DIO60120

Version 1.3, Aug 2025

www.dioo.com

© 2025 Dioo Microcircuits Co., Ltd. Jiangsu

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9.2. Power-good (PG) indicator

The DIO60010/A has a built-in power good (PG) function. The PG pin is an open-drain output and connected to

an external pull-up resistor; it is also controlled by a comparator which the feedback signal FB is fed to. If FB is

above 95% of the internal reference voltage, the PG pin will be in high impedance and VPG will be held high.

Otherwise, when the device is disabled in UVLO or in thermal shutdown, PG is low.

9.3. Undervoltage lockout

Undervoltage lockout protects the IC from insufficient input voltages. The DIO60120 is disabled if the input

voltage falls below 2.15 V (typ). In this UVLO event, both the high-side and low-side power MOSFETs turn off.

9.4. Thermal shutdown

If the junction temperature of the device reaches the thermal shutdown limit of 150°C, the DIO60120 shuts down

both high-side and low-side power MOSFETs. When the junction temperature reduces to the required level

(130°C typ), the device initiates a normal power-up cycle with soft-start.

9.5. Switch current limit and short-circuit protection

The protection function prevents the device from drawing excessive current in case of externally-caused

overcurrent or short-circuit conditions. If the current limit threshold is reached, the device delivers its maximum

output current. Detecting this condition for 32 switching cycles, the device turns off the high-side MOSFET for

about 500 μs and then restarts again with a soft-start cycle. As long as the overload condition is present, the

device hiccups that way, limiting the output power.

9.6. Feedback resistor dividers R1 and R2

Choose R1 and R2 to program the proper output voltage. To minimize the power consumption under light loads,

choose large resistance values for both R1 and R2. For example, it is recommended that the resistance value of

R1 is 200 kΩ, then R2 can be calculated from Equation (1).

1

OUT

2

R

0.6V

-

V

0.6V

R





(1)

Figure 18. Feedback resistor dividers R1 and R2