BCM4390DKWBGT Datasheet, PDF (65/78 Pages) Cypress Semiconductor – WICED™ Wi-Fi IEEE 802.11 b/g/n SoC with Embedded Application Processor

BCM4390 Advance Data Sheet
Internal Regulator Electrical Specifications
Section 12: Internal Regulator Electrical
Specifications
Note: Values in this data sheet are design goals and are subject to change based on the results of
device characterization.
Functional operation is not guaranteed outside of the specification limits provided in this section.
Core Buck Switching Regulator
Table 19: Core Buck Switching Regulator (CBUCK) Specifications
Specification
Notes
Min
Input supply voltage (DC)
DC voltage range inclusive of disturbances. 3.0
PWM mode switching frequency CCM, Load > 100 mA VBAT = 3.6V
2.8
PWM output current
–
–
Output current limit
–
–
Output voltage range
Programmable, 30 mV steps
1.2
Default = 1.35V
PWM output voltage
DC accuracy
Includes load and line regulation.
–4
Forced PWM mode
PWM ripple voltage, static
Measure with 20 MHz bandwidth limit. –
Static Load. Max Ripple based on
VBAT = 3.6V, Vout = 1.35V,
Fsw = 4 MHz, 2.2 μH inductor L > 1.05 μH,
Cap + Board total-ESR < 20 mΩ,
C_out > 1.9 μF, ESL<200pH
PWM mode peak efficiency Peak Efficiency at 200 mA load
78
PFM mode efficiency
10 mA load current
70
Start-up time from
power down
VIO already ON and steady.
–
Time from REG_ON rising edge to CLDO
reaching 1.2V
External inductor
0806 size, ± 30%, 0.11 ± 25% Ohms
–
External output capacitor
Ceramic, X5R, 0402,
2.0^b
ESR <30 mΩ at 4 MHz, ± 20%, 6.3V
External input capacitor
For SR_VDDBATP5V pin,
ceramic, X5R, 0603,
0.67^b
ESR < 30 mΩ at 4 MHz, ± 20%, 6.3V, 4.7 µF
Typ
3.6
4
–
1400
1.35
–
7
86
81
–
2.2
4.7
4.7
Max
5.25^a
5.2
600
1.5
4
20
–
–
850
–
10^c
–
Units
V
MHz
mA
mA
V
%
mVpp
%
%
μs
μH
μF
μF
BROADCOM ®
February 5, 2014 • 4390-DS103-R
WICED Wi-Fi IEEE 802.11 SoC w/Embedded App Processor
Page 64
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