LT1431CN8#TRPBF [Linear]

IC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDIP8, 0.300 INCH, LEAD FREE, PLASTIC, DIP-8, Voltage Reference;
LT1431CN8#TRPBF
型号: LT1431CN8#TRPBF
厂家: Linear    Linear
描述:

IC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDIP8, 0.300 INCH, LEAD FREE, PLASTIC, DIP-8, Voltage Reference

电源电路 参考电压源 光电二极管
文件: 总12页 (文件大小:273K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
LT1431  
Programmable Reference  
U
DESCRIPTIO  
EATURE  
S
F
Guaranteed 0.4% Initial Voltage Tolerance  
0.1Typical Dynamic Output Impedance  
Fast Turn-On  
Sink Current Capability, 1mA to 100mA  
Low Reference Pin Current  
The LT1431 is an adjustable shunt voltage regulator with  
100mA sink capability, 0.4% initial reference voltage tol-  
erance, and 0.3% typical temperature stability. On-chip  
dividerresistorsallowtheLT1431tobeconfiguredasa5V  
shunt regulator, with 1% initial voltage tolerance and  
requiring no additional external components. By adding  
twoexternalresistors,theoutputvoltagemaybesettoany  
value between 2.5V and 36V. The nominal internal current  
limit of 100mA may be decreased by including one exter-  
nal resistor.  
O U  
PPLICATI  
S
A
Linear Regulators  
Adjustable Power Supplies  
Switching Power Supplies  
A simplified three pin version, the LT1431Z/IZ, is available  
for applications as an adjustable reference and is pin  
compatible with the TL431.  
U
O
TYPICAL APPLICATI  
Isolated 5V Regulator  
+
5V  
+
+
R
TOP  
COLL  
COMP  
V
SWITCHING  
REGULATOR  
V
IN  
REF  
+
gm =  
4mA/V  
R
MID  
2.5V  
LT1431  
GND-F  
GND-S  
LT1431 • TA01  
1
LT1431  
W W W  
U
ABSOLUTE AXI U RATI GS  
JunctionTemperature Range  
V+, VCOLLECTOR ....................................................... 36V  
VCOMP, RTOP,RMID,VREF ............................................ 6V  
GND-F to GND-S.................................................... 0.7V  
Ambient Temperature Range  
LT1431M ........................................ 55°C to 150°C  
LT1431I .......................................... 40°C to 100°C  
LT1431C ............................................. 0°C to 100°C  
Storage Temperature Range ................ –65°C to 150°C  
Lead Temperature (Soldering, 10 sec)................ 300°C  
LT1431M ........................................ 55°C to 125°C  
LT1431I ............................................ 40°C to 85°C  
LT1431C .............................................. 0°C TO 70°C  
W
U
/O  
PACKAGE RDER I FOR ATIO  
ORDER PART  
ORDER PART  
NUMBER  
ORDER PART  
NUMBER  
TOP VIEW  
TOP VIEW  
BOTTOM VIEW  
NUMBER  
3
2
1
COLLECTOR  
COMP  
1
2
3
4
REF  
R
COLLECTOR  
COMP  
1
2
3
4
8
7
6
5
REF  
R
8
7
6
5
REF ANODE  
CATHODE  
LT1431MJ8  
LT1431CN8  
LT1431IN8  
LT1431CS8  
LT1431IS8  
LT1431CZ  
LT1431IZ  
MID  
MID  
+
+
V
GND-F  
GND-S  
V
GND-F  
