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Dual PWM Step-Down Converter in a 2mm x
2mm Package for WCDMA PA and RF Power
_______________________________________________________________________________________ 7
10祍/div
OUT1 LOAD TRANSIENT RESPONSE
I
OUT
200mA/div
100mV/div
(AC-COUPLED)
MAX8896 toc16
V
PA
500mA
0mA
10祍/div
OUT1 REFIN TRANSIENT RESPONSE
V
REFIN
500mV/div
500mV/div
1A/div
MAX8896 toc17
V
PA
I
L1
0.72V
0.2V
1.8V
0.5V
2.5& LOAD
10祍/div
OUT1 REFIN TRANSIENT RESPONSE
WITH BYPASS EVENT
V
REFIN
1V/div
1V/div
1A/div
MAX8896 toc18
V
PA
I
L1
3.3V
0.6V
1.8V
0
30
20
10
40
50
60
70
80
90
100
0
50
100    150    200
OUT2 EFFICIENCY
vs. LOAD CURRENTo
LOAD CURRENT (mA)
V
CC
 = 4.2V
V
CC
 = 3.6V
V
CC
 = 3.2V
20祍/div
OUT1 LINE TRANSIENT RESPONSE
V
IN
500mV/div
10mV/div
(AC-COUPLED)
200mA/div
MAX8896 toc15
V
PA
I
L1
50mA LOAD
4.0V
3.5V
Typical Operating Characteristics (continued)
(V
CC
= V
IN1
= V
IN2
= 3.6V, V
REFIN
= 0.72V, circuit of Figure 3, T
A
= +25癈, unless otherwise noted.)
3.04
3.05
3.06
3.07
3.08
3.09
3.10
3.11
3.12
0
50
100    150    200
*OUT2 IN DROPOUT
OUT2 VOLTAGE
vs. LOAD CURRENT
LOAD CURRENT (mA)
V
CC
 = 3.6V
V
CC
 = 3.2V*
V
CC
 = 4.2V
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相关代理商/技术参数
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