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<f<60kHz) 66dB typ. (f=100Hz) 60dB typ. (f=1kHz) * Output Noise Voltage: Vno=30ΜV , Cp=0.01μF * Output Current: Io(max)=150mA * High Precision Output: Vo±2% * Low Dropout Voltage: △Vl-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 5 4 SOT-25 1:CONTROL(Active High) 3:NOISE BYPASS 4:VOUT 2:GND 5: VIN MARKING INFORMATION PART NUMBER VOLTAGE VOLATGE CODE PART NUMBER VOLTAGE VOLATGE CODE 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 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 15 18 19 20 21 23 24 25 26 27 28 2J 29 30 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 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 31 32 33 34 35 36 38 40 45 46 47 48 50 UTC UNISONIC TECHNOLOGIES MARKING 3 2 1 MB 4 VOLTAGE CODE 5 CO., LTD. 1 QW-R102-027,B UTC LD3870 LINEAR INTEGRATED CIRCUIT BLOCK DAGRAM VIN VOUT Cont 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=0.1μF, Co=4.7μF, Cp=0.01μF, Ta=25℃) PARAMETER SYMBOL Vo IQ TEST CONDITONS Output Voltage Quiescent Current Quiescent Current At Control OFF Output Current Line Regulation Io Vo-0.3V △Vo/△VIN VIN=Vo+1V ~ Vo+6V, Io=30mA Load Regulation △Vo/△Io Io=0 ~ 100mA IQ(OFF) Io=30mA Io=0mA, expect lcont VCONT=0V MIN. TYP. MAX. UNIT 200 +2% 300 V μA 100 nA 0.10 mA %/V 0.03 %/mA -2% 150 200 △VI-o 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, μVrms 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. Dropout Voltage Ripple Rejection UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R102-027,B UTC LD3870 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Vo=1.5V Version, VIN=2.4V, CIN=0.1μF, Co=4.7μF, Cp=0.01μF, Ta=25℃) PARAMETER SYMBOL Output Voltage Quiescent Current Quiescent Curretn At Control OFF Output Curretn Line Regulation Load Regulation Ripple Rejection Vo IQ MIN. -2% 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 150 IQ(OFF) Average Temperature Coefficient of Output Voltage Output Noise Voltage Control Voltage for ON-state Control Voltage for OFF-state TEST CONDITONS Io=30mA Io=0mA, expect Icont VCONT=0V VNO f=10Hz ~ 80kHz, Io=10mA VCONT(ON) VCONT(OFF) TYP. MAX. UNIT 200 +2% 300 V μA 100 nA 0.10 0.03 mA %/V %/mA 200 64 dB 0.13 mV/℃ 15 μVrms 1.6 0.6 V V TEST CIRCUIT A IIN VIN VOUT + + VIN 0.1 μF A UTC LD3870 4.7 μF (tantalum) V VOUT NOISE BYPASS CONTROL ICONT CP=0.01 μF GND V IOUT VCONT TYPICAL APPLICATON ① In case that ON/OFF Control is not required: VIN 0.1 μF UTC LD3870 R (0~300kΩ) CONTROL GND UTC UNISONIC VOUT VOUT 4.7 μF (ceramic or tantalum) NOISE BYPASS Cp=0.01 μF 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”. ② In use of ON/OFF CONTROL: VIN VIN VOUT VOUT 0.1 μF UTC LD3870 4.7 μF (ceramic or tantalum) R NOISE BYPASS GND CONTROL Cp=0.01 μF State of control terminal: * ”H” Æ Output is enables. * ”L”or “open” Æ 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 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS LD3870-3.0V Output Voltage vs.Input Voltage LD3870-3.0V Output Voltage vs.Output current 4 @:Ta=25℃ Co=4.7 μF(tantalum) Cp=0.01 μ F 3.1 Io=0A 3 2.9 Io=30mA 2.8 