LT1460MHS8-5 [Linear]
Micropower Precision Series Reference; 微功率精准串联基准
| 型号： | LT1460MHS8-5 |
| 厂家： | 
Linear |
| 描述： | Micropower Precision Series Reference |
| 文件： | 总12页 (文件大小：292K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1460-5
Micropower Precision
Series Reference
U
FEATURES
DESCRIPTIO
The LT®1460-5 is a micropower bandgap reference that
combines very high accuracy and low drift with low power
dissipation and small package size. This series reference
uses curvature compensation to obtain a low temperature
coefficient and trimmed precision thin-film resistors to
achievehighoutputaccuracy. Thereferencewillsupplyupto
20mA,makingitidealforprecisionregulatorapplications,yet
it is almost totally immune to input voltage variations.
■
High Accuracy: 0.075% Max
■
Low Drift: 10ppm/°C Max
■
■
■
■
■
■
■
■
Industrial Temperature Range SO-8 Package
Temperature Coefficient Guaranteed to 125
Low Supply Current: 175µA Max
Minimum Output Current: 20mA
No Output Capacitor Required
°C
Reverse Battery Protection
Minimum Input/Output Differential: 0.9V
Available in SmaUll MSOP Package
This series reference provides supply current and power
dissipation advantages over shunt references that must idle
the entire load current to operate. Additionally, the LT1460-5
is stable with capacitive loads and does not require an output
capacitor. This feature is important in critical applications
where PC board space is a premium or fast settling is
demanded. Reverse battery protection keeps the reference
from conducting current and being damaged.
APPLICATIO S
■
Handheld Instruments
■
Precision Regulators
■
A/D and D/A Converters
■
Power Supplies
Hard Disk Drives
■
The LT1460-5 is available in the 8-lead MSOP, SO, PDIP
and the 3-lead TO-92 packages. It is also available in the
SOT-23 package; see separate data sheet LT1460S3-5
(SOT-23).
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATIO
Typical Distribution of Output Voltage
S8 Package
Basic Connection
20
1400 PARTS
18
LT1460-5
5.9V
FROM 2 RUNS
16
5V
IN
OUT
TO 20V
14
12
10
8
C1
0.1µF
GND
1460-5 TA01
6
4
2
0
–0.10
–0.06 –0.02 0 0.02
0.06
0.10
OUTPUT VOLTAGE ERROR (%)
1460-5 TA02
1
LT1460-5
ABSOLUTE MAXIMUM RATINGS
W W
U W
(Note 1)
Input Voltage ........................................................... 30V
Reverse Voltage.................................................... –15V
Output Short-Circuit Duration, TA = 25°C
Specified Temperature Range
Commercial (C) ...................................... 0°C to 70°C
Industrial (I) ...................................... –40°C to 85°C
High (H)............................................ –40°C to 125°C
Storage Temperature Range (Note 2) ... –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
VIN > 10V........................................................... 5 sec
VIN ≤ 10V ................................................... Indefinite
U
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PACKAGE/ORDER INFORMATION
TOP VIEW
TOP VIEW
BOTTOM VIEW
DNC* 1
8 DNC*
7 DNC*
DNC*
1
2
3
4
DNC*
DNC*
8
7
6
5
3
2
1
V
2
IN
*
CONNECTED INTERNALLY.
DO NOT CONNECT
EXTERNAL CIRCUITRY
TO THESE PINS
6 V
V
DNC* 3
GND 4
OUT
IN
V
V
OUT
GND
IN
5 DNC*
DNC*
GND
V
OUT
MS8 PACKAGE
8-LEAD PLASTIC MSOP
DNC*
*CONNECTED INTERNALLY.
DO NOT CONNECT EXTERNAL
CIRCUITRY TO THESE PINS
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
Z PACKAGE
3-LEAD TO-92 PLASTIC
TJMAX = 150°C, θJA = 160°C/ W
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 130°C/ W (N8)
TJMAX = 150°C, θJA = 190°C/ W (S8)
TJMAX = 150°C, θJA = 250°C/ W
ORDER PART NUMBER
ORDER PART NUMBER
ORDER PART NUMBER
LT1460CCMS8-5
LT1460FCMS8-5
LT1460ACN8-5
LT1460BIN8-5
LT1460DCN8-5
LT1460EIN8-5
LT1460ACS8-5
LT1460BIS8-5
LT1460DCS8-5
LT1460EIS8-5
LT1460LHS8-5
LT1460MHS8-5
LT1460GCZ-5
LT1460GIZ-5
MS8 PART MARKING
S8 PART MARKING
LTAF
LTAG
1460A5
460BI5
1460D5
460EI5
460LH5
460MH5
Consult factory for Military grade parts.
