LM5033MM datasheet(5/17 Pages) NSC

5 / 17 page

Electrical Characteristics (Continued)

Specifications with standard typeface are for T

J = 25˚C, and those with boldface type apply over full Operating Junction

Temperature range.V

IN = 48V, VCC = 10V applied externally, RT = 26.7k

Ω, unless otherwise stated. See (Note 4) and (Note

5).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Oscillator (Pin 9)

Fs1

Internal frequency

Rt = 26.7 k

Ω

175

200

225

kHz

Fs2

Internal frequency

Rt = 8.2 k

Ω

600

kHz

Vsync

Sync threshold

3.2

3.8

t/Sync DC voltage

2.0

PWM Comparator Input (Pin 3)

PWM

Gain from pin 3 to

PWM comparator

0.34

V/V

Maximum duty cycle at

Out1, Out2

See PWM Comparator

text

100 x

(0.5T

S-TD)/TS

Minimum duty cycle at

Out1, Out2

Pin 3 = 0V.

Open Circuit Voltage

4.2

5.2

6.2

Short circuit current

Pin3=0V

0.6

1.1

1.5

Output Drivers (Pin 5, 6)

Deadtime (T

CLoad = 0 @ OUT1,

OUT2. Time measured

from 10% of falling

output to 10% of rising

output.

135

185

Rise Time

Load = 1nF

Fall Time

Load = 1nF

Output High Voltage

Iout = 50 mA (source)

Vcc-0.75

Vcc-0.25

Output Low Voltage

Iout = 100 mA (sink)

0.25

0.75

Max. source current

1.5

Max. sink current

1.5

Thermal Shutdown

Shutdown temperature

165

˚C

Shutdown temperature

hysteresis

˚C

Thermal Resistance

Junction to Ambient

MUB10A Package

200

˚C/W

SDC10A Package

Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device

is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.

Note 2: The maximum allowable power dissipation is a function of the maximum allowed junction temperature (TJ(max)), the ambient temperature (TA), and the

junction-to-ambient thermal resistance (

θJA). The maximum allowable power dissipation can be calculated from PD = (TJ(max) -TA)/ θJA. Excessive power dissipation

will cause the thermal shutdown to activate.

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k

Ω resistor into each pin.

Note 4: Min and Max limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical

Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).

Note 5: Typical specifications represent the most likely parametric norm at 25˚C operation.

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