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参数资料
| 型号： | MAX1857EUA47 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 500mA, Low-Dropout, Ripple-Rejecting LDO in MAX |
| 中文描述： | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.175 V DROPOUT, PDSO8 |
| 封装： | MICRO MAX PACKAGE-8 |
| 文件页数： | 6/10页 |
| 文件大小： | 245K |
| 代理商： | MAX1857EUA47 |
500mA, Low-Dropout,
Ripple-Rejecting LDO in μMAX
6
_______________________________________________________________________________________
M
Pin Description
PIN
NAME
FUNCTION
1, 2
IN
Regulator Input. Supply voltage can range from +2.5V to +5.5V. Bypass with a 1μF capacitor or greater to
GND (see
Capacitor Selection and Regulator Stability
). Connect both input pins together externally.
3
RST
Open-Drain, Active-Low Reset Output.
RST
remains low while the output voltage (V
OUT
) is below the reset
threshold and for at least 4ms after V
OUT
rises above the reset threshold. Connect a 100k
pullup resistor
to OUT.
4
SHDN
Active-Low Shutdown Input. A logic low reduces supply current to 0.1μA. In shutdown, the
RST
output is
low and OUT is pulled low through an internal 5k
resistor. Connect to IN for normal operation.
5
GND
Ground
6
SET
Voltage-Setting Input. Connect to GND for preset output. Connect a resistive voltage-divider from OUT to
set the output voltage between 1.25V and 5.0V.
7, 8
OUT
Regulator Output. Sources up to 500mA. Bypass with a 3.3μF low-ESR capacitor to GND. Use a 4.7μF
capacitor for output voltages below 2V. Connect both output pins together.
100mV
SHDN
IN
IN
RST
ON
OFF
C
IN
1
μ
F
V
IN
= +2.5V TO +5.5V
OUT
OUT
V
OUT
= 1.25V TO 5.0V
C
OUT
3.3
μ
F
THERMAL
SENSOR
SET
MOSFET
DRIVER WITH
ILIM
DELAY
TIMER
SHUTDOWN
LOGIC
V
1.25V
ERROR
AMPLIFIER
GND
R1
R2
R
RST
100k
LOGIC SUPPLY
VOLTAGE (V
OUT
)
86% V
REF
TO
μ
C
5k
MAX1857
Figure 1. Functional Diagram
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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+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 |
| MAX1858AEEG+ | 功能描述:电压模式 PWM 控制器 Dual 180 Out Buck Controllers RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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