Available Options
TEMPERATURE
COEFFICIENT
PACKAGE TYPE
ACCURACY
N8
S8
MS8
Z
TEMPERATURE
0°C to 70°C
(%)
0.075
0.10
0.10
0.10
0.125
0.15
0.25
0.25
0.20
0.20
(ppm/°C)
10
LT1460ACN8-5
LT1460BIN8-5
LT1460ACS8-5
LT1460BIS8-5
–40°C to 85°C
0°C to 70°C
10
15
LT1460CCMS8-5
LT1460FCMS8-5
0°C to 70°C
20
LT1460DCN8-5
LT1460EIN8-5
LT1460DCS8-5
LT1460EIS8-5
–40°C to 85°C
0°C to 70°C
20
25
0°C to 70°C
25
LT1460GCZ-5
LT1460GIZ-5
–40°C to 85°C
–40°C to 85°C/125°C
–40°C to 125°C
25
20/50
50
LT1460LHS8-5
LT1460MHS8-5
2
LT1460-5
ELECTRICAL CHARACTERISTICS
VIN = 7.5V, IOUT = 0, TA = 25°C unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage (Note 3)
LT1460ACN8, ACS8
LT1460BIN8, BIS8, CCMS8, DCN8, DCS8
LT1460EIN8, EIS8
4.99625
–0.075
5.000
5.00375
0.075
V
%
4.995
–0.10
5.000
5.005
0.10
V
%
4.99375
–0.125
5.000 5.00625
0.125
V
%
LT1460FCMS8
4.9925
–0.15
5.000
5.000
5.000
5.0075
0.15
V
%
LT1460GCZ, GIZ
4.9875
–0.25
5.0125
0.25
V
%
LT1460LHS8, MHS8
4.990
–0.20
5.010
0.20
V
%
Output Voltage Temperature Coefficient (Note 4)
T
≤ T ≤ T
MIN J MAX
LT1460ACN8, ACS8, BIN8, BIS8
LT1460CCMS8
●
●
●
●
●
●
●
5
7
10
12
10
25
25
10
15
20
25
20
50
50
ppm/°C
ppm/°C
ppm/°C
ppm/°C
ppm/°C
ppm/°C
ppm/°C
LT1460DCN8, DCS8, EIN8, EIS8
LT1460FCMS8, GCZ, GIZ
LT1460LHS8
LT1460MHS8
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
Line Regulation
5.9V ≤ V ≤ 7.5V
30
60
80
ppm/V
ppm/V
IN
●
●
●
●
●
7.5V ≤ V ≤ 20V
10
25
35
ppm/V
ppm/V
IN
Load Regulation Sourcing (Note 5)
I
I
I
= 100µA
= 10mA
= 20mA
1500
80
2800
3500
ppm/mA
ppm/mA
OUT
OUT
OUT
135
180
ppm/mA
ppm/mA
70
100
140
ppm/mA
ppm/mA
0°C to 70°C
Thermal Regulation (Note 6)
Dropout Voltage (Note 7)
∆P = 200mW
0.5
2.5
0.9
ppm/mW
V
V
V
– V , ∆V
≤ 0.1%, I
≤ 0.1%, I
= 0
●
●
IN
IN
OUT
OUT
OUT
– V , ∆V
= 10mA
1.3
1.4
V
V
OUT
OUT
OUT
Output Current
Reverse Leakage
Supply Current
Short V
to GND
40
0.5
125
mA
OUT
V
= –15V
●
●
10
µA
IN
175
225
µA
µA
Output Voltage Noise (Note 8)
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
20
20
µV
P-P
µV
RMS
Long-Term Stability of Output Voltage, S8 Pkg (Note 9)
Hysteresis (Note 10)
40
ppm/√kHr
∆T = –40°C to 85°C
∆T = 0°C to 70°C
160
25
ppm
ppm
3
LT1460-5
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the specified temperature
environment to eliminate thermocouple effects on the leads. The test time
is 10 sec. RMS noise is measured with a single highpass filter at 10Hz and
a 2-pole lowpass filter at 1kHz. The resulting output is full wave rectified
and then integrated for a fixed period, making the final reading an average
as opposed to RMS. A correction factor of 1.1 is used to convert from
average to RMS and a second correction of 0.88 is used to correct for the
nonideal bandpass of the filters.
