ILC6380 データシートの表示（PDF） - Fairchild Semiconductor

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ILC6380

SOT-89 Step-up Dual-Mode Switcher with Shutdown

Fairchild Semiconductor 

ILC6380/81

Electrical Characteristics (continued)

Parameter

Symbol

Conditions

Min. Typ. Max. Units

LX Switch-On Resistance RSWON

LX Leakage Current

ILXL

LX = 10kΩ pull-up to 5V, VOUT = 4.5V

No external components, VOUT = VLX =

10V

1.3 2.3 Ω

1.0 µA

Oscillator Freq.

Maximum Duty Ration

PFM Duty Ration

Stand-by Current

CE “High” Voltage

CE “Low” Voltage

CE “High” Current

FOSC

LX = 10kΩ pull-up to 5V, VOUT = 4.5V, 85 100 115 kHz

Measuring of LX waveform

MAXDTY LX = 10kΩ pull-up to 5V, VOUT = 4.5V, 80

87

92

%

Measuring of LX on-time

PFMDTY VIN = 4.75V, Measuring of LX on-time

5

10 20

%

ISTB

LX = 10kΩ pull-up to 5V, VOUT = 4.5V

0.5 µA

VCEH

LX = 10kΩ pull-up to 5V, VOUT = 4.5V, 0.75

V

Existence of LX Oscillation

VCEL

LX = 10kΩ pull-up to 5V, VOUT = 4.5V,

Stopped LX Oscillation

0.20 V

ICEH

LX = 10kΩ pull-up to 5V, VOUT = VCE =

4.5V

0.25 µA

CE “Low” Current

LX Limit Voltage

Efficiency

ICEL

VLXLMT

EFFI

LX = 10kΩ pull-up to 5V, VOUT = 4.5V,

VCE = 0V

LX = 10kΩ pull-up to 5V, VOUT = 4.5V, 0.7

FOSC > FOSC x 2 (Note 2)

-0.25 µA

1.1 V

85

%

Slow Start Time

TSS

10

msec

Notes:

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 VIN source is represented by “No-Load Input Current (IIN)”

3. Switching frequency is determined by delay time of internal comparator to turn LX “off”, and minimum “on” time as determined

by MAXDTY spec.

Electrical Characteristics ILC6380BP-50

VOUT = 5.0V, FOSC = 100kHz TA = 25°C. Unless otherwise specified, VIN = VOUTX0.6, IOUT = 50mA. See the schematic, figure 4.

Parameter

Output Voltage

Input Voltage

Oscillation Startup

Voltage

Operation Startup

Voltage

Supply Current 1

(Note 1)

Supply Current 2

EXT “High” On-

Resistance

Symbol

VOUT

VIN

VST2

Conditions

Test Circuit Figure 2

VOUT = VST2

VST1 IOUT = 1mA

IDD1

IDD2

REXTH

EXT = 10kΩ pull-up 5V,

VOUT = 4.5V

EXT = 10kΩ pull-up 5V,

VOUT = 5.5V

EXT = 10kΩ pull-up to 5V,

VOUT = 4.5V, VEXT = VOUT - 0.4V

Min.

4.875

Typ.

5.000

Max.

5.125

10

0.8

Units

V

V

V

0.9

V

78.6 131.1 µA

6.9

13.8

µA

30

50

Ω

©2001 Fairchild Semiconductor Corporation

3

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