ESP32 datasheet(42/64 Pages) ESPRESSIF

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5. Electrical Characteristics

5.1 Absolute Maximum Ratings

Stresses beyond the absolute maximum ratings listed in the table below may cause permanent damage to the

device. These are stress ratings only, and do not refer to the functional operation of the device that should follow

the recommended operating conditions.

Table 11: Absolute Maximum Ratings

Symbol

Parameter

Min

Max

Unit

VDDA, VDD3P3, VDD3P3_RTC,

VDD3P3_CPU, VDD_SDIO

Voltage applied to power supply pins per

power domain

–0.3

3.6

Ioutput *

Cumulative IO output current

1200

Tstore

Storage temperature

–40

150

°C

* The chip worked properly after a 24-hour test in ambient temperature at 25 °C, and the IOs in three domains (VDD3P3_RTC,

VDD3P3_CPU, VDD_SDIO) output high logic level to ground.

5.2 Recommended Operating Conditions

Table 12: Recommended Operating Conditions

Symbol

Parameter

Min

Typ

Max

Unit

VDDA, VDD3P3_RTC 1

VDD3P3, VDD_SDIO (3.3 V mode) 2

Voltage applied to power supply pins per

power domain

2.3

3.3

3.6

VDD3P3_CPU

Voltage applied to power supply pin

1.8

3.3

3.6

IV DD

Current delivered by external power supply

0.5

T 3

Operating temperature

–40

125

°C

1. When writing eFuse, VDD3P3_RTC should be at least 3.3 V.

• VDD_SDIO works as the power supply for the related IO, and also for an external device. Please refer to the Appendix

IO_MUX of this datasheet for more details.

• VDD_SDIO can be sourced internally by the ESP32 from the VDD3P3_RTC power domain:

– When VDD_SDIO operates at 3.3 V, it is driven directly by VDD3P3_RTC through a 6 Ω resistor, therefore, there

will be some voltage drop from VDD3P3_RTC.

– When VDD_SDIO operates at 1.8 V, it can be generated from ESP32’s internal LDO. The maximum current this

LDO can offer is 40 mA, and the output voltage range is 1.65 V

~ 2.0 V.

• VDD_SDIO can also be driven by an external power supply.

• Please refer to Power Scheme, section 2.3, for more information.

3. The operating temperature of ESP32-D2WD and ESP32-U4WDH ranges from –40 °C to 105 °C, due to the flash em-

bedded in them. The other chips in this series have no embedded flash, so their range of operating temperatures is –40

°C

~ 125 °C.

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