V

type apply for T

Operating Ratings.

Symbol

Parameter

Conditions

Typ (Note 5)

Limit (Note 6)

Units

D

MIN

Minimum Duty Cycle

V

F

2.8

5

%

%(min)

V

DD

Internal Rail Voltage

I

4.0

3.6/3.4

4.2/4.3

V

V(min)

V(max)

V

BOOT

Bootstrap Regulator Voltage

(VRegH)

I

7.5

6.5/6.0

V

V(min)

I

SS

Soft Start Current

10

13.5/20.0

µA

µA(max)

V

HYST

Hysteresis of the Sleep

Comparator (C2

Figure 2)

V

30

10

50

mV

mV(min)

mV(max)

V

0.95

V(max)

V

2.10

V(min)

V

0.9

V(max)

V

2.0

V(min)

V

0.50

V(max)

V

1.45

V(min)

T

SD

T

170

˚C

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

correctly. Operating ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical

Characteristics.

junction temperature, and

the safe dissipation of more power. See Application Notes on thermal management. The LM2650 actively limits its junction temperature to about 170˚C.

Note 3: For detailed information on soldering plastic small-outline packages, refer to the Packaging Databook published by National Semiconductor Corporation.

Note 4: ESD is applied using the human-body model, a 100pF capacitor discharged through a 1.5k

Ω resistor.

Note 9: Pulling 100µA out of FREQ ADJ simulates adjusting the oscillator frequency with a 12.5 k

Ω resistor connected from FREQ ADJ to GND. The sleep mode

cannot be used at switching frequencies above 250 kHz.

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