GND-S  
R
R
TOP  
TOP  
PART  
MARKING  
J8 PACKAGE  
N8 PACKAGE  
S8 PACKAGE  
8-LEAD PLASTIC SOIC  
Z PACKAGE  
3-LEAD TO-92 PLASTIC  
8-LEAD CERAMIC DIP 8-LEAD PLASTIC DIP  
TJ MAX = 150°C, θJA = 100°C/W (J)  
TJ MAX = 100°C, θJA = 130°C/W (N)  
TJ MAX = 100°C, θJA = 170°C/W  
TJ MAX = 100°C, θJA = 160°C/W  
LT1431  
LT1431I  
T = 25°C, I = 10mA, unless otherwise specified (Note 1).  
ELECTRICAL CHARACTERISTICS  
A
K
LT1431M/I  
LT1431C  
SYMBOL  
PARAMETER  
CONDITIONS  
MIN TYP MAX MIN TYP MAX UNITS  
V
Reference Voltage  
V
= 5V, I = 2mA, (Note 2)  
2.490 2.500 2.510 2.490 2.500 2.510  
V
V
REF  
KA  
K
2.465  
2.535 2.480  
2.520  
V /T  
Reference Drift  
V
= 5V, I = 2mA  
50  
30  
ppm/°C  
REF  
KA  
K
V /V  
Voltage Ratio, Reference to  
Cathode (Open-Loop Gain)  
I = 2mA, V = 3V to 36V  
K
0.2  
0.5  
0.2  
0.5  
mV/V  
REF  
KA  
KA  
|I  
|
Reference Input Current  
V
= 5V, T = 25°C  
0.2  
0.6  
1.0  
1.5  
0.2  
0.6  
1.0  
1.2  
µA  
µA  
REF  
KA  
A
I
Minimum Operating Current  
Off-State Cathode Current  
V
V
= V  
to 36V  
REF  
1.0  
1.0  
mA  
MIN  
KA  
KA  
|I  
OFF  
|
= 36V, V  
= 0V  
REF  
1
15  
1
2
µA  
µA  
+
|I  
LEAK  
|
Off-State Collector Leakage Current  
V
= 36V, V = 5V, V = 2.4V  
1
5
1
2
µA  
µA  
COLL  
REF  
|Z  
|
Dynamic Impedance  
Collector Current Limit  
5V Reference Output  
V
V
= V , I = 1mA to 100mA, f 1kHz  
0.2  
0.2  
mA  
V
KA  
KA  
KA  
REF  
K
I
= V  
+ 50mV  
80  
360  
100  
260  
LIM  
REF  
Internal Divider Used, I = 2mA  
4.950 5.000 5.050 4.950 5.000 5.050  
K
The  
denotes specifications which apply over the operating temperature  
Note 2: The LT1431 has bias current cancellation which is effective only  
range.  
for V 3V. A slight (2mV) shift in reference voltage occurs when  
KA  
V
KA  
V
KA  
drops below 3V. For this reason, these tests are not performed at  
Note 1: V is the cathode voltage of the LT1431CZ/IZ and corresponds to  
KA  
+
V
of the LT1431CN8/MJ8. I is the cathode current of the LT1431CZ/IZ  
= V  
.
K
REF  
+
and corresponds to I(V ) + I  
of the LT1431CN8/MJ8/IN8.  
COLLECTOR  
2
LT1431  
U W  
TYPICAL PERFOR A CE CHARACTERISTICS  
2.5V Reference IK vs VKA  
VREF and IREF vs V+  
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
2.505  
2.504  
2.503  
2.502  
2.501  
2.500  
2.499  
2.498  
2.497  
2.496  
2.495  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0
I
MIN  
V
REF  
I
REF  
–0.5  
–1.0  
–1.5  
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0  
(V)  
2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5  
+
V
V (V)  
KA  
LT1431 • TPC01  
LT1431 • TPC02  
VREF and IREF vs V+  
VREF and IREF vs Temperature  
2.505  
2.504  
2.503  
2.502  
2.501  
2.500  
2.499  
2.498  
2.497  
2.496  
2.495  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0
2.5025  
2.5000  
2.4975  
2.4950  
