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Dual PWM Step-Down Converter in a 2mm x
2mm Package for WCDMA PA and RF Power
6  _______________________________________________________________________________________
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.)
0.5
1.5
1.0
2.5
2.0
3.5
3.0
4.0
0.2    0.6 0.8
0.4
1.0 1.2 1.4 1.6 1.8 2.0
OUT1 PA STEP-DOWN CONVERTER OUTPUT
VOLTAGE vs. REFIN VOLTAGE
REFIN VOLTAGE (V)
OUTPUT VOLTAGE ERROR
vs. LOAD CURRENT
-4
-1
-3
-2
1
0
3
2
4
0
200
100
400    600
300    500    700 800
LOAD CURRENT (mA)
V
OUT
 = 3.18V
V
OUT
 = 0.56V
OUT1 LIGHT-LOAD SWITCHING
WAVEFORMS
MAX8896 toc12
V
LX1
I
L1
V
PA
2V/div
200mA/div
20mV/div
(AC-COUPLED)
200ns/div
5mA LOAD
OUT1 HEAVY-LOAD SWITCHING
WAVEFORMS
I
LX1
200mA/div
20mV/div
(AC-COUPLED)
2V/div
MAX8896 toc13
V
PA
LX1
500mA LOAD
20祍/div
OUT1 STARTUP AND SHUTDOWN
V
PAEN
5V/div
1V/div
500mA/div
MAX8896 toc14
V
PA
I
L1
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相关代理商/技术参数
MAX8896EREE-T 制造商:Maxim Integrated Products 功能描述:
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