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LD2985 Datasheet(PDF) 1 Page - Unisonic Technologies

Part No. LD2985
Description  VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE, WITH INHIBIT FUNCTION
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Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
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LD2985 Datasheet(HTML) 1 Page - Unisonic Technologies

 
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UTCLD2985
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R102-024,C
VERY LOW DROP AND LOW
NOISE VOLTAGE REGULATOR
LOW ESR CAP. COMPATIBLE,
WITH INHIBIT FUNCTION
DESCRIPTION
The UTC LD2985 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
1μA 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 30μVrms.
Typical application are 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 (2mA Typ. at
150mA LOAD AND 80μA at NO LOAD)
*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
*AVAILABLE IN ± 1% TOLLERANCE (at 25℃, A
VERSION)
*LOW OUTPUT NOISE VOLTAGE 30μVrms
SOT-25
1
2
3
4
5
1:VIN
2:GND
3:INHIBIT
4:Bypass
5:VOUT
PIN DESCRIPTION
PIN
NO.
PIN
NAME
FUNCTION
1
IN
Input Port
2
GND
Ground Pin
3
INHIBIT
Control switch ON/OFF.
Inhibit is not internally
pulled-up; it cannot be left
floating. Disable the device
when connected to GND or
to a positive voltage less
than 0.18V
4
Bypass
Bypass Pin: Capacitor to
be connected to GND in
order to improve the
thermal noise
performances.
5
OUT
Output Port


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