R1211N002A_06 Datasheet, PDF (4/40 Pages) RICOH electronics devices division – STEP-UP DC/DC CONTROLLER

R1211x
ELECTRICAL CHARACTERISTICS
• R1211x002A
Symbol
VIN
VFB
∆VFB/∆T
IFB
fOSc
∆fOSc/∆T
IDD1
Item
Operating Input Voltage
VFB Voltage Tolerance
VFB Voltage
Temperature Coefficient
VFB Input Current
Oscillator Frequency
Oscillator Frequency
Temperature Coefficient
Supply Current 1
maxdty
REXTH
REXTL
IDLY1
IDLY2
Maximum Duty Cycle
EXT "H" ON Resistance
EXT "L" ON Resistance
Delay Pin Charge Current
Delay Pin Discharge Current
VDLY
Delay Pin Detector Threshold
TSTART Soft-start Time
VUVLO1 UVLO Detector Threshold
VUVLO2 UVLO Detector Hysteresis
IAMP1
AMP "H" Output Current
IAMP2
AMP "L" Output Current
Conditions
VIN=3.3V
−40°C ^<= Topt ^<= 85°C
VIN=6V, VFB=0V or 6V
VIN=3.3V, VDLY=VFB=0V
−40°C ^<= Topt ^<= 85°C
VIN=6V, VDLY=VFB=0V,
EXT at no load
VIN=3.3V,
EXT "H" side
VIN=3.3V, IEXT=−20mA
VIN=3.3V, IEXT=20mA
VIN=3.3V, VDLY=VFB=0V
VIN=VFB=2.5V,
VDLY=0.1V
VIN=3.3V,
VFB=0V,VDLY=0V→2V
VIN=3.3V at 90% of
rising edge
VIN=3.3V→0V,
VDLY=VFB=0V
VIN=0V→3.3V,
VDLY=VFB=0V
VIN=3.3V, VAMP=1V,
VFB=0.9V
VIN=3.3V, VAMP=1V,
VFB=1.1V
Min.
2.5
0.985
−0.1
595
Typ.
1.000
±150
700
±1.4
Topt=25°C
Max. Unit
6.0
V
1.015 V
ppm/°C
0.1
µA
805 kHz
kHz/°C
600 900 µA
82
90
94
%
5
10
Ω
3
6
Ω
2.5
5.0
7.5
µA
2.5
5.5
9.0
mA
0.95 1.00 1.05
V
4.5
9.0 13.5 ms
2.1
2.2
2.3
V
0.08 0.13 0.18
V
0.45 0.90 1.50 mA
30
60
90
µA
4