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LD2985

ST Microelectronics
Part Number LD2985
Manufacturer ST Microelectronics
Description Very low drop and low noise voltage regulator
Published Apr 25, 2005
Detailed Description LD2985 Very low drop and low noise voltage regulator with inhibit function SOT23-5L Features • Very low dropout voltag...
Datasheet PDF File LD2985 PDF File

LD2985
LD2985

Overview
LD2985 Very low drop and low noise voltage regulator with inhibit function SOT23-5L Features • Very low dropout voltage (280 mV at 150 mA and 7 mV at 1 mA load) • Very low quiescent current (2 mA typ.
at 150 mA load and 80 µA at no load) • Output current up to 150 mA • Logic controlled electronic shutdown • Output voltage of 1.
8, 2.
5, 2.
8, 3, 3.
1, 3.
3, 5 V • Internal current and thermal limit • Low output noise voltage 30 µVrms • Small package SOT23-5L • Temperature range: - 40 °C to 125 °C Datasheet - production data Description The LD2985 is a 150 mA 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 = 10 nF, connected between bypass pin and GND reduces the noise to 30 µVrms.
Typical application are in cellular phone, palmtop laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.
Table 1.
Device summary Order codes Output voltages LD2985BM18R 1.
8 V LD2985BM25R 2.
5 V LD2985BM28R LD2985BM30R 2.
8 V 3.
0 V LD2985BM31R 3.
1 V LD2985BM33R 3.
3 V LD2985BM50R 5.
0 V August 2021 This is information on a product in full production.
DocID8189 Rev 16 1/18 www.
st.
com 18 Contents Contents LD2985 1 Diagram .
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3 2 Pin configuration .
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4 3 Maximum ratings .
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5 4 Electrical characteristi...


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