Reproduction forbidden without Fibocom Wireless Inc. written authorization - All Rights Reserved
FIBOCOM L610 Series Hardware Guide Page 29 of 59
Figure 3-3 Power limit
Note:
Clients are recommended to add a TVS (recommended model: SMBJ5.0A/ESD5651N) to the
VBAT input, so as to improve the anti-surge capability of the product.
3.2.2 1.8V Output
L610 modules output 1.8V voltage through the VDD_EXT for use of the internal digital circuits of the
modules. The voltage is the logic level voltage of the module and can be used to indicate that the module
is on or off, or for external low current (< 80mA) circuit. If it is not in use, keep it in floating status. The logic
level of VDD_EXT is defined as follows: