LT1374IR Linear Technology, LT1374IR Datasheet - Page 5

• Manufacturer Part Number: LT1374IR
• Description: IC SW REG 4.5A ADJ STEP-DWN 7-DD
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT1374IR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 2.42 ~ 21.5 V
• Current - Output: 4.5A
• Frequency - Switching: 500kHz
• Voltage - Input: 5 ~ 25 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (7 leads + tab)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL PERFOR A CE CHARACTERISTICS
500
400
300
200
100
4.5
4.0
3.5
3.0
70
60
50
40
30
20
10
0
0
0
0
Shutdown Supply Current
Frequency Foldback
Maximum Load Current
at V
0
V
OUT
OUT
0.5
= 10V
5
FEEDBACK PIN VOLTAGE (V)
0.1
SHUTDOWN VOLTAGE (V)
= 10V
INPUT VOLTAGE (V)
V
IN
10
SWITCHING
FREQUENCY
1.0
FEEDBACK PIN
CURRENT
= 25V
0.2
1.5
15
V
0.3
IN
W
L = 20µH
L = 10µH
= 10V
2.0
20
L = 5µH
1374 G07
1374 G10
1374 G13
U
0.4
2.5
25
2500
2000
1500
1000
500
0
550
540
530
520
510
500
490
480
470
460
450
–50
4.5
4.0
3.5
3.0
Error Amplifier Transconductance
– 50
Switching Frequency
Maximum Load Current
at V
0
–25
V
OUT
JUNCTION TEMPERATURE (°C)
–25
OUT
= 3.3V
5
0
= 3.3V
0
TEMPERATURE (°C)
INPUT VOLTAGE (V)
25
10
25
50
50
15
L = 10µH
L = 20µH
L = 5µH
75
75
100
20
1374 G08
100
1374 G11
1374 G14
125
125
25
3000
2500
2000
1500
1000
500
100
Error Amplifier Transconductance
ERROR AMPLIFIER EQUIVALENT CIRCUIT
6.4
6.2
6.0
5.8
5.6
5.4
5.2
5.0
4.5
4.0
3.5
3.0
V
R
FB 2 × 10
LOAD
(
1
Minimum Input Voltage
with 5V Output
Maximum Load Current
at V
0
MINIMUM
1k
RUNNING
VOLTAGE
= 50Ω
V
OUT
OUT
–3
GAIN
)
5
= 5V
FREQUENCY (Hz)
= 5V
PHASE
10k
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
10
10
R
200k
OUT
100k
MINIMUM
STARTING
VOLTAGE
15
100
1M
LT1374
C
12pF
OUT
L = 20µH
L = 10µH
V
L = 5µH
1374 G09
C
20
10M
1374 G12
1374 G15
200
150
100
50
0
–50
1374fd
5
1000
25