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Dual PWM Step-Down Converter in a 2mm x
2mm Package for WCDMA PA and RF Power
4  _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= V
IN1
= V
IN2
= V
PAEN
= V
RFEN1
= V
RFEN2
= 3.6V, V
REFIN
= 0.72V, T
A
= -40癈 to +85癈, typical values are at T
A
= +25癈,
unless otherwise noted.) (Note 2)
PARAMETER
CONDITIONS
MIN   TYP   MAX  UNITS
LDO
Output Voltage, V
LDO
V
OUT2
 = 3.1V, I
LDO
 = 1mA to 200mA
2.744  2.800
2.856   V
Current Limit
V
OUT2
 = 3.1V, V
LDO
 = 0V
250   420   750   mA
Dropout Voltage
V
OUT2
 = 3.1V, I
LDO
 = 100mA
70
mV
Line Regulation
V
OUT2
 stepped from 3.5V to 5.5V, I
LDO
 = 100mA
2.4
mV
Load Regulation
V
OUT2
 = 3.1V, I
LDO
 stepped from 50礎 to 200mA
25
mV
Power-Supply Rejection
V
LDO
/V
OUT2
V
OUT2
 = 3.1V, 10Hz to 10kHz,
C
LDO
 = 1礔, I
LDO
= 100mA
65
dB
Output Noise
100Hz to 100kHz,
C
LDO
 = 1礔, I
LDO
 = 100mA
16
礦
RMS
Minimum Output Capacitance for
Stable Operation
0 < I
LDO
 < 200mA
1
礔
Output Leakage Current
V
OUT2
 = 3.1V, V
RFEN1
 = V
RFEN2
 = 0V
25
nA
Power-Up Delay
From V
RFEN1
 or V
RFEN2
 rising to V
LDO
 rising
50
祍
Note 2:All devices are 100% production tested at T
A
= +25癈. Limits over the operating temperature range are guaranteed by
design.
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