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Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

TPS54618QRTERQ1

Texas Instruments · DC-DC Converters · WQFN-16-EP(3x3)

TPS54618QRTERQ1 from Texas Instruments, in a WQFN-16-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VIN	power_in	Input supply voltage, 2.95 V to 6 V.
2	VIN	power_in	Input supply voltage, 2.95 V to 6 V.
3	GND	power_in	Power ground, to be electrically connected directly to the power pad under the device.
4	GND	power_in	Power ground, to be electrically connected directly to the power pad under the device.
5	AGND	power_in	Analog ground, to be electrically connected to GND close to the device.
6	VSENSE	input	Inverting node of the transconductance (gm) error amplifier.
7	COMP	output	Error amplifier output and input to the output switch current comparator; connect frequency compensation components to this pin.
8	RT/CLK	bidirectional	Resistor timing or external clock input pin.
9	SS/TR	bidirectional	Slow-start and tracking pin; an external capacitor sets the output voltage rise time, and the pin can also be used for tracking.
10	PH	output	Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET.
11	PH	output	Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET.
12	PH	output	Source of the internal high-side power MOSFET and drain of the internal low-side (synchronous) rectifier MOSFET.
13	BOOT	passive	Bootstrap capacitor connection required between BOOT and PH; output is forced off if the capacitor voltage is below the BOOT UVLO minimum.
14	PWRGD	output	Open-drain output that asserts low if output voltage is low due to thermal shutdown, overcurrent, over/undervoltage or EN shutdown.
15	EN	input	Enable pin with internal pullup current source; pull below 1.2 V to disable, float to enable, and use two resistors to adjust the UVLO threshold.
16	VIN	power_in	Input supply voltage, 2.95 V to 6 V.
17	Thermal Pad	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	WQFN-16-EP(3x3)
Category	Power Supply Chip
Pins	17

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Input voltage (PWRGD, VIN)		-0.3		7	V		4
Input voltage (EN, RT/CLK)		-0.3		4	V		4
Input voltage (COMP, SS, VSENSE)		-0.3		3	V		4
Output voltage BOOT-PH				7	V		4
Output voltage PH		-0.6		7	V		4
Output voltage PH (10-ns transient)		-2		10	V	10-ns transient	4
Source current EN, RT/CLK				100	µA		4
Sink current COMP, SS				100	µA		4
Sink current PWRGD				10	mA		4
Operating junction temperature	TJ	-40		150	°C		4
Storage temperature	Tstg	-65		150	°C		4
Input voltage	VVIN	3		6	V		4
Operating ambient temperature	TA	-40		125	°C		4
Operating input voltage		2.95		6	V		5
VIN UVLO STOP		2.28		2.5	V		5
VIN UVLO START		2.45		2.6	V		5
Shutdown supply current			5.5	15	μA	EN = 0 V, 25°C, 2.95 V ≤ VIN ≤ 6 V	5
Quiescent current	Iq		515	650	μA	VSENSE = 0.9 V, VIN = 5 V, 25°C, RT = 400 kΩ	5
Voltage reference	Vref	0.791	0.799	0.807	V	2.95 V ≤ VIN ≤ 6 V, -40°C <TJ < 150°C	5
High-side switch resistance			12	25	mΩ	BOOT-PH = 5 V	5
High-side switch resistance			16	33	mΩ	BOOT-PH = 2.95 V	5
Low-side switch resistance			13	25	mΩ	VIN = 5 V	5
Low-side switch resistance			17	33	mΩ	VIN = 2.95 V	5
Current limit threshold		7.46	10.6	15.3	A	VIN = 6 V, 25°C < TJ < 150°C	5
Current limit threshold		7.68	10.2	13.5	A	VIN = 2.95 V, 25°C < TJ < 150°C	5
Switching frequency		400	500	600	kHz	Rt = 400 kΩ	6
Switching frequency range using RT mode		200		2000	kHz		6
Switching frequency range using CLK mode		300		2000	kHz		6
RT/CLK high threshold			1.6	2.2	V		6
RT/CLK low threshold		0.4		0.6	V		6
PWRGD ON-resistance			56	100	Ω		6
PWRGD output low			0.2	0.3	V	I(PWRGD) = 3 mA	6
Minimum VIN for valid output			0.65	1.5	V	V(PWRGD) < 0.5 V at 100 μA	6
Minimum CLK pulse width			75		ns		6
Junction-to-ambient thermal resistance	RθJA		44.38		°C/W	RTE (WQFN) 16 pins	4
Junction-to-case (top) thermal resistance	RθJC(top)		46.09		°C/W		4
Junction-to-board thermal resistance	RθJB		15.96		°C/W		4
Junction-to-case (bottom) thermal resistance	RθJC(bot)		4.55		°C/W		4

CAD (KiCad official)

Symbol: TPS54618QRTERQ1
Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)
3D model files: tps54618qrterq1-etched.step / tps54618qrterq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tps54618qrterq1.step / tps54618qrterq1.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (39 pp, sha256 bd3d217442016b00, retrieved 2026-10-23, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF