R1230D351A データシートの表示（PDF） - RICOH Co.,Ltd.

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R1230D351A

PWM/VFM step-down DC/DC converter with Synchronous Rectifier

RICOH Co.,Ltd. 

qR1230D001C/D

Symbol

Item

Conditions

VIN Operating Input Voltage

VFB Feedback Voltage

VIN=VCE=VSET+1.5V, VMODE=0V,

IOUT=10mA

∆VFB/ Feedback Voltage

∆T Temperature Coefficient

-40°C ≤ Topt ≤ 85°C

fosc Oscillator Frequency(xx1C) VIN=VCE=VSET+1.5V

fosc Oscillator Frequency(xx1D) VIN=VCE=VSET+1.5V

IDD Supply Current(xx1C)

VIN=VCE=5.5V, VFB=VMODE=0V

IDD Supply Current(xx1D)

VIN=VCE=5.5V, VFB=VMODE=0V

Istb Standby Current

VIN=5.5V, VCE=VFB=0V

RONP ON Resistance of

VIN=5.0V

Pch Transistor

RONN ON Resistance of

VIN=5.0V

Nch Transistor

ILXleak Lx Leakage Current

VIN=5.5V, VCE=0V, VLX=0V/5.5V

IVFB VFB Leakage Current

VIN=5.5V, VCE=0V, VFB=0V/5.5V

ICE CE Input Current

VIN=5.5V, VMODE=0V, VCE=5.5V/0V

VCEH CE "H" Input Voltage

VIN=5.5V, VFB=0V

VCEL CE "L" Input Voltage

VIN=2.4V, VFB=0V

Maxdty Oscillator Maximum Duty Cycle VMODE=0V

VLX Lx Limit Voltage

VIN=VCE=3.0V, VMODE=0V, VFB=0V

Tstart Delay Time by Soft-Start function at no load, VIN=VCE=VSET+1.5V

Tprot Delay Time for protection circuit VIN=VCE=3.6V, VMODE=0V

VUVLO1 UVLO Threshold Voltage

VIN=VCE=2.5V->1.5V, VFB=0V

VUVLO2 UVLO Released Voltage

VIN=VCE=1.5V->2.5V, VFB=0V

IMODE MODE Pin Input Current

VIN=5.5V, VMODE=5.5V/0V, VCE=0V

VMODE MODE ”H” Input Voltage

VIN=VCE=5.5V, VFB=0V

VMODEL MODE ”L” Input Voltage

VIN=VCE=2.4V, VFB=0V

VFMdty VFM Duty Cycle

VIN=VCE=VMODE=2.4V, VFB=0V

MIN.

2.4

0.776

TYP.

0.800

(Topt=25°C)

MAX. Unit

5.5 V

0.824 V

±150

ppm

/°C

425 500 575 kHz

680 800 920 kHz

230 300 µA

250 350 µA

0

5 µA

0.20 0.35 0.60 Ω

0.20 0.45 0.70 Ω

-0.1

0.0

-0.1

0.0

-0.1

0.0

1.5

100

VIN-0.15

0.5

1.8

1.9

-0.1

1.5

VIN-

0.35

1.5

1.5

2.1

2.2

55

65

0.1 µA

0.1 µA

0.1 µA

V

0.3 V

%

VIN- V

0.55

2.5 ms

ms

2.2 V

2.3 V

0.1 µA

V

0.3 V

85 %

Rev. 1.12

-6-

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