XC651A4 datasheet(7/12 Pages) TOREX

Part #	XC651A4

Description	CMOS Low Power Consumption

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Manufacturer	TOREX [Torex Semiconductor]

Direct Link	http://www.torex.co.jp

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1. PFM DC/DC

Ta=25

OC

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CIRCUIT

Output Voltage

VOUT

Ext. components connected

2.438 2.500 2.563

V

1

Operating Voltage

VIN

-

6.0

V

-

Operating Start-Up Voltage

VST

Ext. components connected, IOUT=1mA

-

0.8

0.9

V

1

Operating Hold Voltage

VHLD

Ext. components connected, IOUT=1mA

0.7

-

V

1

Supply Current 1

IDD1

Output Voltage x 0.95 applied to VOUT

-

35.0

56.9

µA

2

Supply Current 2

IDD2

Output Voltage + 0.5V applied to VOUT

-

2.5

5.0

µA

2

Lx Switch ON Resistance

RSWON

Output Voltage x 0.95 applied to VOUT,VLX=0.4V

-

9.1

13.7

Ω

2

Lx Leak Current

ILXL

No ext. components, VOUT=VLX=10V

-

1.0

µA

3

Output Voltage x 0.95 applied to VOUT, Output Voltage applied to LX,

When the oscillator frequency is more than double

EXT H ON Resistance

REXTH

Output Voltage x 0.95 applied to VOUT, VEXT=VOUT - 0.4V

-

140

210

Ω

2

EXT L ON Resistance

REXTL

Output Voltage x 0.95 applied to VOUT, VEXT=0.4V

-

140

210

Ω

2

Duty Ratio 1

DTY1

Output Voltage x 0.95 applied to VOUT, EXT waveform measurement

70

75

80

%

2

Duty Ratio 2

DTY2

Ext. components connected, IOUT=1mA, LX ON time measurement

-62

-

%

1

Max Oscillator Frequency

MAXFOSC Output Voltage x 0.95 applied to VOUT, EXT waveform measurement

85

100

115

kHz

2

Stand-by Current

ISTB

Output Voltage x 0.95 applied to VOUT, VEN=0V

-

0.2

1.0

µA

2

EN H Voltage

VENH

Output Voltage x 0.95 applied to VOUT, EXT oscillation judgement

0.7

-

V

4

EN L Voltage

VENL

Output Voltage x 0.95 applied to VOUT, EXT stopped judgement

-

0.2

V

4

EN H Current

IENH

Output Voltage x 0.95 applied to VOUT, VEN=VOUT

-

0.25

µA

4

EN L Current

IENL

Output Voltage x 0.95 applied to VOUT, VEN=0V

-

- 0.25

µA

4

Efficiency (note 1)

EFFI

Ext. components connected

-70

-

%

1

Conditions : Unless indicated, connect EN to VOUT, VIN=Output Voltage x 0.6, IOUT=10mA

Note : 1. EFFI={ [ (output voltage) x (output current) ] / [ (input voltage) x (input current) ] } x 100

-

Lx Control Voltage

VLXLMT

0.7

1.1

V

2

XC651A

Series

675

10

10S_02XC651A 02.09.12 15:38 ページ 675

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