LT1072IN8 Linear Technology, LT1072IN8 Datasheet - Page 5

• Manufacturer Part Number: LT1072IN8
• Description: IC SWTCHNG REG 1.25A HI-EFF 8DIP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Cuk, Flyback, Forward Converterr

Specifications of LT1072IN8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 40 V
• Current - Output: 1.25A
• Frequency - Switching: 40kHz
• Voltage - Input: 3 ~ 60 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL PERFOR A CE CHARACTERISTICS
460
400
500
490
480
470
450
440
430
420
410
250
150
*AVERAGE LT1072 POWER SUPPLY CURRENT IS
400
350
300
200
100
80
70
60
50
40
30
20
10
FOUND BY MULTIPLYING DRIVER CURRENT BY
DUTY CYCLE, THEN ADDING QUIESCENT CURRENT
50
0
0
–50
–75
0
Driver Current* vs Switch Current
Normal/Flyback Mode Threshold
on Feedback Pin
Shutdown Thresholds
FEEDBACK PIN VOLTAGE
(AT THRESHOLD)
CURRENT (OUT OF V
0.2
–25
–50
V
REGULATOR CURRENT DROPS
BELOW 300µA
0.4
–25
C
0
VOLTAGE IS REDUCED UNTIL
SWITCH CURRENT (A)
0.6
TEMPERATURE (°C)
TEMPERATURE (°C)
0
25
0.8
VOLTAGE
25
FEEDBACK PIN CURRENT
(AT THRESHOLD)
50
C
1
PIN)
50
1.2
75
75
1.4
100 125 150
W
100
1.6
LT1072 • TPC13
LT1072 • TPC10
LT1072 • TPC16
125
1.8
U
150
2
–16
–4
–24
–22
–20
–18
–14
–12
–10
–8
–6
–300
–250
–150
0
–400
–350
–200
–100
–50
*UNDER VERY LOW OUTPUT CURRENT CONDITIONS,
200
180
160
140
120
100
DUTY CYCLE FOR MOST CIRCUITS WILL APPROACH
10% OR LESS
15
14
13
12
11
10
80
60
40
20
11
10
9
8
7
6
5
0
9
8
7
6
5
4
3
2
1
–75
0
0
Supply Current vs Input Voltage*
Shutdown Mode Supply Current
Idle Supply Current vs
Temperature
NOTE THAT THIS CURRENT DOES NOT
INCLUDE DRIVER CURRENT, WHICH IS
A FUNCTION OF LOAD CURRENT AND
DUTY CYCLE.
T
V
J
C
–50
10
= 25°C
= 0.6V
10
20
–25
T
V
J
30
INPUT VOLTAGE (V)
C
TEMPERATURE (°C)
20
= 150°C
V
V
0
PIN VOLTAGE (mV)
SUPPLY
SUPPLY
40
25
30
50
– 55°C ≤ T
= 60V
= 3V
50
60 70
90% DUTY CYCLE
50% DUTY CYCLE
10% DUTY CYCLE
0% DUTY CYCLE
40
75 100 125
J
≤ 125°C
80
LT1072 • TPC11
LT1072 • TPC14
50
LT1072 • TPC17
90
100
150
60
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
450
400
350
300
250
200
150
100
160
140
120
100
500
80
40
50
60
20
0
0
0
–75
0
0
Supply Current vs Supply Voltage
(Shutdown Mode)
Error Amplifier Transconductance
Feedback Pin Clamp Voltage
T
J
0.1
–50
= 25°C
10
0.2
–25
FEEDBACK CURRENT (mA)
0.3
SUPPLY VOLTAGE (V)
TEMPERATURE (C°)
20
0
0.4
V
25
C
–55°C
150°C
V
25°C
= 50mV
C
0.5
30
= 0V
50
G
0.6 0.7
m
LT1072
=
40
75 100 125
∆V
∆I
0.8
(V
(FB PIN)
LT1072 • TPC12
LT1072 • TPC15
LT1072 • TPC18
50
C
PIN)
0.9
1072fc
5
150
60
1