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| 型号： | MAX1857EUA47+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 4.75V/ADJ .5A 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 4.75V，1.25 V ~ 5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 管件 |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
500mA, Low-Dropout,
Ripple-Rejecting LDO in μMAX
Pin Description
PIN
1, 2
3
4
5
6
7, 8
NAME
IN
RST
SHDN
GND
SET
OUT
FUNCTION
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.
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.
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.
Ground
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.
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.
V IN = +2.5V TO +5.5V
IN
C IN
1 μ F
IN
MOSFET
DRIVER WITH
I LIM
THERMAL
SENSOR
OUT
V OUT = 1.25V TO 5.0V
ON
SHDN
OUT
C OUT
3.3 μ F
OFF
LOGIC SUPPLY
SHUTDOWN
LOGIC
ERROR
AMPLIFIER
V REF
1.25V
5k ?
R1
VOLTAGE (V OUT )
R RST
100k ?
MAX1857
TO
μ C
RST
DELAY
TIMER
86% V REF
100mV
SET
R2
GND
Figure 1. Functional Diagram
6
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相关代理商/技术参数 |
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| 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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