LT1431IN8 Linear Technology, LT1431IN8 Datasheet - Page 10

• Manufacturer Part Number: LT1431IN8
• Description: IC REF PROGRAMMABLE .4%TOL 8-DIP
• Manufacturer: Linear Technology

Specifications of LT1431IN8

• 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: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Input: -
• Current - Quiescent: -

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