Datasheet

VCC
GND
GND
GND
VDD33
GND
ESP Module
Discharge Circuit CAP Added By User
Q1
R1
100K
D1SW1
1 2
R2
1K
+
C1
Bulk CAP
Figure 7: Discharge Circuit for VDD33 Rail
Note:
The discharge circuit can be applied in scenarios where ESP32 is powered on and off repeatedly by switching the
power rails, and there is a large capacitor on the VDD33 rail. For details, please refer to Section Power Scheme in
ESP32 Datasheet.
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
CHIP_PU
VBAT
GND
GND
Title
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A4
1 1Thursday, May 31, 2018
Title
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1 1Thursday, May 31, 2018
Title
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Document Number Re v
Date: Sheet o f
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<ResetCirciut>
A4
1 1Thursday, May 31, 2018
R1 0R
R2
100K
U1
Power Supply Supervisor
GND
1
VCC
3
RESET#
2
Figure 8: Reset Circuit
Note:
When battery is used as the power supply for ESP32 series of chips and modules, a supply voltage supervisor is recom-
mended to avoid boot failure due to low voltage. Users are recommended to pull CHIP_PU low if the power supply for
ESP32 is below 2.3 V.
Espressif Systems 24
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ESP32-WROOM-32E & ESP32-WROOM-32UE Datasheet V1.1