LT1120CS8#TR [Linear]
LT1120 - Micropower Regulator with Comparator and Shutdown; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C;
| 型号： | LT1120CS8#TR |
| 厂家： | 
Linear |
| 描述： | LT1120 - Micropower Regulator with Comparator and Shutdown; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C 光电二极管 输出元件 调节器 |
| 文件： | 总12页 (文件大小：126K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1120
Micropower Regulator with
Comparator and Shutdown
U
FEATURES
DESCRIPTIO
The LT®1120 is a combination micropower positive regu-
lator and free collector comparator on a single monolithic
chip. With only 40μA supply current, the LT1120 can
supply over 125mA of output current. Input voltage range
is from 4.5V to 36V and dropout voltage is 0.6V at 125mA.
Dropout voltage decreases with lower load currents. Also
included on the chip is a class B output 2.5V reference that
can either source or sink current. A shutdown pin allows
logic shutdown of the output.
■
40μA Supply Current
■
125mA Output Current
■
2.5V Reference Voltage
■
Reference Output Sources 2mA and Sinks 2mA
■
Open Collector Comparator Sinks 10mA
■
Logic Shutdown
■
0.2V Dropout Voltage
■
Thermal Limiting
■
Available in 8-Lead DIP and SO Packages
The comparator can be used for system or battery moni-
toring. For example, the comparator can be used to warn
of low system voltage. Frequency compensation of the
comparator for amplifier applications can be obtained by
adding external output capacitance.
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APPLICATIO S
■
Battery Systems
■
Battery-Backup System
Portable Terminals
Portable Instruments
Memory Keep-Alive
■
■
■
The 2.5V reference will source or sink current. This allows
it to be used as a supply splitter or auxiliary output.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
U
TYPICAL APPLICATIO
Dropout Voltage and Supply Current
1.00
0.10
0.01
10
5V Regulator
5
4
V
Q
> 5.2V
IN
= 40μA
V
V
OUT
5V
IN
I
0.001μF
1M
1M
LT1120
1
+
+
2
10μF
FB
25μF
SHDN
3
GND
1
SHUTDOWN
1120 TA01
0.1
1000
0.1
1
10
100
OUTPUT CURRENT (mA)
1120 TA02
1120fd
1
LT1120
W W U W
ABSOLUTE AXI U RATI GS (Note 1)
Input Voltage ........................................................... 36V
NPN Collector Voltage ............................................. 36V
Output Short-Circuit Duration.......................... Indefinite
Power Dissipation............................... Internally Limited
Operating Temperature Range
LT1120C................................................ 0°C to 100°C
LT1120I ................................................ –40 to 100°C
Storage Temperature Range ................. –65°C to 150°C
U
W
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PACKAGE/ORDER I FOR ATIO
ORDER PART
ORDER PART
TOP VIEW
TOP VIEW
NUMBER
NUMBER
–INPUT
GND
FB
1
2
3
4
–INPUT
COMPOUT
REF
8
7
6
5
LT1120CN8
LT1120CS8
LT1120IN8
LT1120IS8
8
LT1120CH
GND
1
3
7
5
COMPOUT
SHDN
6
2
FB
REF
V
OUT
V
IN
SHDN
V
IN
4
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
S8 PART MARKING
8-LEAD PLASTIC SO
V
OUT
TJMAX = 110°C, θJA = 130°C/W (N)
