L1087N-3.3 [ETC]
0.8A Fixed and Adjustable Low Dropout Linear Regulator (LDO); 0.8A固定和可调低压差线性稳压器（ LDO ）
| 型号： | L1087N-3.3 |
| 厂家： | 
ETC |
| 描述： | 0.8A Fixed and Adjustable Low Dropout Linear Regulator (LDO) |
| 文件： | 总6页 (文件大小：63K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
0.8A Fixed and Adjustable Low Dropout L1087 Series
NIKO-SEM
SOT-89,TO-92
Linear Regulator (LDO)
GENERAL DESCRIPTION
FEATURES
The L1087 Series are positive and low
dropout three-terminal voltage regulators
with 0.8A output current capability. These
devices are designed for use in low voltage
applications that offers lower dropout volt-
age and faster transient response.
Fixed 3.3V or adjustable output voltage
Low dropout voltage
Low ground current
z
z
z
z
z
z
z
z
Fast transient response
Current & thermal limiting
Line regulation: 0.5% typical
Load regulation: 0.5% typical
Available in SOT-89 & TO-92 package
These devices are fully protected against
over current faults, over temperature oper-
ation, reversed input polarity, reversed lead
insertion, transient voltage spike …etc.
APPLICATIONS
Low voltage micro-controllers
Battery Chargers
5V to 3.3V linear regulators
Motherboard clock supplies
Post regulator for switching supplies
z
z
z
z
z
On-Chips trimming the reference voltage to
1% and features the low dropout of maxi-
mum 1.45 volts.
The L1087 Series regulators offer fixed and
adjustable voltage options available in the
space saving SOT-89 & TO-92 package.
TYPICAL APPLICATION
Vin
Vout
Vin > 4.75V
L1087
ADJ
IN
Vout = 3.3V
IN
OUT
L1087-3.3
GND
OUT
Vref
R1
R2
Cin
Cout
10uF
Cin
Cout
10uF
+
+
+
+
RL
10uF
10uF
Iadj
Vo = Vref (1+R2/R1) + Iadj x R2
1. Cin needed if device is far from filter capacitors.
2. Cout required for stability.
1. Cin needed if device is far from filter capacitors.
2. Cout required for stability.
- Basic Adjustable Regulator Circuit -
- Fixed Voltage Regulator -
AUG-30-2001
1
0.8A Fixed and Adjustable Low Dropout L1087 Series
NIKO-SEM
SOT-89,TO-92
Linear Regulator (LDO)
ABSOLUTE MAXIMUM RATINGS
Operating Junction
Temperature Range
Storage Temperature
Range
Lead Temperature
(Soldering, 10 Seconds)
z
z
Maximum Supply Voltage
15V*
0 to 125 °C
z
Internally
Limited
Power Dissipation
-40 to 150 °C
z
z
Thermal Resistance
z
18 °C/W
260 °C
Junction to Case,
θJC
Thermal Resistance
Junction to Ambient,
z
160 °C/W
θJA
* When considering short circuits to ground, the maximum input-to-output differential voltage shall not be allowed
greater than approximate 2~3V at values of supply voltage in excess of 10V, continuous short-circuits can exceed
the power dissipation ratings and cause eventual destruction.
