R1224N592L 데이터 시트보기 (PDF) - RICOH Co.,Ltd.

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R1224N592L

PWM/VFM step-down DC/DC Converter

RICOH Co.,Ltd. 

R1224N

ELECTRICAL CHARACTERISTICS

• R1224Nxx2X (X=E/F/G/H/L/M) except R1224N102X

Topt=25°C

Symbol

Item

VIN

Operating Input Voltage

VOUT Step-down Output Voltage

∆VOUT/ Step-down Output Voltage

∆Topt Temperature Coefficient

fosc Oscillator Frequency

∆fosc/ Oscillator Frequency

∆Topt Temperature Coefficient

IDD1

Supply Current 1

Istandby Standby Current

IEXTH EXT “H” Output Current

IEXTL EXT “L” Output Current

ICEH

ICEL

VCEH

VCEL

Maxdty

VFMdty

CE “H” Input Current

CE “L” Input Current

CE “H” Input Voltage

CE “L” Input Voltage

Oscillator Maximum

Duty Cycle

VFM Duty Cycle

Conditions

Min.

2.3

VIN=VCE=VSET+1.5V, IOUT=−100mA VSET

When VSET <= 1.5V, VIN=VCE=3.0V ×0.98

Typ.

VSET

Max.

18.5

VSET

×1.02

Unit

V

V

−40°C <= Topt <= 85°C

±100

ppm/°C

VIN=VCE=VSET+1.5V, IOUT=−100mA

When VSET <= 1.5, VIN=VCE=3.0V

L/M Version

144 180 216 kHz

E/G Version

240 300 360

F/H Version

400 500 600

−40°C <= Topt <= 85°C

VIN=VCE=VOUT=18.5V

E/F/L/M Version

G version

H version

VIN=18.5V, VCE=0V, VOUT=0V

VIN=8V, VEXT=7.9V, VOUT=8V,

VCE=8V

VIN=8V, VEXT=0.1V, VOUT=0V,

VCE=8V

VIN=VCE=VOUT=18.5V

VIN=VOUT=18.5V, VCE=0V

VIN=8V, VOUT=0V

VIN=8V, VOUT=0V

±0.2

%/°C

20

30

50

60

µA

40 80

0.0 0.5 µA

−17 −10 mA

20 30

mA

0.0 0.5 µA

−0.5 0.0

µA

1.5

V

0.3 V

100

%

E/F/L Version

35

%

VUVLO1

VUVLO2

tstart

tprot

UVLO Voltage

VIN=VCE=2.5V to 1.5V, VOUT=0V

UVLO Release Voltage

VIN=VCE=1.5V to 2.5V, VOUT=0V

Delay Time by Soft-Start function

Delay Time for protection circuit

VIN=VSET+1.5V, IOUT=−10mA

VCE=0V→VSET+1.5V

VIN=VCE=VSET+1.5V

VOUT=VSET+1.5V→0V

1.8 2.0 2.2 V

VUVLO1

+0.1

2.3

V

5

10 20 ms

5

15 30 ms

5

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