Figure 4-1. DDC Package 6-Pin …

TPS54302DDC

Voltage Regulators - DC DC Switching RegulatorsSOT-23-THIN

IC REG BUCK SYNC 4.5V-28V 3A 6-SOT-23

TPS54302DDC is a 4.5V to 28V input, 3A output synchronous step-down converter in SOT-23-THIN (6) package, featuring integrated 85mΩ and 40mΩ MOSFETs, fixed 400kHz switching frequency, and EMI-friendly design.Checked against the datasheet

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Technical parameters

Key specs

Input voltage4.5 ~ 28 V

Output current3 AMax

Switching frequency290 ~ 510 kHz

Datasheet-verified parameters

25 items

Parameter	Value and test conditions	Source
Input voltage range	4.5 V to 28 V
Output current	3 A continuous
Switching frequency	400 kHz (Typ), 290 kHz (Min), 510 kHz (Max)
Package	SOT-23-THIN (DDC), 6-Pin
Operating junction temperature	-40 °C to 125 °C
RoHS	Yes
Quiescent current	45 μA (Typ), EN = 5V, VFB = 1V
Shutdown current	2 μA (Typ), EN = GND
High-side FET on resistance	85 mΩ (Typ), TA = 25°C, VBST-SW = 5V
Low-side FET on resistance	40 mΩ (Typ), TA = 25°C, VIN = 12V
Feedback Voltage	0.596 V (Typ), 0.581 V (Min), 0.611 V (Max), VIN = 12V
VIN under voltage lockout	4.1 V (Typ, Rising), 3.6 V (Typ, Falling)
Enable threshold	1.23 V (Typ, Rising), 1.16 V (Typ, Falling)
High-side current limit	5 A (Typ), 4 A (Min), 6 A (Max)
Low-side source current limit	4 A (Typ), 3.1 A (Min), 5.5 A (Max)
Thermal Shutdown	160 °C (Max, Rising)
Absolute Maximum Ratings - Input voltage	-0.3 V to 30 V (VIN)
Absolute Maximum Ratings - Operating junction temperature	-40 °C to 150 °C
Recommended Operating Conditions - Input voltage	4.5 V to 28 V (VIN)
Recommended Operating Conditions - Operating junction temperature	-40 °C to 125 °C
ESD Human-body model	±2500 V
ESD Charged-device model	±1500 V
Soft start time	5 ms
Control mode	Peak current mode control
Light load mode	Advanced Eco-mode pulse skip

All parameters (9)ExpandCollapse

Power
Input voltage range	4.5 V to 28 V
Non switching quiescent current	45 μA (Typ)
Output Current	3A
Shut down current	2 μA (Typ)
AC and DC characteristics
Centre switching frequency	400 kHz (Typ)
Environment and package
Operating junction temperature	-40 °C to 125 °C
Package	SOT-23-THIN, 6
Other
High-side FET on resistance	85 mΩ (Typ)
Low-side FET on resistance	40 mΩ (Typ)

Pinout and package

Pin	Name	Function	Source
1		GND, Ground pin, Source terminal of low-side power NFET as well as the ground terminal for controller circuit
2		SW, Switch node connection between high-side NFET and low-side NFET
3		VIN, Input voltage supply pin, The drain terminal of high-side power NFET
4		FB, Converter feedback input, Connect to output voltage with feedback resistor divider
5		EN, Enable pin, Float the EN pin to enable
6		BOOT, Supply input for the high-side NFET gate drive circuit, Connect a 0.1μF capacitor between BOOT and SW pins

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DatasheetDatasheet · 2.2 MB · 2026-10-26

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