BCM4339 Preliminary Data Sheet
3.3V LDO (LDO3P3)
Table 45: Core Buck Switching Regulator (CBUCK) Specifications (Cont.)
Specification
Notes
Min.
Typ.
Max. Units
µs
Input supply voltage
ramp-up time
0 to 4.3V
40
–
–
a. The maximum continuous voltage is 5.25V. Voltage transients up to 6.0V (for up to 10 seconds), cumulative
duration over the lifetime of the device, are allowed. Voltage transients 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 46: LDO3P3 Specifications
Specification
Notes
Min.
Typ.
Max. Units
5.25a
V
Input supply voltage, Vin
Min. = Vo + 0.2V = 3.5V dropout voltage
3.0
3.6
requirement must be met under
maximum load for performance
specifications.
Output current
–
0.001
–
–
450
–
mA
V
Nominal output voltage, Vo
Default = 3.3V
3.3
Dropout voltage
At max load.
–
–
–
–
–
200
+5
mV
%
Output voltage DC accuracy
Quiescent current
Line regulation
Includes line/load regulation.
No load
–5
–
100
3.5
µA
Vin from (Vo + 0.2V) to 4.8V, max load –
mV/V
Load regulation
PSRR
load from 1 mA to 450 mA
in ≥ Vo + 0.2V,
–
–
–
0.3
–
mV/mA
dB
V
20
Vo = 3.3V, Co = 4.7 µF,
Max. load, 100 Hz to 100 kHz
LDO turn-on time
Chip already powered up.
–
160
4.7
250
10
µs
1.0b
External output capacitor, Co
Ceramic, X5R, 0402,
(ESR: 5 mꢀ–240 mꢀ), ± 10%, 10V
µF
External input capacitor
For SR_VDDBATA5V pin (shared with –
Bandgap) Ceramic, X5R, 0402,
4.7
–
µF
(ESR: 30m-200 mꢀ), ± 10%, 10V.
Not needed if sharing VBAT capacitor
4.7 µF with SR_VDDBATP5V.
a. The maximum continuous voltage is 5.25V. Voltage transients up to 6.0V (for up to 10 seconds), cumulative
duration over the lifetime of the device, are allowed. Voltage transients 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®
November 17, 2014 • 4339-DS106-R
Page 152
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