R1232D データシートの表示（PDF） - RICOH Co.,Ltd.

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R1232D

PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER

RICOH Co.,Ltd. 

R1232D

• R1232DxxxB/D

Symbol

Item

Conditions

VIN

Operating Input Voltage

VOUT

Step-down Output Voltage

VFB

Feedback Voltage

∆VOUT/∆Topt

Step-down Output Voltage

Temperature Coefficient

fosc Oscillator Frequency

IDD

Supply Current

VIN=VCE=5.0V,IOUT=10mA

VIN=VCE=5.0V,IOUT=10mA

−40°C <= Topt <= 85°C

VIN=VCE=VSET+1.5V

VIN=VCE=5.5V, VOUT=5.5V

Istandby Standby Current

VCE=VOUT=0V, VIN=5.5V

ILXleak

LX Leakage Current

VIN=5.5V, VCE=0V,

VLX=0V/5.5V

RONP

ON Resistance of Pch Transistor VIN=5.0V, ILX=200mA

RONN

ON Resistance of Nch Transistor VIN=5.0V, ILX=200mA

Maxduty Oscillator Maximum Duty Cycle

tstart Soft-start Time

VIN=VCE=5.0V, at no load

tprot Protection Delay Time

VIN=VCE=5.0V

ILXlimit LX Current Limit

VIN=VCE=5.0V

VUVLO1 UVLO Detector Threshold

VIN=VCE=2.6V -> 1.5V

VUVLO2 UVLO Released Voltage

VIN=VCE =1.5V -> 2.6V

ICE

IVOUT

VCEH

VCEL

VTESTL

CE Input Current

VOUT Leakage Current

CE "H" Input Voltage

CE "L" Input Voltage

TEST "L" Input Voltage

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

VIN=5.5V, VCE=0V,

VOUT=5.5V/0V

VIN=5.5V

VIN=3.0V

VIN=3.0V

Topt=25°C

Min. Typ. Max. Unit

2.6

5.5

V

×0.980

×1.020 V

0.784 0.800 0.816 V

±150

ppm/

°C

1.91 2.25 2.58 MHz

170 240 310 µA

0.0 5.0 µA

−5.0 0.0 5.0 µA

0.20 0.35 Ω

0.20 0.35 Ω

100

%

0.15 0.4 0.7 ms

0.1 2.0 10.0 ms

1.0 1.4

A

2.10 2.25 2.40 V

2.20

VUVLO1

+0.10

2.50

V

−0.1 0.0 0.1 µA

−0.1 0.0

0.1

µA

1.5

V

0.3

V

0.3

V

6

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