BQ24075 and BQ24075T PowerPath battery chargers pinout

Single-cell linear chargers with a separate system output and battery disconnect control. Select the exact part to see its temperature-sensing network.

RGT VQFN-16

17 contacts Current package

Texas Instruments · 3 × 3 mm nominal RGT package with an exposed thermal pad.

A 4.2 V single-cell linear charger with a separate system output and battery disconnect control. The T suffix uses input-ratiometric voltage thresholds at TS.

RGT VQFN-16 pinout

Top view, with pin 1 on the upper left. The exposed thermal pad is underneath the body.
EP is the exposed center pad on the underside.

Selected pin details

5 · EN2

Input · Control

Input current-limit mode bit. High with EN1 low selects the resistor-programmed current limit.

Texas Instruments SLUS937C, Pin Configuration and Functions

Electrical limits · Link to this pin

All 17 pins

Pin	Signal	Direction	Function
1	TS Input	Input	Ratiometric temperature-voltage input. Use the divider network shown in Figure 18.
2	BAT Bidirectional	Bidirectional	Battery charge output and voltage sense. Join both BAT pins and bypass to VSS.
3	BAT Bidirectional	Bidirectional	Battery charge output and voltage sense. Join both BAT pins and bypass to VSS.
4	CE Input	Input	Active-low charge enable. High disables charging while retaining the input-to-system path.
5	EN2 Input	Input	Input current-limit mode bit. High with EN1 low selects the resistor-programmed current limit.
6	EN1 Input	Input	Input current-limit mode bit. High with EN2 low selects the nominal 500 mA USB mode.
7	PGOOD Output	Output	Open-drain output that pulls low for a valid input supply.
8	VSS Return	Return	Supply return. Connect this lead and the thermal pad to ground.
9	CHG Output	Output	Open-drain first-cycle charge status. A safety-timer fault makes it pulse.
10	OUT Output	Output	System rail. Join both OUT pins and bypass to VSS.
11	OUT Output	Output	System rail. Join both OUT pins and bypass to VSS.
12	ILIM Current-setting node	Current-setting node	External resistor to VSS sets the adapter-mode input current limit.
13	IN Supply	Supply	External DC input. Fit the input bypass close to this pin.
14	TMR Input	Input	Programs the charge safety timers. An open pin selects the default timing.
15	SYSOFF Input	Input	Drive high to disconnect the battery from the system rail and disable battery charging. Drive low for normal operation.
16	ISET Current-setting node	Current-setting node	External resistor to VSS sets the fast-charge current.
17	EP Thermal pad	Thermal pad	Solder the exposed pad to the board ground. Connect the VSS lead to the same ground.

Signal assignments

Power path

A valid adapter supplies the system output. The battery path can supplement the output or supply it when the adapter is removed.

Charge programming

Charge current, input limit, thermistor and timer settings govern the battery charging cycle.

Status outputs

Read the open-drain outputs with separate pull-up resistors.

Electrical limits

Parameter	Limit	Conditions and source
Input operating voltage4.35–6.4 V	4.35–6.4 V	Recommended operating range. Absolute input withstand and overvoltage shutdown are separate. Texas Instruments SLUS937C, Recommended Operating Conditions
Battery regulation4.2 V nominal	4.2 V nominal	Single-cell charging. Texas Instruments SLUS937C, Electrical Characteristics
System output regulation5.5 V nominal	5.5 V nominal	When IN has enough voltage headroom and input current. The battery-only rail follows BAT less the path drop. Texas Instruments SLUS937C, Electrical Characteristics
Fast-charge current range300 mA–1.5 A	300 mA–1.5 A	The input-current limit, system load and temperature may reduce actual current. Texas Instruments SLUS937C, Electrical Characteristics

Models and documents

BQ24075 and BQ24075T share the RGT VQFN-16 contact arrangement. Select the exact model before using the TS connection example. The initial view shows BQ24075.

BQ24075: A 4.2 V single-cell linear charger with a separate system output and battery disconnect control. This version biases a 10 kΩ negative-temperature-coefficient (NTC) thermistor directly from TS.
BQ24075RGTR: RGT package, 3000-unit tape and reel.
BQ24075RGTR.A: RGT package, 3000-unit tape and reel.
BQ24075RGTR.B: RGT package, 3000-unit tape and reel.
BQ24075RGTRG4: RGT package, 3000-unit tape and reel.
BQ24075RGTRG4.A: RGT package, 3000-unit tape and reel.
BQ24075RGTRG4.B: RGT package, 3000-unit tape and reel.
BQ24075RGTT: RGT package, 250-unit tape and reel.
BQ24075RGTT.A: RGT package, 250-unit tape and reel.
BQ24075RGTT.B: RGT package, 250-unit tape and reel.
BQ24075T: A 4.2 V single-cell linear charger with a separate system output and battery disconnect control. The T suffix uses input-ratiometric voltage thresholds at TS.
BQ24075TRGTR: RGT package, 3000-unit tape and reel.
BQ24075TRGTR.A: RGT package, 3000-unit tape and reel.
BQ24075TRGTR.B: RGT package, 3000-unit tape and reel.
BQ24075TRGTT: RGT package, 250-unit tape and reel.
BQ24075TRGTT.A: RGT package, 250-unit tape and reel.
BQ24075TRGTT.B: RGT package, 250-unit tape and reel.

Texas Instruments SLUS937C· Device pin functions, input and charge regulation, power-path behavior and temperature-sense application circuit.
Source register· Document revisions, applicable order codes, consulted sections and available file checksums.