ML4818 Просмотр технического описания (PDF) - Micro Linear Corporation
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ML4818 Datasheet PDF : 12 Pages
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ML4818
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which
the device could be permanently damaged. Absolute
maximum ratings are stress ratings only and functional
device operation is not implied.
VCC ........................................................................... 30V
Output Driver Current, Source or Sink
DC ....................................................................... 0.5A
Pulse (0.5 µs) ........................................................ 1.5A
Analog Inputs
(CT, RAMP, ILIM, E/A OUT, INV,
SOFT START, RCRESET) ............................... –0.3V to 6V
CLOCK Output Current (RT) ....................................–5mA
Error Amplifier Output Current (E/A OUT) ................ 5mA
SOFT START Sink Current ..................................... 50 mA
Oscillator Charging Current (CT) .............................–5mA
Junction Temperature ............................................. 150°C
Storage Temperature Range ..................... –65°C to 150°C
Lead Temperature (Soldering 10 Sec) ...................... 260°C
Thermal Resistance (θJA)
Plastic Power DIP ............................................ 40°C/W
Plastic SOIC ..................................................... 80°C/W
OPERATING CONDITIONS
Operating Temperature Range ....................... 0°C to 70°C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VCC = 15V, RT = 12.7kΩ, CT = 250pF, RCLK = 3kΩ, RDELAY = 5kΩ,
TA = Operating Temperature Range (Note 1).
PARAMETER
CONDITIONS
MIN
TYP.
OSCILLATOR
Initial Accuracy
Voltage Stability
Temperature Stability
TA = 25°C
12V < VCC < 25V
410
450
–0.3
0.2
Total Variation
line, temp.
375
CT Discharge Current
Clock Out High
VCT = 2V
4.7
5.5
2.4
3.1
Clock Out Low
0
Ramp Peak
0
4.1
Ramp Valley
Ramp Valley to Peak
1.5
0
2.6
REFERENCE
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Variation
TA = 25°C, IO = 1mA
12V < VCC < 25V
1mA < IO < 10mA
4.95
5.0
–20
2
–20
3
.2
4.85
Output Noise Voltage
Long Term Stability
Short Circuit Current
ERROR AMPLIFIER
10Hz to 10kHz
TJ = 125°C, 1000 hrs
VREF = 0V
50
5
–20
–50
Input Offset Voltage
–40
Input Bias Current
Input Offset Current
–3
0.6
0.1
Open Loop Gain
PSRR
1 < VO < 4V
12 < VCC < 25V
70
75
65
80
MAX
UNITS
525
kHz
%/V
%
525
kHz
6.3
mA
6
V
0.4
V
V
5
V
5
V
5.05
V
20
mV
20
mV
mV/°C
5.15
V
mV
25
mV
mA
30
mV
3
µA
1
µA
dB
dB
3
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