Note 9: Long-term stability typically has a logarithmic characteristic and
therefore, changes after 1000 hours tend to be much smaller than before
that time. Total drift in the second thousand hours is normally less than
one third that of the first thousand hours with a continuing trend toward
reduced drift with time. Significant improvement in long-term drift can be
realized by preconditioning the IC with a 100 hour to 200 hour, 125°C
burn-in. Long-term stability will also be affected by differential stresses
between the IC and the board material created during board assembly. See
PC Board Layout in the Applications Information section.
Note 10: Hysteresis in output voltage is created by package stress that
differs depending on whether the IC was previously at a higher or lower
temperature. Output voltage is always measured at 25°C, but the IC is
cycled to 85°C or –40°C before successive measurements. Hysteresis is
roughly proportional to the square of the temperature change. Hysteresis
is not normally a problem for operational temperature excursions where
the instrument might be stored at high or low temperature.
range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: If the part is stored outside of the specified temperature range, the
output may shift due to hysteresis.
Note 3: ESD (Electrostatic Discharge) sensitive device. Extensive use of
ESD protection devices are used internal to the LT1460, however, high
electrostatic discharge can damage or degrade the device. Use proper ESD
handling precautions.
Note 4: Temperature coefficient is measured by dividing the change in
output voltage by the specified temperature range. Incremental slope is
also measured at 25°C.
Note 5: Load regulation is measured on a pulse basis from no load to the
specified load current. Output changes due to die temperature change
must be taken into account separately.
Note 6: Thermal regulation is caused by die temperature gradients created
by load current or input voltage changes. This effect must be added to
normal line or load regulation. This parameter is not 100% tested.
Note 7: Excludes load regulation errors.
Note 8: Peak-to-peak noise is measured with a single highpass filter at
0.1Hz and a 2-pole lowpass filter at 10Hz. The unit is enclosed in a still-air
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Input-Output Voltage
Differential
Load Regulation, Sourcing
6
5
4
3
2
1
0
100
125°C
25°C
10
1
125°C
25°C
–55°C
–55°C
0.1
0.1
1
10
100
0
0.5
1.0
1.5
2.0
2.5
OUTPUT CURRENT (mA)
INPUT-OUTPUT VOLTAGE (V)
1460-5 G01
1460-5 G02
4
LT1460-5
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
Load Regulation, Sinking
Output Voltage Temperature Drift
Supply Current vs Input Voltage
200
180
160
140
120
100
80
5.004
5.002
5.000
4.998
4.996
4.994
100
90
80
70
60
50
40
30
20
10
0
3 TYPICAL PARTS
125°C
25°C
–55°C
–55°C
25°C
60
125°C
40
20
0
2
4
6
8
10 12 14 16 18 20
0
0
1
2
3
4
5
–50
0
25
50
75
100
–25
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
1460-5 G05
1460-5 G03
1460-5 G04
Power Supply Rejection Ratio
vs Frequency
Line Regulation
Output Impedance vs Frequency
90
80
70
60
50
40
30
20
10
0
5.002
5.000
4.998
4.996
4.994
4.992
1k
100
10
C
= 0
25°C
L
C = 0.1µF
L
125°C
–55°C
1
C = 1µF
L
0.1
100
1k
10k
100k
1M
10
100
1k
10k
100k
1M
0
2
4
6
8
10 12 14 16 18 20
FREQUENCY (Hz)
FREQUENCY (Hz)
INPUT VOLTAGE (V)
1460-5 G07
1460-5 G08
1460-5 G06
Transient Responses
Output Voltage Noise Spectrum
Output Noise 0.1Hz to 10Hz
3000
2000
10
1
0.1
0
1000
0.2ms/DIV
IOUT = 10mA
1460-5 G09
100
10
0
1
2
3
4
5
6
7
8
9
10
100
1k
10k
100k
TIME (SEC)
FREQUENCY (Hz)
1460-5 G10
1460-5 G11
5
LT1460-5
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APPLICATIONS INFORMATION
Longer Battery Life
R
L
V
OUT
V
= 5V
LT1460-5
IN
V
GEN
Series references have a large advantage over older shunt
style references. Shunt references require a resistor from
the power supply to operate. This resistor must be chosen
to supply the maximum current that can ever be
demanded by the circuit being regulated. When the circuit
beingcontrolledisnotoperatingatthismaximumcurrent,
the shunt reference must always sink this current, result-
ing in high dissipation and short battery life.