1.00  
0.66  
0.33  
0
V
REF  
I
REF  
V
REF  
2.4925  
2.4900  
2.4875  
–0.33  
–0.66  
–1.00  
I
REF  
–0.5  
–1.0  
–1.5  
0
4
8
12 16 20 24 28 32 36 40  
+
50  
TEMPERATURE (°C)  
100 125  
–50 –25  
0
25  
75  
V
(V)  
LT1431 • TPC03  
LT1027 • TPC04  
ILIMIT vs Temperature with  
External Resistor  
COLLECTOR VSAT vs  
Temperature vs Current  
Propagation Delay vs Overdrive  
1.250  
1.125  
1.000  
0.875  
1.20  
1.00  
0.80  
0.60  
150  
135  
0.7  
LIM  
1k  
5V  
3
I
=
AT 25°C  
LIMIT  
OUTPUT  
R
+ 3.6  
1
6
120  
105  
V
REF  
± OVERDRIVE  
LT1431  
I
= 100mA  
COLL  
5
90  
75  
I
= 50mA  
= 20mA  
60  
45  
COLL  
0.750  
0.625  
0.500  
0.40  
0.20  
0
OUTPUT HIGH-TO-LOW  
OUTPUT LOW-TO-HIGH  
I
I
30  
15  
COLL  
= 10mA  
75  
COLL  
50  
0
50  
TEMPERATURE (°C)  
100 125  
–50 –25  
0
25  
75  
100 125  
0
50  
150  
OVERDRIVE (mV)  
200  
250  
–50 –25  
0
25  
100  
TEMPERATURE (°C)  
LT1431 • TPC05  
LT1431 • TPC07  
LT1431 • TPC06  
3
LT1431  
U W  
TYPICAL PERFOR A CE CHARACTERISTICS  
Voltage Gain and Phase  
Transconductance and Phase  
vs Frequency (REF to COLL)  
vs Frequency  
10  
10  
180  
135  
90  
140  
120  
100  
80  
180  
135  
90  
PHASE  
9
8
7
6
5
4
3
2
10  
PHASE  
gm  
10  
10  
10  
10  
10  
10  
10  
A
V
45  
45  
0
60  
0
–45  
–90  
–135  
–180  
40  
–45  
–90  
–135  
–180  
20  
0
–20  
100  
1k  
10k  
100k  
1M  
10M  
100  
1k  
10k  
100k  
1M  
10M  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
LT1431 • TPC09  
LT1431 • TPC08  
Transconductance and Phase vs  
Frequency (Ref to Comp)  
VCOMP vs Temperature vs ICOLL  
Dynamic Impedance vs Frequency  
4
3
10  
3 × 10  
10  
20  
0
1.4  
3.0  
2.5  
2.0  
1.5  
PHASE  
gm  
I
100mA  
K
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
0
–20  
–40  
–60  
–80  
I
I
= 100mA  
= 10mA  
COLL  
COLL  
3
1.0  
0.5  
0
2
3 × 10  
–100  
–120  
–140  
0.1  
100  
1k  
10k  
100k  
1M  
10M  
100  
1k  
10k  
100k  
–50 –25  
25  
50  
75  
100 125  
0
FREQUENCY (Hz)  
FREQUENCY (Hz)  
TEMPERATURE (˚C)  
LT1431 • TPC10  
LT1431 • TPC11  
LT1431 • TPC12  
ICOMP vs VCOMP vs VREF  
Noise vs Frequency  
0.1Hz to 10Hz Noise  
1000  
500  
0
600  
500  
400  
300  
V
V
= 5V  
= 4V  
REF  
REF  
V
V
= 3V  
REF  
REF  
200  
100  
0
= 2.53V  
1
10  
100  
1k  
10k  
100k  
4
6
2.0  
(V)  
3.0 3.5  
0
1
2
3
5
0
0.5  
1.0 1.5  
2.5  
FREQUENCY (Hz)  
TIME (MINUTES)  
V
COMP  
LT1431 • G14  
LT1431 • TPC15  
LT1431 • TPC13  
4
LT1431  
U
U
U
PI FU CTIO S  
COLL (Pin 1): Open collector of the output transistor. The  
maximum pin voltage is 26V. The saturation voltage at  
100mA is approximately 1V.  
RMID (Pin 7): Middle of the on-chip resistive divider string  
between RTOP and GND-S. The pin is tied to REF for self-  
contained 5V operation. It may be left open if unused.  
