UNISONIC TECHNOLOGIES CO., LTD

LD1985

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 9

Copyright © 2020 Unisonic Technologies Co., Ltd

QW-R102-021.J

VERY LOW DROP AND LOW

NOISE VOLTAGE

REGULATOR LOW ESR CAP.

COMPATIBLE, WITH INHIBIT

FUNCTION



DESCRIPTION

The UTC LD1985 is a 150mA fixed output voltage regulator.

The ultra low drop voltage and the low quiescent current make

them particularly suitable for low noise, low power applications,

and in battery powered systems. In sleep mode quiescent current

is less than 1

μA when INHIBIT pin is pulled low. Shutdown Logic

Control Function is available on pin 3 (TTL compatible). 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.

An external capacitor, CBYP=10nF, connected between bypass

pin and GND reduce the noise to 30

μVrms.

Typical application is in cellular phone, palmtop laptop

computer, personal digital assistant (PDA), personal stereo,

camcorder and camera.



FEATURES

* Very Low Dropout Voltage (280mV at 150mA and 7mV at 1mA

Load)

* Very Low Quiescent Current

* Output Current up to 150mA

* Logic Controlled Electronic Shutdown

* Output Voltage of 1.5, 1.8, 2.5, 2.8, 2.85, 3, 3.1, 3.2, 3.3, 3.5,

3.6, 3.8, 4, 4.7, 5V

* Internal Current and Thermal Limit

* Low Output Noise Voltage 30

μVrms

SOT-25

1

3

5

2

4



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

LD1985L-xx-AF5-R

LD1985G-xx-AF5-R

SOT-25

Tape Reel

Note: xx: Output Voltage, refer to Marking Information.

(1) R: Tape Reel

(2) AF5: SOT-25

(3) xx: Refer to Marking Information

(4) G: Halogen Free and Lead Free, L: Lead Free

LD1985G-xx-AF5-R

(1)Packing Type

(2)Package Type

(3)Output Voltage Code

(4)Green Package