SGS Thomson Microelectronics LD2982BM28R, LD2982BM25R, LD2982BM18R, LD2982AM50R, LD2982AM47R Datasheet
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LD2982
SERIES
VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR
WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE
■ VERY LOW DRO PO UT VOLTAGE (120mV
AT 50mA AND 7mV AT 1mA LOAD)
■ VERY LOW QUIESCENT CURRENT (375µA
TYP. AT 50mA LOAD AND 75µAAT1mA)
■ OUTPUT CURRENT UP TO 50mA
■ LOGIC C ONTROLLED ELECTRONIC
SHUTDOWN
■ OUTPUT VOLTAGEOF1.5,1.8,2.5, 2.8,2.85,
3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.7, 5V
■ INTERNAL CURRENT AND THERM AL LIM IT
■ AVAILABLE IN ± 1% TOLLERANCE (AT25°C,
AVERSION)
■ SUPPLY VOLTAGE REJECTION: 45dB (TYP)
■ ONLY 1µF FOR STABILITY
■ LOW OUTPUT NOISE VOLTAGE 30µVrms
■ SMALLEST PACKAGE SOT23-5L
■ TEMPERATURE RANGE: -40°C TO 125°C
DESCRIPTION
The LD2982 is a 50mA fixed output voltage
regulator. The ultra low drop voltage and the low
quiescent current make them particularly suitable
for low noise, low power appl icati ons , and in
battery powered systems. In sleep mode
quiescent current is less than 1µA when INHIBIT
pin ispulled low. Shutdown LogicControl Function
is available onpi n 3 (TTL compatible). This means
that when t he device is used as local regulator, it
is possible to put a part of the board in standby,
decreasing the total powerconsumption.
An external capacitor C
between bypass pin and GND reduce the noise
to 30µV rms.
Typical applicat ion are in cellular phone, palmtop/
laptop computer, personal digital assistant (PDA),
personal stereo, ca mcorder and camera.
SOT23-5L
BYP
=10nF connected
SCHEMATIC DIAGRAM
1/13July 2003
LD2982 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
INH
I
P
T
T
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 Parameter SOT23-5L Unit
R
thj-case
CONNECTION DIAGRAM (top view) PIN DESCRIPTION
DC Input Voltage
I
INHIBIT Input Voltage
Output Current
O
Power Dissipation
tot
Storage Temperature Range
stg
Operating Junction Temperature Range
op
Thermal Resistance Junction-case
SOT23-5L
16 V
16 V
Internally limited
Internally limited
-65 to +150 °C
-40 to +125 °C
81 °C/W
Pin N° Symbol Name and Function
1 IN Input Port
2 GND Ground Pin
3 INHIBIT 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
4 Bypass Bypass Pin: Capacitor to be
connected to GND in order to
improve the thermal noise
performances.
5 OUT Output Port
ORDERING CODES
A VERSION B VERSION OUTPUT VOLTAGES
LD2982AM15R LD2982BM15R 1.5V
LD2982AM18R LD2982BM18R 1.8V
LD2982AM25R LD2982BM25R 2.5V
LD2982AM28R LD2982BM28R 2.8V
LD2982AM285R LD2982BM285R 2.85V
LD2982AM30R LD2982BM30R 3.0V
LD2982AM31R LD2982BM31R 3.1V
LD2982AM32R LD2982BM32R 3.2V
LD2982AM33R LD2982BM33R 3.3V
LD2982AM35R LD2982BM35R 3.5V
LD2982AM36R LD2982BM36R 3.6V
LD2982AM38R LD2982BM38R 3.8V
LD2982AM40R LD2982BM40R 4.0V
LD2982AM47R LD2982BM47R 4.7V
LD2982AM50R LD2982BM50R 5.0V
2/13
LD2982 SE RIE S
ELECTRICAL CHARACTERISTICS FOR LD2982A (TJ= 25°C, VI=VO+1V, IO=1mA, V
C
=1µF, CO=1µF, unless otherwise specified)
I
SHDN
=2V,