Io=100mA 2.7 2.7 2.8 @:Ta=25℃ VIN=4V CL=4.7 μF(tantalum) Cp=0.01 μ F 3.5 Outputput Voltage, Vo (V) Outputput Voltage, Vo (V) 3.2 3 2.5 2 1.5 1 0.5 2.9 3 3.1 3.2 Input Voltage, VIN (V) 0 3.4 3.3 0 LD3870-3.0V Ground Pin Current vs.Output Current 0.3 @:Ta=25℃ VIN=4V CL=4.7 μF(tantalum) Cp=0.01 μ F @:Ta=25℃ CL=4.7 μF(tantalum) Cp=0.01 μ F 0.25 Dropout Voltage, dVI-0 (V) 15 10 5 0.2 0.15 0.1 0.05 0 0 50 100 0 200 150 0 50 LD3870-3.0V Control Current vs. Control Voltage 4 @:Ta=25℃ VIN=4V CL=4.7 μF(tantalum) Cp=0.01 μ F Io=30mA Rc=0Ω 30 Rc=50kΩ 20 10 0 Rc=100kΩ 0 0.5 @: VIN=4V Ta=25 ℃ CL=4.7 μF Cp=0.01 μF Io=30mA 3.5 Outputput Voltage, Vo (V) 40 1 1.5 2 2.5 3 Control Voltage, Vcont (V) UTC UNISONIC 200 150 LD3870-3.0V Output Voltage vs.Control Voltage 60 50 100 Output current, Io (mA) Output current, Io (mA) Control Current, Icont (µA) 300 LD3870-3.0V Output Voltage vs.Output current 20 Ground Pin Current, IGND (mA) 200 250 100 150 Output current, Io (mA) 50 3.5 3 2.5 Rc=0Ω 2 Rc=50kΩ 1.5 Rc=100kΩ 1 0.5 4 0 0 0.5 1 1.5 2 2.5 3 Control Voltage, Vcont (V) TECHNOLOGIES CO., LTD. 5 QW-R102-027,B UTC LD3870 LD3870-3.0V Output Noise Voltage vs.Noise Bypass Capacitor @:Ta=25℃ VIN=4V Io=10mA 250 200 CL=1μF(Ceramic) 150 100 CL=4.7μF(Ceramic) 50 0 1p 10p 100p 0.01u 1000p Noise Bypass Capacitor, Cp (F) 100 Output Noise Voltage, Vn (µVrms) Output Noise Voltage, Vn (µVrms) 300 LINEAR INTEGRATED CIRCUIT LD3870-3.0V Output Noise Voltage vs.Noise Output Current @:Ta=25℃ VIN=4V Cp=0.01 μF 80 60 CL=1μ F(Ceramic) 40 20 CL=2.2μF(Ceramic) 0 0.001 0.1u 80 80 Ripple Rejection, RR (dB) Io=10mA Io=0mA Ripple Rejection, RR (dB) 100 LD3870-3.0V Ripple Rejection vs.Output Current LD3870-3.0V Ripple Rejection vs.Frequency 70 Io=30mA 60 50 @:Ta=25℃ VIN=4V ein=200mVrms CL=1 μF Cp=0.01μF 40 30 10 100 10K 1K Frequency, f (Hz) 70 f=1KHz 60 40 30 100K f=10KHz 50 @:Ta=25℃ VIN=5V ein=200mVrms CL=1 μF Cp=0.01μF 0.001 10 0.01 0.1 1 Output Current, Io (mA) 100 LD3870-3.0V Equivalent Serise Resistance vs.Output Current 100 Equivalent Serise Resistance, ESR ( Ω) 0.01 0.1 1 10 Output Current, Io (mA) @:Ta=25℃ VIN=4V CL=1μ F(Ceramic) Cp=0.01μ F 10 Oscillation Free 1 0.1 0.02 10 10µ 1m 10m 100µ Output Current, Io (mA) UTC UNISONIC 100m TECHNOLOGIES CO., LTD. 6 QW-R102-027,B UTC LD3870 LINEAR INTEGRATED CIRCUIT LD3870-3.0V Dropout Voltage vs.Temperature 2 0.3 Dropout Voltage, dV I-0 (V) Control Voltage, V CONT(OFF) (V) @:VIN=4V Output is open CL=4.7 μ F(tantalum) Cp=0.01 μ F 0.25 0.2 0.15 0.1 0.05 0 -50 0 50 100 Temperature, Ta ( ℃) 0.5 @:VIN=4V Output is open CL=4.7 μF(tantalum) Cp=0.01 μ F 2.5 2 1.5 1 0.5 100 Temperature, Ta ( ℃) 150 150 200 150 100 50 50 50 100 Temperature, Ta ( ℃) 250 3 0 0 300 @: VIN=4V Io=30mA C J =4.7μF(tantalum) Cp=0.01 μ F Quiescent Current, I Q (µA) Outputput Voltage, Vo (V) 1 LD3870-3.0V Quiescent Current vs.Temperature 4 0 -50 1.5 0 -50 150 LD3870-3.0V Output Voltage vs.Output current 3.5 LD3870-3.0V Control Voltage vs.Temperature 200 @:VIN=4V Output is open C J =4.7μ F(tantalum) Cp=0.01 μF including lcont 0 -50 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