Specification	TPS40074RHLR

Clock Sync	True
Control Features	Current Limit, Power Good, Soft Start, Frequency Control, Enable
Duty Cycle (Max)	95 %
Frequency - Switching [Max]	1 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	20-VFQFN Exposed Pad
Supplier Device Package	20-VQFN (3.5x4.5)
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	28 V
Voltage - Supply (Vcc/Vdd) [Min]	4.5 V

TPS40074 Series

Part	Output Type	Frequency - Switching [Max]	Topology	Function	Output Configuration	Output Phases	Duty Cycle (Max)	Package / Case	Supplier Device Package	Control Features	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs	Mounting Type	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]
Texas Instruments TPS40074RHLTG4	Transistor Driver	1 MHz	Buck	Step-Down	Positive	1	95 %	20-VFQFN Exposed Pad	20-VQFN (3.5x4.5)	Current Limit Enable Frequency Control Power Good Soft Start	85 °C	-40 °C	1	Surface Mount	4.5 V	28 V
Texas Instruments TPS40074RHLR	Transistor Driver	1 MHz	Buck	Step-Down	Positive	1	95 %	20-VFQFN Exposed Pad	20-VQFN (3.5x4.5)	Current Limit Enable Frequency Control Power Good Soft Start	85 °C	-40 °C	1	Surface Mount	4.5 V	28 V
Texas Instruments TPS40074RHLT	Transistor Driver	1 MHz	Buck	Step-Down	Positive	1	95 %	20-VFQFN Exposed Pad	20-VQFN (3.5x4.5)	Current Limit Enable Frequency Control Power Good Soft Start	85 °C	-40 °C	1	Surface Mount	4.5 V	28 V

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	$ 4.02
		10	$ 3.61
		25	$ 3.42
		100	$ 2.96
		250	$ 2.81
		500	$ 2.52
		1000	$ 2.13
	Digi-Reel®	1	$ 4.02
		10	$ 3.61
		25	$ 3.42
		100	$ 2.96
		250	$ 2.81
		500	$ 2.52
		1000	$ 2.13
	Tape & Reel (TR)	3000	$ 2.02
Texas Instruments	LARGE T&R	1	$ 3.33
		100	$ 2.92
		250	$ 2.05
		1000	$ 1.65

Description

General part information

TPS40074 Series

The TPS40074 is a mid voltage, wide input (4.5-V to 28-V), synchronous, step-down controller, offering design flexibility for a variety of user programmable functions, including; soft start, UVLO, operating frequency, voltage feed-forward and high-side FET sensed short circuit protection.

The TPS40074 incorporates MOSFET gate drivers for external N-channel high side and synchronous rectifier (SR) MOSFETs. The gate drive logic incorporates second generation predictive anti-cross conduction circuitry to prevent simultaneous high side and synchronous rectifier conduction, while minimizing to eliminating current flow in the body diode of the SR FET. The TPS40074 allows for starting into pre-biased outputs by not allowing the synchronous rectifier FET to turn on until the commanded voltage during soft start is greater than the existing pre-bias voltage.

The TPS40074 uses voltage feed-forward control techniques to provide good line regulation over a wide input voltage range, and fast response to input line transients. Voltage feed-forward also provides nearly constant power stage gain with input variation to ease loop compensation of wide input range designs. The externally programmable short circuit protection provides fault current limiting, as well as hiccup mode operation for low power dissipation in the presence of a shorted output. The TPS40074 is packaged in a 20-pin QFN package for better thermal performance at higher voltages and frequencies, as well as reduced footprint.

Documents

Technical documentation and resources

Midrange Input Synchronous Buck Controller With Voltage Feed-Forward datasheet (Rev. B)

Data sheet

TPS40074 Errata

Errata