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
Operating Input Voltage 2.5 16 V
Op
Output Voltage VI= 2.5V 1.485 1.5 1.515 V
V
O
= 1 to 50mA 1.477 1.523 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 2.8V 1.782 1.8 1.818 V
O
= 1 to 50mA 1.773 1.827 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 3.5V 2.475 2.5 2.525 V
O
= 1 to 50mA 2.462 2.537 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 3.8V 2.772 2.8 2.828 V
O
= 1 to 50mA 2.758 2.842 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 3.85V 2.821 2.85 2.879 V
O
= 1 to 50mA 2.807 2.893 V
I
O
IO=1to50mA TJ= -40 to 125°C
V
Output Voltage VI= 4.0V 2.970 3.0 3.030 V
O
= 1 to 50mA 2.955 3.045 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 4.1V 3.069 3.1 3.131 V
O
= 1 to 50mA 3.053 3.146 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 4.2V 3.168 3.2 3.232 V
O
= 1 to 50mA 3.152 3.248 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 4.3V 3.267 3.3 3.333 V
O
= 1 to 50mA 3.250 3.349 V
I
O
=1to50mA TJ= -40 to 125°C
I
O
V
Output Voltage VI= 4.5V 3.465 3.5 3.535 V
O
= 1 to 50mA 3.447 3.552 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 4.6V 3.564 3.6 3.636 V
O
= 1 to 50mA 3.546 3.654 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 4.8V 3.762 3.8 3.838 V
O
= 1 to 50mA 3.743 3.857 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 5.0V 3.96 4 4.04 V
O
= 1 to 50mA 3.94 4.06 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
1.470 1.530 V
1.764 1.836 V
2.45 2.55 V
2.744 2.856 V
2.793 2.907 V
2.94 3.06 V
3.038 3.162 V
3.136 3.264 V
3.234 3.366 V
3.43 3.57 V
3.528 3.672 V
3.724 3.876 V
3.92 4.08 V
3/13
LD2982 SERIES
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
Output Voltage VI= 5.7V 4.653 4.7 4.747 V
O
= 1 to 50mA 4.629 4.77 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
V
Output Voltage VI= 6.0V 4.95 5 5.05 V
O
= 1 to 50mA 4.925 5.075 V
I
O
I
=1to50mA TJ= -40 to 125°C
O
I
Short Circuit Current RL= 0 150 mA
SC
/∆VILine Regulation VI=VO+1V to 16V, IO= 1mA 0.003 0.014 %/V
∆V
O
VI=VO+1V to 16V, IO= 1mA
= -40 to 125°C
T
J
V
Dropout Voltage IO=0 1 3 mV
d
I
=0 TJ= -40 to 125°C
O
I
=1mA 7 10 mV
O
I
=1mA TJ= -40 to 125°C
O
I
= 10mA 40 60 mV
O
I
= 10mA TJ= -40 to 125°C
O
I
= 50mA 120 150 mV
O
I
= 50mA TJ= -40 to 125°C
O
I
Quiescent Current IO= 0 80 100 µA
d
I
=0 TJ= -40 to 125°C
O
I
= 1mA 100 150 µA
O
I
=1mA TJ= -40 to 125°C
O
I
= 10mA 200 300 µA
O
I
= 10mA TJ= -40 to 125°C
O
I
= 50mA 600 900 µA
O
I
= 50mA TJ= -40 to 125°C
O
SVR Supply Voltage Rejection C
V
Control Input Logic Low
IL
Control Input Logic High
V
IH
I
Control Input Current
iNH
OFF MODE V
OFF MODE V
T
= -40 to 125°C
J
= 0.01µFCO=10µF f = 1KHz 45 dB
BYP
T
= -40 to 125°C
J
T
= -40 to 125°C
J
T
= -40 to 125°C V
J
T
= -40 to 125°C V
J
<0.18V 0 µA
INH
<0.18V
INH
=5V
SHDN
=0V
SHDN
eN Output Noise Voltage B= 300Hz to 50KHz
= 0.01µFC
C
BYP
=10µF
O
4.606 4.794 V
4.9 5.1 V
0.032 %/V
5mV
15 mV
90 mV
225 mV
150 µA
200 µA
400 µA
1200 µA
1 µA
0.15 V
2V
515µA
0-1µA
30 µV
I
I
4/13
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