LT1375HV Linear Technology, LT1375HV Datasheet - Page 5

• Manufacturer Part Number: LT1375HV
• Description: 1.5A/ 500kHz Step-Down Switching Regulators
• Manufacturer: Linear Technology

TYPICAL PERFORMANCE CHARACTERISTICS
150
125
100
500
400
300
200
500
400
300
200
100
75
50
25
8
4
0
0
0
–50
Shutdown Pin Bias Current
Shutdown Supply Current
0
Frequency Foldback
0
CURRENT REQUIRED TO FORCE SHUTDOWN
(FLOWS OUT OF PIN). AFTER SHUTDOWN,
CURRENT DROPS TO A FEW A
–25
AT 2.38V STANDBY THRESHOLD
(CURRENT FLOWS OUT OF PIN)
0.1
0.5
FEEDBACK PIN VOLTAGE (V)
SHUTDOWN VOLTAGE (V)
TEMPERATURE ( C)
V
0
IN
= 25V
0.2
SWITCHING
FREQUENCY
1.0
FEEDBACK PIN
CURRENT
25
50
0.3
V
1.5
IN
= 10V
75
W
0.4
2.0
100
1375/76 G04
1375/76 G07
1375/76 G10
U
125
0.5
2.5
2500
2000
1500
1000
500
2.40
2.36
2.32
0
600
550
500
450
400
0.8
0.4
–50
Error Amplifier Transconductance
0
–50
–50
Standby and Shutdown Thresholds
Switching Frequency
–25
–25
–25
JUNCTION TEMPERATURE ( C)
JUNCTION TEMPERATURE ( C)
JUNCTION TEMPERATURE ( C)
0
0
0
25
SHUTDOWN
25
START-UP
25
50
STANDBY
50
50
75
75
75
100
1375/76 G02
100
100
1375/76 G05
1375/76 G11
125
125
125
3000
2500
2000
1500
1000
500
100
Error Amplifier Transconductance
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
30
25
20
15
10
ERROR AMPLIFIER EQUIVALENT CIRCUIT
V
R
5
0
FB 2 • 10
LOAD
0
LT1376 Minimum Input Voltage
with 5V Output
0
Shutdown Supply Current
MINIMUM VOLTAGE
STANDARD CIRCUIT
MINIMUM INPUT VOLTAGE CAN BE
REDUCED BY ADDING A SMALL EXTERNAL
PNP. SEE APPLICATIONS INFORMATION
V
1k
SHUTDOWN
= 50
–3
VOLTAGE TO
START WITH
TO RUN WITH
GAIN
5
STANDARD
FREQUENCY (Hz)
MINIMUM
LT1375/LT1376
CIRCUIT
PHASE
10k
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
10
= 0V
10
R
200k
OUT
100k
15
100
1M
C
12pF
OUT
1375/76 G03
V
20
C
1375/76 G12
1375/76 G06
10M
200
150
100
50
0
–50
5
1000
25