TJMAX = 110°C, θJA = 150°C/W (S)
H PACKAGE
8-LEAD TO-5 METAL CAN
1120
1120I
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W
ORDER PART
NUMBER
J8 PACKAGE
8-LEAD CERDIP
TJMAX = 150°C, θJA = 100°C/W (J)
LT1120CJ8
OBSOLETE PACKAGES
Consider the N8 and S8 Packages for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. Tj = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference
Reference Voltage
Line Regulation
Load Regulation
Output Source Current
Output Sink Current
Temperature Stability
Regulator
4.5V ≤ V ≤ 36V
2.46
2.50
0.01
0.3
4
2.54
0.015
0.6
V
%/V
%
IN
4.5V ≤ V ≤ 36V
IN
–2mA ≤ I ≤ 2mA, V = 12V
REF
IN
V
V
= 5V
= 5V
2
2
mA
mA
%
IN
IN
4
1
Supply Current
V
V
V
= 6V, I
= 36V, I
= 12V, I
≤ 100μA
45
75
11
80
100
20
μA
μA
mA
IN
IN
IN
OUT
≤ 100μA
OUT
OUT
= 125mA
Output Current
Load Regulation
Line Regulation
Dropout Voltage
(V – V ) ≥ 1V, V ≥ 6V
125
mA
%
IN
OUT
IN
(V – V ) ≥ 1V, V ≥ 6V
0.2
0.5
IN
OUT
IN
6V ≤ V ≤ 36V
0.01
0.015
%/V
IN
I
I
= 100μA
= 125mA
0.02
0.4
0.05
0.65
V
V
OUT
OUT
1120fd
2
LT1120
The ● denotes the specifications which apply over the full
ELECTRICAL CHARACTERISTICS
operating temperature range, otherwise specifications are at TA = 25°C. Tj = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
2.56
0.4
UNITS
V
Feedback Sense Voltage
Shutdown Pin Voltage
V
= 12V
2.44
2.5
IN
Normal
V
V
V
≤ 0.5V
Shutdown
2.2
1.4
25
15
1
V
OUT
Shutdown Pin Current
Feedback Bias Current
Minimum Load Current
Short-Circuit Current
Comparator
= 1.4V
μA
nA
μA
mA
IN
40
5
V
V
= 36V
IN
IN
= 36V
300
400
Offset Voltage
V
V
= 36V
3
15
7
mV
nA
V/V
dB
mA
V
IN
IN
Bias Current
= 36V (Note 2)
40
Gain
ΔV
= 29V, R = 20k
2000
80
10000
96
OUT
L
Power Supply Rejection
Output Sink Current
Saturation Voltage
Input Voltage Range
Response Time
4.5V ≤ V ≤ 36V
S
V
= 4.5V
10
18
IN
I
= 1mA
0.4
0.6
OUT
0
V
– 1
V
IN
5
μs
Leakage Current
2
μA
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference
Reference Voltage
Line Regulation
Load Regulation
Output Source Current
Output Sink Current
Regulator
4.5V ≤ V ≤ 36V
●
●
●
●
●
2.40
2.50
0.01
0.4
2.55
0.02
0.8
V
%/V
%
IN
4.5V ≤ V ≤ 36V
IN
–2mA ≤ I ≤ 2mA, V = 12V
REF
IN
V
V
= 5V
= 5V
2
2
mA
mA
IN
IN
Supply Current
V
V
V
= 6V, I
= 36V, I
= 12V, I
≤ 100μA
●
●
●
65
85
11
95
100
20
μA
μA
mA
IN
IN
IN
OUT
≤ 100μA
OUT
OUT
= 125mA
Output Current
Load Regulation
Line Regulation
Dropout Voltage
(V – V ) ≥ 1V, V ≥ 6V
●
●
●
125
mA
%
IN
OUT
IN
(V – V ) ≥ 1V, V ≥ 6V
1
IN
OUT
IN
6V ≤ V ≤ 36V
0.02
%/V
IN
I
I
= 100μA
= 125mA
●
●
0.06
0.85
V
V
OUT
OUT
Feedback Sense Voltage
Feedback Bias Current
Minimum Load Current
Short-Circuit Current
V
= 12V
●
●
●
●
2.38
2.5
2.57
50
V
nA
IN
V
V
= 36V
= 36V
50
μA
IN
IN
300
400
mA
1120fd
3
LT1120
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
Comparator
Offset Voltage
Bias Current
Gain
CONDITIONS
MIN
TYP
MAX
UNITS
●
●
●
●
●
10
60
mV
nA
V
= 36V (Note 2)
15
10
IN
ΔV
OUT
= 29V, R = 20k
1000
5
V/V
mA
μA
L
Output Sink Current
Leakage Current
V
V
= 4.5V (Note 3)
= 36V
IN
IN
8
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: T > 85°C, I bias maximum is 100nA.
