Specification	TPS56921PWPR

Current - Output	9 A
Frequency - Switching [Max]	1.6 MHz
Frequency - Switching [Min]	200 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable (Programmable)
Package / Case	20-PowerTSSOP
Package / Case	0.173 in
Package / Case [custom]	4.4 mm
Supplier Device Package	20-HTSSOP
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	17 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max) [Max]	1.48 V
Voltage - Output (Min/Fixed)	0.72 V

TPS56921 Series

Part	Current - Output	Regulator Topology	Voltage - Output	Supplied Contents	Utilized IC / Part	Outputs and Type	Outputs and Type	Main Purpose	Frequency - Switching	Voltage - Input [Max]	Voltage - Input [Min]	Board Type	Voltage - Output (Min/Fixed)	Voltage - Output (Max) [Max]	Output Type	Output Configuration	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input (Min) [Min]	Number of Outputs	Supplier Device Package	Function	Package / Case	Package / Case [custom]	Package / Case	Voltage - Input (Max) [Max]	Frequency - Switching [Min]	Frequency - Switching [Max]	Topology
Texas Instruments TPS56921EVM-188	9 A	Buck	1.1 V	Board(s)	TPS56921	Non-Isolated	1	DC/DC Step Down	500 kHz	17 V	4.5 V	Fully Populated
Texas Instruments TPS56921PWPR	9 A												0.72 V	1.48 V	Adjustable (Programmable)	Positive	Surface Mount	-40 °C	125 ¯C	4.5 V	1	20-HTSSOP	Step-Down	20-PowerTSSOP	4.4 mm	0.173 in	17 V	200 kHz	1.6 MHz	Buck
Texas Instruments TPS56921PWP	9 A												0.72 V	1.48 V	Adjustable (Programmable)	Positive	Surface Mount	-40 °C	125 ¯C	4.5 V	1	20-HTSSOP	Step-Down	20-PowerTSSOP	4.4 mm	0.173 in	17 V	200 kHz	1.6 MHz	Buck

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	2000	$ 1.62
		6000	$ 1.56
Texas Instruments	LARGE T&R	1	$ 2.68
		100	$ 2.35
		250	$ 1.65
		1000	$ 1.33

Description

General part information

TPS56921 Series

The TPS56921 in thermally enhanced 20-pin HTSSOP package is a full featured 17V, 9A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. After the initial power-up, the output voltage can be changed by codes sent to the IC via an I2C compatible VID Control bus. Current mode control provides space savings and easy compensation.

The output voltage startup ramp is controlled by the SS pin which helps to control startup inrush current. Power sequencing is supported by configuring the enable and the open drain power good pins. The output voltage is user-configurable at startup by external voltage divider.

Cycle by cycle current limiting on the high-side fet protects the TPS56921 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.

Documents

Technical documentation and resources

4.5V to 17V Input, 9A Synchronous Step Down SWIFT™ Converter With VID Control datasheet

Data sheet