LD2979
Very low drop voltage regulators with inhibit
Datasheet
-
production data
Description
The LD2979 is a very low drop regulator available
in SOT23-5L.
The very low drop-voltage and the very low
quiescent current make them particularly suitable
for low noise, low power applications and in
battery powered systems.
SOT23-5L
Features
•
Very low dropout voltage (0.2 V typ. at 50 mA
load)
•
Very low quiescent current (typ. 500 µA at 50
mA load)
•
Output current up to 50 mA
•
Logic-controlled electronic shutdown
•
Output voltages of 3.0 and 3.3 V
•
Internal current and thermal limit
•
Supply voltage rejection: 63 dB (typ)
•
Only 1 µF for stability
•
Temperature range: -25 °C to 125 °C
•
Package available: SOT23-5L
Shutdown logic control function is available on
five pin version (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.
Table 1. Device summary
Order codes
LD2979M30TR
LD2979M33TR
Output voltages
3.0 V
3.3 V
November 2013
This is information on a product in full production.
DocID5721 Rev 15
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Contents
LD2979
Contents
1
2
3
4
5
6
7
8
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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LD2979
Maximum ratings
3
Maximum ratings
Table 3. Absolute maximum ratings
Symbol
V
I
V
INH
I
O
P
D
T
STG
T
OP
DC input voltage
DC inhibit input voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
Parameter
Value
16
V
IN
Internally limited
Internally limited
-40 to 150
-25 to 125
°C
°C
Unit
V
V
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
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PCB Design
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