MAX1857EUA47+ by Analog Devices

500mA, Low-Dropout, Ripple-Rejecting LDO in µMAX


The MAX1857 low-dropout linear regulator operates from a +2.5V to +5.5V supply and delivers a guaranteed 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 equipment such as personal digital assistants (PDAs), cellular 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 protection. The device is available in a miniature 8-pin µMAX package. For higher power applications, refer to the MAX1792 and MAX1793 data sheets.

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Prices starting from US$1.50

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231
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Features

Guaranteed 500mA Output Current
Low 120mV Dropout at 500mA
Up to ±1% Output Voltage Accuracy Preset at 4.75V Adjustable from 1.25V to 5.0V
Preset at 4.75V
Adjustable from 1.25V to 5.0V
Reset Output with 4.5ms Timeout Period
Low 135µA Ground Current
0.1µA Shutdown Current
Thermal Overload Protection
Output Current Limit
Tiny µMAX Package

Specifications

VIN (V) (min) 2.5
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 1.25
Adj. VOUT (V) (max) 5
Rated ILOAD (mA) 500
Preset VOUT (V) 4.75
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.12
ICC (µA) (max) 250
Output Voltage Noise (µV RMS) (typ) 115
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
POK/Reset Thresh. (V) (nom) Vout-14%
Watchdog No
Reverse Batt. Protect. No
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
BudgetaryPrice (See Notes) 1.2


MAX1857EUA47+ Power Management ICs - PMIC by Analog Devices

LDO FIXED 4.75V 0.5A UMAX-8

Status: Unknown
Series: 4.75V 500mA LDO Voltage Regulators
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Output Type Fixed
Input Voltage Min 2.5V
Input Voltage Max 5.5V
Fixed Output Voltage Nom. 4.75V
Adjustable Output Voltage Min -
Adjustable Output Voltage Max -
Output Current 500mA
Dropout Voltage Vdo 120mV
LDO Regulator Case Style µMAX
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range 4.75V 500mA LDO Voltage Regulators
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Output Voltage Nom. 4.75V

Alternative Descriptions

Ldo, Fixed, 4.75V, 0.5A, Umax-8 | Newark Electronics
LDO, FIXED, 4.75V, 0.5A, UMAX-8 | element14
500mA, Low-Dropout, Ripple-Rej | Analog Devices

Frequently Asked Questions

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Is the MAX1857EUA47+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Newark Electronics, element14, Farnell and Analog Devices have stock available or on a lead time for MAX1857EUA47+ .

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