ILC6391 데이터 시트보기 (PDF) - Impala Linear Corporation

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ILC6391

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

Impala Linear Corporation 

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

Electrical Characteristics ILC6391

VOUT = 5.0V TA = 25°C. Unless otherwise specified, VIN = VOUT x 0.6, IOUT = 50mA. See schematic, Fig.4

Parameter

Output Voltage

Input Voltage

Operation Startup Voltage

Operation Hold Voltage

Supply Current 1 (See Note 1)

Supply Current 2

EXT “High” On-Resistance

EXT “Low” On-Resistance

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

Efficiency

Symbol

VOUT

VIN

VST

VST

IDD 1

IDD 2

REXTH

REXTL

DUTY 1

DUTY 2

MFO 1

MFO 2

ISTB

VCEH

VCEL

ICEH

ICEL

EFFI

Conditions

Test Circuit of Figure 4

IOUT = 1mA

IOUT = 1mA

VOUT = 4.75V

VOUT = 5.5V

VOUT = 4.75V, VEXT = VOUT-0.4

VOUT = 4.75V, VEXT = 0.4

VOUT = 4.75V, Measuring of

EXT waveform

VIN = VOUT x 0.95, IOUT = 1mA,

Measuring of EXT High State

VOUT = 4.75V, 75% duty

VIN = VOUT x 0.95, 55% duty

VOUT = 4.75V

VOUT = 4.75V, Existence of

EXT Oscillation

VOUT = 4.75V, Disappearance

of EXT Oscillation

VCE = VOUT = 4.75V

VOUT = 4.75V, VCE = 0V

Test Circuit Figure 4

Min

4.875

0.70

70

50

85

153

0.75

Typ

5.000

0.80

31.7

2.4

50

50

75

55

100

180

85

Max

5.125

10

0.9

63.4

4.8

75

75

80

60

115

207

0.5

0.20

0.25

-0.25

Units

V

V

V

V

µA

µA

Ω

Ω

%

%

kHz

kHz

µA

V

V

µA

µA

%

Note:

1. “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.

Impala Linear Corporation

ILC6390 1.1

(408) 574-3939 www.impalalinear.com

Feb 2001 3

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