A
Note 3: For T ≤ –40°C output current sink drops to 2.5mA.
A
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Regulator Load Regulation
Supply Current
Regulator Short-Circuit Current
0.3
0.2
100
10
350
300
250
200
150
100
50
T
= –55°C
= 25°C
J
T
J
= –55°C TO 125°C
T
J
0.1
0
1
T
= 125°C
J
–0.1
–0.2
–0.3
0.1
0.01
CURRENT LIMIT TIED TO GROUND
PRELOAD = 100μA
0
–50
0.1
1
10
100
1000
0.1
1
10
100
1000
–10
30
70
110
150
OUTPUT CURRENT (mA)
REGULATOR OUTPUT CURRENT (mA)
TEMPERATURE (°C)
1120 G01
1120 G02
1120 G03
Dropout Voltage
Regulator Minimum Load Current
Regulator Ripple Rejection
1
70
65
60
55
50
45
40
35
30
100
10
1
ΔV
= 100mV
OUT
I
= 100mA
OUT
I
= 10mA
OUT
0.1
I
= 1mA
OUT
V
V
C
= 10VDC, 1V
P–P
IN
= 5V
OUT
OUT
= 10μF
0.01
0.1
1
10
100
1000
10
100
1k
10k
100k
70 80 90 100 110 120 130 140 150
REGULATOR OUTPUT CURRENT (mA)
RIPPLE FREQUENCY (Hz)
TEMPERATURE (°C)
1120 G04
1120 G06
1120 G05
1120fd
4
LT1120
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current
Supply Current at Dropout
10
10
1
T
= –55°C TO 125°C
J
I
= 100mA
= 10mA
OUT
I
= 100mA
OUT
1
0.1
I
I
= 10mA
= 1mA
I
I
OUT
OUT
OUT
0.1
= 1mA
0.5
OUT
V
J
= 5V
OUT
T
= –55°C TO 125°C
0.01
0.01
1
5
10
15
20
25
1
0.1
0.2
0.3
0.4
0.6
REGULATOR INPUT-OUTPUT DIFFERENTIAL (V)
REGULATOR INPUT-OUTPUT DIFFERENTIAL (V)
1120 G07
1120 G08
Reference Regulation
Feedback Pin Current
40
35
30
25
20
15
10
5
4
3
T
T
= –55°C
2
J
1
0
= 25°C
J
J
–1
–2
–3
–4
T
= 125°C
0
0.1
1
10
100
1000
–1.5 –1.0 –0.5
0
0.5
1.0
1.5
REGULATOR OUTPUT CURRENT (mA)
REFERENCE OUTPUT CURRENT (mA)
1120 G11
1120 G09
LT1120 Turn-On Characteristic
Regulator Thermal Regulation
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
0
0.1
0
V
V
= 15V
= 5V
IN
OUT
V
= 5V
OUT
NO LOAD
R
= 500Ω
L
–0.1
50
0
R
L
= 50Ω
0
20 40 60 80 100 120 140 160 180
TIME (ms)
0
1
2
3
4
5
6
7
8
INPUT VOLTAGE (V)
1120 G12
1120 G13
1120fd
5
LT1120
U
U
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PI FU CTIO S
GND (Pin 1): Ground.
VIN (Pin 5): Input Supply. Bypass with a 10μF capacitor.
Must always be more positive than ground.
FB (Pin 2): Feedback. This is the feedback point of the
regulator. When operating, it is nominally at 2.5V. Opti-
mum source resistance is 200k to 500k. The feedback pin
should not be driven below ground or more positive than
5V.
