LT1943 Просмотр технического описания (PDF) - Linear Technology
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LT1943 Datasheet PDF : 20 Pages
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LT1943
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, RUN-SS, SS-234 = 2.5V unless otherwise noted.
PARAMETER
SWITCH 1 (2.4A BUCK)
FB1 Voltage
FB1 Voltage Line Regulation
FB1 Pin Bias Current
Error Amplifier 1 Voltage Gain
Error Amplifier 1 Transconductance
Switch 1 Current Limit
Switch 1 VCESAT
Switch 1 Leakage Current
Minimum BOOST Voltage Above SW1 Pin
BOOST Pin Current
Maximum Duty Cycle (SW1)
SWITCH 2 (2.6A BOOST)
FB2 Voltage
FB2 Voltage Line Regulation
FB2 Pin Bias Current
Error Amplifier 2 Voltage Gain
Error Amplifier 2 Transconductance
Switch 2 Current Limit
Switch 2 VCESAT
Switch 2 Leakage Current
BIAS Pin Current
Maximum Duty Cycle (SW2)
SWITCH 3 (350mA BOOST)
FB3 Voltage
FB3 Voltage Line Regulation
FB3 Pin Bias Current
Error Amplifier 3 Voltage Gain
Error Amplifier 3 Transconductance
Switch 3 Current Limit
Switch 3 VCESAT
Switch 3 Leakage Current
BIAS Pin Current
Maximum Duty Cycle (SW3)
Schottky Diode Drop
CONDITIONS
4.5V < VIN < 22V
(Note 4)
∆I = 5µA
Duty Cycle = 35% (Note 6)
ISW = 2A
FB1 = 1.5V
ISW = 1.5A (Note 7)
ISW = 1.5A
4.5V < VIN < 22V
(Note 4)
∆I = 5µA
ISW2 = 2A
FB2 = 1.5V
ISW2 = 2A
4.5V < VIN < 22V
(Note 4)
∆I = 5µA
ISW3 = 0.2A
FB3 = 1.5V
ISW3 = 0.2A
I = 170mA
MIN TYP MAX UNITS
1.23 1.25 1.27
V
● 1.22
1.27
V
0.01 0.03
%/V
●
100 600
nA
200
V/V
450
µmhos
● 2.4
3.2
4.3
A
310 470
mV
0.1
10
µA
1.8
2.5
V
30
50
mA
● 82
92
%
1.23 1.25 1.27
V
● 1.22
1.27
V
0.01 0.03
%/V
●
220 1000
nA
200
V/V
450
µmhos
● 2.6
3.8
4.9
A
360 540
mV
0.1
1
µA
45
mA
● 85
92
%
1.23 1.25 1.27
V
● 1.22
1.27
V
0.01 0.03
%/V
●
100 600
nA
200
V/V
450
µmhos
● 0.35
0.5
0.7
A
180 280
mV
0.1
1
µA
14
mA
84
88
%
● 83
%
700
mV
1943fa
3
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