LM2650

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SNVS133C – JUNE 1999 – REVISED APRIL 2013

Electrical Characteristics (continued)

Operating Ratings.

Symbol

Parameter

Conditions

Units

Quiescent Current in Shutdown

(5)

9

μA

mode

20/25

μA(max)

DC On-Resistance

130

m

Ω

Drain-to-Source of the High-Side

170/245

m

Ω(max)

Power Switch

DC On-Resistance

125

m

Ω

Drain-to-Source of the Low-Side

175/245

m

Ω(max)

Power Switch

Leakage current of the High-Side

100

nA

10

Power Switch

μA(max)

Leakage current of the Low-Side

95

μA

210

Power Switch

μA(max)

Active Current Limit of the High-

5.5

A

Side Power Switch

3.5

A(min)

7.5

A(max)

Oscillator Frequency

90

kHz

80/75

kHz(min)

100/105

kHz(max)

Maximum Oscillator Frequency

(6)

315

kHz

270/260

kHz(min)

360/370

kHz(max)

Maximum Duty Cycle

97

%

94/93

%(min)

Minimum Duty Cycle

2.8

%

5

%(min)

Internal Rail Voltage

4.0

V

3.6/3.4

V(min)

4.2/4.3

V(max)

Bootstrap Regulator Voltage

7.5

V

(VRegH)

6.5/6.0

V(min)

Soft Start Current

10

μA

13.5/20.0

μA(max)

Hysteresis of the Sleep

30

mV

Comparator (C2 Figure 16)

10

mV(min)

50

mV(max)

0.95

V(max)

2.10

V(min)

0.9

V(max)

2.0

V(min)

0.50

V(max)

1.45

V(min)

170

°C

(5)

(6)

Pulling 100

μA out of FREQ ADJ simulates adjusting the oscillator frequency with a 12.5 kΩ resistor connected from FREQ ADJ to GND.

The sleep mode cannot be used at switching frequencies above 250 kHz.

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