lt1941 Linear Technology Corporation, lt1941 Datasheet - Page 3

• Manufacturer Part Number: lt1941
• Description: Triple Monolithic Switching Regulator
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
The
V
PARAMETER
12GOOD Voltage Output Low
12GOOD Leakage
PGOOD Voltage Output Low
PGOOD Pin Leakage
3A Step-Down
FB1 Voltage
FB1 Pin Bias Current
PGOOD1 Threshold Offset
Frequency Shift Threshold on FB1
Error Amplifier Transconductance
Error Amplifier Voltage Gain
V
V
Switch 1 Current Limit (Note 3)
Switch 1 V
BOOST1 Pin Current
Switch 1 Leakage Current
Minimum Boost Voltage Above Switch (Note 4)
Maximum Duty Cycle
2A Step-Down
FB2 Voltage
FB2 Pin Bias Current
PGOOD2 Threshold Offset
Frequency Shift Threshold on FB2
Error Amplifier Transconductance
Error Amplifier Voltage Gain
V
V
Switch 2 Current Limit (Note 3)
Switch 2 V
BOOST2 Pin Current
Switch 2 Leakage Current
Minimum Boost Voltage Above Switch (Note 4)
Maximum Duty Cycle
1.5A Inverting/Boost
FB3 Voltage
FB3 Pin Bias Current
NFB Voltage
NFB Pin Bias Current
IN
C
C1
C
C2
Switching Threshold
Switching Threshold
, V
to Switch Current Gain
to Switch Current Gain
●
BIAS1
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
CESAT
CESAT
, V
BIAS2
(Note 7)
(Note 7)
= 5V, V
BOOST1
, V
BOOST2
= 8V, unless otherwise noted. (Note 2)
CONDITIONS
I
V
I
V
V
V
I
I
V
V
I
I
12GOOD
PGOOD
SW
SW
SW
SW
12GOOD
PGOOD
FB
IN
FB
IN
= 12V, V
= 12V, V
Rising
Rising
= 2.5A
= 2.5A
= 1.5A
= 1.5A
= 200µA
= 2V
= 125µA
= 2V, V
BOOST1
BOOST1
IN
= 12V
, V
, V
BOOST2
BOOST2
= 15V
= 15V
●
●
●
●
●
●
●
●
●
●
●
●
1.23
1.22
MIN
–15
618
613
618
613
78
78
3
2
1700
1700
0.35
0.01
0.35
1.25
TYP
628
500
400
628
500
450
0.01
800
0.2
0.2
0.9
4.3
1.8
0.9
3.6
2.9
1.8
10
10
50
54
40
88
50
54
26
88
60
5
0
1400
MAX
1.27
1.27
400
400
638
638
500
600
638
638
500
600
500
0.4
0.4
2.5
4.1
2.5
60
10
40
10
15
6
LT1941
A
= 25°C.
µMhos
µMhos
UNITS
1941fa
3
V/V
A/V
V/V
A/V
mV
mV
mV
mV
mA
mV
mV
mV
mV
mA
mV
nA
nA
nA
µA
nA
µA
nA
nA
%
%
V
V
V
V
A
V
V
V
A
V
V
V