DIO5907x

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© 2026 Dioo Microcircuits Co., Ltd. Jiangsu

DIO5907x• Rev.1.6

- 4 -

Pin Descriptions

Name

I/O

Description

TS

I

External NTC Thermistor Input. Connect the TS input to the NTC thermistor in the

battery pack. TS monitors a 10 kΩ NTC thermistor. For applications that do not use the

TS function, connect a 10 kΩ fixed resistor from TS to VSS to maintain a valid voltage

level on TS.

BAT

I/O

Charger Power Stage Output and Battery Voltage Sense Input. Connect BAT to the

positive terminal of the battery. Bypass BAT to VSS with a 4.7 μF to 47 μF ceramic

capacitor.

/CE

I

Charge Enable Active-Low Input. Connect /CE to a high logic level to disable battery

charging. OUT is active and battery supplement mode is still available. Connect /CE to a

low logic level to enable the battery charger. /CE is internally pulled down with

approximately 270 kΩ. Do not leave /CE unconnected to ensure proper operation.

EN1

I

Input Current Limit Configuration Inputs. Use EN1 and EN2 control the maximum input

current and enable USB compliance. See Table 1 for the description of the operation

states. EN1 and EN2 are internally pulled down with approximately 270 kΩ. Do not leave

EN1 or EN2 unconnected to ensure proper operation.

EN2

I

/PGOOD

O

Open-drain Power Good Status Indication Output. /PGOOD pulls to VSS when a valid

input source is detected. /PGOOD is high-impedance when the input power is not within

specified limits. Connect /PGOOD to the desired logic voltage rail using a 1 kΩ to 100 kΩ

resistor, or use with an LED for visual indication.

VSS

–

Ground. Connect to the thermal pad and to the ground rail of the circuit.

/CHG

O

Open-Drain Charging Status Indication Output. /CHG pulls to VSS when the battery is

charging. /CHG is high impedance when charging is complete and when charger is

disabled. Connect /CHG to the desired logic voltage rail using a 1 kΩ to 100 kΩ resistor,

or use with an LED for visual indication.

OUT

O

System Supply Output. OUT provides a regulated output when the input is below the

OVP threshold and above the regulation voltage. When the input is out of the operation

range, OUT is connected to VBAT except when SYSOFF is high (DIO59075/76).

Connect OUT to the system load. Bypass OUT to VSS with a 4.7 μF to 47 μF ceramic

capacitor.

ILIM

I

Adjustable Current Limit Programming Input. Connect a 510 Ω to 8 kΩ resistor from ILIM

to VSS to program the maximum input current (EN2 = 1, EN1 = 0). The input current

includes the system load and the battery charge current. Leaving ILIM unconnected

disables all charging.

IN

I

Input Power Connection. Connect IN to the external DC supply (AC adapter or USB

port). The input operating range is 4.35 V to 6.4 V (DIO59073/73B/75/76/78). The input

can accept voltages up to 28 V without damage but operation is suspended. Connect

bypass capacitor 4.7 μF to 10 μF to VSS.