R1212D Datasheet, PDF (9/41 Pages) RICOH electronics devices division – STEP-UP DC/DC CONTOLLER

R1212D
• R1212D102C
Topt=25°C
Symbol
Item
Conditions
Min. Typ. Max. Unit
VIN
Operating Input Voltage
3.3
5.5 V
VFB
VFB Voltage Tolerance
VIN=3.3V
0.985 1.000 1.015 V
∆VFB/∆VIN VFB Voltage Line Regulation VIN: from 2.2V to 5.5V
3
mV
∆VFB/
∆Topt
VFB Voltage Temperature
Coefficient
−40°C ^<= Topt ^<= 85°C
±150
ppm/
°C
IFB
VFB Input Current
VIN=5.5V, VFB=0V or 5.5V
−0.1
0.1 µA
AV
Open Loop Voltage Gain
VIN=3.3V
100
dB
fT
Unity Gain Frequency Band VIN=3.3V, AV=0
1.0
MHz
fosc Oscillator Frequency
VIN=3.3V, VDLY=VFB=0V
240 300 360 KHz
∆fosc/∆VIN
Oscillator Frequency Line
Regulation
VIN: from 2.2V to 5.5V
25
KHz
∆fosc/ Oscillator Frequency
∆Topt Temperature Coefficient
−40°C ^<= Topt ^<= 85°C
±0.5
KHz/
°C
IDD1
Supply Current 1
VIN=5.5V, VDLY=VFB=0V EXT at no load
400 800 µA
VREFOUT VREFOUT Voltage
VIN=3.3V, IROUT=1mA
1.478 1.500 1.522 V
IOUT
VREFOUT Maximum Output
Current
VIN=3.3V
10
mA
∆VREFOUT/
∆VIN
VREFOUT Line Regulation
VIN: from 2.2V to 5.5V
5
10 mV
∆VREFOUT/
∆IROUT
VREFOUT Load Regulation
VIN=3.3V, IROUT: from 0.1mA to 5.0mA
6
15 mV
Ilim
VREFOUT Short Current Limit
VIN=3.3V, VREFOUT=0V
20
mA
∆VREFOUT/ VREFOUT Voltage Temperature
∆Topt Coefficient
−40°C ^<= Topt ^<= 85°C
±150
ppm/
°C
REXTH EXT "H" ON Resistance
VIN=3.3V, IEXT=−50mA
2.5 6.0 Ω
REXTL EXT "L" ON Resistance
VIN=3.3V, IEXT=50mA
1.5 4.0 Ω
tr
EXT Rising Time
VIN=3.3V, CL=1000pF
12
ns
tf
EXT Falling Time
VIN=3.3V, CL=1000pF
8
ns
IDLY1
DELAY Pin Charge Current
VIN=3.3V, VDLY=VFB=0V
2.0 4.5 7.0 µA
IDLY2
DELAY Pin Discharge Current VIN=VFB=2.2V, VDLY=0.1V
0.08 0.20 0.36 mA
VDLY
DELAY Pin Detector Threshold VIN=3.3V, VFB=0V, VDLY=0V to 2V
0.95 1.00 1.05 V
VUVLO1 UVLO Detector Threshold
VIN=3.3V to 0V, VDLY=VFB=0V
2.6 2.8 3.0 V
VUVLO2 UVLO Released Voltage
VIN=0V to 3.3V, VDLY=VFB=0V
VUVLO1
+ 0.25
3.30
V
VDTC0 Duty=0% DTC Pin Voltage
VIN=3.3V
0.05 0.18 0.25 V
VDTC20 Duty=20% DTC Pin Voltage VIN=3.3V
0.3
V
VDTC80 Duty=80% DTC Pin Voltage VIN=3.3V
0.75
V
Maxduty Maximum Duty Cycle
VIN=3.3V
85.5 91.5 97.5 %
IAMPH AMP "H" Output Current
VIN=3.3V, VAMP=1.0V, VFB=0.9V
0.5 1.0 1.8 mA
IAMPL AMP "L" Output Current
VIN=3.3V, VAMP=1.0V, VFB=1.1V
50 90 150 µA
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