BCM4319XKUBGT Datasheet, PDF (69/84 Pages) Cypress Semiconductor – Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/ Radio with Integrated SDIO and USB Interfaces

BCM4319 Preliminary Data Sheet
Internal Regulator Electrical Specifications
Section 12: Internal Regulator Electrical
Specifications
Caution! Functional operation outside the limits specified in this section is not guaranteed. In addition,
operating the device under such conditions for an extended period of time can adversely affect the
long-term reliability of the device.
Core Buck Regulator (CBuck)
Table 21: Core Buck Regulator (CBUCK)
Specification
Notes
Minimum Typical Maximum Units
Input supply voltage
–
2.7
–
5.5
V
PWM mode switching frequency –
2.24
2.8
3.36 MHz
PWM output current
–
–
–
300 mA
Output voltage range
Programmable, 25 mV steps
1.0
1.45
1.75
V
Output voltage accuracy
–
–5
–
5%
PWM ripple voltage, static load –
–
7
20 mVpp
PWM ripple voltage, dynamic load 200 mA, 1 μs rise/fall current
step
–
70
100 mV
Burst mode ripple voltage, static <30 mA load current
–
–
80 mVpp
PWM mode efficiency
200 mA load current
80
90
–%
Burst mode efficiency
Low Power mode efficiency
Quiescent current
10 mA load current
200 μA load current
5 mA load current
Burst mode
70
80
–
60
–
75
–
30
–%
–%
–
– μA
Low-Power mode
–
20
–
Power-down
–
1
–
Output current limit
–
–
600
– mA
Output capacitor
Must be X5R, rated at >6.3V
3.76
4.7
5.64 μF
Output inductor
Start-up time from power-down
See reference schematics and
application notes for
recommended inductor types.
–
2.64
3.3
3.96 μH
–
500
1000 μs
Settling time: LPOM to burst
Ensure load current < 5 mA
during mode change.
Settling time: Burst To PWM mode Ensure load current < 30 mA
during mode change.
–
–
200 μs
–
–
400 μs
Broadcom^®
April 2, 2014 • 4319-DS05-R
Single-Chip IEEE 802.11™ a/b/g/n MAC/Baseband/Radio
Page 68