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LD2979 Datasheet

VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT

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LD2979
® SERIES
VERY LOW DROP
VOLTAGE REGULATORS WITH INHIBIT
s VERY LOW DROPOUT VOLTAGE
(0.2V TYP. AT 50mA LOAD)
s VERY LOW QUIESCENT CURRENT
(TYP. 500µA AT50mA LOAD)
s OUTPUT CURRENT UP TO 50 mA
s LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
s OUTPUT VOLTAGES OF 2.85; 3.0; 3.2; 3.3;
3.8; 5.0V
s INTERNAL CURRENT AND THERMAL LIMIT
s SUPPLY VOLTAGE REJECTION: 63dB (TYP)
s ONLY 1µF FOR STABILITY
s SELECTION AT 25 oC
s TEMPERATURE RANGE: -25 TO 125 oC
s PACKAGE AVAILABLE:SOT23-5L AND TO-92
SOT23-5L
DESCRIPTION
The LD2979 series are very Low Drop regulators
available in SOT23-5L and TO-92.
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.
Shutdown Logic Control function is available on
five pin version (TTL compatible). This means
TO-92
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.
SCHEMATIC DIAGRAM
April 2000
1/9


STMicroelectronics Electronic Components Datasheet

LD2979 Datasheet

VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT

No Preview Available !

LD2979
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
VIN DC Input Voltage
VINH DC Inhibit Input Voltage
Io Output Current
Ptot Power Dissipation
Tstg Storage Temperature Range
Top Operating Junction Temperature Range
CONNECTION DIAGRAM (top view)
Value
16
VI N
Internally limited
Internally limited
- 40 to 150
- 25 to 125
Unit
V
V
mA
mW
oC
oC
BOTTOM
VIEW
SOT23-5L
TO-92
SYMBOL
NAME AND FUNCTION
PIN NUMBER
SO T23-5L
T O-92
VIN
GND
Input Voltage
Ground
1
2
3
2
INHIBIT
Control Switch ON/OFF (*)
3
-
NC
Not to be connected
4
-
VOUT
Output Voltage
5
1
(*) Only for the version in SOT23-5L package: Inhibit pin is not internally pulled-up then it must not be left floating. Connect to a positive
voltage higher than 2V to able the device.
ORDERING NUMBERS
SOT23-5L
LD2979M28
LD2979M30
LD2979M32
LD2979M33
LD2979M38
LD2979M50
LD2979Z28
LD2979Z30
LD2979Z32
LD2979Z33
LD2979Z38
LD2979Z50
TO-92
Output Voltage
2.85 V
3.0 V
3.2 V
3.3 V
3.8 V
5.0 V
2/9


Part Number LD2979
Description VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
Maker ST Microelectronics
Total Page 9 Pages
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