NJM2870
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION The NJM2870 is low dropout voltage regulator designed for cellular phone application. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. FEATURES High Ripple Rejection s PACKAGE OUTLINE
NJM2870F
56dB ≤ RR (DC < f < 60kHz) 66dB typ. (f=100Hz) 60dB typ. (f=1kHz) Output Noise Voltage Vno=30µV typ.(Cp=0.01µF) Output Current Io(max.)=150mA High Precision Output Vo±2% Low Dropout Voltage ∆VI-O=0.12V typ. (Io=60mA, Vo≥1.8V) Input Voltage range +2∼+14V (Vo=1.5V Version) ON/OFF Control (Active High) Output capacitor with 4.7uF ceramic capacitor Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline SOT-23-5
PIN CONFIGURATION
5 4
123
NJM2870F EQUIVALENT CIRCUIT
VIN Cont
Bandgap Reference
PIN FUNCTION 1. CONTROL (Active High) 2. GND 3. NOISE BYPASS 4. VOUT 5. VIN
VOUT
Thermal Protection Noise Bypass
GND
NJM2870
ABSOLUTE MAXIMUM RATINGS(Ta=25°C) PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN +14 V Control Voltage VCONT +14(*1) V 350(*2) Power Dissipation PD SOT-23-5 mW 200(*3) Operating Temperature Topr −40 ∼ +85 °C Storage Temperature Tstg −40 ∼ +125 °C (*1) When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. (*2): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers) (*3): Device itself. ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=0.1µF, Co=4.7µF, Cp=0.01µF, Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. Io=30mA Output Voltage Vo +2% −2% − Io=0mA, expect Icont Quiescent Current 200 300 IQ − Quiescent Current 100 IQ(OFF) VCONT=0V − − at Control OFF Output Current Io 150 200 Vo−0.3V − Line Regulation 0.10 ∆Vo/∆VIN VIN=Vo+1V ∼ Vo+6V, Io=30mA − − Load Regulation 0.03 ∆Vo/∆Io Io=0 ∼ 100mA − − Dropout Voltage 0.12 0.2 ∆VI-O Io=60mA − Ripple Rejection ein=200mVrms,f=1kHz, Io=10mA RR 60 − − VIN=Vo+2V, Vo=3V Version Average Temperature Ta=0∼85°C, Io=10mA, 0.2 ∆Vo/∆Ta − − Coefficient of Output Voltage Vo=3V Version f=10Hz∼80kHz, Io=10mA, Output Noise Voltage VNO 30 − − Vo=3V Version Control Voltage for ON-state VCONT(ON) 1.6 − − Control Voltage for OFF-state VCONT(OFF) 0.6 − − 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. ELECTRICAL CHARACTERISTICS (Vo=1.5V Version, VIN=2.4V, CIN=0.1µF, Co=4.7µF, Cp=0.01µF, Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. Io=30mA Output Voltage Vo −2% Io=0mA, expect Icont Quiescent Current IQ − Quiescent Current IQ(OFF) VCONT=0V − at Control OFF Output Current Io 150 Vo−0.3V Line Regulation ∆Vo/∆VIN VIN=Vo+1V ∼ Vo+6V, Io=30mA − Load Regulation ∆Vo/∆Io Io=0 ∼ 100mA − Ripple Rejection ein=200mVrms,f=1kHz, Io=10mA RR − VIN=Vo+2V Average Temperature ∆Vo/∆Ta Ta=0∼85°C, Io=10mA − Coefficient of Output Voltage Output Noise Voltage VNO f=10Hz∼80kHz, Io=10mA, − Control Voltage for ON-state VCONT(ON) 1.6 Control Voltage for OFF-state VCONT(OFF) −
UNIT V µA nA mA %/V %/mA V dB mV/°C µVrms V V
TYP. − 200 − 200 − − 64 0.13 15 − −
MAX. UNIT +2% V 300 µA 100 nA mA − 0.10 %/V 0.03 %/mA − − − − 0.6 dB mV/°C µVrms V V
NJM2870
OUTPUT VOLTAGE RANK LIST Device Name NJM2870F15 NJM2870F18 NJM2870F19 NJM2870F02 NJM2870F21 NJM2870F23 NJM2870F24 NJM2870F25 NJM2870F26 VOUT 1.5V 1.8V 1.9V 2.0V 2.1V 2.3V 2.4V 2.5V 2.6V Device Name NJM2870F27 NJM2870F28 NJM2870F285 NJM2870F29 NJM2870F03 NJM2870F31 NJM2870F32 NJM2870F33 NJM2870F34 VOUT 2.7V 2.8V 2.85V 2.9V 3.0V 3.1V 3.2V 3.3V 3.4V Device Name NJM2870F35 NJM2870F36 NJM2870F38 NJM2870F04 NJM2870F45 NJM2870F46 NJM2870F47 NJM2870F48 NJM2870F05 VOUT 3.5V 3.6V 3.8V 4.0V 4.5V 4.6V 4.7V 4.8V 5.0V
TEST CIRCUIT
A
VIN
IIN +
0.1µF
VIN
VOUT +
NJM2870
4.7µF
IOUT V VOUT
(tantalum)
A V VCONT
ICONT
CONTROL
NOISE BYPASS
GND
Cp=0.01µF
NJM2870
TYPICAL APPLICATION 1 In case that ON/OFF Control is not required:
VIN
0.1µF R (0 ∼ 300kΩ)
VIN
VOUT
VOUT
4.7µF
(ceramic or tantalum)
NJM2870
NOISE CONTROL BYPASS
GND
Cp=0.01µF
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”.
2 In use of ON/OFF CONTROL:
VIN VIN VOUT VOUT
4.7µF
(ceramic or tantalum)
0.1µF R
NJM2870
CONTROL
NOISE BYPASS
GND
Cp=0.01µF
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.
NJM2870
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2870F Power Dissipation (Topr=-40~+85℃,Tj=125℃,PD=200mW(Ta≦25℃))
500
Power Dissipation PD(mW)
400
On Board(114.3×76.2×1.6mm, FR-4)
300 Device itself 200
100
0 -50 -25 0 25 50 75 100
Ambient Temperature Ta(℃)
NJM2870
TYPICAL CHARACTERISTICS
NJM2870
TYPICAL CHARACTERISTICS
NJM2870
TYPICAL CHARACTERISTICS
NJM2870
[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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