SOT-89 Step-Up PFM Switcher with Auto-Load Sense

Impala Linear Corporation

2

(408) 574-3939

www.impalalinear.com

Feb 2001

ILC6390 1.1

Parameter

Symbol

Ratings

Units

12

V

12

V

400

mA

Voltage on pin EXT

V

Current on pin EXT

±50

mA

CE Input Voltage

12

V

12

V

Continuous Total Power Dissipation

150

500

mW

Operating Ambient Temperature

-30~+80

°C

Storage Temperature

-40~+125

°C

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Output Voltage

Test Circuit of Figure 1

4.875

5.000

5.125

V

Input Voltage

10

V

Oscillation Startup Voltage

0.80

0.9

V

Oscillation Hold Voltage

0.70

V

NO-Load Input Current

5.3

10.6

µA

Supply Current 1 (See Note 2)

31.7

63.4

µA

Supply Current 2

2.4

4.8

µA

2.8

4.3

Ω

1.0

µA

Duty Ratio 1

DUTY 1

waveform

70

75

80

%

Duty Ratio 2

DUTY 2

on-time

50

55

60

%

Maximum Oscillation Freq. 1

MFO 1

85

100

115

kHz

Maximum Oscillation Freq. 2

MFO 2

153

180

207

kHz

Stand = by Current

0.5

µA

CE “High” Voltage

Oscillation

0.75

V

CE “Low” Voltage

0.20

V

CE “High” Current

0.25

µA

CE “Low” Current

-0.25

µA

(See Note 3)

0.7

1.1

V

Note:

1. The Schottky diode (S.D.), in figure 3 must be type MA735, with Reverse current (IR) < 1.0µA at reverse voltage (VR)=10.0V

2. “Supply Current 1” is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which

results in less average power consumption.

3. The switching frequency is determined by the delay time of the internal comparator and MFO1, which sets the min. on-time

Electrical Characteristics ILC6390