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R1121N301B-TR Datasheet

  • R1121N301B-TR

  • LOW NOISE 150mA LDO REGULATOR

  • 16頁

  • RICOH

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鈥?9.7.13
LOW NOISE 150mA LDO REGULATOR
R1121N SERIES
s
OUTLINE
The R1121N Series are voltage regulator ICs with high output voltage accuracy, extremely low supply current, low ON-
resistance and high ripple rejection by CMOS process. 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 R1121N 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 are SOT-23-5 (Mini-mold) package, high density mounting of the ICs on boards is possible.









s
FEATURES
Ultra-Low Supply Current.................................................TYP. 35碌A
Standby Mode ...................................................................TYP. 0.1碌A
Low Dropout Voltage ........................................................TYP. 0.2V (I
OUT
= 100mA)
High Ripple Rejection .......................................................TYP. 70db (f = 1kHz)
Low Temperature-Drift Coefficient of Output Voltage .....TYP.
鹵100ppm/擄C
Excellent Line Regulation .................................................TYP. 0.05%/V
High Accuracy Output Voltage..........................................鹵2.0%
Small Package ..................................................................SOT-23-5 (Mini-mold)
Output Voltage ..................................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V
is possible.
Built-in chip enable circuit (2 Types; A: active 鈥淟鈥? B: active 鈥淗鈥?
Pinout ................................................................................Similar to the TK112, TK111





s
APPLICATIONS
Power source for cellular phones such as GSM, CDMA and various kind of PCSs.
Power source for domestic appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipment.
s
BLOCK DIAGRAM
R1121NXX1A
R1121NXX1B
3
V
DD
1
V
OUT
3
V
DD
1
V
OUT
Vref
CE
4
Current Limit
GND
2
CE
4
Vref
Current Limit
GND
2
Rev.1.11
-1-

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