5V
4V
C
IN
C
L
0.1µF
1460-5 F01
Figure 1. Response Time Test Circuit
5V
4V
VGEN
The LT1460-5 series reference does not require a current
setting resistor and can operate with any supply voltage
from VOUT + 0.9V to 20V. When the circuitry being regu-
lated does not demand current, the LT1460-5 reduces its
dissipation and battery life is extended. If the reference is
not delivering load current it dissipates less than 1mW on
a 7.5V supply, yet the same configuration can deliver
20mA of load current when demanded.
VOUT
RL = 10k
VOUT
RL = 1k
2µs/DIV
1460-5 F02
Figure 2. CL = 0
Capacitive Loads
The LT1460-5 is designed to be stable with capacitive
loads. With no capacitive load, the reference is ideal for
fast settling or applications where PC board space is a
premium. The test circuit shown in Figure 1 is used to
measure the response time for various load currents and
load capacitors. The 1V step from 5V to 4V produces a
current step of 1mA or 100µA for RL = 1k or RL = 10k.
Figure 2 shows the response of the reference with no load
capacitance.
5V
4V
VGEN
R
L = 10k
VOUT
RL = 1k
VOUT
10µs/DIV
1460-5 F03
The reference settles to 5mV (0.1%) in less than 2µs for a
100µA pulse and to 0.1% in 3µs with a 1mA step. When
load capacitance is greater than 0.01µF, the reference
begins to ring due to the pole formed with the output
impedance. Figure 3 shows the response of the reference
to a 1mA and 100µA load with a 0.01µF load capacitor.
Figure 3. CL = 0.01µF
7.5V
0V
VIN
Fast Turn-On
It is recommended to add a 0.1µF or larger input capacitor
to the input pin of the LT1460-5. This helps stability with
large load currents and speeds up turn-on. The LT1460-5
can start in 10µs, but it is important to limit the dv/dt of the
input. Under light load conditions and with a very fast
input, internal nodes overslew and this requires finite
recovery time. Figure 4 shows the result of no bypass
VOUT
0V
20µs/DIV
1460-5 F04
Figure 4. CIN = 0
6
LT1460-5
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APPLICATIONS INFORMATION
capacitance on the input and no output load. In this case
the supply dv/dt is 7.5V in 30ns which causes internal
overslew, and the output does not bias to 5V until 45µs.
Although 45µs is a typical turn-on time, it can be much
longer. A0.1µFinputcapacitorguaranteesthepartalways
starts quickly as shown in Figure 5.
For temperature 0°C to 70°C the maximum ∆T = 70°C,
10ppm
∆V
=
70°C 5V = 3.5mV
(
)( )
OUT
°C
which is 0.07%.
Total worst-case output error is:
0.075% + 0.035% + 0.070% = 0.180%.
7.5V
VIN
Table 1 gives worst-case accuracy for the LT1460AC, CC,
DC, FC, GC from 0°C to 70°C and the LT1460BI, EI, GI
from –40°C to 85°C.
0V
PC Board Layout
VOUT
In 13- to 16-bit systems where initial accuracy and tem-
perature coefficient calibrations have been done, the
mechanicalandthermalstressonaPCboard(inacardcage
forinstance)canshifttheoutputvoltageandmaskthetrue
temperature coefficient of a reference. In addition, the
mechanical stress of being soldered into a PC board can
cause the output voltage to shift from its ideal value.
