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
2.7
2.24
–
–
2.8
–
5.5
V
Input supply voltage
–
3.36 MHz
PWM mode switching frequency
PWM output current
–
300
1.75
5
mA
V
–
1.0
–5
–
1.45
–
Output voltage range
Programmable, 25 mV steps
%
Output voltage accuracy
PWM ripple voltage, static load
–
–
7
20 mVpp
–
70
100
mV
PWM ripple voltage, dynamic load 200 mA, 1 μs rise/fall current
step
–
80
70
–
–
90
80
60
75
30
20
1
80 mVpp
Burst mode ripple voltage, static
PWM mode efficiency
<30 mA load current
200 mA load current
10 mA load current
200 μA load current
5 mA load current
Burst mode
–
%
%
%
–
–
Burst mode efficiency
Low Power mode efficiency
–
–
–
–
μA
Quiescent current
–
–
Low-Power mode
Power-down
–
–
–
600
4.7
3.3
–
mA
μF
Output current limit
Output capacitor
Output inductor
–
3.76
2.64
5.64
3.96
Must be X5R, rated at >6.3V
μH
See reference schematics and
application notes for
recommended inductor types.
–
–
500
–
1000
200
μs
μs
Start-up time from power-down
Settling time: LPOM to burst
–
Ensure load current < 5 mA
during mode change.
–
–
400
μs
Settling time: Burst To PWM mode Ensure load current < 30 mA
during mode change.
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April 2, 2014 • 4319-DS05-R
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