COMP (Pin 2): Base of the driver for the output transistor.  
This pin allows additional compensation for complex  
feedback systems and shutdown of the regulator. It must  
be left open if unused.  
V+ (Pin 3): Bias voltage for the entire shunt regulator. The  
maximum input voltage is 36V and the minimum to  
operate is equal to VREF (2.5V). The quiescent current is  
typically 0.6mA.  
REF (Pin 8): Control pin of the shunt regulator with a 2.5V  
threshold. If V+ > 3V, input bias current cancellation  
reduces IB to 0.2µA typical.  
COMP, RTOP, RMID, and REF have static discharge protec-  
tion circuits that must not be activated on a continuous  
basis. Therefore, the absolute maximum DC voltage on  
these pins is 6V, well beyond the normal operating condi-  
tions.  
RTOP (Pin 4): Top of the on-chip 5k-5k resistive divider  
that guarantees 1% accuracy of operation as a 5V shunt  
regulator with no external trim. The pin is tied to COLL for  
self-contained 5V operation. It may be left open if unused.  
See note on parasitic diodes below.  
As with all bipolar ICs, the LT1431 contains parasitic  
diodes which must not be forward biased or else anoma-  
lous behavior will result. Pin conditions to be avoided are  
R
TOP below RMID in voltage and any pin below GND-F in  
voltage (except for GND-S).  
GND-S (Pin 5): Ground reference for the on-chip resistive  
divider and shunt regulator circuitry except for the output  
transistor. This pin allows external current limit of the  
output transistor with one resistor between GND-F (force)  
and GND-S (sense).  
The following pin definitions apply to the Z package.  
CATHODE (Pin 1): Corresponds to COLL and V+ tied  
together.  
ANODE (Pin 2): Corresponds to GND-S and GND-F tied  
together.  
GND-F (Pin 6): Emitter of the output transistor and sub-  
strate connection for the die.  
REF (Pin 3): Corresponds to REF.  
W
BLOCK DIAGRA  
+
3
R
V
COMP  
2
COLLECTOR  
1
TOP  
4
5k  
8
+
REF  
gm =  
4mA/V  
7
R
MID  
5k  
2.5V  
5
6
GND-SENSE  
GND-FORCE  
LT1431 • BD01  
5
LT1431  
U U  
W
U
APPLICATIO S I FOR ATIO  
Frequency Compensation  
pole-zero compensation. This can be accomplished with a  
capacitor or series resistor and capacitor between COLL  
and COMP.  
Asashuntregulator, theLT1431isstableforallcapacitive  
loads on the COLL pin. Capacitive loading between 0.01µF  
and18µFcausesreducedphasemarginwithsomeringing  
under transient conditions. Output capacitors should not  
be used arbitrarily because output noise is not necessarily  
reduced.  
The compensation schemes mentioned above use voltage  
feedback to stabilize the circuits. There must be voltage  
gain at the COLL pin for them to be effective, so the COLL  
pin must see a reasonable AC impedance. Capacitive  
loading of the COLL pin reduces the AC impedance,  
voltage gain, and frequency response, thereby decreasing  
