Datasheet

Table Of Contents
DS13105 Rev 4 115/135
STM32WLE5J8/JB/JC Electrical characteristics
127
5.3.22 Voltage reference buffer characteristics
Table 78. VREFBUF characteristics
(1)
Symbol Parameter Conditions Min Typ Max Unit
V
DDA
Analog supply
voltage
Normal mode
V
RS
= 0 2.4 - 3.6
V
V
RS
= 1 2.8 - 3.6
Degraded mode
(2)
V
RS
= 0 1.65 - 2.4
V
RS
= 1 1.65 - 2.8
V
REFBUF_
OUT
Voltage
reference output
Normal mode
V
RS
= 0 2.046
(3)
2.048 2.049
(3)
V
RS
= 1 2.498
(3)
2.5 2.502
(3)
Degraded mode
(2)
V
RS
= 0 V
DDA
- 150 mV - V
DDA
V
RS
= 1 V
DDA
- 150 mV - V
DDA
TRIM
Trim step
resolution
- - - ±0.05 ±0.1 %
CL Load capacitor - - 0.5 1 1.5 µF
esr
Equivalent
series resistor
of C
load
----2
I
load
Static load
current
----4mA
I
line_reg
Line regulation 2.8 V V
DDA
3.6 V
I
load
= 500 µA - 200 1000
ppm/
V
I
load
= 4 mA - 100 500
I
load_reg
Load regulation 500 A I
load
4 mA Normal mode - 50 500
ppm
/mA
T
coeff
Temperature
coefficient
-40 °C < T
J
< +105 °C - -
T
coeff _ vrefint
+ 50
ppm
/°C
0 °C < T
J
< +50 °C - -
T
coeff_vrefint
+ 50
PSRR
Power supply
rejection
DC 40 60 -
dB
100 kHz 25 40 -
t
START
Startup time
CL = 0.5 µF
(4)
- 300 350
µsCL = 1.1 µF
(4)
- 500 650
CL = 1.5 µF
(4)
- 650 800
I
INRUSH
Control of
maximum DC
current drive on
VREFBUF_OUT
during start-up
phase
(5)
---8-mA