LD3985M18R - ST Microelectronics

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

LD3985M18R
Manufacturer

ST Microelectronics
ChipWorker Part#

CW8401900
Category

Voltage Regulator
Package

SOT-23-5
Description

LDO Regulator Pos 1.8V 0.55A 5Pin SOT-23 T/R
Documentation

Datasheet

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LD3985M18R Specifications

Attribute	Attribute Value

Part Number	LD3985M18R
Manufacturer	ST Microelectronics
ChipWorker Part#	CW8401900
Category	Voltage Regulator
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	5 Pin
Case/Package	SOT-23-5
Number of Outputs	1 Output
Input Voltage (DC)	6.00V (max)
Output Voltage	1.8 V
Output Current	150 mA
Supply Current	150µA ~ 250µA
Quiescent Current	0.17 mA
Input Voltage (Max)	6 V
Input Voltage (Min)	2.5 V
Output Voltage (Min)	1.8 V
Output Current (Max)	550 mA
Operating Temperature (Max)	125 ℃
Operating Temperature (Min)	-40 ℃
Accuracy	±3 %
Input Voltage	6V ~ 2.5V
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Size-Length	3 mm
Size-Width	1.75 mm
Size-Height	1.3 mm
Operating Temperature	-40℃ ~ 125℃
Product Lifecycle Status	Active
Packaging	Tape & Reel (TR)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product Description

Description
The LD3985xx provides up to 150 mA, from 2.5 V to 6 V input voltage. The ultra low drop-voltage, low quiescent current and low noise make it suitable for low power applications and in battery powered systems. Regulator ground current increases only slightly in dropout, further prolonging the battery life. Power supply rejection is better than 60 dB at low frequencies and starts to roll off at 10 kHz. High power supply rejection is maintained down to low input voltage levels common to battery operated circuits. Shutdown logic control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. The LD3985xx is designed to work with low ESR ceramic capacitors. Typical applications are in mobile phone and similar battery powered wireless systems.
Features
■ Input voltage from 2.5 V to 6 V
■ Stable with low ESR ceramic capacitors
■ Ultra low dropout voltage (60 mV typ. at 150 mA load, 0.4 mV typ. at 1 mA load)
■ Very low quiescent current (85 µA typ. at no load, 170 µA typ. at 150 mA load; max 1.5 µA in OFF mode)
■ Guaranteed output current up to 150 mA
■ Wide range of output voltage: 1.22 V; 1.8 V; 2.5 V; 2.6 V; 2.7 V; 2.8 V; 2.9 V; 3 V; 3.3 V; 4.7 V
■ Fast turn-on time: typ. 200 µs [CO = 1 µF, CBYP = 10 nF and IO = 1 mA]
■ Logic-controlled electronic shutdown
■ Internal current and thermal limit
■ Output low noise voltage 30 µVRMS over 10 Hz to 100 kHz
■ SVR of 60 dB at 1 kHz, 50 dB at 10 kHz
■ Temperature range: - 40 °C to 125 °C

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