BQ24070RHLR from Texas Instruments, in a QFN-20-EP(3.7x4.7). 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	VREF	power_out	Internal 3.3 V reference output. Active only when AC or USB input is present. Output current up to 20 mA; 0.1 µF decoupling capacitor recommended.
2	STAT1	output	Charge status output 1 (open-drain). Requires external pullup (≥1 kΩ). VOL ≤ 0.25 V at 5 mA.
3	STAT2	output	Charge status output 2 (open-drain). Requires external pullup (≥1 kΩ). Combined with STAT1 to encode charge state.
4	IN	power_in	Charge input voltage from AC adapter or USB source. Operating range 4.35-16 V (abs max 18 V). Input current limited to 2 A.
5	BAT	bidirectional	Battery input and output. Connects to single-cell Li-Ion/Li-Polymer pack positive terminal. Regulates to 4.2 V during charge; sources system current in battery mode. Pins 5 and 6 must be tied together externally.
6	BAT	bidirectional	Battery input and output. Second BAT pin - tie to pin 5. Handles up to 3.5 A source / 4 A sink current.
7	ISET2	input	USB charge current set point. High = 500 mA fast charge, Low = 100 mA charge. Also selects half-charge current mode.
8	MODE	input	Power-source selection input. Low = USB mode current limit (defaults to USB charging); High = AC adapter mode (charges at ISET1 rate). VIL ≈ 1 V, VIH ≈ 1.024 V (small hysteresis, ~24 mV).
9	CE	input	Chip enable input (active high). Logic-level input; VIL ≤ 0.4 V, VIH ≥ 1.4 V. CE-holdoff time 3.3-6.2 ms.
10	ISET1	bidirectional	Charge current set point (RSET to VSS) and precharge/termination set point. VSET typ 2.5 V; KSET ≈ 425 for 100 mA-1.5 A range. Also used to monitor charge current.
11	VSS	power_in	Ground pin electrically connected to the exposed thermal pad. Must be tied to board ground; do not rely on the thermal pad alone as the primary ground return.
12	TS	bidirectional	Battery temperature sense input. Compared against V(LTF)=2.5 V and V(HTF)=0.5 V thresholds using a 100 µA current source. Connects to a battery-pack NTC thermistor.
13	DPPM	input	Dynamic power-path management set point (RDPPM to VSS). Programs the OUT regulation set point via a 100 µA current source; SF scale factor ≈ 1.150.
14	TMR	bidirectional	Timer program input (RTMR to VSS, 30-100 kΩ). Sets fast-charge timer via KTMR ≈ 0.36 s/Ω. Tie to VREF to disable the safety timer and charge termination.
15	OUT	power_out	Regulated system output. bq24070 variant regulates to 4.4 V. Output current up to 4 A absolute max. Pins 15/16/17 must be tied together on the PCB.
16	OUT	power_out	Regulated system output. Tie to pins 15 and 17. Carries system load current from AC/USB input or battery.
17	OUT	power_out	Regulated system output. Tie to pins 15 and 16.
18	PG	output	Power-good status output (open-drain, active low). Requires external pullup (≥1 kΩ). VOL ≤ 0.25 V at 5 mA.
19	GND	power_in	Ground input. Tie to pin 20 and system ground.
20	GND	power_in	Ground input. Tie to pin 19 and system ground.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	QFN-20-EP(3.7x4.7)
Category	PMIC
Pins	20

Ordering variants

BQ24070RHLR
BQ24070RHLRRHLT

CAD (KiCad official)

Symbol: BQ24070RHLR
Footprint: Package_DFN_QFN:QFN-20-1EP_4x5mm_P0.5mm_EP2.65x3.65mm
3D model: QFN-20-EP(3.7x4.7) (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (31 pp, sha256 b3910527d343126b, 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