the effectiveness of the compensation schemes, but also  
decreasing their necessity.  
Excess capacitance on the REF pin can introduce enough  
phase shift to induce oscillation when configured as a  
reference >2.5V. This can be compensated with capaci-  
tance between COLL and REF (phase lead). More compli-  
cated feedback loops may require shaping of the fre-  
quency response of the LT1431 with dominant pole or  
U
TYPICAL APPLICATIO S  
2.5V Reference  
8-Pin Package  
2.5V Reference  
3-Pin Package  
5V Reference  
R
L
R
R
L
L
V
IN  
V
V
IN  
IN  
2.5V  
2.5V  
5V  
+
+
CATHODE  
REF  
V
COLL  
REF  
V
COLL  
R
REF  
TOP  
LT1431Z  
LT1431  
LT1431  
R
MID  
ANODE  
GND-S  
GND-F  
GND-S  
GND-F  
LT1431 • TA04  
LT1431 • TA03  
LT1431 • TA02  
Programmable Reference with Adjustable  
Current Limit  
Increasing 5V Reference  
R
L
R
L
V
V
IN  
IN  
R1  
R2  
5V + ∆  
V
= 1 +  
V
REF  
OUT  
(
)
+
R
V
COLL  
REF  
R1  
R2  
+
V
COLL  
REF  
R
TOP  
LT1431  
LT1431  
R
MID  
GND-S  
GND-F  
GND-S  
GND-F  
LT1431 • TA05  
R
0.7  
+ 3.6  
LIM  
I
=
AT 25°C  
LIMIT  
= R × (0.5mA) ±25% PROCESS TOLERANCE  
∆ ≤ 500mV  
R
LIM  
LT1431 • TA06  
6
LT1431  
U
TYPICAL APPLICATIO S  
PNP Low Dropout 5V Regulator*  
V
IN  
0.1µF  
20**  
2W  
47Ω  
MJE2955  
1k  
2N2219  
0.015µF  
150Ω  
2
1
COMP  
+
COLL  
3
4
8
7
V
REF  
LT1431  
R
R
MID  
TOP  
GND-S  
5
GND-F  
6
5V  
+
MEASURED DROPOUT VOLTAGE  
330µF  
420mV AT 4A  
190mV AT 2A  
95mV AT 1A  
60mV AT 0.5A  
LT1431 • TA07  
*NO SHORT-CIRCUIT PROTECTION  
**MAY BE INCREASED AT LOWER WATTAGE  
FOR LOWER OUTPUT CURRENTS  
FET Low Dropout 5V Regulator with Current Limit  
12V  
MTP50N05EL  
MTM25N05L  
0.002*  
V
IN  
5.2V  
5V, 2.5A  
47µF  
D
S
2
3
+
+
47µF  
+
G
4
1.5V  
7
5
1N4148  
6
1
COLL  
3
4
8
7
+
V
REF  
Measured Dropout Voltages  
LT1431  
R
R
MID  
I
MTP50N05EL MTM25N05L  
TOP  
LOAD  
2A  
1A  
GND-S  
5
GND-F  
47mV  
22mV  
145mV  
73mV  
37mV  
6
0.5A  
11.5mV  
LT1431 • TA08  
*1.5" #23 SOLID COPPER WIRE  
~0.002Ω → 3A LIMIT  
7
LT1431  
U
TYPICAL APPLICATIO S  
12V to 5V Buck Converter with Foldback Current Limit*  
Buck Converter Efficiency  
80  
PULSE ENGINEERING  
#PE-51515  
V
V
= 9V  
IN  
V
OUT  
V
V
IN  
IN  
LT1089  
HI-SIDE SWITCH  
70  
60  
= 12V  
IN  
100Ω  
0.5W  
MBR735  
LOGIC IN  
GND  
V
= 15V  
IN  
5k  
50  
40  
30  
1500pF  
2
1
COLL  
REF  
COMP  
+
3
4
8
7
V
LT1431  
4
0
1
2
3
5
6
7
8
R
R
MID  
TOP  
I
(A)  
LOAD  
GND-S  
5
GND-F  
6
LT1431 • TA10  
5V, 7A  
3300µF  
+
*CONTACT LTC FOR HIGH EFFICIENCY  
SWITCHING REGULATORS  
LT1431 • TA09  
Fully Loaded Output Ripple vs Filtering  
Isolated 5V to ±15V Flyback Converter  
COILTRONICS  
CTX02-11934  
MUR105  
C*  
LT1172  
LT1072  
+
6, 7  
9
4.5V  
TO 5.5V  
–15V, 70mA  
30mV  
P-P  
40mV  
P-P  
210µF  
C*  
0.47µF  
+
