LT1431IS8#PBF Linear Technology, LT1431IS8#PBF Datasheet - Page 10
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LT1431IS8#PBF
Manufacturer Part Number
LT1431IS8#PBF
Description
IC REF PROGRAMMABLE .4%TOL 8SOIC
Manufacturer
Linear Technology
Datasheet
1.LT1431CS8PBF.pdf
(14 pages)
Specifications of LT1431IS8#PBF
Reference Type
Shunt, Adjustable
Voltage - Output
2.5 ~ 36 V
Tolerance
±0.4%
Temperature Coefficient
50ppm/°C
Number Of Channels
1
Current - Cathode
600µA
Current - Output
100mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Current - Quiescent
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
LT1431
Typical applicaTions
0
GND-S
V
+
LT1431
V
GND-F
IN
COLL
1
1k
10 **
REF
+
5V Power Supply Monitor with ± 500mV
C1
220µF
35V
Window and 50mV Hysteresis
RTN
6k*
5k
OFF
1N4148
+
NOTES: UNLESS OTHERWISE SPECIFIED
1
2
C2
4.7µF
35V
TANT
D1
BAT85
GND-S
470k
R1
SHUTDOWN > 3V
V
+
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
RUN = 0
LT1431
R3
10k
High Efficiency Buck Converter E = 85% to 89%
D4
BAT85
GND-F
COLL
1k
10 **
GND
REF
LT1170
3
V
IN
5
**SETS HYSTERESIS
Q1
VN2222LL
R4
100
*DETERMINES WINDOW SIZE
V
V
V = (R – 5k)(0.5mA)
SW
C
FB
1
R2
1k
2N3904
4k*
5k
C3
0.1µF
4
2
Q2
“HIGH” FOR
OVER VOLTAGE OR
UNDER VOLTAGE
0.047µF
C5
R5
680
0.033µF
D2
BAT85
2N3904
C4
Q3
LT1431 TA13
R8*
24.9k
BOLD LINES INDICATE HIGH CURRENT PATHS
*1% FILM RESISTORS
C1: NICHICON UPL1V221MPH
C3, C4, C5: WIMA MKS-2
C6: NICHICON UPL1C471MPH6
D1, D2: PHILIPS BAT85
D3: MOTOROLA MBR330
L1: COILTRONICS CTX50-3-MP
D3
MBR330
3
4
V
R
+
TOP
GND-S
COMP
50µH 3A
2
5
LT1431CN8
L1
6
5
1
0
4
3
2
0
GND-F
COLL
0.12
1
R
6
ESR
REF
MID
1
Transfer Function
8
7
+
2
C6
470µF
16V
V
3
IN
R6*
23.7k
R7*
24.9k
1431 TA15
5V
2.5A
4
5
LT1431 TA14
6
1431fd