NJM2891 2ch LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJM2891 is low dropout voltage regulator designed for cellular phone application. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. PACKAGE OUTLINE NJM2891PB1 FEATURES High Ripple Rejection 70dB typ. (f=1kHz , Vo=3V Version) Output Noise Voltage Vno=30µVrms typ.(Cp=0.01µF) Output capacitor with 1.0µF ceramic capacitor (Vo≥2.7V) Output Current Io(max.)=150mA × 2ch High Precision Output Vo±1.0% Low Dropout Voltage 0.10V typ. (Io=60mA) ON/OFF Control (Active High) Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline FFP12-B1 (2.0×2.0×0.85mm) PIN CONFIGURATION 9 8 7 7 8 9 10 6 6 10 11 5 5 11 12 4 4 12 1 2 3 3 TOP 2 PIN FUNCTION 1. VOUT2 2. VOUT2 3. GND 4. CONTROL2 5. VIN2 6. VIN1 7. CONTROL1 8. VOUT1 9. VOUT1 10. NOISE BYPASS1 11. NC 12. NOISE BYPASS2 1 BOTTOM NJM2891PB1 EQUIVALENT CIRCUIT VIN1/ VIN2 VOUT1/ VOUT2 Cont1/Cont2 Thermal Protection Bandgap Reference GND Noise Bypass1 / Noise Bypass2 NJM2891 (Ta=25°C) RATINGS UNIT +14 V +14(*1) V 300(*2) mW −40 ∼ +85 °C −40 ∼ +125 °C (*1):When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. (*2):On board. (25mm×25mm×0.2mm) ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg Operating Voltage VIN=+2.5V ∼ +14.0V (In case of Vo<2.1V) ELECTRICAL CHARACTERISTICS (1CH/2CH : VIN=Vo+1V, CIN=0.1µF, Co=1.0uF: Vo≥2.7V (Co=2.2uF: Vo≤2.6V), Cp=0.01µF, Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT +1.0% V Output Voltage Vo Io=30mA -1.0% − Quiescent Current Io=0mA, expect Icont IQ 120 180 µA − Quiescent Current 100 nA VCONT=0V IQ(OFF) − − at Control OFF mA Output Current Io 150 200 Vo−0.3V − Line Regulation 0.10 %/V ∆Vo/∆VIN VIN=Vo+1V ∼ Vo+6V, Io=30mA − − Load Regulation 0.03 %/mA ∆Vo/∆Io Io=0 ∼ 100mA − − Dropout Voltage Io=60mA 0.10 0.18 V ∆VI−O − ein=200mVrms,f=1kHz, Io=10mA, 70 dB Ripple Rejection RR − − Vo=3V Version Average Temperature ∆Vo/∆Ta Ta=0∼85°C, Io=10mA ±50 − − ppm/°C Coefficient of Output Voltage f=10Hz∼80kHz, Io=10mA, 30 Output Noise Voltage VNO µVrms − − Vo=3V Version Control Voltage for ON-state VCONT(ON) V 1.6 − − Control Voltage for OFF-state VCONT(OFF) 0.6 V − − (*3):The output voltage excludes under 2.1V. 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. OUTPUT VOLTAGE RANK LIST Device Name CH1 NJM2891PB1-2121 2.1V NJM2891PB1-2725 2.7V NJM2891PB1-2727 2.7V NJM2891PB1-2825 2.8V NJM2891PB1-2828 2.8V NJM2891PB1-J18 2.85V NJM2891PB1-2929 2.9V NJM2891PB1-0328 3.0V NJM2891PB1-0303 3.0V NJM2891PB1-3332 3.3V NJM2891PB1-0521 5.0V Vout CH2 2.1V 2.5V 2.7V 2.5V 2.8V 1.8V 2.9V 2.8V 3.0V 3.2V 2.1V NJM2891 TEST CIRCUIT A I CONT1 1.0µF *note1 V VOUT1 V IOUT1 VCONT1 VOUT1 VOUT1 CONTROL1 NOISE BYPASS1 A VIN1 IIN1 VIN1 0.1µF Cp=0.01µF NJM2891 NC A VIN2 IIN2 VIN2 0.1µF NOISE BYPASS2 CONTROL2 Cp=0.01µF VOUT2 V VOUT2 IOUT2 1.0µF *4 (ceramic) *4 Vo≤2.6V version: Co=2.2µF(ceramic) VOUT2 GND A ICONT2 V VCONT2 NJM2891 TYPICAL APPLICATION 1 In the case where ON/OFF Control is not required: VOUT1 1.0µF *note1 VOUT1 VOUT1 R CONTROL1 NOISE BYPASS1 (0~300kΩ) VIN1 VIN1 Cp=0.01µF 0.1µF NJM2891 NC VIN2 VIN2 R NOISE BYPASS2 Cp=0.01µF VOUT2 0.1µF (0~300kΩ) CONTROL2 VOUT2 GND VOUT2 1.0µF *5 *5 Vo≤2.6V version: Co=2.2µF 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”. NJM2891 2 In use of ON/OFF CONTROL: VOUT1 1.0µF *note1 R (0~300kΩ) VOUT1 VOUT1 CONTROL1 NOISE BYPASS1 VIN1 VIN1 Cp=0.01µF 0.1µF NJM2891 NC VIN2 VIN2 0.1µF NOISE BYPASS2 Cp=0.01µF VOUT2 CONTROL2 VOUT2 R (0~300kΩ) GND VOUT2 1.0µF *5 *5 Vo≤2.6V version: Co=2.2µF 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. NJM2891 ELECTRICAL CHARACTERISTICS NJM2891_3.0V Output Voltage vs. Input Voltage 3.2 NJM2891_3.0V Output Voltage vs. Output Current 4 @:Ta=25oC Co=1.0µF(Ceramic) Cp=0.01µF o @:Ta=25 C V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF 3.5 3.1 Output Voltage : Vo(V) Vo(V (V (V)) Output Voltage : Vo 3 Io=0A 3 2.9 Io=30mA 2.5 2 1.5 1 2.8 Io=100mA 2.7 2.7 2.8 2.9 3 0.5 3.1 3.2 3.3 0 3.4 0 0.05 0.1 NJM2891_3.0V Groun d Pin Current vs. Ou tput Cu rren t 20 0.25 0.3 @:Ta=25oC Co=1.0µF(Ceramic) Cp=0.01µF 0.25 15 Dropout Voltage:dV I-O ( V) (mA)) Ground Pi n Current : IG ND (mA 0.2 NJM2890_3.0V Dropout Voltage vs. O utput Current 0.3 @:Ta=25oC V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF 10 5 0.2 0.15 0.1 0.05 0 0 50 100 150 0 200 0 50 NJM2891_3.0V Control Curre nt vs. Control Voltage 60 Vo(V (V (V)) Output Voltage : Vo 3 30 20 Rc=0Ω 10 Rc=0Ω 2.5 Rc=100kΩ 2 1.5 Rc=50kΩ 1 o @:Ta=25 C V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF Io=30mA 0.5 Rc=50kΩ 0 0.5 1 1.5 2 2.5 200 3.5 40 0 150 NJM2891_3.0V Output Voltage vs. Control Voltage 4 @:Ta=25oC V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF Io=30mA 50 100 Output Current:Io(mA) Output Current : Io(mA) Control Curre nt : Ico nt( µA) 0.15 Output Current : Io(A) Input Voltage : V IN(V) 3 Control Voltage : Vcont(V) Rc=100kΩ 0 3.5 4 0 0.5 1 1.5 2 Control Voltage : Vcont(V) 2.5 3 NJM2891 ELECTRICAL CHARACTERISTICS 0 Quiescent Current : IQ (µA) dVo/dIo(m (m (mV) V) Load Regu lati on : dVo/dIo 2000 @:Ta=25oC VIN=4V Co=1.0µF(Ceramic) Cp=0.01µF -10 -20 -30 -40 -50 NJM2891_3.0V Qui escent Curren t v.s. In put Voltage1 NJM2891_3.0V Load Regulati on vs. Ou tput Curren t 0 50 100 150 @:Ta=25oC Output is open. Co=1.0µF(Ceramic) Cp=0.01µF including Icont 1500 1000 500 0 200 0 5 300 NJM2891_3.0V Output Noi se Voltage vs. Noise Bypass Capacitor 150 100 50 1p 100p 10p 1000p 0.01m 0.1m Noise Bypass Capacitor : Cp(F) Io=0mA 80 Ri pple Rejecti on Ratio : RR (dB) NJM2891_3.0V Output Noise Voltage vs. Output Current @:Ta=25 C V IN=4.0V Cp=0.01µF LPF:100kHz Io=10mA 70 Io=30mA 60 50 @:Ta=25oC Co=1.0µF(Ceramic) Cp=0.01µF VIN=4V ein=200mVrms 40 10 100 1k Frequency : f (Hz) 10k 80 60 Co=1.0µF(Ceramic) 40 20 Co=2.2µF(Ceramic) 0 0.001 0.01 0.1 1 Output Current : Io(mA) NJM2891_3.0V Ripple Rejection Ratio vs. Frequency 90 15 o Outpu t Noise Vol tage : Vn( µ Vrms) Outpu t Noise Vol tage : Vn( µ Vrms) 200 30 100 @:Ta=25oC VIN=4.0V Co=1.0µF(Ceramic) 250 0 10 Input Vol tage : VIN(V) Output Current : Io(mA) 100k 10 100 NJM2891 ELECTRICAL CHARACTERISTICS NJM2891_3.0V Ripple Re je ction vs. Output Curre nt(Vo=3.0V) NJM2891_3.0V Equivalent Serise Re sistance vs. Output Current 100 80 ESR(Ω