+
15k  
3k  
L*  
100µF  
MUR105  
+
+
4, 5  
6mV  
8mV  
P-P  
P-P  
100µF  
2
+
10  
V
V
OUT  
50µF  
IN  
LT1431 • TA12  
LT1172  
OR  
LT1072  
*L BELL INDUSTRIES J.W. MILLER  
DIVISION 9310-36 10µH, 450mA  
MUR105  
GND  
V
C
15V, 70mA  
1
C*  
1.5k  
3
13.3k  
2.7k  
4N36  
0.68µF  
+
2.4k  
V
1
2
8
MEASURED EFFICIENCY  
COLL  
REF  
LT1172  
LT1072  
LT1071  
67.8% AT 2.2W  
0.1µF  
OUT  
LT1431  
20k  
68.6% AT 2.2W  
OUT  
COMP  
GND-S  
61.1% AT 4.4W  
OUT  
GND-F  
6
5
LT1431 • TA11  
8
LT1431  
U
TYPICAL APPLICATIO S  
5V Power Supply Monitor with ±500mV  
Window and 50mV Hysteresis  
Transfer Function  
6
5
4
3
2
1
0
1k  
6k*  
1N4148  
1k  
4k*  
“HIGH” FOR  
OVER VOLTAGE OR  
UNDER VOLTAGE  
+
+
V
COLL  
REF  
V
COLL  
REF  
LT1431  
GND-S GND-F  
LT1431  
GND-S GND-F  
5k  
5k  
*DETERMINES WINDOW SIZE  
V = (R – 5)(0.5mA)  
**SETS HYSTERESIS  
10**  
10**  
0
2
3
4
5
6
1
V
IN  
LT1431 • TA13  
LT1431 • TA14  
High Efficiency Buck Converter E = 85% to 89%  
1
V
IN  
D1  
BAT85  
C1  
+
BOLD LINE INDICATES HIGH CURRENT PATHS  
* = 1% FILM RESISTORS  
220µF  
35V  
5
C1 = NICHICON-UPL1V221MPH  
C6 = NICHICON-UPL1C471MPH6  
D1, D2 = PHILIPS-BAT85  
4
2
V
IN  
V
SW  
D3 = MOTORALA-MBR330  
L1 = COILTRONICS CTX50-3-MP  
C3, C4, C5 = WIMA-MKS-2  
C5  
0.047µF  
LT1170  
FB  
GND  
V
C
R1  
470k  
3
1
C4  
0.033µF  
R2  
1k  
C3  
0.1µF  
C2  
+
D4  
BAT85  
4.7µF 35V  
C6  
0.12mΩ  
470µF  
TANTALUM  
D3  
MBR330  
ESR  
L1  
50µH 3A  
+
16V  
5V  
2.5A  
D2  
BAT85  
R6*  
23.7k  
Q2  
2N3904  
RUN = 0  
2
1
SHUTDOWN > 3V  
1
2
Q1  
COMP  
COLL  
OFF  
Q3  
2N3904  
3
VN2222LL  
+
8
V
REF  
VR2  
LT1431CN8  
4
7
R
R3  
10k  
R
MID  
GND-F  
TOP  
GND-S  
R7*  
24.9k  
R5  
680Ω  
R8*  
24.9k  
R4  
100Ω  
5
6
RTN  
NOTES: UNLESS OTHERWISE SPECIFIED  
1. ALL RESISTANCES ARE IN , 0.25W, 5%  
2. ALL CAPACITANCES ARE IN µF, 50V, 10%  
3. SHUTDOWN LOGIC STATE MUST BE DEFINED BY A LOGIC GATE OR BY TYING TO GND  
LT1431 • TA15  
9
LT1431  
W
W
SCHE ATIC DIAGRA  
+
V
3
Q5  
4X  
Q7  
3X  
Q13  
Q17  
R1  
35k  
R2  
35k  
Q2  
Q11  
Q12  
Q1  
Q10  
Q3  
COMP  
2
COLLECTOR  
1
Q6  
2X  
C1  
C3  
6pF  
R12  
1k  
22pF  
Q9  
5X  
Q14  
8
R15  
5k  
R17  
1.5k  
REF  
Q20  
2X  
R6  
8.5k  
R11  
11k  
C2  
65pF  
R13  
6.5k  
Q22  
45X  
C4  
1pF  
Q4  
R7  
2.5k  
4
7
R
R
TOP  
R3  
5k  
Q18 Q19  
R9  
2.5k  
R20  
5k  
Q8  
10X  
R16  
Q15  
Q16  
11Ω  
MID  
Q21  
2.5X  
R14  
11Ω  
R4  
5k  
R5  
5k  
R18  
50k  
R8  
600Ω  
R10  
340Ω  
R21  
100k  
R19  
3.6Ω  
5
GND-SENSE  
6
GND-FORCE  
LT1431 • SD01  
10  
LT1431  
U
PACKAGE DESCRIPTIO  
Dimensions in inches (millimeters) unless otherwise noted.  
J8 Package  
8-Lead Ceramic DIP  
0.405  
(10.287)  
MAX  
0.005  
(0.127)  
MIN  
6
5
4
8
7
0.025  
(0.635)  
RAD TYP  
0.220 – 0.310  
(5.588 – 7.874)  
1
2
3
0.200  
(5.080)  
MAX  
