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R1211N002D Datasheet(PDF) 7 Page - RICOH electronics devices division

Part # R1211N002D
Description  Step-up DC/DC Controller
Download  33 Pages
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

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Rev. 1.10
- 7 -
q
R1211X002C
(Topt=25
°C)
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
VIN
Operating Input Voltage
2.5
6.0
V
VFB
VFB Voltage Tolerance
VIN=3.3V
0.985
1.000
1.015
V
∆VFB/
∆T
VFB Voltage
Temperature Coefficient
-40
°C≤ Topt ≤ 85°C
±150
ppm/
°C
IFB
VFB Input Current
VIN=6V, VFB=0V or 6V
-0.1
0.1
µA
fOSC
Oscillator Frequency
VIN=3.3V, VDLY=VFB=0V
240
300
360
kHz
∆fOSC/
∆T
Oscillator Frequency
Temperature Coefficient
-40
°C≤ Topt ≤ 85°C
±0.6
kHz/
°C
IDD1
Supply Current 1
VIN=6V, VDLY=VFB=0V, EXT at no load
300
500
µA
maxdty Maximum Duty Cycle
VIN=3.3V, EXT “H” side
82
90
94
%
REXTH EXT “H” ON Resistance
VIN=3.3V, IEXT=-20mA
5
10
REXTL
EXT “L” ON Resistance
VIN=3.3V, IEXT=20mA
3
6
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=2.5V, VDLY=0.1V
2.5
5.5
9.0
mA
VDLY
Delay Pin Detector Threshold
VIN=3.3V, VFB=0V, VDLY=0V
→2V
0.95
1.00
1.05
V
TSTART Soft-start Time
VIN=3.3V
5.0
10.5
16.0
ms
VUVLO1 UVLO Detector Threshold VIN=3.3V
→0V, VDLY=VFB=0V
2.1
2.2
2.3
V
VUVLO2 UVLO Detector Hysteresis VIN=0V
→3.3V, VDLY=VFB=0V
0.08
0.13
0.18
V
IAMP1
AMP “H” Output Current
VIN=3.3V, VAMP=1V, VFB=0.9V
0.45
0.90
1.50
mA
IAMP2
AMP “L” Output Current
VIN=3.3V, VAMP=1V, VFB=1.1V
25
50
75
µA


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