参数资料
型号: MAX1821EUB+T
厂商: Maxim Integrated Products
文件页数: 6/18页
文件大小: 0K
描述: IC REG BUCK WCDMA 10-UMAX
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
应用: 转换器,WCDMA 功率放大器应用
输入电压: 2.6 V ~ 5.5 V
输出数: 1
输出电压: 1.25 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-µMAX
包装: 带卷 (TR)
WCDMA Cellular Phone 600mA
Buck Regulators
Typical Operating Characteristics (continued)
(T A = +25°C, unless otherwise noted.)
100
90
MAX1821 EFFICIENCY vs. LOAD CURRENT
(V OUT = 3.3V)
100
90
MAX1821 EFFICIENCY vs. LOAD CURRENT
(V OUT = 2.5V)
100
90
MAX1821 EFFICIENCY vs. LOAD CURRENT
(V OUT = 1.5V)
80
70
V IN = 3.6V
V IN = 5.0V
80
70
V IN = 2.7V
V IN = 3.6V
80
70
60
50
40
30
V IN = 3.6V
V IN = 5.0V
60
50
40
30
V IN = 5.0V
V IN = 2.7V
V IN = 3.6V
V IN = 5.0V
60
50
40
30
V IN = 2.7V
V IN = 3.6V
V IN = 5.0V
20
20
20
10
SKIP = GND (DASHED LINE)
SKIP = BATT (SOLID LINE)
10
SKIP = GND (DASHED LINE)
SKIP = BATT (SOLID LINE)
10
SKIP = GND (DASHED LINE)
SKIP = BATT (SOLID LINE)
0
0
0
1
10
100
1000
1
10
100
1000
1
10
100
1000
140
120
100
80
60
40
LOAD CURRENT (mA)
DROPOUT VOLTAGE vs. LOAD CURRENT
9
8
7
6
5
4
3
LOAD CURRENT (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
220
200
180
160
140
120
100
80
LOAD CURRENT (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
20
V OUT = 3.4V
RL = 57m ?
2
1
V OUT = 1.5V
SKIP = BATT
60
40
V OUT = 1.5V
SKIP = GND
0
0
20
0
100
200
300
400
500
600
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
LOAD CURRENT (mA)
HEAVY-LOAD SWITCHING WAVEFORMS
(V IN = 3.8V, V OUT = 3.4V,
I LOAD = 600mA, SKIP = BATT)
MAX1820/21 toc10
SUPPLY VOLTAGE (V)
MEDIUM-LOAD SWITCHING WAVEFORMS
(V IN = 3.8V, V OUT = 1.8V,
I LOAD = 300mA, SKIP = BATT)
MAX1820/21 toc11
SUPPLY VOLTAGE (V)
LIGHT-LOAD PWM SWITCHING WAVEFORMS
(V IN = 3.8V, V OUT = 0.45V,
I LOAD = 30mA, SKIP = BATT)
MAX1820/21 toc12
A
A
B
A
B
B
C
400ns/div
A: V LX , 5V/div
B: INDUCTOR CURRENT, 500mA/div
C: V OUT (AC-COUPLED), 5mV/div
C
400ns/div
A: V LX , 5V/div
B: INDUCTOR CURRENT, 500mA/div
C: V OUT (AC-COUPLED), 5mV/div
C
400ns/div
A: V LX , 5V/div
B: INDUCTOR CURRENT, 100mA/div
C: V OUT (AC-COUPLED), 5mV/div
6
_______________________________________________________________________________________
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