REF (Pin 6): Reference. 2.5V can source or sink current.
May be shorted to ground or up to 5V. Voltages in excess
of 5V can damage the device.
COMPOUT (Pin 7): Comparator Output. Open Collector
NPN Output. May be connected to any voltage from
ground to 36V more positive than ground (operates above
VIN). Short-circuit protected.
SHDN (Pin 3): Shutdown. A logic 1 shuts off the main
regulator. Caution: noise or leakage into the shutdown pin
can affect output voltage.
V
OUT (Pin 4): Regulator Output. Main output, requires a
–INPUT (Pin 8): Comparator Input. Inverting comparator
input.
10μF output capacitor. Can be shorted to VIN or ground
without damaging the device.
W
BLOCK DIAGRA
REF
6
V
5
7
IN
50k
+
–
–
+
COMPOUT
4
V
OUT
REF
2.5V
2
3
1
FB
60k
SHDN
GND
1120 BD
8
–INPUT
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APPLICATIO S I FOR ATIO
The LT1120 is especially suited for micropower system
applications. For example, the comparator section of the
LT1120 may be used as a battery checker to provide an
indication of low battery. Another type of system applica-
tion for the LT1120 would be to generate the equivalent of
split supplies off of a single power input. The regulator
section provides regulated output voltage and the refer-
ence, which can both source and sink current, is then an
artificial system ground providing a split supply for the
system.
For many applications the comparator can be frequency
compensated to operate as an amplifier. Compensation
values for various gains are given in the data sheet. The
comparator gain is purposely low to make it easier to
frequency compensate as an amplifier. The NPN output is
capable of sinking 10mA and can drive loads connected to
voltages in excess of the positive power supply. This is
useful for driving switches or linear regulators off of a
higher input voltage.
1120fd
6
LT1120
U
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APPLICATIO S I FOR ATIO
Reference
Overload Protection
Internal to the LT1120 is a 2.5V trimmed class B output
reference.Thereferencewasdesignedtobeabletosource
or sink current so it could be used in supply splitting
applications as well as a general purpose reference for
external circuitry. The design of the reference allows it to
source typically 4mA or 5mA and sink 2mA. The available
source and sink current decreases as temperature in-
creases. It is sometimes desirable to decrease the AC
outputimpedancebyplacinganoutputcapacitoronthem.
The reference in the LT1120 becomes unstable with large
capacitive loads placed directly on it. When using an
output capacitor, about 20Ω should be used to isolate the
capacitor from the reference pin. This 20Ω resistor can be
placed directly in series with the capacitor or alternatively
thereferencelinecanhave20Ωplacedinserieswithitand
thenacapacitortoground.ThisisshowninFigure1.Other
than placing large capacitive loads on the reference, no
other precautions are necessary and the reference is
stable with nominal stray capacitances.
The main regulator in the LT1120 is current limited at
approximately250mA.Thecurrentlimitisstablewithboth
input voltage and temperature.
Like most other IC regulators, a minimum load is required
on the output of the LT1120 to maintain regulation. For
most standard regulators this is normally specified at
5mA. Of course, for a micropower regulator this would be
a tremendously large current. The output must be large
enough to absorb all the leakage current of the pass
transistor at the maximum operating temperature. It also
effects the transient response; low output currents have
long recovery times from load transients. At high operat-
ingtemperaturestheminimumloadcurrentincreasesand
having too low of a load current may cause the output to
go unregulated. Devices are tested for minimum load
current at high temperature. The output voltage setting
resistors to the feedback terminal can usually be used to
provide the minimum load current.
Frequency Compensation
TheLT1120isfrequencycompensatedbyadominantpole
on the output. An output capacitor of 10μF is usually large
enough to provide good stability. Increasing the output
capacitor above 10μF further improves stability. In order
toensurestability,afeedbackcapacitorisneededbetween
the output pin and the feedback pin. This is because stray
capacitance can form another pole with the large value of
feedback resistors used with the LT1120. Also, a feedback
capacitor minimizes noise pickup and improves ripple
rejection.
