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NJM2880
LOW DROPOUT VOLTAGE REGULATOR
I GENERAL DESCRIPTION The NJM2880 is a low dropout voltage regulator. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. I FEATURES GHigh Ripple Rejection 70dB typ. (f=1kHz) GOutput Noise Voltage Vno=30uVrms (Cp=0.01uF) GOutput capacitor with 1.0uF ceramic capacitor GOutput Current Io(max.)=300mA GHigh Precision Output Vo1.0% GLow Dropout Voltage 0.10V typ. (Io=100mA) GON/OFF Control (Active High) GInternal Short Circuit Current Limit GInternal Thermal Overload Protection GBipolar Technology GPackage Outline SOT-89(5pin) I PIN CONFIGURATION PIN FUNCTION 1.CONTROL (Active High) 2.GND 3.NOISE BYPASS 4.VOUT 5.VIN I PACKAGE OUTLINE
NJM2880U
NJM2880U I EQUIVALENT CIRCUIT
VIN Cont
VOUT
Thermal Protection Noise Bypass
Bandgap Reference
GND
I OUTPUT VOLTAGE RANK LIST Device Name Vout Device Name NJM2880U21 2.1V NJM2880U33 NJM2880U25 2.5V NJM2880U38 NJM2880U26 2.6V NJM2880U05 NJM2880U27 NJM2880U28 NJM2880U285 NJM2880U03 2.7V 2.8V 2.85V 3.0V
Vout 3.3V 3.8V 5.0V
NJM2880
I ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg (Ta=25C) RATINGS UNIT +14 V +14(note 1) V 350 mW -40 +85 C -40 +125 C (note 1) When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. I ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, Co=1.0uF: Vo2.7V (Co=2.2uF: Vo2.6V), Cp=0.01uF, Ta=25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. Output Voltage Vo Io=30mA -1.0% +1.0% Io=0mA, expect Icont Quiescent Current 120 180 IQ Quiescent Current VCONT=0V 100 IQ(OFF) at Control OFF Vo-0.3V Output Current Io 300 400 Line Regulation 0.10 Vo/VIN VIN=Vo+1V Vo+6V, Io=30mA Load Regulation 0.03 Vo/Io Io=0 300mA Dropout Voltage Io=100mA 0.10 0.18 VI-O ein=200mVrms,f=1kHz, Io=10mA Ripple Rejection RR 70 Vo=3V Version Average Temperature Coefficient of Output Vo/Ta Ta=085C, Io=10mA 50 Voltage f=10Hz80kHz, Io=10mA, Output Noise Voltage VNO 30 Vo=3V Version Control Voltage for 1.6 VCONT(ON) ON-state Control Voltage for VCONT(OFF) 0.6 OFF-state (note 2) The above specification is a common specification for all output voltages. Therefore, it may be different from the individual specification for a specific output voltage. I TEST CIRCUIT
UNIT V uA nA mA %/V %/mA V dB ppm/C uVrms V V
A
VIN
IIN
VIN
VOUT 1.0uF OR 2.2uF(Vo<2.6V) (Ceramic Capacitor) IOUT
0.1uF
V
VOUT
A V
VCONT
ICONT CONTROL GND
NOISE BYPASS Cp=0.01uF
NJM2880
I TYPICAL APPLICATION x In the case where ON/OFF Control is not required:
VIN VIN VOUT 1.0uF OR 2.2uF(Vo<2.6V) (Ceramic Capacitor) R (0~300k )
VOUT
0.1uF
CONTROL GND
NOISE BYPASS Cp=0.01uF
Connect control terminal to VIN terminal The quiescent current can be reduced by using a resistance "R". Instead, it increases the minimum operating voltage. For further information, please refer to Figure "Output Voltage vs. Control Voltage".
y In use of ON/OFF CONTROL:
VIN VIN VOUT 1.0uF OR 2.2uF(Vo<2.6V) (Ceramic Capacitor) R CONTROL GND NOISE BYPASS Cp=0.01uF
VOUT
0.1uF
State of control terminal: *"H" output is enabled. * "L" or "open" output is disabled. Noise bypass Capacitance Cp
Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit.
Noise level and ripple rejection will be improved when larger Cp is used.
Use of smaller Cp value may cause oscillation. Use the Cp value of 0.01uF greater to avoid the problem.
NJM2880
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.

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