0.290 – 0.320  
(7.366 – 8.128)  
0.055  
(1.397)  
MAX  
0.015 – 0.060  
(0.381 – 1.524)  
0.008 – 0.018  
(0.203 – 0.460)  
0° – 15°  
0.038 – 0.068  
(0.965 – 1.727)  
0.385 ± 0.025  
(9.779 ± 0.635)  
0.125  
3.175  
MIN  
0.100 ± 0.010  
0.014 – 0.026  
(2.540 ± 0.254)  
(0.360 – 0.660)  
J8 0392  
N8 Package  
8-Lead Plastic DIP  
0.400  
(10.160)  
MAX  
8
7
6
5
0.250 ± 0.010  
(6.350 ± 0.254)  
1
2
4
3
0.130 ± 0.005  
(3.302 ± 0.127)  
0.300 – 0.320  
(7.620 – 8.128)  
0.045 – 0.065  
(1.143 – 1.651)  
0.065  
(1.651)  
TYP  
0.009 – 0.015  
(0.229 – 0.381)  
0.125  
0.020  
(0.508)  
MIN  
(3.175)  
MIN  
+0.025  
0.045 ± 0.015  
(1.143 ± 0.381)  
0.325  
–0.015  
+0.635  
8.255  
(
)
–0.381  
0.100 ± 0.010  
(2.540 ± 0.254)  
0.018 ± 0.003  
(0.457 ± 0.076)  
N8 0392  
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-  
tation that the interconnection of circuits as described herein will not infringe on existing patent rights.  
11  
LT1431  
U
PACKAGE DESCRIPTIO  
Dimensions in inches (millimeters) unless otherwise noted.  
S8 Package  
8-Lead Plastic SOIC  
0.189 – 0.197  
(4.801 – 5.004)  
7
5
8
6
0.228 – 0.244  
0.150 – 0.157  
(5.791 – 6.197)  
(3.810 – 3.988)  
1
3
4
2
0.010 – 0.020  
(0.254 – 0.508)  
× 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)  
0.016 – 0.050  
0.406 – 1.270  
0.050  
(1.270)  
BSC  
0.014 – 0.019  
(0.355 – 0.483)  
0°– 8° TYP  
SO8 0392  
Z Package  
3-Lead TO-92  
0.060 ± 0.005  
0.180 ± 0.005  
0.060 ± 0.010  
(1.524 ± 0.254)  
(1.524± 0.127)  
DIA  
(4.572 ± 0.127)  
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  
0.050  
0.500  
(12.79)  
MIN  
(1.270)  
MAX  
UNCONTROLLED  
LEAD DIA  
0.020 ± 0.003  
(0.508 ± 0.076)  
Z3 1191  
0.015 ± 0.02  
(0.381 ± 0.051)  
0.016 ± 0.03  
(0.406 ± 0.076)  
0.050 ± 0.005  
(1.270 ± 0.127)  
LT/GP1292 5K REV B  
Linear Technology Corporation  
1630 McCarthy Blvd., Milpitas, CA 95035-7487  
12  
LINEAR TECHNOLOGY CORPORATION 1992  
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977  

相关型号:

LT1431CN8-PBF

Programmable Reference
Linear

LT1431CN8-TRPBF

Programmable Reference
Linear

LT1431CS8

Programmable Reference
Linear

LT1431CS8#PBF

LT1431 - Programmable Reference; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C
Linear

LT1431CS8#TR

LT1431 - Programmable Reference; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C
Linear

LT1431CS8#TRPBF

LT1431 - Programmable Reference; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C
Linear

LT1431CS8-PBF

Programmable Reference
Linear

LT1431CS8-TRPBF

Programmable Reference
Linear

LT1431CZ

Programmable Reference
Linear

LT1431CZ#TRPBF

LT1431 - Programmable Reference; Package: TO-92; Pins: 3; Temperature Range: 0°C to 70°C
Linear

LT1431CZ-PBF

Programmable Reference
Linear

LT1431CZ-TRPBF

Programmable Reference
Linear