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参数资料
| 型号： | MAX1857 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | 数字信号处理 |
| 英文描述： | Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA |
| 中文描述： | 500mA、具有纹波抑制的LDO，µMAX封装 |
| 文件页数： | 5/10页 |
| 文件大小： | 245K |
| 代理商： | MAX1857 |
M
500mA, Low-Dropout,
Ripple-Rejecting LDO in μMAX
_______________________________________________________________________________________
5
80
70
60
50
40
30
20
10
0
0.01
1
10
0.1
100
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
M
FREQUENCY (kHz)
P
1000
C
OUT
= 3.3
μ
F
I
OUT
= 50mA
LOAD-TRANSIENT RESPONSE
MAX1857 toc05
10
μ
s/div
4.80V
0
600mA
4.75V
4.70V
400mA
200mA
A: V
OUT
= 4.75V, 50mV/div
B: I
= 5mA TO 500mA, 200mA/div
V
IN
= 5.25V, C
IN
= 10
μ
F
SWITCHING POWER-SUPPLY
RIPPLE REJECTION
A
B
LOAD-TRANSIENT RESPONSE
NEAR DROPOUT
MAX1857 toc06
10
μ
s/div
0
4.80V
4.75V
4.70V
4.65V
400mA
200mA
A: V
OUT
= 4.75V, 50mV/div
B: I
= 5mA TO 500mA, 200mA/div
V
IN
= V
OUT
+ 100mV = 4.85V, C
IN
= 10
μ
F
A
B
MAX1857 toc07
2
μ
s/div
5.0V
4.75V
A: MAX1632: V
IN
= 9V, V
OUT
= 5.0V, 20mV/div
B: MAX1857: V
OUT
= 4.75V, I
OUT
= 500mA, 2mV/div
OUT
MAX1632
= IN
MAX1857
A
B
RST WAVEFORM
MAX1857 toc09
20ms/div
A: V
IN
= 0 TO 5.5V, 2V/div
B: V
OUT
= 4.75V, R
OUT
= 95
, 2V/div
C: V
RST
, 100k
TO OUT, 2V/div
A
B
0
0
0
C
Typical Operating Characteristics (continued)
(V
IN
= +5.25V, V
OUT
= 4.75V,
SHDN
= IN, SET = GND, C
IN
= 1μF, C
OUT
= 3.3μF, T
A
= +25
°
C, unless otherwise noted.)
SHUTDOWN WAVEFORM
MAX1857 toc08
40
μ
s/div
6V
2V
A: V
SHDN
= 0 TO 2V, 1V/div
B: V
OUT
= 4.75V, 2V/div
R
OUT
= 9.5
(500mA)
A
B
2V
1V
0
4V
0
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1858 | Dual 180∑ Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR |
| MAX1858EEG | Dual 180∑ Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR |
| MAX1858A-MAX1876A | Dual 180∑ Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR |
| MAX1858A | Dual 180?Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR |
| MAX1875A | Dual 180?Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1857EUA47 | 功能描述:低压差稳压器 - LDO 500mA Ripple-Rejecting RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1857EUA47+ | 功能描述:低压差稳压器 - LDO 500mA Ripple-Rejecting RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1857EUA47+T | 功能描述:低压差稳压器 - LDO 500mA Ripple-Rejecting RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1857EUA47-T | 功能描述:低压差稳压器 - LDO 500mA Ripple-Rejecting RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX1858AEEG | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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