ILC6390 데이터 시트보기 (PDF) - Fairchild Semiconductor

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ILC6390

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

Fairchild Semiconductor 

ILC6390/91

Electrical Characteristics ILC6390

VOUT = 5.0V TA = 25°C. Unless otherwise specified, VIN = VOUT x 0.6, IOUT = 50mA. See schematic, fig. 1 & 2.

Parameter

Output Voltage

Input Voltage

Oscillation Startup Voltage

Oscillation Hold Voltage

NO-Load Input Current

Supply Current 1 (Note 2)

Supply Current 2

LX Switch-On Resistance

LX Leakage Current

Duty Ratio 1

Duty Ratio 2

Maximum Oscillation Freq. 1

Maximum Oscillation Freq. 2

Stand = by Current

CE “High” Voltage

CE “Low” Voltage

CE “High” Current

CE “Low” Current

LX Limit Voltage

Efficiency

Symbol

VOUT

VIN

VST

VHLD

IIN

IDD1

RSWON

ILXL

DUTY 1

DUTY 2

MFO 1

MFO 2

ISTB

VCEH

VCEL

ICEH

ICEL

VLXLMT

EFFI

Conditions

Test Circuit Figures 1 & 2

IOUT = 1mA

IOUT = 1mA

IOUT = 0mA (Note1)

VOUT = 4.75V

VOUT = 5.5V

VOUT = 4.75V, VLX = 0.4

No external components, VOUT = VLX

= 10V

VOUT = 4.75V, Measuring of LX

waveform

VOUT = 4.75V, Measuring of LX on-

time

VOUT = 4.75V, 75% duty

VOUT = 4.75V, 55% duty

VOUT = 4.75V

VOUT = 4.75V, Existence of LX

Oscillation

VOUT = 4.75V, Disappearance of LX

Oscillation

VCE = VOUT x 0.95

VOUT = 4.75V, VCE = 0V

VOUT = 4.75V, fOSC > MFO x 2

(Note 3)

Test Circuit Figures 1 & 2

Min.

4.875

0.70

70

50

85

153

0.75

0.7

Typ.

5.000

0.80

5.3

31.7

2.4

2.8

75

55

100

180

85

Max.

5.125

10

0.9

10.6

63.4

4.8

4.3

1.0

80

60

115

207

0.5

0.20

0.25

-0.25

1.1

Units

V

V

V

V

µA

µA

µA

Ω

µA

%

%

kHz

kHz

µA

V

V

µA

µA

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. The current that is actually provided by external V IN

source is represented by “No-Load Input Current.”

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

©2001 Fairchild Semiconductor Corporation

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