Surface mount voltage references (MS8 and S8) are the
most susceptible to PC board stress because of the small
amount of plastic used to hold the lead frame.
0V
20µs/DIV
1460-5 F04
Figure 5. CIN = 0.1µF
Output Accuracy
Like all references, either series or shunt, the error budget
of the LT1460-5 is made up of primarily three compo-
nents: initial accuracy, temperature coefficient and load
regulation.Lineregulationisneglectedbecauseittypically
contributesonly30ppm/V,or150µVfora1Vinputchange.
The LT1460-5 typically shifts less than 0.01% when
soldered into a PCB, so this is also neglected (see PC
Board Layout section). The output errors are calculated as
follows for a 100µA load and 0°C to 70°C temperature
range:
A simple way to improve the stress-related shifts is to
mount the reference near the short edge of the PC board,
or in a corner. The board edge acts as a stress boundary,
oraregionwheretheflexureoftheboardisminimum. The
package should always be mounted so that the leads
absorb the stress and not the package. The package is
generally aligned with the leads parallel to the long side of
the PC board as shown in Figure 7a.
LT1460AC
Initial accuracy = 0.075%
For IO = 100µA,
A qualitative technique to evaluate the effect of stress on
voltage references is to solder the part into a PC board and
deformtheboardafixedamountasshowninFigure6. The
flexure #1 represents no displacement, flexure #2 is
concave movement, flexure #3 is relaxation to no dis-
placement and finally, flexure #4 is a convex movement.
3500ppm
∆V
=
0.1mA 5V = 1.75mV
(
)( )
OUT
mA
which is 0.035%.
I
LT1460AC
0.145%
0.180%
0.325%
0.425%
LT1460BI
0.225%
0.260%
0.405%
N/A
LT1460CC
0.205%
0.240%
0.385%
0.485%
LT1460DC
0.240%
0.275%
0.420%
0.520%
LT1460EI
0.375%
0.410%
0.555%
N/A
LT1460FC
0.325%
0.360%
0.505%
0.605%
LT1460GC
0.425%
0.460%
0.605%
0.705%
LT1460GI
0.562%
0.597%
0.742%
N/A
OUT
0
100µA
10mA
20mA
7
LT1460-5
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APPLICATIONS INFORMATION
not a problem for most 10- to 12-bit systems unless the
system has a calibration. In this case, as with temperature
hysteresis, this low level can be important and even more
careful techniques are required.
This motion is repeated for a number of cycles and the
relative output deviation is noted. The result shown in
Figure 7a is for two LT1460S8-5s mounted vertically and
Figure 7b is for two LT1460S8-5s mounted horizontally.
The parts oriented in Figure 7a impart less stress into the
package because stress is absorbed in the leads. Figures
7a and 7b show the deviation to be between 250µV and
500µV and implies a 50ppm and 100ppm change respec-
tively. This corresponds to a 13- to 14-bit system and is
The most effective technique to improve PC board stress
is to cut slots in the board around the reference to serve as
a strain relief. These slots can be cut on three sides of the
reference and the leads can exit on the fourth side. This
“tongue” of PC board material can be oriented in the long
direction of the board to further reduce stress transferred
to the reference.
1
2
3
The results of slotting the PC boards of Figures 7a and
7b are shown in Figures 8a and 8b. In this example the
slots can improve the output shift from about 100ppm to
nearly zero.