Ω) Equivalent Serise Re sistance : ESR( f=1kHz Ripple Re jection : RR(dB) 70 60 f=10kHz 50 @:Ta=25oC V IN=4V ein=200mVrms Co=1.0µF(Ceramic) Cp=0.01µF 40 30 0.001 0.01 0.1 1 10 @:Ta=25oC VIN=4V Co=1.0µF(Ceramic) Cp=0.01µF 10 0.1 0.02 100 Oscillation Free 1 1µ 10µ Output Current : Io(mA) NJM2891_3.0V Dropout Vol tage vs. Temperature 0.3 Control Voltage : VC ON T( OFF ) (V) Dropout Voltage:dV I-O (V) 0.15 0.1 0.05 1.5 1 0.5 @:V IN=4V Output is Open. Co=1.0µF(Ceramic) Cp=0.01µF 0 -50 0 50 o Temperature : Ta (o C) 100 -50 150 0 50 Quiescent Current : IQ (µA) 3 VIN=4V Io=30mA Co=1.0µ A Cp=0.01µ A 0 50 100 o Temperature Ta ( o C) 150 @:VIN=4V Output is open. Co=1.0µF(Ceramic) Cp=0.01µF including Icont 250 -50 100 300 3.05 2.95 o Temperature : Ta (o C) NJM2891_3.0V Quiescent Current v.s. Temperature NJM2891_3.0V Output Voltage v.s Temperature 3.1 Output Voltage : Vo [V] 100m NJM2891_3.0V Control Voltage vs. Temperature 2 0.2 2.9 10m @:V IN=4V Io=60mA Co=1.0µF(Ceramic) Cp=0.01µF 0.25 0 1m 100µ Output Curre nt : Io(mA) 200 150 100 50 150 0 -50 0 50 o Temperature : Ta ( C) 100 150 NJM2891 ELECTRICAL CHARACTERISTICS NJM2891_3.0V Line Regulation v.s. Temperature o @:dVIN=4-9V Io=30mA Co=1.0µF(Ceramic) Cp=0.01µF 0.05 0 -0.05 0.02 0.015 0.01 0.005 0 0 50 o 100 150 -50 0 Temperature : Ta ( C) Short Ci rcui t Current : IS C (mA) Output Voltage : Vo (V) 2 1.5 1 VIN=4V Io=30mA Co=1.0µF Cp=0.01µF -50 300 250 200 150 100 50 0 50 100 150 0 200 -50 o 0 Temperature : Ta ( C) NJM2891_3.0V ON/OFF Trans ie nt Re sponse Output Vo lt ag e : Vo [ V] 7 5 6 0 -5 4 Output Voltage -10 3 -15 2 o @:Ta=25 C VDD=4.0V Co=1.0µF(Ceramic) Cp=0.01µF Io=30mA 0 -1 0 4 8 12 Time : t [mS] o 100 150 16 20 10 5 Control Voltage 5 Output Vo lt ag e : Vo [ V] Control Voltage 10 Co nt rol Voltag e : Vo [V] 6 1 50 Temperature : Ta ( C) NJM2891_3.0V ON/OFF Trans ie nt Response without load 7 5 150 @:V IN=4V Output is short to ground. Co=1.0µF(Ceramic) Cp=0.01µF 350 2.5 0 100 400 3 0.5 o NJM2891_3.0V Short Ci rcuit Current v.s. Temperature NJM2891_3.0V Output Voltage vs. Temperature 3.5 50 Temperature : Ta (o C) 0 -5 4 -10 3 Output Voltage -15 2 -20 1 -25 0 -30 -1 -20 o @:Ta=25 C VDD=4.0V Co=1.0µF(Ceramic) Cp=0.01µF Io=0mA -25 -30 0 1 2 3 Time : t [mS] 4 5 Co nt rol Voltag e : Vo [V] -0.1 -50 @:Ta=25 C V IN=4.0V Co=1.0µF(Ceramic) Cp=0.01µF Io=0-100mA 0.025 Road Regulation : dVo/dIo (%/mA) Line Regulation : dVo/dIo (%/V) NJM2891_3.0V Load Regulation v.s. Temperature 0.03 0.1 NJM2891 ELECTRICAL CHARACTERISTICS NJM2891_3.0V Lo ad Transient Re spons e NJM2891_3.0V Line Transie nt Re sponse 3.1 3.08 100 3.08 0 -50 3.02 Output Voltage 3 -100 2.98 o @:Ta=25 C VDD=4.0V Co=1.0µF(Ceramic) Cp=0.01µF 2.96 2.94 0 40 6 5 80 120 Time : t [µ [µ S] 160 200 3.06 4 3.04 3 2 3.02 Output Voltage 3 -150 2.98 -200 2.96 -250 2.94 1 Input Voltage : V I N [V] 3.04 Output Vo ltag e : Vo [ V] 50 Output Cuurent : Io [mA] Output Vo ltag e : Vo [ V] 3.1 Input Volage Output Current 3.06 150 0 o @:Ta=25 C VDD=4.0V Co=1.0µF(Ceramic) Cp=0.01µF Io=30mA -1 -2 0 40 80 120 160 200 Time : t [µ [µ S] [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.