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| UTC LD3870 LINEAR INTEGRATED CIRCUIT LOW DROPOUT VOLTAGE REGULATOR DESCRIPTION The UTC LD3870 is low dropout voltage regulator designed for cellular phone application. 1 2 3 FEATURES * High Ripple Rejection: 56dB RR(DC 1:CONTROL(Active High) 3:NOISE BYPASS 4:VOUT 2:GND 5: VIN MARKING INFORMATION PART NUMBER LD3870-1.5V LD3870-1.8V LD3870-1.9V LD3870-2.0V LD3870-2.1V LD3870-2.3V LD3870-2.4V LD3870-2.5V LD3870-2.6V LD3870-2.7V LD3870-2.8V LD3870-2.85V LD3870-2.9V LD3870-3.0V VOLTAGE 1.5V 1.8V 1.9V 2.0V 2.1V 2.3V 2.4V 2.5V 2.6V 2.7V 2.8V 2.85V 2.9V 3.0V VOLATGE CODE 15 18 19 20 21 23 24 25 26 27 28 2J 29 30 PART NUMBER LD3870-3.1V LD370-3.2V LD3870-3.3V LD3870-3.4V LD3870-3.5V LD3870-3.6V LD3870-3.8V LD3870-4.0V LD3870-4.5V LD3870-4.6V LD3870-4.7V LD3870-4.8V LD3870-5.0V VOLTAGE 3.1V 3.2V 3.3V 3.4V 3.5V 3.6V 3.8V 4.0V 4.5V 4.6V 4.7V 4.8V 5.0V VOLATGE CODE 31 32 33 34 35 36 38 40 45 46 47 48 50 MARKING 3 2 1 MB VOLTAGE CODE 4 5 UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R102-027,B UTC LD3870 BLOCK DAGRAM VIN Cont LINEAR INTEGRATED CIRCUIT VOUT Thermal Protection Noise Bypass Bandgap Reference + - GND ABSOLUTE MAXIMUM RATINGS (Ta=25 PARAMETER ) SYMBOL RATINGS UNIT Input Voltage VIN +14 V Control Voltage VCONT +14(Note 1) V Power Dissipation PD 200 mW Operating Temperature Topr -40 ~ +85 Storage Temperature Tstg -40 ~ +125 Note 1: When input voltage is less than +14V,the absolute maximum control voltage is equal to the input voltage. ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=0.1 PARAMETER Output Voltage Quiescent Current Quiescent Current At Control OFF Output Current Line Regulation Load Regulation Dropout Voltage Ripple Rejection F, Co=4.7 F, Cp=0.01 F, Ta=25 ) SYMBOL Vo IQ IQ(OFF) TEST CONDITONS Io=30mA Io=0mA, expect lcont VCONT=0V MIN. -2% TYP. 200 MAX. +2% 300 100 UNIT V A nA mA %/V %/mA Io Vo-0.3V Vo/ VIN VIN=Vo+1V ~ Vo+6V, Io=30mA Vo/ Io Io=0 ~ 100mA VI-o 150 200 0.10 0.03 Io=60mA 0.12 0.2 V ein=200mVrms, f=1kHz, Io=10mA, RR 60 dB VIN=Vo+2V, Vo=3V Version Ta=0~85 , Io=10mA, Average Temperature Vo/ Ta mV/ 0.2 Coefficient of Output Voltage Vo=3V Version Output Noise Voltage f=10Hz ~ 80kHz, Io=10mA, Vrms VNO 30 Vo=3V Version Control Voltage for ON-state VCONT(ON) 1.6 V Control Voltage for OFF-state VCONT(OFF) 0.6 V 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. UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R102-027,B UTC LD3870 PARAMETER Output Voltage Quiescent Current Quiescent Curretn At Control OFF Output Curretn Line Regulation Load Regulation Ripple Rejection Average Temperature Coefficient of Output Voltage Output Noise Voltage Control Voltage for ON-state Control Voltage for OFF-state LINEAR INTEGRATED CIRCUIT F, Co=4.7 Vo IQ IQ(OFF) F, Cp=0.01 F, Ta=25 ) ELECTRICAL CHARACTERISTICS (Vo=1.5V Version, VIN=2.4V, CIN=0.1 SYMBOL TEST CONDITONS Io=30mA Io=0mA, expect Icont VCONT=0V MIN. -2% TYP. 200 MAX. +2% 300 100 UNIT V A nA mA %/V %/mA dB mV/ Vrms Io Vo-0.3V Vo/ VIN VIN=Vo+1V ~ Vo+6V, Io=30mA Vo/ Io Io=0 ~ 100mA ein=200mVrms, f=1kHz, Io=10mA, RR VIN=Vo+2V Ta=0 ~ 85 , Io=10mA Vo/ Ta VNO f=10Hz ~ 80kHz, Io=10mA VCONT(ON) VCONT(OFF) 150 200 0.10 0.03 64 0.13 15 1.6 0.6 V V TEST CIRCUIT A VIN IIN VIN VOUT + 0.1 F + UTC LD3870 NOISE BYPASS CP=0.01 F 4.7 F (tantalum) IOUT V VOUT A ICONT CONTROL GND V VCONT TYPICAL APPLICATON In case that ON/OFF Control is not required: VIN 0.1 F VOUT VOUT 4.7 F (ceramic or tantalum) UTC LD3870 R (0~300k CONTROL GND NOISE BYPASS Cp=0.01 F UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R102-027,B UTC LD3870 LINEAR INTEGRATED CIRCUIT 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". In use of ON/OFF CONTROL: VIN 0.1 F VIN VOUT VOUT 4.7 F (ceramic or tantalum) UTC