LM3524 National Semiconductor, LM3524 Datasheet - Page 4

• Manufacturer Part Number: LM3524
• Description: Regulating Pulse Width Modulator
• Manufacturer: National Semiconductor

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OUTPUT SECTION (EACH OUTPUT)
I
V
V
t
t
SUPPLY CHARACTERISTICS SECTION
V
T
I
CES
R
F
IN
Electrical Characteristics
(Note 1)
CESAT
EO
IN
Note 1: Unless otherwise stated, these specifications apply for T
and LM3524D is 0˚C to 70˚C. V
Note 2: For operation at elevated temperatures, devices in the N package must be derated based on a thermal resistance of 86˚C/W, junction to ambient. Devices
in the M package must be derated at 125˚C/W, junction to ambient.
Note 3: Tested limits are guaranteed and 100% tested in production.
Note 4: Design limits are guaranteed (but not 100% production tested) over the indicated temperature and supply voltage range. These limits are not used to cal-
culate outgoing quality level.
Note 5: Absolute maximum ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its rated operating conditions.
Note 6: Pins 1, 4, 7, 8, 11, and 14 are grounded; Pin 2 = 2V. All other inputs and outputs open.
Note 7: The value of a C
in this test. NPO ceramic or polypropylene can also be used.
Note 8: OSC amplitude is measured open circuit. Available current is limited to 1 mA so care must be exercised to limit capacitive loading of fast pulses.
Typical Performance Characteristics
Switching Transistor
Peak Output Current
vs Temperature
Symbol
Collector Leakage
Current
Saturation
Voltage
Emitter Output
Voltage
Rise Time
Fall Time
Input Voltage
Range
Thermal Shutdown
Temp.
Stand By Current
Parameter
t
capacitor can vary with frequency. Careful selection of this capacitor must be made for high frequency operation. Polystyrene was used
IN
= 20V and f
DS008650-28
V
V
V
I
I
I
V
I
R
R
After Turn-on
(Note 2)
V
E
E
E
E
CE
CE
CE
IN
IN
C
C
= 20 mA
= 200 mA
= 50 mA
= −250 µA
= 2k
= 2k
= 20V,
= 40V (Note 6)
OSC
= 60V
= 55V
= 40V
= 20 kHz.
Conditions
(Continued)
Maximum Average Power
Dissipation (N, M Packages)
A
= T
J
= 25˚C. Boldface numbers apply over the rated temperature range: LM2524D is −40˚ to 85˚C
4
Typ
200
100
160
0.1
0.2
1.5
18
5
(Note 3)
Tested
Limit
LM2524D
0.5
2.2
DS008650-29
50
17
40
10
8
(Note 4)
Design
Limit
Maximum & Minimum
Duty Cycle Threshold
Voltage
Typ
200
100
160
0.1
0.2
1.5
18
5
(Note 3)
Tested
Limit
LM3524D
0.7
2.5
50
17
40
10
8
(Note 4)
Design
Limit
DS008650-30
µA
Units
V
V
V
V
mA
ns
ns
˚C
Max
Max
Min
Min
Max