BQ24073RGTR from Texas Instruments, in a QFN-16-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	TS	input	External NTC thermistor input. Connect to a 10 kΩ NTC in the battery pack to monitor pack temperature. If unused, tie to VSS through a fixed 10 kΩ resistor to maintain a valid voltage.
2	BAT	power_out	Charger power stage output and battery voltage sense. Connect to the positive terminal of the battery; bypass to VSS with a 4.7 µF to 47 µF ceramic capacitor. Pins 2 and 3 are internally tied together.
3	BAT	power_out	Charger power stage output and battery voltage sense. Connect to the positive terminal of the battery; bypass to VSS with a 4.7 µF to 47 µF ceramic capacitor. Pins 2 and 3 are internally tied together.
4	CE	input	Charge enable, active-low. Drive high to disable the battery charger (OUT and battery supplement mode still available); drive low to enable charging. Internally pulled down through ~285 kΩ; do not leave floating.
5	EN2	input	Input current limit configuration bit 2 (with EN1) for USB compliance and ILIM enable. See EN1/EN2 table. Internally pulled down through ~285 kΩ; do not leave floating.
6	EN1	input	Input current limit configuration bit 1 (with EN2) for USB compliance and ILIM enable. See EN1/EN2 table. Internally pulled down through ~285 kΩ; do not leave floating.
7	PGOOD	output	Open-drain power good status. Pulls to VSS when a valid input source within limits is detected; high-impedance otherwise. Tie to a 1 kΩ-100 kΩ pull-up to the logic rail or use with an LED.
8	VSS	power_in	Ground. Connect to the thermal pad and to the circuit ground rail.
9	CHG	output	Open-drain charging status indicator (active-low). Pulls to VSS while the battery is charging and is high-impedance when charging is complete or the charger is disabled. Pull up through a 1 kΩ-100 kΩ resistor to the logic rail or drive an LED.
10	OUT	power_out	Regulated system supply output from the power-path stage. Delivers a regulated voltage (BQ24073: 4.4 V) when the input is within range, otherwise connects to VBAT. Bypass to VSS with a 4.7 µF to 47 µF ceramic capacitor; pins 10 and 11 are tied together.
11	OUT	power_out	Regulated system supply output from the power-path stage. Delivers a regulated voltage (BQ24073: 4.4 V) when the input is within range, otherwise connects to VBAT. Bypass to VSS with a 4.7 µF to 47 µF ceramic capacitor; pins 10 and 11 are tied together.
12	ILIM	input	Adjustable input current limit programming pin. Connect a 1100 Ω to 8 kΩ resistor from ILIM to VSS to set the maximum input current when EN2=1, EN1=0. Leaving ILIM unconnected disables all charging.
13	IN	power_in	Input power from AC adapter or USB port. Operating range 4.35 V to 6.6 V (BQ24073); withstands up to 26 V without damage but operation is suspended above OVP (6.6 V). Bypass to VSS with 1 µF to 10 µF ceramic.
14	TMR	input	Safety-timer programming input. Tie to VSS to disable all safety timers; connect an 18 kΩ to 72 kΩ resistor from TMR to VSS to program pre-charge and fast-charge timer lengths. Leave floating for default timers.
15	TD	input	Termination-disable input. Drive high to disable charge termination; tie to VSS to enable termination. Sampled at startup only. Internally pulled down through ~285 kΩ; do not leave floating.
16	ISET	bidirectional	Fast-charge current programming and monitor pin. Connect a 590 Ω to 8.9 kΩ resistor from ISET to VSS to set fast-charge current; the voltage at ISET mirrors the actual charge current. Leaving ISET floating disables charging.
17	PAD	power_in	Exposed thermal pad, internally tied to VSS. Must be soldered to the PCB ground plane at the same potential as VSS for thermal performance; do not use as the primary ground path - pin 8 (VSS) must still be connected to ground.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	QFN-16-EP(3x3)
Category	PMIC
Pins	17

Ordering variants

Same part, different packaging or reel option.

BQ24073RGTR
BQ24073RGTRRGTT
BQ24072RGTR
BQ24072RGTT
BQ24074RGTR
BQ24074RGTT
BQ24075RGTR
BQ24075RGTT
BQ24079RGTR
BQ24079RGTT

CAD (KiCad official)

Symbol: BQ24073RGTR
Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (53 pp, sha256 3c8a0a906dc305bc, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF