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| 型号： | MAX1857EUA47+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/10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) |
19-1812; Rev 0; 1/01
500mA, Low-Dropout,
Ripple-Rejecting LDO in μMAX
General Description
The MAX1857 low-dropout linear regulator operates
from a +2.5V to +5.5V supply and delivers a guaran-
teed 500mA load current with low 120mV dropout. The
high-accuracy (±1%) output voltage is preset at an
internally trimmed 4.75V or can be adjusted from 1.25V
to 5.0V with an external resistive divider.
An internal PMOS pass transistor allows the low 135μA
supply current to remain independent of load, making
this device ideal for portable battery-operated equip-
ment such as personal digital assistants (PDAs), cellu-
lar phones, cordless phones, base stations, and
notebook computers.
Other features include an active-low open-drain reset
output with a 4.5ms timeout period that indicates when
the output is out of regulation, a 0.1μA shutdown mode,
short-circuit protection, and thermal shutdown protec-
tion. The device is available in a miniature 8-pin μMAX
package. For higher power applications, refer to the
MAX1792 and MAX1793 data sheets.
________________________Applications
Features
o Guaranteed 500mA Output Current
o Low 120mV Dropout at 500mA
o Up to ±1% Output Voltage Accuracy
Preset at 4.75V
Adjustable from 1.25V to 5.0V
o Reset Output with 4.5ms Timeout Period
o Low 135μA Ground Current
o 0.1μA Shutdown Current
o Thermal Overload Protection
o Output Current Limit
o Tiny μMAX Package
Ordering Information
Notebook Computers
Cellular and Cordless Telephones
PART*
MAX1857EUA47
TEMP. RANGE
-40 ° C to +85 ° C
PIN-PACKAGE
8 μ MAX
PDAs
Palmtop Computers
Base Stations
USB Hubs
Docking Stations
Typical Operating Circuit
*Contact factory for other preset output voltages.
Pin Configuration
V IN = +5V
IN
NC
OUT
V OUT = 4.75V
TOP VIEW
C IN
1 μ F
IN
OUT
C OUT
3.3 μ F
IN 1
8
OUT
ON
OFF
SHDN
MAX1857
RST
R RST
100k
TO
μ C
IN 2
RST 3
SHDN 4
MAX1857
7
6
5
OUT
SET
GND
SET
GND
μ MAX
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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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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