LT1375 Linear Technology, LT1375 Datasheet - Page 3

• Manufacturer Part Number: LT1375
• Description: 1.5A/ 500kHz Step-Down Switching Regulators
• Manufacturer: Linear Technology

temperature range, otherwise specifications are at T
unless otherwise noted.
PARAMETER
Reference Voltage (Adjustable)
Sense Voltage (Fixed 5V)
Sense Pin Resistance
Reference Voltage Line Regulation
Feedback Input Bias Current
Error Amplifier Voltage Gain
Error Amplifier Transconductance
V
Error Amplifier Source Current
Error Amplifier Sink Current
V
V
Switch Current Limit
V
Switch On Resistance (Note 7)
Maximum Switch Duty Cycle
Switch Frequency
Switch Frequency Line Regulation
Frequency Shifting Threshold on FB Pin
Minimum Input Voltage (Note 3)
Minimum Boost Voltage (Note 4)
Boost Current (Note 5)
Input Supply Current (Note 6)
Output Supply Current (Note 6)
Shutdown Supply Current
Lockout Threshold
ELECTRICAL CHARACTERISTICS
C
C
C
BOOST
Pin to Switch Current Transconductance
Pin Switching Threshold
Pin High Clamp
= V
IN
+ 5V
CONDITIONS
5V ≤ V
5V ≤ V
V
V
V
V
Duty Cycle = 0
V
V
I
V
V
5V ≤ V
5V ≤ V
∆f = 10kHz
I
V
V
V
V
V
(LT1375HV/LT1376HV)
V
SW
SW
SHDN
SHDN
SHDN
SHDN
SHDN
C
FB
C
BOOST
BIAS
BIAS
SHDN
SHDN
C
Open, V
Set to Give 50% Duty Cycle
Open
A
= 2.1V or V
= 1.5A, V
≤ 1.5A
= 25°C. T
= 5V
= 5V
IN
IN
IN
IN
= 1V (Notes 2, 8)
= 1V, ∆I (V
= 1V, V
= 1V, V
= 1V
= 0V, V
= 0V, V
= V
≤ 25V
≤ 30V (LT1375HV/LT1376HV)
≤ 25V
≤ 30V (LT1375HV/LT1376HV)
The
FB
IN
BOOST
+ 5V
= 2.1V or V
FB
FB
IN
IN
SENSE
●
J
≤ 25V, V
≤ 30V, V
= 2.1V or V
= 2.7V or V
C
= 25°C, V
denotes specifications which apply over the full operating
) = ±10µA (Note 8)
= V
= 4.4V
IN
SENSE
SW
SW
+ 5V
SENSE
SENSE
= 0V, V
= 0V, V
IN
= 4.4V,
= 15V, V
= 4.4V
= 5.6V
C
C
Open
Open
0°C ≤ T
C
= 1.5V, boost open, switch open,
I
SW
I
DC ≤ 50%
DC = 80%
SW
J
= 500mA
≤ 125°C
= 1.5A
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
LT1375/LT1376
1500
1100
2.39
2.36
4.94
4.90
1.50
1.35
MIN
200
150
460
440
440
0.8
2.3
86
7
2000
2.42
0.01
0.01
0.05
0.05
2.38
TYP
400
225
500
5.0
0.5
0.9
2.1
0.3
1.0
5.0
0.9
3.2
10
93
12
25
15
20
2
2
2
3
MAX
2700
3000
2.45
2.48
5.06
5.10
0.03
0.03
0.15
0.15
2.46
320
540
560
570
100
1.5
0.4
0.5
1.3
5.5
3.5
1.4
4.0
14
22
35
50
75
75
3
3
UNITS
13756fd
µMho
µMho
3
%/ V
%/ V
%/V
%/V
A/ V
kHz
kHz
kHz
mA
mA
mA
mA
mA
kΩ
µA
µA
µA
µA
µA
µA
%
Ω
Ω
V
V
V
V
V
V
A
A
V
V
V
V