REF
REF
6
6
OUTPUT
20Ω
20Ω
OR
OUTPUT
10μF
+
+
10μF
1120 F01
Figure 1. Bypassing Reference
With the large dynamic operating range of the output
current, 10000:1, frequency response changes widely.
Low AC impedance capacitors are needed to insure stabil-
ity. While solid tantalum are best, aluminum electrolytics
can be used but larger capacitor values may be needed.
1120fd
7
LT1120
U
TYPICAL APPLICATIO S
Regulator with Output Voltage Monitor
5
4
5V
V
V
OUT
IN
LT1120
V
OUT
5V
500k
7
0.001μF
98k
2k
LOGIC
V
–
+
OUT
LOGIC
OUTPUT
–INPUT
FB
8
2
+
PIN 7
10μF
LOGIC
OUTPUT
REF
6
GND
100k
1
1120 TA03
LOGIC OUTPUT GOES LOW WHEN V
DROPS BY 100mV
OUT
1A Low Dropout Regulator
Compensating the Comparator as an Op Amp
V
IN
50μA
6
+
7
2.2k
8
MJE2955
AT Av = 100,
–
5
SLEW RATE = +0.05V/μs
*
4
V
–6V/μs
V
IN
OUT
V
OUT
1M
5V
10k*
100k
100k
0.001μF
LT1120
+
R2
R1
C1
2
220μF†
FB
GND
1
C2
150Ω*
1120 TA04
Av
1
10
R1
C1
0.1μF
0.047μF
0.002μF
C2
0.001μF
—
R2
—
100k
10k
1120 TA05
* FOR CURRENT LIMIT ≈ 1.5A
33Ω
100Ω
10k
† MUST HAVE LOW ESR. SEVERAL 100μF CAPACITORS CAN BE PARALLELED.
100
—
1120fd
8
LT1120
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TYPICAL APPLICATIO S
Regulator with Improved Transient Response
5V Regulator
5
4
5
4
V
Q
> 5.2V
IN
V
IN
V
OUT
V
V
5V
V
> 5.2V
5V
IN
OUT
IN
I
= 40μA
0.001μF
1M
1M
0.001μF
0.001μF
1M
LT1120
LT1120
+
+
+
2
2
10μF
FB
FB
25μF
25μF
GND
1
GND
1
1M
22k
1120 TA06
1120 TA07
Battery-Backup Regulator
V
OUT
5V
MAIN
POWER
INPUT
5
4
4
2
5
BATTERY
INPUT
V
IN
V
V
V
IN
OUT
OUT
+
0.001μF
1M
10μF
LT1120
LT1120
2
FB
FB
GND
1
GND
1
50k
1M
INTERNAL PARASITIC
DIODES OF LT1120
1120 TA08
V
IN
V
OUT
5V Regulator with Feedback Shutdown
5
4
V
Q
> 5.2V
5V
OUT
IN
= 40μA
V
IN
V
OUT
I
+
10μF
0.001μF
1M
1M
LT1120
2
FB
GND
1
LOGIC
INPUT
2N3904*
NC
1120 TA09
* TRANSISTOR USED BECAUSE OF LOW LEAKAGE CHARACTERISTICS.
TO TURN OFF THE OUTPUT OF THE LT1120 FORCE FB (PIN 2) > 2.5V.