LD3870 R CONTROL NOISE BYPASS GND Cp=0.01 F State of control terminal: * "H" Output is enables. * "L"or "open" Output is disabled. * Noise bypass Capacitance Cp Noise bypass capacitance Cp reduces noise generated by hand-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. UTC UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R102-027,B UTC LD3870 3.2 LINEAR INTEGRATED CIRCUIT LD3870-3.0V Output Voltage vs.Output current 4 @:Ta=25 Co=4.7 F(tantalum) Cp=0.01 F @:Ta=25 VIN=4V CL=4.7 F(tantalum) Cp=0.01 F TYPICAL CHARACTERISTICS LD3870-3.0V Output Voltage vs.Input Voltage 3.5 Outputput Voltage, Vo (V) 3 2.5 2 1.5 1 0.5 0 Outputput Voltage, Vo (V) 3.1 Io=0A 3 2.9 Io=30mA 2.8 Io=100mA 2.7 2.7 2.8 2.9 3 3.1 3.2 Input Voltage, VIN (V) 3.3 3.4 0 50 200 250 100 150 Output current, Io (mA) 300 LD3870-3.0V Ground Pin Current vs.Output Current 20 @:Ta=25 VIN=4V CL=4.7 F(tantalum) Cp=0.01 F LD3870-3.0V Output Voltage vs.Output current 0.3 @:Ta=25 CL=4.7 F(tantalum) Cp=0.01 F Ground Pin Current, IGND (mA) 0.25 Dropout Voltage, dVI-0 (V) 0.2 0.15 0.1 0.05 15 10 5 0 0 50 100 150 200 0 0 50 100 150 200 Output current, Io (mA) LD3870-3.0V Control Current vs. Control Voltage 60 @:Ta=25 VIN=4V CL=4.7 F(tantalum) Cp=0.01 F Io=30mA Output current, Io (mA) LD3870-3.0V Output Voltage vs.Control Voltage 4 3.5 Outputput Voltage, Vo (V) 3 2.5 2 1.5 1 0.5 4 0 0 0.5 1 1.5 2 2.5 3 @: VIN=4V Ta=25 CL=4.7 F Cp=0.01 F Io=30mA 50 Control Current, Icont (A) 40 30 20 Rc=0 Rc=0 Rc=50k Rc=100k Rc=50k 10 0 Rc=100k 0 0.5 1 1.5 2 2.5 3 Control Voltage, Vcont (V) 3.5 Control Voltage, Vcont (V) UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R102-027,B UTC LD3870 300 Output Noise Voltage, Vn (Vrms) LINEAR INTEGRATED CIRCUIT 100 Output Noise Voltage, Vn (Vrms) LD3870-3.0V Output Noise Voltage vs.Noise Output Current @:Ta=25 VIN=4V Cp=0.01 @:Ta=25 VIN=4V Io=10mA LD3870-3.0V Output Noise Voltage vs.Noise Bypass Capacitor 250 80 F 200 CL=1 F(Ceramic) 150 60 CL=1 F(Ceramic) 40 100 CL=4.7 F(Ceramic) 50 20 CL=2.2 F(Ceramic) 0 1p 10p 100p 0.01u 1000p Noise Bypass Capacitor, Cp (F) LD3870-3.0V Ripple Rejection vs.Frequency 0.1u 0 0.001 0.01 0.1 1 10 Output Current, Io (mA) LD3870-3.0V Ripple Rejection vs.Output Current 100 80 Io=0mA Ripple Rejection, RR (dB) 70 Io=30mA 60 Io=10mA Ripple Rejection, RR (dB) 80 70 f=1KHz 60 f=10KHz @:Ta=25 VIN=5V ein=200mVrms CL=1 F Cp=0.01 F 50 @:Ta=25 VIN=4V ein=200mVrms CL=1 F Cp=0.01 F 50 40 40 30 30 100K 10 100 10K 1K Frequency, f (Hz) 0.001 10 0.01 0.1 1 Output Current, Io (mA) 100 100 ) LD3870-3.0V Equivalent Serise Resistance vs.Output Current @:Ta=25 VIN=4V CL=1 F(Ceramic) Cp=0.01 F Equivalent Serise Resistance, ESR ( 10 Oscillation Free 1 0.1 0.02 10 10 1m 10m 100 Output Current, Io (mA) 100m UTC UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R102-027,B UTC LD3870 0.3 LINEAR INTEGRATED CIRCUIT 2 LD3870-3.0V Control Voltage vs.Temperature @:VIN=4V Output is open CL=4.7 F(tantalum) Cp=0.01 F LD3870-3.0V Dropout Voltage vs.Temperature 0.25 Dropout Voltage, dV I-0 (V) 0.2 0.15 0.1 0.05 Control Voltage, V CONT(OFF) (V) 1.5 1 0.5 @:VIN=4V Output is open CL=4.7 F(tantalum) Cp=0.01 F 0 -50 0 50 100 Temperature, Ta ( ) 150 0 -50 0 50 100 Temperature, Ta ( ) 150 LD3870-3.0V Output Voltage vs.Output current 4 3.5 Outputput Voltage, Vo (V) 3 2.5 2 1.5 1 0.5 0 -50 0 50 100 ) 150 200 @: VIN=4V Io=30mA C J=4.7 F(tantalum) Cp=0.01 F LD3870-3.0V Quiescent Current vs.Temperature 300 250 Quiescent Current, I Q (A) 200 150 100 50 @:VIN=4V Output is open C J=4.7 F(tantalum) Cp=0.01 F including lcont 0 -50 Temperature, Ta ( 50 100 0 Temperature, Ta ( ) 150 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC UNISONIC TECHNOLOGIES CO., LTD. 7 QW-R102-027,B |
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