User's Manual

4. Electrical Characteristics

4.1 Current Consumption Characteristics

With the use of advanced power-management technologies, the module can switch between different power

modes. For details on different power modes, please refer to Section RTC and Low-Power Management in ESP32-

S2 User Manual.

Table 7: Current Consumption Depending on RF Modes

Work mode Description Average Peak

Active (RF working)

802.11b, 20 MHz, 1 Mbps, @ 22.31dBm 190 mA 310 mA

802.11g, 20 MHz, 54 Mbps, @ 25.00dBm 145 mA 220 mA

802.11n, 20 MHz, MCS7, @ 24.23dBm 135 mA 200 mA

802.11n, 40 MHz, MCS7, @ 22.86 dBm 120 mA 160 mA

802.11b/g/n, 20 MHz 63 mA 63 mA

802.11n, 40 MHz 68 mA 68 mA

Note:

• The current consumption measurements are taken with a 3.3 V supply at 25 °C of ambient temperature at the RF

port. All transmitters’ measurements are based on a 50% duty cycle.

• The current consumption figures for in RX mode are for cases when the peripherals are disabled and the CPU idle.

Table 8: Current Consumption Depending on Work Modes

Work mode Description Current consumption (Typ)

Modem-sleep

The CPU is

powered on

240 MHz 22 mA

160 MHz 17 mA

Normal speed: 80 MHz 14 mA

Light-sleep — 550 µA

Deep-sleep

The ULP co-processor is powered on. 220 µA

ULP sensor-monitored pattern 7 µA @1% duty

RTC timer + RTC memory 10 µA

RTC timer only 5 µA

Power off CHIP_PU is set to low level, the chip is powered off. 0.5 µA

Note:

• The current consumption figures in Modem-sleep mode are for cases where the CPU is powered on and the cache

idle.

• When Wi-Fi is enabled, the chip switches between Active and Modem-sleep modes. Therefore, current consump-

tion changes accordingly.

• In Modem-sleep mode, the CPU frequency changes automatically. The frequency depends on the CPU load and

the peripherals used.

• During Deep-sleep, when the ULP co-processor is powered on, peripherals such as GPIO and I²C are able to

operate.

• The ”ULP sensor-monitored pattern” refers to the mode where the ULP coprocessor or the sensor works periodi-

cally. When touch sensors work with a duty cycle of 1%, the typical current consumption is 7 µA.

Espressif Systems

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ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5