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, TA = 25 °C)
Parameter
Symbol
Test Conditions
Typical
1.25V
VO
Limits
Reference Voltage
(Adjustable version)
Output Voltage
(Fixed version)
Dropout Voltage
Line Regulation
Load Regulation
1.23VMin
1.27VMax
0.98VO(Min)
1.02VO(Max)
1.45V
VREF VIN = 5V, IOUT = 10mA
VO
VIN = 5V, IOUT = 10mA
REF = 1%, IOUT = 0.8A
VD
REG(LINE)
1.2V
0.5%
0.5%
V
Δ
2%
2.5%
(VOUT + 1.5V) V
15V, IOUT = 10mA
≤
≤
IN
REG
(LOAD) (V -V ) = 2V, 10mA I
≤
OUT
0.8A
≤
IN
OUT
Minimum Load
Current
Adjust Pin Current
IO
IADJ
ICL
10mA
1.5V (V -V ) 5.75V
≤
≤
IN
OUT
55 A
100 A
µ
µ
Current Limit
VIN - VOUT = 2V
1.2A
0.9A (Min)
0.003%
of VOUT
RMS Output Noise
VN
RA
Ripple Rejection
Ratio
f = 120Hz, CADJ = 22 F for ADJ pin,
VIN = 5V, IOUT = 0.8A
µ
72dB
60dB (Min)
AUG-30-2001
2
0.8A Fixed and Adjustable Low Dropout L1087 Series
NIKO-SEM
SOT-89,TO-92
Linear Regulator (LDO)
ELECTRICAL CHARACTERISTICS FOR FIXED 3.3V(Unless otherwise specified, TA = 25 °C)
Parameter
Symbol
Test Conditions
Typical
Limits
Output Voltage
(Fixed version)
Dropout Voltage
Line Regulation
Load Regulation
3.234V(Min)
3.367V(Max)
1.45V
VO
VIN = 5V, IOUT = 10mA
V = 1%, IOUT = 0.8A
VO
VD
REG(LINE)
1.2V
0.5%
0.5%
Δ
O
2.0%
2.0%
(VOUT + 1.5V) V
15V, IOUT = 10mA
≤
≤
IN
REG
(LOAD) (V -V ) = 2V, 10mA I
≤
OUT
0.8A
≤
IN
OUT
Minimum Load
Current
GND Pin Current
IO
IGND
ICL
10mA
1.5V (V -V ) 5.75V
≤
≤
IN
OUT
55 A
100 A
µ
µ
Current Limit
VIN - VOUT = 2V
1.2A
0.9A (Min)
0.003%
of VOUT
RMS Output Noise
VN
RA
Ripple Rejection
Ratio
f = 120Hz, Co=22Uf,VIN = 5V,
IOUT = 0.8A
72dB
60dB (Min)
DEVICE SELECTION GUIDE
Device
L1087C
L1087C-3.3
3.3V
L1087N-3.3
3.3V
Voltage Version Adjustable
Package
Marking
SOT-89
L1087
SOT-89
87-3.3
TO-92
87N-3.3
AUG-30-2001
3
0.8A Fixed and Adjustable Low Dropout L1087 Series
NIKO-SEM
SOT-89,TO-92
Linear Regulator (LDO)
PIN CONFIGURATIONS
Pin #
Function
Adjust/Ground
Output
1
2
3
Input
Note: TAB is Output Pin
Pin #
Function
Output
1
2
3
Adjust/Ground
Input
AUG-30-2001
4
0.8A Fixed and Adjustable Low Dropout L1087 Series
NIKO-SEM
SOT-89,TO-92
Linear Regulator (LDO)
SOT-89 MECHANICAL DATA
mm
Typ.
4.5
mm
Typ.
1.5
3.0
1.5
4.2
0.4
Dimension
Dimension
Min.
Max.
4.7
1.8
0.6
2.6
1.4
0.5
0.6
Min.
1.4
2.8
1.3
3.8
0.3
Max.
1.6
3.2
1.7
4.6
0.5
A
B
C
D
E
F
4.3
1.6
0.4
2.4
0.8
0.4
0.4
H
I
1.7
0.5
J
2.5
K
L
1.2
0.45
0.5
M
N
G
AUG-30-2001
5
0.8A Fixed and Adjustable Low Dropout L1087 Series
NIKO-SEM
SOT-89,TO-92
Linear Regulator (LDO)
TO-92 MECHANICAL DATA
mm
mm
Typ.
Dimension
Dimension
Min.
Typ.
Max.
5.207
5.334
15.5
Min.
Max.
2.667
0.533
A
B
C
D
E
F
4.445
4.318
12.7
H
I
2.413
0.356
2.540
J
0.356
1.143
3.175
0.762
0.533
1.397
4.191
1.270
K
L
1.27
M
N
G
AUG-30-2001
6
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