LT1577CS-ADJ/ADJ View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT1577CS-ADJ/ADJ
Linear Technology
LT1577CS-ADJ/ADJ Datasheet PDF : 20 Pages
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LT1575/LT1577
ELECTRICAL CHARACTERISTICS
TA = 25°C, VIN = 12V, GATE = 6V, IPOS = INEG = 5V, SHDN = 0.75V unless otherwise noted.
SYMBOL
IQ
VFB
VOUT
PARAMETER
Supply Current
LT1575 Reference Voltage
LT1575-1.5 Output Voltage
LT1575-2.8 Output Voltage
LT1575-3.3 Output Voltage
LT1575-3.5 Output Voltage
LT1575-5 Output Voltage
Line Regulation
IFB
FB Input Bias Current
IOUT
OUT Divider Current
AVOL
LT1575 Large-Signal Voltage Gain
LT1575-1.5 Large-Signal Voltage Gain
LT1575-2.8 Large-Signal Voltage Gain
LT1575-3.3 Large-Signal Voltage Gain
LT1575-3.5 Large-Signal Voltage Gain
LT1575-5 Large-Signal Voltage Gain
VOL
GATE Output Swing Low (Note 3)
VOH
GATE Output Swing High
IPOS + INEG Supply Current
Current Limit Threshold Voltage
Current Limit Threshold Voltage
Line Regulation
SHDN Sink Current
SHDN Source Current
SHDN Low Clamp Voltage
SHDN High Clamp Voltage
SHDN Threshold Voltage
SHDN Threshold Hysteresis
CONDITIONS
10V ≤ VIN ≤ 20V
FB = VFB
OUT = VOUT
VGATE = 3V to 10V
VGATE = 3V to 10V
VGATE = 3V to 10V
VGATE = 3V to 10V
VGATE = 3V to 10V
VGATE = 3V to 10V
IGATE = 0mA
IGATE = 0mA
3V ≤ IPOS ≤ 20V
3V ≤ IPOS ≤ 20V
Current Flows Into Pin
Current Flows Out of Pin
MIN
q
5
– 0.6
q
– 1.0
– 0.6
q
– 1.0
– 0.6
q
– 1.0
– 0.6
q
– 1.0
– 0.6
q
– 1.0
– 0.6
q
– 1.0
q
q
q
0.5
q
69
q
67
q
60
q
60
q
60
q
56
q
q VIN – 1.6
q
0.3
42
q
37
q
q
2.5
q
–8
q
q
1.50
q
1.18
q
50
TYP
12
1.210
1.210
1.500
1.500
2.800
2.800
3.300
3.300
3.500
3.500
5.000
5.000
0.01
– 0.6
1.0
84
82
76
75
74
71
2.5
VIN – 1
0.625
50
50
– 0.20
5.0
– 15
0.1
1.85
1.21
100
MAX
19
0.6
1.0
0.6
1.0
0.6
1.0
0.6
1.0
0.6
1.0
0.6
1.0
0.03
– 4.0
1.5
3.0
1.0
58
63
– 0.50
8.0
– 23
0.25
2.20
1.240
150
UNITS
mA
%
%
%
%
%
%
%
%
%
%
%
%
%/V
µA
mA
dB
dB
dB
dB
dB
dB
V
V
mA
mV
mV
%/V
µA
µA
V
V
V
mV
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LT1575CN8: TJ = TA + (PD • 100°CW)
LT1575CS8: TJ = TA + (PD • 130°CW)
LT1577CS: TJ = TA + (PD • 100°CW)
Because the LT1577 consists of two regulators in the package, the total
LT1577 power dissipation must be used for its junction temperature
calculation. The total LT1577 PD = PD (Regulator 1) + PD (Regulator 2).
Note 3: The VGS(th) of the external MOSFET must be greater than
3V – VOUT.
3
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