4
1460-5 F06
Figure 6. Flexure Numbers
4
2
4
2
LONG DIMENSION
0
LONG DIMENSION
0
–2
–2
0
40
0
10
20
30
40
10
20
30
1460-5 F07b
FLEXURE NUMBER
FLEXURE NUMBER
1460-5 F07a
Figure 7b. Two Typical LT1460S8-5s, Horizontal
Orientation Without Slots
Figure 7a. Two Typical LT1460S8-5s, Vertical
Orientation Without Slots
4
2
4
2
0
0
SLOT
SLOT
–2
–2
0
0
40
40
10
20
30
10
20
30
FLEXURE NUMBER
FLEXURE NUMBER
1460-5 F08a
1460-5 F08b
Figure 8b. Same Two LT1460S8-5s in Figure 7b, but
With Slots
Figure 8a. Same Two LT1460S8-5s in Figure 7a, but
With Slots
8
LT1460-5
W
W
SI PLIFIED SCHE ATIC
V
CC
V
OUT
150k
48k
GND
1460-5 SS
9
LT1460-5
U
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
MS8 Package
8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
0.118 ± 0.004*
(3.00 ± 0.102)
8
7
6
5
0.040 ± 0.006
(1.02 ± 0.15)
0.034 ± 0.004
(0.86 ± 0.102)
0.007
(0.18)
0° – 6° TYP
0.118 ± 0.004**
(3.00 ± 0.102)
SEATING
PLANE
0.192 ± 0.004
(4.88 ± 0.10)
0.012
(0.30)
REF
0.021 ± 0.006
(0.53 ± 0.015)
0.006 ± 0.004
(0.15 ± 0.102)
0.0256
(0.65)
TYP
MSOP (MS8) 1197
1
2
3
4
*
DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH,
PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
0.130 ± 0.005
0.300 – 0.325
0.045 – 0.065
(3.302 ± 0.127)
(1.143 – 1.651)
(7.620 – 8.255)
8
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
(3.175)
MIN
0.020
(0.508)
MIN
+0.035
–0.015
1
2
4
3
0.325
0.100 ± 0.010
(2.540 ± 0.254)
0.018 ± 0.003
(0.457 ± 0.076)
+0.889
8.255
(
)
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)
10
LT1460-5
U
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
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
Z Package
3-Lead Plastic TO-92 (Similar to TO-226)
(LTC DWG # 05-08-1410)
0.180 ± 0.005
(4.572 ± 0.127)
0.060 ± 0.005
0.060 ± 0.010
(1.524 ± 0.254)
(1.524± 0.127)
DIA
0.90
(2.286)
NOM
0.140 ± 0.010
(3.556 ± 0.127)
0.180 ± 0.005
(4.572 ± 0.127)
5°
NOM
10° NOM
0.500
(12.70)
MIN
0.050
(1.270)
MAX
UNCONTROLLED
LEAD DIMENSION
Z3 (TO-92) 0695
0.015 ± 0.002
(0.381 ± 0.051)
0.016 ± 0.003
(0.406 ± 0.076)
0.050 ± 0.005
(1.270 ± 0.127)
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
LT1460-5
U
TYPICAL APPLICATIONS
Boosted Output Current with No Current Limit
Boosted Output Current with Current Limit
+
+
V
≥ (V
+ 1.8V)
V
≥ V
+ 2.8V
OUT
OUT
+
+
D1*
LED
R1
220Ω
R1
220Ω
47µF
47µF
8.2Ω
2N2905
2N2905
IN
IN
5V
100mA
5V
100mA
LT1460-5 OUT
GND
LT1460-5 OUT
GND
+
2µF
SOLID
TANT
+
2µF
SOLID
TANT
GLOWS IN CURRENT LIMIT,
DO NOT OMIT
*
1460-5 TA04
1460-5 TA03
Handling Higher Load Currents
7.5V
40mA
+
47µF
R1*
63Ω
IN
10mA
V
OUT
LT1460-5 OUT
GND
5V
TYPICAL LOAD
CURRENT = 50mA
R
L
*SELECT R1 TO DELIVER 80% OF TYPICAL LOAD CURRENT.
LT1460 WILL THEN SOURCE AS NECESSARY TO MAINTAIN
PROPER OUTPUT. DO NOT REMOVE LOAD AS OUTPUT WILL
BE DRIVEN UNREGULATED HIGH. LINE REGULATION IS
DEGRADED IN THIS APPLICATION
1460-5 TA05
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1236
Precision Low Noise Reference
Precision Bandgap Reference
Precision 5V Reference
0.05% Max, 5ppm/°C Max, SO Package
0.05% Max, 5ppm/°C Max
LT1019
LT1027
0.02%, 2ppm/°C Max
14605fa LT/TP 1298 2K REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1997
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
12
●
●
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com
相关型号：
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Linear
LT1460MHS8-5#TR
LT1460 - Micropower Precision Series Reference Family; Package: SO; Pins: 8; Temperature Range: -40°C to 125°C
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LT1460MHS8-5#TRPBF
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