BCM4330 Preliminary Data Sheet
LDO3p1
Table 39: Core Buck Regulator (CBUCK) Specifications
Specification
Notes
Minimum Typical Maximum Units
g
Start-up time from power down
–
–
–
1400
µs
a. The max continuous voltage is 4.8V. Voltages up to 5.5V for up to 10 seconds, cumulative duration, over the
lifetime of the device are allowed. Voltages as high as 5.0V for up to 250 seconds, cumulative duration, over
the lifetime of the device are allowed.
b. VBAT = 2.7 to 4.8V, inductor DCR <137.5 mΩ
c. Includes line/load regulation, VBAT = 2.7 to 4.8V, load 0 to 500 mA, inductor DCR <137.5 mΩ
d. Max ripple based on VBAT <4.3V, Vout = 1.5V, Fs = 3.2 MHz, 1.5 uH inductor L >1.05 uH, cap + board total–ESR
<10 mΩ, Cout > 1.9 uF
e. VBAT<4.3V, inductor DCR <137.5 mΩ, ACR <1Ω
f. Critical CBuck component–see Reference [1] on page 20 for details and required characteristics of external
PMU components.
g. Start-up time is measured with respect to the rising edge of BT_REG_ON, WL_REG_ON, or EXT_SMPS_REQ.
LDO3p1
Table 40: LDO3p1 Specifications
Specification
Notes
Minimum Typical
Maximum Units
a
Input supply voltage
Output current
Output voltage range
(default = 2.5V)
–
–
2.3
–
2.4
3.6
–
2.5
4.8
80
3.4
V
mA
V
Programmable,
100 mV steps
Includes line/load
regulation
b
Output voltage accuracy
–5
–
5
%
Drop-out voltage
Quiescent current
External output capacitor
At maximum load
No load
–
SR_VDDBAT2 pin, ceramic, –
X5R, 0402, ESR 30–200
mΩ, ±10%, 10V
–
–
–
–
8
2.2
1
200
–
–
mV
µA
µF
cd
c
External input capacitor
–
µF
Start-up time from power down
LDO turn-on time
–
–
–
–
–
1400
100
µs
µs
Chip already powered up
a. The max continuous voltage is 4.8V. Voltages up to 5.5V for up to 10 seconds, cumulative duration, over the
lifetime of the device are allowed. Voltages as high as 5.0V for up to 250 seconds, cumulative duration, over
the lifetime of the device are allowed.
b. VBAT = 2.7 to 4.8V for 2.5V VOUT.
c. See Reference [1] on page 20 for details and required characteristics of external PMU components.
d. Ceramic, X5R, 0402, ESR 30~200 mΩ, ±10%, 10V.
®
BROADCOM
BCM4330 Preliminary Data Sheet
April 28, 2011 • 4330-DS304-RI
Page 144
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