R1211N002A_06 Datasheet, PDF (6/40 Pages) RICOH electronics devices division – STEP-UP DC/DC CONTROLLER

R1211x
• R1211x002C
Symbol
VIN
VFB
∆VFB/∆T
IFB
fOSC
∆fOSC/∆T
IDD1
maxdty
REXTH
REXTL
IDLY1
IDLY2
VDLY
TSTART
VUVLO1
VUVLO2
IAMP1
IAMP2
Item
Operating Input Voltage
VFB Voltage Tolerance
VFB Voltage
Temperature Coefficient
VFB Input Current
Oscillator Frequency
Oscillator Frequency
Temperature Coefficient
Supply Current 1
Maximum Duty Cycle
EXT "H" ON Resistance
EXT "L" ON Resistance
Delay Pin Charge Current
Delay Pin Discharge Current
Delay Pin Detector Threshold
Soft-start Time
UVLO Detector Threshold
UVLO Detector Hysteresis
AMP "H" Output Current
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
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
Typ.
1.000
Topt=25°C
Max. Unit
6.0
V
1.015 V
±150
ppm/°C
−0.1
0.1
µA
240 300 360 kHz
±0.6
kHz/°C
300 500 µA
82
90
94
%
5
10
Ω
3
6
Ω
2.0
4.5
7.0
µA
2.5
5.5
9.0
mA
0.95 1.00 1.05
V
5.0 10.5 16.0 ms
2.1
2.2
2.3
V
0.08 0.13 0.18
V
0.45 0.90 1.50 mA
25
50
75
µA
6