R1211X Datasheet, PDF (7/33 Pages) RICOH electronics devices division – Step-up DC/DC Controller

qR1211X002C
Symbol
Item
VIN Operating Input Voltage
VFB VFB Voltage Tolerance
∆VFB/ VFB Voltage
∆T ^{Temperature Coefficient}
IFB VFB Input Current
fOSC Oscillator Frequency
∆fOSC/ Oscillator Frequency
∆T ^{Temperature Coefficient}
IDD1 Supply Current 1
maxdty Maximum Duty Cycle
REXTH EXT “H” ON Resistance
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
REXTL EXT “L” ON Resistance VIN=3.3V, IEXT=20mA
IDLY1 Delay Pin Charge Current VIN=3.3V, VDLY=VFB=0V
IDLY2 Delay Pin Discharge Current VIN=VFB=2.5V, VDLY=0.1V
VDLY
TSTART
VUVLO1
VUVLO2
IAMP1
IAMP2
Delay Pin Detector Threshold
Soft-start Time
UVLO Detector Threshold
UVLO Detector Hysteresis
AMP “H” Output Current
AMP “L” Output Current
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
-0.1
240
82
2.0
2.5
0.95
5.0
2.1
0.08
0.45
25
TYP.
1.000
±150
(Topt=25°C)
MAX. Unit
6.0
V
1.015
V
ppm/°C
0.1
µA
300 360
kHz
±0.6
kHz/°C
300 500
µA
90
94
%
5
10
Ω
3
6
Ω
4.5 7.0
µA
5.5 9.0
mA
1.00 1.05
V
10.5 16.0
ms
2.2 2.3
V
0.13 0.18
V
0.90 1.50
mA
50
75
µA
Rev. 1.10
-7-