	Main Purpose	Regulator Topology	Current - Output	Voltage - Input [Max]	Voltage - Input [Min]	Voltage - Output	Utilized IC / Part	Supplied Contents
Texas Instruments LM5122ZAPWPT	Surface Mount	100 %	1	Positive	Boost	Frequency Control Soft Start	Step-Up	1	0.173 in 4.4 mm	24-PowerTSSOP	-40 °C	125 ¯C	65 V	4.5 V	Transistor Driver	1 MHz	24-HTSSOP
Texas Instruments LM5122QMHE/NOPB	Surface Mount	100 %	1	Positive	Boost	Frequency Control Soft Start	Step-Up	1	0.173 in	20-PowerTSSOP	-40 °C	125 ¯C	65 V	4.5 V	Transistor Driver	1 MHz	20-HTSSOP	4.4 mm	AEC-Q100	Automotive
Texas Instruments LM5122MHE/NOPB	Surface Mount	100 %	1	Positive	Boost	Frequency Control Soft Start	Step-Up	1	0.173 in	20-PowerTSSOP	-40 °C	125 ¯C	65 V	4.5 V	Transistor Driver	1 MHz	20-HTSSOP	4.4 mm
Texas Instruments LM5122ZPWPT	Surface Mount	100 %	1	Positive	Boost	Frequency Control Soft Start	Step-Up	1	0.173 in 4.4 mm	24-PowerTSSOP	-40 °C	125 ¯C	65 V	4.5 V	Transistor Driver	1 MHz	24-HTSSOP
Texas Instruments LM5122ZPWPR	Surface Mount	100 %	1	Positive	Boost	Frequency Control Soft Start	Step-Up	1	0.173 in 4.4 mm	24-PowerTSSOP	-40 °C	125 ¯C	65 V	4.5 V	Transistor Driver	1 MHz	24-HTSSOP
Texas Instruments LM5122EVM-2PH																					250 kHz	Fully Populated	Non-Isolated	1	DC/DC Step Up	Boost	7 A	20 V	9 VDC	28 V	LM5122	Board(s)
Texas Instruments LM5122MHX/NOPB	Surface Mount	100 %	1	Positive	Boost	Frequency Control Soft Start	Step-Up	1	0.173 in	20-PowerTSSOP	-40 °C	125 ¯C	65 V	4.5 V	Transistor Driver	1 MHz	20-HTSSOP	4.4 mm
Texas Instruments LM5122MH/NOPB	Surface Mount	100 %	1	Positive	Boost	Frequency Control Soft Start	Step-Up	1	0.173 in	20-PowerTSSOP	-40 °C	125 ¯C	65 V	4.5 V	Transistor Driver	1 MHz	20-HTSSOP	4.4 mm
Texas Instruments LM5122QMH/NOPB	Surface Mount	100 %	1	Positive	Boost	Frequency Control Soft Start	Step-Up	1	0.173 in	20-PowerTSSOP	-40 °C	125 ¯C	65 V	4.5 V	Transistor Driver	1 MHz	20-HTSSOP	4.4 mm	AEC-Q100	Automotive

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	1	$ 4.68
		10	$ 3.57
		50	$ 3.29
Digikey	Cut Tape (CT)	1	$ 5.59
		10	$ 5.02
		25	$ 4.75
		100	$ 4.12
	Digi-Reel®	1	$ 5.59
		10	$ 5.02
		25	$ 4.75
		100	$ 4.12
	Tape & Reel (TR)	250	$ 3.91
		500	$ 3.50
		1250	$ 2.96
		2500	$ 2.81
Newark	Each (Supplied on Cut Tape)	1	$ 6.84
		10	$ 6.54
		25	$ 6.22
		50	$ 5.95
		100	$ 5.69
Texas Instruments	SMALL T&R	1	$ 4.22
		100	$ 3.70
		250	$ 2.59
		1000	$ 2.09

Description

General part information

LM5122-Q1 Series

The LM5122ZA is a multi-phase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak-current-mode control. Current-mode control provides inherent line feed forward, cycle-by-cycle current limiting, and ease of loop compensation.

The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved by two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode-emulation mode also enables discontinuous-mode operation for improved efficiency at light load conditions.

An internal charge pump allows 100% duty cycle for high-side synchronous switch (bypass operation). A 180° phase shifted clock output enables easy multi-phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup-mode current limit, and adjustable line undervoltage lockout.