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Спецификация LD2985BM33R изготовлена «STMicroelectronics» и имеет функцию, называемую «Very low drop and low noise voltage regulator». |
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Детали детали
Номер произв | LD2985BM33R |
Описание | Very low drop and low noise voltage regulator |
Производители | STMicroelectronics |
логотип |
18 Pages
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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 mVrms
• Small package SOT23-5L
• Temperature range: - 40°C to 125 °C
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
Datasheet - production data
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
LD2985BM28R
2.5 V
2.8 V
LD2985BM30R
3.0 V
LD2985BM31R
3.1 V
LD2985BM33R
3.3 V
LD2985BM50R
5.0 V
November 2013
This is information on a product in full production.
DocID8189 Rev 13
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Contents
Contents
LD2985
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Application notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1 External capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2 Input capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.3 Output capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.4 Important . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.5 Inhibit input operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.6 Reverse current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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LD2985
1 Diagram
Figure 1. Schematic diagram
Diagram
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Номер в каталоге | Описание | Производители |
LD2985BM33R | Very low drop and low noise voltage regulator | STMicroelectronics |
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