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