BCM4390DKWBGT Datasheet, PDF (66/78 Pages) Cypress Semiconductor – WICED™ Wi-Fi IEEE 802.11 b/g/n SoC with Embedded Application Processor

BCM4390 Advance Data Sheet
3.3V LDO (LDO3P3)
Table 19: Core Buck Switching Regulator (CBUCK) Specifications (Cont.)
Specification
Notes
Min Typ Max Units
Input supply voltage ramp-up 0 to 4.3V
time
40 –
–
μs
a. The maximum continuous voltage is 5.25V. Voltages up to 6.0V for up to 10 seconds, cumulative duration, over
the lifetime of the device are allowed. Voltages as high as 5.5V for up to 250 seconds, cumulative duration,
over the lifetime of the device are allowed.
b. Minimum capacitor value refers to the residual capacitor value after taking into account the part-to-part
tolerance, DC-bias, temperature, and aging.
c. Total capacitance includes those connected at the far end of the active load.
3.3V LDO (LDO3P3)
Table 20: LDO3P3 Specifications
Specification
Notes
Min Typ Max Units
Input supply voltage, V_in
Output current
Nominal output voltage, V_o
Dropout voltage
Min = V_o + 0.2V = 3.5V dropout voltage 3.0 3.6
requirement must be met under
maximum load for performance
specifications.
–
0.001 –
Default = 3.3V
–
3.3
At max load.
–
–
5.25^{a V}
450 mA
–
V
200 mV
Output voltage DC accuracy
Quiescent current
Includes line/load regulation.
No load
–5 –
–
–
+5 %
100 μA
Line regulation
Load regulation
PSRR
V_in from (V_o + 0.2V) to 4.8V, max load –
–
load from 1 mA to 450 mA
–
–
V_in ≥ V_o + 0.2V,
V_o = 3.3V, C_o = 4.7 μF,
Max load, 100 Hz to 100 kHz
20 –
3.5 mV/V
0.3 mV/mA
–
dB
LDO turn-on time
External output capacitor, C_o
External input capacitor
Chip already powered up.
–
160 250 μs
Ceramic, X5R, 0402,
(ESR: 5 mΩ–240 mΩ), ± 10%, 10V
1.0^{b 4.7 10 μF}
For SR_VDDBATA5V pin (shared with –
4.7 –
μF
Bandgap) Ceramic, X5R, 0402,
(ESR: 30m–200 mΩ), ± 10%, 10V.
Not needed if sharing VBAT capacitor
4.7 μF with SR_VDDBATP5V.
a. The maximum continuous voltage is 5.25V. Voltages up to 6.0V for up to 10 seconds, cumulative duration,
over the lifetime of the device are allowed. Voltages as high as 5.5V for up to 250 seconds, cumulative
duration, over the lifetime of the device are allowed.
b. Minimum capacitor value refers to the residual capacitor value after taking into account the part-to-part
tolerance, DC-bias, temperature, and aging.
BROADCOM ®
February 5, 2014 • 4390-DS103-R
WICED Wi-Fi IEEE 802.11 SoC w/Embedded App Processor
Page 65
BROADCOM CONFIDENTIAL