LT1120CH [Linear]
Micropower Regulator with Comparator and Shutdown; 微功率稳压器，比较器和关机
| 型号： | LT1120CH |
| 厂家： | 
Linear |
| 描述： | Micropower Regulator with Comparator and Shutdown |
| 文件： | 总12页 (文件大小：155K) |
| 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, SO and Metal Can 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
The 2.5V reference will source or sink current. This allows
it to be used as a supply splitter or auxiliary output.
■
Portable Terminals
■
Portable Instruments
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
Memory Keep-Alive
U
TYPICAL APPLICATIO
5V Regulator
Dropout Voltage and Supply Current
1.00
0.10
0.01
10
5
4
V > 5.2V
IN
I = 40µA
Q
V
V
5V
IN
OUT
0.001µF
1M
1M
LT1120
+
+
2
10µF
FB
25µF
SHDN
3
GND
1
1
SHUTDOWN
1120 TA01
0.1
1000
0.1
1
10
100
OUTPUT CURRENT (mA)
1120 TA02
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
TOP VIEW
TOP VIEW
ORDER PART
NUMBER
ORDER PART
–INPUT
GND
FB
1
2
3
4
–INPUT
COMPOUT
REF
8
7
6
5
NUMBER
8
GND
1
3
7
5
COMPOUT
LT1120CJ8
LT1120CN8
LT1120CS8
LT1120IN8
LT1120IS8
LT1120CH
SHDN
6
2
FB
REF
V
V
OUT
IN
SHDN
V
IN
4
J8 PACKAGE
N8 PACKAGE
8-LEAD CERDIP 8-LEAD PDIP
V
OUT
S8 PACKAGE
8-LEAD PLASTIC SO
H PACKAGE
8-LEAD TO-5 METAL CAN
S8 PART MARKING
TJMAX = 150°C, θJA = 100°C/W (J)
TJMAX = 110°C, θJA = 130°C/W (N)
TJMAX = 110°C, θJA = 150°C/W (S)
TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W
1120
1120I
Consult factory for Military grade parts.
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
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
Feedback Sense Voltage
Shutdown Pin Voltage
V
= 12V
2.44
2.2
2.5
2.56
0.4
V
V
V
IN
Normal
V
≤ 0.5V
Shutdown
1.4
OUT
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
25
MAX
UNITS
µA
Shutdown Pin Current
Feedback Bias Current
Minimum Load Current
Short-Circuit Current
Comparator
V
= 1.4V
IN
15
40
5
nA
V
V
= 36V
= 36V
1
µA
IN
IN
300
400
mA
Offset Voltage
V
V
= 36V
3
15
7
mV
nA
V/V
dB
mA
V
IN
IN
Bias Current
= 36V (Note 2)
40
Gain
∆V
= 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
ELECTRICAL CHARACTERISTICS
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
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
∆V
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: Absolute Maximum Ratings are those values beyond which the life
a device may be impaired.
Note 2: TA > 85°C, I bias maximum is 100nA.
Note 3: For T ≤ –40°C output current sink drops to 2.5mA.
A
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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
= –55°C TO 125°C
J
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
∆V
= 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
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
OUT
0.1
= 1mA
0.5
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
5
LT1120
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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. May be con-
nected to any voltage from ground to 36V more positive
thanground(operatesaboveVIN).Short-circuitprotected.
SHDN (Pin 3): Shutdown. A logic 1 shuts off the main
regulator. Caution: noise or leakage into the shutdown pin
can affect output voltage.
–INPUT (Pin 8): Comparator Input. Inverting comparator
input.
V
OUT (Pin 4): Regulator Output. Main output, requires a
10µF output capacitor. Can be shorted to VIN or ground
without damaging the device.
W
BLOCK DIAGRA
REF
6
V
5
7
IN
COMPOUT
50k
+
–
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.
6
LT1120
U
W U U
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.
