NIKO L1089C-3.3A, L1089C-3.3B Datasheet
1
0.3A Fixed Low Dropout
Linear Regulator (LDO)
NIKO-SEM
L1089-3.3
SOT-89
JUL-11-2001
GENERAL DESCRIPTION
The L1089 Series are positive and low
dropout three-terminal voltage regulators
with 0.3A output current capability. These
devices are designed for use in low voltage
applications that offers lower dropout voltage and faster transient response.
These devices are fully protected against
over current faults, over temperature operation, reversed input polarity, reversed lead
insertion, transient voltage spike …etc.
On-Chips trimming the reference voltage to
2% and features the low dropout of maximum 1.35 volts.
FEATURES
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Fixed 3.3V output voltage
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Low dropout voltage
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Low ground current
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Fast transient response
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Current & thermal lim iting
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Line regulation: 0.5% typical
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Load regulation: 0.5% typical
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Available in SOT-89 package
APPLICATIONS
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Low voltage micro-controllers
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Battery Chargers
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5V to 3.3V linear regulators
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zz
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Motherboard clock supplies
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Post regulator for switching su pplies
TYPICAL APPLICATION
- Fixed Voltage Regulator -
Vin > 4.75V
OUT
GND
Vout = 3.3V
L1089-3.3
+
Cin
10uF
1. Cin needed if device is far from filter capacitors
RL
2. Cout required for stability.
+
Cout
10uF
IN
2
0.3A Fixed Low Dropout
Linear Regulator (LDO)
NIKO-SEM
L1089-3.3
SOT-89
JUL-11-2001
ABSOLUTE MAXIMUM RATINGS
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Maximum Supply Voltage 7V
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Operating Junction
Temperature Range
0 to 125 °C
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Power Dissipation
Internally
Limited
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Storage Temperature
Range
-40 to 150 °C
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Thermal Resistance
Junction to Case,
θ
JC
18 °C/W
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Lead Temperature
(Soldering, 10 Seconds)
260 °C
z
Thermal Resistance
Junction to Ambient,
θ
JA
160 °C/W
ELECTRICAL CHARACTERISTI CS
(
Unless otherwise specified, TA = 25 °C)
Parameter
Symbol
Test Conditions Typical Limits
Output Voltage
(Fixed version)
Vo VIN = 5V, I
OUT
= 10mA
3.30V
3.234V
Min
3.367 V
Max
Dropout Voltage VD
Δ
V
REF
= 1%, I
OUT
= 0.3A
1.1V 1.35V
Line Regulation REG
(LINE)
(V
OUT
+ 1.5V) ≤ V
IN
≤
7V, I
OUT
= 10mA
0.5% 1.0%
Load Regulation REG
(LOAD)
(V
IN -VOUT
) = 2V, 10mA ≤ I
OUT
≤ 0.3A
0.5% 2.0%
Minimum Load
Current
IO VIN=5.0V 10mA
Adjust Pin Current I
ADJ
55µA 100µA
Current Limit ICL VIN - V
OUT
= 2V 0.35A 0.32A (Min)
RMS Output Noise VN
0.003%
of V
OUT
Ripple Rejection
Ratio
R
A
V
IN
= 5V, I
OUT
= 0.3A
72dB 60dB (Min)
DEVICE SELECTION GUIDE
Device
L1089C-3.3A L1089C-3.3B
Voltage Version
3.3V 3.3V
Package
SOT-89 SOT-89
Marking
89-3.3A 89-3.3B
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