1120fd
9
LT1120
W
W
SCHE ATIC DIAGRA
1120fd
10
LT1120
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PACKAGE DESCRIPTIO
H Package
8-Lead TO-5 Metal Can (.230 Inch PCD)
(Reference LTC DWG # 05-08-1321)
.335 – .370
(8.509 – 9.398)
DIA
.027 – .045
(0.686 – 1.143)
.305 – .335
(7.747 – 8.509)
.040
45°TYP
PIN 1
.028 – .034
(0.711 – 0.864)
.050
(1.270)
MAX
(1.016)
MAX
.165 – .185
(4.191 – 4.699)
.230
REFERENCE
PLANE
(5.842)
SEATING
PLANE
TYP
GAUGE
PLANE
.500 – .750
(12.700 – 19.050)
.010 – .045*
H8 (TO-5) 0.230 PCD 0801
.110 – .160
(0.254 – 1.143)
(2.794 – 4.064)
INSULATING
STANDOFF
.016 – .021**
(0.406 – 0.533)
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND THE SEATING PLANE
.016 – .024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610)
J8 Package
8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
.405
(10.287)
MAX
.005
(0.127)
MIN
.200
(5.080)
MAX
.300 BSC
(7.62 BSC)
CORNER LEADS OPTION
(4 PLCS)
6
5
4
8
7
.015 – .060
(0.381 – 1.524)
.023 – .045
.025
(0.635)
RAD TYP
.220 – .310
(5.588 – 7.874)
(0.584 – 1.143)
HALF LEAD
OPTION
.008 – .018
(0.203 – 0.457)
0° – 15°
.045 – .068
(1.143 – 1.650)
FULL LEAD
OPTION
1
2
J8 0801
3
.045 – .065
(1.143 – 1.651)
.125
3.175
MIN
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
.014 – .026
(0.360 – 0.660)
.100
(2.54)
BSC
OBSOLETE PACKAGES
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
.130 ± .005
.300 – .325
.045 – .065
(3.302 ± 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
8
1
7
6
5
4
.065
(1.651)
TYP
.255 ± .015*
(6.477 ± 0.381)
.008 – .015
(0.203 – 0.381)
.120
.020
(0.508)
MIN
(3.048)
MIN
+.035
–.015
2
3
.325
.018 ± .003
(0.457 ± 0.076)
.100
(2.54)
BSC
N8 1002
+0.889
8.255
(
)
–0.381
NOTE:
INCHES
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
1. DIMENSIONS ARE
MILLIMETERS
1120fd
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
11
LT1120
U
TYPICAL APPLICATIO
Current Limited 1A Regulator
0.5Ω*
V
IN
2.2k
MJE2955
2N3906*
5
V
IN
V
V
OUT
4
2
OUT
5V
AT 1A
0.22μF
100k
100k
LT1120
+
220μF†
FB
GND
1
270Ω
1120 TA10
* SETS CURRENT LIMIT BUT INCREASES DROPOUT VOLTAGE BY 0.5V
† MUST HAVE LOW ESR. SEVERAL 100μF CAPACITORS CAN BE PARALLELED
U
PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
NOTE 3
.045 ±.005
.160 ±.005
.010 – .020
(0.254 – 0.508)
7
5
8
6
× 45°
.053 – .069
(1.346 – 1.752)
.050 BSC
.004 – .010
(0.101 – 0.254)
.008 – .010
0°– 8° TYP
(0.203 – 0.254)
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
.245
MIN
.016 – .050
(0.406 – 1.270)
.050
(1.270)
BSC
.014 – .019
(0.355 – 0.483)
TYP
NOTE:
INCHES
1. DIMENSIONS IN
(MILLIMETERS)
SO8 0303
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
.030 ±.005
TYP
1
2
3
4
RECOMMENDED SOLDER PAD LAYOUT
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1121
150mA Micropower Low Dropout Regulator
0.4V Dropout Voltage, Includes Shutdown,
SOT-223, S8 Packages
LT1521
LT1761
300mA Mircopower Low Dropout Regulator
Lowest I Low Dropout Regulator,
SOT-223, S8, MS8 Packages
Q
100mA Micropower Low Noise, Low Dropout Regulator
SOT-23, 20μV Noise, 20μA I ThinSOT Package
RMS Q,
1120fd
LT 0907 REV D • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
© LINEAR TECHNOLOGY CORPORATION 1989
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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