User's Manual

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design Confidential / Released 68 / 94
6 Electrical, Reliability and
RadioCharacteristics
6.1. Absolute Maximum Ratings
Absolute maximum ratings for power supply and voltage on digital and analog pins of the module are
listed in the following table.
Table 30: Absolute Maximum Ratings
Parameter Min. Max. Unit
VBAT_RF/VBAT_BB -0.3 4.7 V
USB_VBUS -0.3 5.5 V
Peak Current of VBAT_BB 0 0.8 A
Peak Current of VBAT_RF 0 1.8 A
Voltage at Digital Pins -0.3 2.3 V
Voltage at ADC0 0 VBAT_BB V
Voltage at ADC1 0 VBAT_BB V
6.2. Power Supply Ratings
Table 31: Power Supply Ratings
Parameter Description Conditions Min. Typ. Max. Unit
VBAT VBAT_BB and Voltage must stay within the 3.3 3.8 4.3 V