LM2524 datasheet(5/22 Pages) NSC

5 / 22 page

Electrical Characteristics (Continued)

(Note 1)

LM2524D

LM3524D

Symbol

Parameter

Conditions

Tested

Design

Tested

Design

Units

Typ

Limit

Typ

Limit

(Note 3)

(Note 4)

(Note 3)

(Note 4)

TC-V

sense

Sense Voltage T.C.

0.2

mV/˚C

Common Mode

−0.7

Min

Voltage Range

5 −V4 = 300 mV

Max

SHUT DOWN SECTION

High Input

(Pin 2) −V(Pin 1)

≥

0.5

Min

Voltage

150 mV

1.5

Max

High Input

(pin 10)

Current

OUTPUT SECTION (EACH OUTPUT)

CES

Collector Emitter

≤ 100 µA

Min

Voltage Breakdown

CES

Collector Leakage

CE = 60V

Current

CE = 55V

0.1

µA

Max

CE = 40V

0.1

CESAT

Saturation

E = 20 mA

0.2

0.5

0.2

0.7

Max

Voltage

E = 200 mA

1.5

2.2

1.5

2.5

Emitter Output

E =50mA

Min

Voltage

Rise Time

IN = 20V,

E = −250 µA

200

C =2k

Fall Time

C = 2k

100

SUPPLY CHARACTERISTICS SECTION

Input Voltage

After Turn-on

Min

Range

Max

Thermal Shutdown

(Note 2)

160

˚C

Temp.

Stand By Current

IN = 40V (Note 6)

Note 1: Unless otherwise stated, these specifications apply for TA =TJ = 25˚C. Boldface numbers apply over the rated temperature range: LM2524D is −40˚ to 85˚C

and LM3524D is 0˚C to 70˚C. VIN = 20V and fOSC = 20 kHz.

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

calculate 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; Pin2=2V. All other inputs and outputs open.

Note 7: The value of a Ct capacitor can vary with frequency. Careful selection of this capacitor must be made for high frequency operation. Polystyrene was used

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.

LM2524 数据表(PDF) 5 Page - National Semiconductor (TI)

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