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R1111N251A Datasheet Preview

R1111N251A Datasheet

LOW NOISE 150mA LDO REGULATOR

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R1111N SERIES
LOW NOISE 150mA LDO REGULATOR
NO.EA-057-120206
OUTLINE
The R1111N Series are CMOS-based voltage regulator ICs with high output voltage accuracy, extremely low
supply current, low ON-resistance, and high Ripple Rejection. Each of these voltage regulator ICs consists of a
voltage reference unit, an error amplifier, resistors, a current limit circuit, and a chip enable circuit.
These ICs perform with low dropout voltage and a chip enable function. The line transient response and load
transient response of the R1111N Series are excellent, thus these ICs are very suitable for the power supply for
hand-held communication equipment.
The output voltage of these ICs is fixed with high accuracy. Since the package for these ICs is SOT-23-5
(Mini-mold) package , high density mounting of the ICs on boards is possible.
FEATURES
Supply Current ............................................................Typ. 35μA
Standby Mode .............................................................Typ. 0.1μA
Dropout Voltage .......................................................... Typ. 0.2V (IOUT=100mA)
Ripple Rejection..........................................................Typ. 70dB(f=1kHz)
Output Voltage ............................................................1.5V to 5.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
Output Voltage Accuracy.............................................±2.0%
Low Temperature-Drift Coefficient of Output Voltage..Typ. ±100ppm/°C
Line Regulation ...........................................................Typ. 0.05%/V
Package ....................................................................SOT-23-5
Built-in chip enable circuit ( 2 types; A: active “L”, B: active “H”)
Built-in Fold Back Protection Circuit .......................... Typ. 50mA (Current at short mode)
Pin-out.........................................................................Similar to the LP2980
APPLICATIONS
Power source for cellular phones such as GSM, CDMA and various kinds of PCSs.
Power source for electrical appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipment.
1




RICOH

R1111N251A Datasheet Preview

R1111N251A Datasheet

LOW NOISE 150mA LDO REGULATOR

No Preview Available !

R1111N
BLOCK DIAGRAM
R1111Nxx1A
1
VDD
CE
3
Vref
Current Limit
5
VOUT
1
VDD
GND
2
CE
3
R1111Nxx1B
Vref
Current Limit
5
VOUT
GND
2
SELECTION GUIDE
The output voltage, the active type for the ICs can be selected at the user's request.
Product Name
Package
Quantity per Reel
Pb Free
Halogen Free
R1111Nxx1-TR-FE
SOT-23-5
3,000 pcs
Yes
xx: The output voltage can be designated in the range from 1.5V(15) to 5.0V(50) in 0.1V steps.
(For other voltages, please refer to MARK INFORMATIONS.)
Yes
: Designation of Active Type
(A) "L" active
(B) "H" active
2


Part Number R1111N251A
Description LOW NOISE 150mA LDO REGULATOR
Maker RICOH
Total Page 18 Pages
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