LT1509 データシートの表示（PDF） - Linear Technology
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LT1509 Datasheet PDF : 16 Pages
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LT1509
ELECTRICAL CHARACTERISTICS
Maximum operating voltage (VMAX) = 25V, VCC = 18V, RSET = 15k to GND, CSET = 1nF to GND, IAC = 100µA, ISENSE = 0V, CAOUT = 3.5V,
VAOUT = 5V, OVP = VREF. No load on any outputs unless otherwise noted.
PARAMETER
Current Amplifier (PFC Section)
Current Amp Offset Voltage
ISENSE Bias Current
Current Amp Voltage Gain
Current Amp Unity-Gain Bandwidth
Current Amp Output High
Current Amp Output Low
Current Amp Short-Circuit Current
Input Range, ISENSE, MOUT (Linear Operation)
Reference
Reference Output Voltage
VREF Load Regulation
VREF Line Regulation
VREF Short-Circuit Current
VREF Worst Case
Current Limit
PKLIM Offset Voltage
PKLIM Input Current
PKLIM to GTDR Propagation Delay
Multiplier
Multiplier Output Current
Multiplier Output Current Offset
Multiplier Maximum Output Current
Multiplier Gain Constant (Note 1)
IAC Input Resistance
Oscillator
Oscillator Frequency
CSET Ramp Peak-to-Peak Amplitude
CSET Ramp Valley Voltage
Overvoltage Comparator (PFC Section)
Comparator Trip Voltage Ratio (VTRIP/ VREF)
Hysteresis
OVP Bias Current
OVP Propagation Delay
Gate Drivers (GTDR1 and GTDR2)
Max Output Voltage
Output High
Output Low (Device Unpowered)
Output Low (Device Active)
Peak Output Current
Rise and Fall Time
Max Duty Cycle (PFC)
Max Duty Cycle (PWM) (Note 2)
CONDITIONS
MIN TYP MAX
CAOUT = 0V
q
±1
±4
q
– 25 – 250
80
110
3
q
7.2
8.5
q
1.1
2
q
3
8
17
q – 0.3
1
IREF = 0mA, TA = 25°C
– 5mA < IREF < 0mA
11.5V < VCC < VMAX
VREF = 0V
Load, Line, Temperature
7.39 7.50 7.60
5
q
– 20
5
20
q
12
28
50
q
7.32
7.5
7.68
q
PKLIM = – 0.1V
q
PKLIM Falling from 50mV to – 50mV
IAC = 100µA, RSET = 15k
RAC = 1M from IAC to GND
q
IAC = 450µA, RSET = 15k, VAOUT = 7V, MOUT = 0V q
IAC from 50µA to 1mA
RSET = 15k, CSET = 1000pF
q
RSET = 15k, CSET = 1500pF
q
– 25
25
– 50 – 100
400
– 286
15
35
– 0.05
– 260
0.035
25
– 0.5
– 235
35
85
100 115
58
68
78
4.35 4.7
5.0
1.15
1.3
1.55
OVP = 7.5V
q 1.04 1.05 1.06
0.35
q
0.2
1
100
0mA Load, 18V < VCC
– 200mA Load, 11.5V ≤ VCC ≤ 15V
VCC = 0V, 50mA Load (Sinking)
200mA Load (Sinking)
10mA Load
10nF from GTDR to GND
1nF from GTDR to GND
q
12
15
17.5
q VCC – 3.0
q
0.9
1.5
q
0.5
1.0
q
0.2
0.4
2
25
90
96
44
50
UNITS
mV
nA
dB
MHz
V
V
mA
V
V
mV
mV
mA
V
mV
µA
ns
µA
µA
µA
V –2
kΩ
kHz
kHz
V
V
V
µA
ns
V
V
V
V
V
A
ns
%
%
3
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