Refer to the PDF data sheet for device specific package drawings
The BQ25190 is a highly integrated battery management unit that integrates the most commonly used functions for wearable devices: a linear charger with power path, one step-down switching converter (Buck), one buck-boost switching converter (Buck-boost), two LDOs (LDO1 and LDO2), manual reset with timer (MR) , multi-channel analog-to-digital converter (ADC), as well as four multifunctional general-purpose input/outputs (GPIO).
PART NUMBER | PACKAGE(1) | BODY SIZE (NOM) |
---|---|---|
BQ25190 | YBG (WCSP 30) | 2.25mm x 2.75mm |
The integrated charger supports charge current from 5mA to 1A that enables quick and accurate charging while providing a regulated voltage to the system. The regulated system voltage (VSYS) can be configured through I2C based on the recommended operating conditions of the downstream system loads. Other operation parameters such as the input current limit, charge current, Buck converters' output voltages, Buck-boost converters' output voltage, and LDOs' output voltages are also programmable through the I2C interface.
The BQ25190 features low quiescent current during operation and shutdown, which enables longer battery life.
PIN | I/O(1) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
IN | E5 | P | DC input power supply. IN is connected to the external DC supply. Bypass IN to GND with at least 1 μF of capacitance using a ceramic capacitor. |
SYS | A5, D5, F5 | P | Regulated system output. Connect ceramic capatitors respectivelly as suggested in Section 8.2.2.2 as close to the SYS and GND pins as possible. |
BAT | C5 | P | Battery Connection. Connect to the positive terminal of the battery. Bypass BAT to GND with at least 1 μF of ceramic capacitance |
GND | A1, B5 | G | Ground connection. Connect to the ground plane of the circuit |
CE | D2 | I | Charge enable. Drive CE low or leave floating to enable charging when VIN is valid. Drive CE high to disable charge. CE has no effect when VIN is not present. |
SCL | D1 | I | I2C interface clock. Connect SCL to the logic rail through a 10 kΩ resistor. |
SDA | E1 | I/O | I2C interface data. Connect SDA to the logic rail through a 10 kΩ resistor. |
INT | B3 | O | INT is an open-drain output that signals fault interrupts. When a fault occurs, a 128 μs active low pulse is sent out as an interrupt for the host. INT is enabled/disabled using the MASK_INT bit in the control register. Can be pulled up to 1- 20 kΩ resistor. Typical pull up voltage = 1.8V. |
VPU |
C3 |
I | GPIO push-pull mode Pull-up Voltage Pin. Connect VPU to the voltage to be used for the GPIO pins' push-pull mode functions. The pin can be left floating if GPIO pins' push-pull mode functions are not used. |
GPIO1 | D3 | I/O | General-purpose input/output pin 1 |
GPIO2 | D4 | I/O | General-purpose input/output pin 2 |
GPIO3 | E3 | I/O | General-purpose input/output pin 3 |
GPIO4 | E4 | I/O | General-purpose input/output pin 4 |
BKOUT | A2 | I | Output voltage sense pin for the internal feedback divider network of Buck. It also connects the output discharge circuit. Connect this pin to the Buck output capacitor with a short trace. |
BBOUT | F1 | P | Output voltage sense pin for the internal feedback divider network of Buck-boost. It also connects the output discharge circuit. Connect this pin to the Buck-boost output capacitor with a short trace. |
BKSW | A4 | P | Buck switch node. Connect the power inductor to this pin. |
BBSW1 | F4 | P | Buck-boost switch node. Connect the power inductor to this pin. |
BBSW2 | F2 | P |
Buck-boost switch node. Connect the power inductor to this pin. |
BKGND | A3 | G | Power ground of Buck. Connect this pin to the ground plane. |
BBGND | F3 | G | Power ground of Buck-boost. Connect this pin to the ground plane. |
MR | E2 | I | Manual reset input. MR is a push-button input that must be held low for greater than tRESET to assert the reset output. If MR is pressed for a shorter period, there are two programmable timer events, tWAKE1 and tWAKE2, that trigger an interrupt to the host. The MR input can also be used to bring the device out of Ship mode. |
TS | B4 | I | Battery pack NTC monitor. Connect TS to a 10-kΩ NTC thermistor in parallel to a 10-kΩ resistor. If TS function is not to be used, connect a 5-kΩ resistor from TS to ground. |
LSLDO1 | B1 | P | Output pin of LDO1. Connect the output capacitor from this pin to the ground plain. |
LSLDO2 | C1 | P | Output pin of LDO2. Connect the output capacitor from this pin to the ground plain. |
ADCIN | C4 | I | Input channel to the ADC. |
VINLS1 | B2 | P | Input pin of LDO1. Connect the intput capacitor from this pin to the ground plain. |
VINLS2 | C2 | P | Input pin of LDO2. Connect the intput capacitor from this pin to the ground plain. |