7
LT1120
U
TYPICAL APPLICATIO S
Regulator with Output Voltage Monitor
5
4
5V
V
V
IN
OUT
V
OUT
5V
LT1120
500k
0.001µF
98k
2k
LOGIC
–
+
7
–INPUT
FB
8
2
+
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
V
8
MJE2955
AT Av = 100,
–
5
SLEW RATE = +0.05V/µs
*
4
2
V
–6V/µs
V
IN
OUT
OUT
FB
1M
5V
10k*
100k
100k
0.001µF
LT1120
+
R2
R1
C1
220µF†
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
—
8
LT1120
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TYPICAL APPLICATIO S
Regulator with Improved Transient Response
5V Regulator
5
4
5
4
V > 5.2V
IN
I = 40µA
Q
V
V
OUT
V
V
5V
V
IN
> 5.2V
5V
IN
IN
OUT
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
V
V
V
IN
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
V
OUT
IN
5V Regulator with Feedback Shutdown
5
4
V
IN
I
Q
> 5.2V
= 40µA
5V
V
V
IN
OUT
OUT
+
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.
9
LT1120
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SCHE ATIC DIAGRA
10
LT1120
U
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
H Package
8-Lead TO-5 Metal Can (0.200 PCD)
(LTC DWG # 05-08-1320)
0.335 – 0.370
(8.509 – 9.398)
DIA
0.027 – 0.045
(0.686 – 1.143)
45°TYP
PIN 1
0.305 – 0.335
(7.747 – 8.509)
0.040
0.028 – 0.034
(0.711 – 0.864)
0.050
(1.270)
MAX
0.200
(5.080)
(1.016)
MAX
0.165 – 0.185
(4.191 – 4.699)
TYP
REFERENCE
PLANE
SEATING
PLANE
GAUGE
PLANE
0.500 – 0.750
(12.700 – 19.050)
0.110 – 0.160
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND 0.045" BELOW THE REFERENCE PLANE
0.016 – 0.024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610)
(2.794 – 4.064)
INSULATING
STANDOFF
0.010 – 0.045*
(0.254 – 1.143)
0.016 – 0.021**
(0.406 – 0.533)
H8(TO-5) 0.200 PCD 1197
J8 Package
8-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC DWG # 05-08-1110)
0.405
(10.287)
0.005
(0.127)
MIN
0.200
(5.080)
MAX
MAX
0.300 BSC
(0.762 BSC)
CORNER LEADS OPTION
(4 PLCS)
6
5
8
7
0.015 – 0.060
(0.381 – 1.524)
0.023 – 0.045
(0.584 – 1.143)
HALF LEAD
OPTION
0.025
(0.635)
RAD TYP
0.220 – 0.310
(5.588 – 7.874)
0.008 – 0.018
(0.203 – 0.457)
0° – 15°
0.045 – 0.068
(1.143 – 1.727)
FULL LEAD
OPTION
1
2
3
4
0.045 – 0.068
(1.143 – 1.727)
0.125
3.175
MIN
NOTE: LEAD DIMENSIONS APPLY
TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
0.100 ± 0.010
0.014 – 0.026
(2.540 ± 0.254)
(0.360 – 0.660)
J8 1197
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
8
1
7
6
5
0.065
(1.651)
TYP
0.255 ± 0.015*
(6.477 ± 0.381)
0.009 – 0.015
(0.229 – 0.381)
0.125
0.020
(0.508)
MIN
(3.175)
MIN
+0.035
–0.015
2
4
3
0.325
0.100 ± 0.010
(2.540 ± 0.254)
0.018 ± 0.003
+0.889
8.255
(
)
(0.457 ± 0.076)
N8 1197
–0.381
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
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
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
0.010 – 0.020
(0.254 – 0.508)
7
5
8
6
× 45°
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0.008 – 0.010
(0.203 – 0.254)
0°– 8° TYP
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
0.016 – 0.050
0.406 – 1.270
0.050
(1.270)
TYP
0.014 – 0.019
(0.355 – 0.483)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
SO8 0996
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1
3
4
2
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1121
150mA Micropower Low Dropout Regulator
300mA Mircopower Low Dropout Regulator
Micropower Low Noise, Low Dropout Regulator
0.4V Dropout Voltage, Includes Shutdown
Lowest I Low Dropout Regulator
LT1521
Q
LT1761
SOT-23, 20µV Noise, 20µA I
RMS Q
1120b LT/TP 0499 2K REV B • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1989
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com
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