LT1239 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT1239 Datasheet PDF : 12 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LT1239
Regulator 2 IMON2 Current vs
Output Current
250
VIN2 = 6.8V
VIMON2 = 0V
200
150
100
Regulator 1 IMON Current vs
Output Current
250
VIMON1 = 0V
200
VIN1 = 24V
VIN1 = 5V VOUT1 = 6.8V
150
VOUT1 = 3.75V
VIN1 = 5V
100
VOUT1 = 3.75V
Regulator 1, Comparator Quiescent
Current vs Input Voltage, Pin 14
40
VADJ (PIN 1) = VOUT (PIN 16)
35
30
25
20
15
50
0
0
10
20
30
40
50
OUTPUT CURRENT (mA)
LT1239 • TPC04
50
0
0
10
20
30
40
50
OUTPUT CURRENT (mA)
LT1239 • TPC05
10
VPIN3 = 0V
5
(REGULATOR 1 IN SHUTDOWN)
0
0
5
10
INPUT VOLTAGE, PIN 14 (V)
LT1239 • TPC06
Comparator Output Saturation
Voltage vs Output Current
400
350
300
250
200
150
100
50
0
0 10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
LT1239 • TPC07
Regulator 1 Reverse Output
Current vs Output Voltage
20
18
16
14
12
10
8
6
4
2
VIN1 = 0V
ADJ (PIN 1) = VOUT (PIN 16)
0
0 1 2 3 4 5 6 7 8 9 10
OUTPUT VOLTAGE (V)
LT1239 • TPC08
Regulator 2 Reverse Output
Current vs Output Voltage
20
18
16
14
12
10
8
6
4
2
0
01
23 45 678
OUTPUT VOLTAGE (V)
9 10
LT1239 • TPC09
Shutdown Pin Threshold
2.0
1.8
1.6
(OFF-TO-ON)
1.4
ILOAD = 30mA
1.2
(OFF-TO-ON)
1.0
ILOAD = 1mA
0.8
0.6
(ON-TO-OFF)
0.4
ILOAD = 1mA
0.2
0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
LT1239 • TPC10
Regulator 2, Error Amp, Low-
Battery Detector Quiescent Current
30
25
20
VSHDN2 = OPEN CIRCUIT
15
10
VSHDN2 = 0V
(REGULATOR 2
5
IN SHUTDOWN)
0
0 1 2 3 4 5 6 7 8 9 10
INPUT 2 VOLTAGE, PIN 10 (V)
LT1239 • TPC11
5
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