LD2980
SERIES
ULTRA LOW DROP VOLTAGE REGULATORS WITH INHIBIT
LOW ESR OUTPUT CAPACITORS COMPATIBLE
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STABLE WITH LOW ESR CERAMIC
CAPACITORS
ULTRA LOW DROPOUT VOLTAGE (0.12V
TYP. AT 50mA LOAD, 7mV TYP. AT 1mA
LOAD)
VERY LOW QUIESCENT CURRENT (80µA
TYP. AT NO LOAD IN ON MODE; MAX 1µA
IN OFF MODE)
GUARANTEED OUTPUT CURRENT UP TO
50mA
LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
OUTPUT VOLTAGE OF 1.5; 1.8; 2.5; 2.85;
3.0; 3.2; 3.3; 3.6; 3.8; 4.0; 4.7; 4.85; 5.0V
INTERNAL CURRENT AND THERMAL LIMIT
± 0.5% TOLERANCE OUTPUT VOLTAGE
AVAILABLE (A VERSION)
OUTPUT LOW NOISE VOLTAGE 160µVRMS
TEMPERATURE RANGE: -40 TO 125°C
SMALLEST PACKAGE SOT23-5L AND
SOT-89
FAST DYNAMIC RESPONSE TO LINE AND
LOAD CHANGES
SOT23-5L
SOT-89
DESCRIPTION
The LD2980 series are 50mA fixed-output voltage
regulator. The low drop-voltage and the ultra low
SCHEMATIC DIAGRAM
quiescent current make them suitable for low
noise, low power applications and in battery
powered systems.
The quiescent current in sleep mode is less than
1µA when INHIBIT pin is pulled low. Shutdown
Logic Control function is available on pin n.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. The LD2980 is designed to
work with low ESR ceramic capacitor. Typical
applications are in cellular phone, palmtop/laptop
computer, personal digital assistant (PDA),
personal stereo, camcorder and camera.
September 2003
1/17
LD2980 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
V
I
V
INH
I
O
P
D
T
STG
T
OP
DC Input Voltage
INHIBIT Input Voltage
Output Current
Power Dissipation
Storage Temperature Range
Operating Junction Temperature Range
Parameter
Value
-0.3 to 16
-0.3 to 16
Internally limited
Internally limited
-55 to 150
-40 to 125
°C
°C
Unit
V
V
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
Symbol
R
thj-amb
Parameter
Thermal Resistance Junction-ambient
SOT23-5L
81
255
SOT-89
15
110
Unit
°C/W
°C/W
R
thj-case
Thermal Resistance Junction-case
CONNECTION DIAGRAM
(top view)
SOT23-5L
SOT-89
PIN DESCRIPTION
Pin N°
SOT23-5L
1
2
3
Pin N°
SOT-89
3
2
Symbol
V
IN
GND
INHIBIT
Input Port
Ground Pin
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
Not Connected
Output Port
Name and Function
4
5
1
NC
V
OUT
2/17
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