Data Sheet

BMD-341 - Data sheet
UBX-19033643 - R03 Electrical specifications Page 15 of 36
3 Electrical specifications
⚠ Stressing the device above one or more of the ratings listed in the Absolute maximum rating
section may cause permanent damage. These are stress ratings only. Operating the module at
these or at any conditions other than those specified in the Operating conditions section of this
document should be avoided. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
☞ Operating condition ranges define those limits within which the functionality of the device is
guaranteed. Where application information is given, it is advisory only and does not form part of
the specification.
3.1 Absolute maximum ratings
Symbol
Description
Min
Max
Unit
V
CC_MAX
Voltage on VCC supply pin
-0.3
3.9
V
V
CCH_MAX
Voltage on VCCH supply pin
-0.3
5.8
V
V
BUS_MAX
Voltage on VBUS supply pin
-0.3
5.8
V
V
IO_MAX
Voltage on GPIO pins (V
CC
> 3.6V)
-0.3
3.9
V
V
IO_MAX
Voltage on GPIO pins (V
CC
≤ 3.6V)
-0.3
V
CC
+0.3 V
V
T
S
Storage Temperature Range
-40
125
°C
Table 5: Absolute maximum ratings
⚠ The product is not protected against overvoltage or reversed voltages. If necessary, voltage spikes
exceeding the power supply voltage specification, given in table above, must be limited to values
within the specified boundaries by using appropriate protection devices.
3.2 Operating conditions
☞ Unless otherwise specified, all operating condition specifications are at an ambient temperature
of 25 °C and a supply voltage of 3.3 V.
⚠ Operation beyond the specified operating conditions is not recommended and extended exposure
beyond them may affect device reliability.
Symbol
Parameter
Min
Typ.
Max
Unit
V
CC_IN
VCC operating supply voltage in
1.7
3.0
3.6
V
V
CC_START
VCC DCDC starting voltage
1.75
-
-
V
V
CCH_HV
VCCH operating supply voltage in
2.5
5.0
5.5
V
V
BUS_IN
VBUS operating supply voltage in
4.35
5.0
5.5
V
T
R_VCC
VCC Supply rise time (0 V to 1.7 V)
-
-
60
ms
T
R_VCCH
VCCH Supply rise time (0 V to 3.7 V)
-
-
100
ms
T
A
Operating Ambient Temperature Range
-40
25
85
°C
Table 6: Operating conditions
3.3 Power and DCDC configuration
The BMD-341 has two internal regulator stages that each contain an LDO and DCDC regulator. The
first regulator, REG0, is fed by the VCCH pin and can accept a source voltage of 2.5 V to 5.5 V. The
output of REG0 is connected to the VCC pin and the input of the second regulator stage REG1. REG1
supplies power to the module core and can accept an input source voltage of 1.7 V to 3.6 V. Depending
on how the VCC and VCCH pins are connected, the module will operate in one of two modes: