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| 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. FEATURES High Ripple Rejection 70dB typ. (f=1kHz , Vo=3V Version) Output Noise Voltage Vno=30Vrms typ.(Cp=0.01F) Output capacitor with 1.0F ceramic capacitor (Vo2.7V) Output Current Io(max.)=150mA x 2ch High Precision Output Vo1.0% 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 (2.0x2.0x0.85mm) PIN CONFIGURATION PIN FUNCTION 1. VOUT2 2. VOUT2 3. GND 4. CONTROL2 5. VIN2 6. VIN1 PACKAGE OUTLINE NJM2891PB1 9 10 11 12 1 8 7 6 5 4 6 5 4 7 8 9 10 11 12 7. CONTROL1 8. VOUT1 9. VOUT1 10. NOISE BYPASS1 11. NC 12. NOISE BYPASS2 2 3 3 2 1 TOP BOTTOM NJM2891PB1 EQUIVALENT CIRCUIT VIN1/ VIN2 Cont1/Cont2 Thermal Protection Bandgap Reference Noise Bypass1 / Noise Bypass2 VOUT1/ VOUT2 GND NJM2891 (Ta=25C) 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. (25mmx25mmx0.2mm) Operating Voltage VIN=+2.5V +14.0V (In case of Vo<2.1V) ELECTRICAL CHARACTERISTICS (1CH/2CH : VIN=Vo+1V, CIN=0.1F, Co=1.0uF: Vo2.7V (Co=2.2uF: Vo2.6V), Cp=0.01F, Ta=25C) 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 A - 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=085C, Io=10mA 50 - - ppm/C Coefficient of Output Voltage f=10Hz80kHz, Io=10mA, 30 Output Noise Voltage VNO Vrms - - 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 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg 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 V 1.0F *note1 IOUT1 VOUT1 I CONT1 V VCONT1 VOUT1 VOUT1 CONTROL1 NOISE BYPASS1 Cp=0.01F VIN1 0.1F A IIN1 VIN1 NC NJM2891 VIN2 A 0.1F IIN2 VIN2 NOISE BYPASS2 CONTROL2 Cp=0.01F VOUT2 VOUT2 GND A ICONT2 V VCONT2 V VOUT2 IOUT2 1.0F *4 (ceramic) *4 Vo2.6V version: Co=2.2F(ceramic) NJM2891 TYPICAL APPLICATION 1 In the case where ON/OFF Control is not required: VOUT1 1.0F *note1 VOUT1 NOISE BYPASS1 Cp=0.01F VOUT1 R CONTROL1 (0~300k) VIN1 0.1F VIN1 NC NJM2891 VIN2 0.1F VIN2 R NOISE BYPASS2 Cp=0.01F (0~300k) CONTROL2 VOUT2 GND VOUT2 VOUT2 1.0F *5 *5 Vo2.6V version: Co=2.2F 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 1.0F *note1 R (0~300k) VOUT1 VOUT1 CONTROL1 NOISE BYPASS1 Cp=0.01F VIN1 VIN1 0.1F NC NJM2891 VIN2 0.1F VIN2 NOISE BYPASS2 Cp=0.01F CONTROL2 VOUT2 GND R (0~300k) VOUT2 VOUT2 1.0F *5 *5 Vo2.6V version: Co=2.2F 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 @:Ta=25oC Co=1.0F(Ceramic) Cp=0.01F 3.1 3.2 4 3.5 NJM2891_3.0V Output Voltage vs. Output Current @:Ta=25 C VIN=4V Co=1.0F(Ceramic) Cp=0.01F o 3 Output Voltage : Vo(V ) Vo(V (V) Io=0A 3 Output Voltage : Vo(V) 3.2 3.3 3.4 2.5 2 2.9 Io=30mA 2.8 Io=100mA 1.5 1 0.5 0 0 0.05 0.1 0.15 0.2 0.25 0.3 2.7 2.7 2.8 2.9 3 3.1 Input Voltage : V IN(V) Output Current : Io(A) 20 NJM2891_3.0V Groun d Pin Current vs. Ou tput Cu rren t @:Ta=25oC VIN=4V Co=1.0F(Ceramic) Cp=0.01F 0.3 NJM2890_3.0V Dropout Voltage vs. O utput Current @:Ta=25oC Co=1.0F(Ceramic) Cp=0.01F 0.25 G ND( mA Ground Pi n Current : I ND (mA) (mA) 15 Dropout Voltage:dV I-O ( V) Voltage:dVI-O 0 50 100 150 200 0.2 10 0.15 0.1 5 0.05 0 0 0 50 100 150 200 Output Current : Io(mA) Output Current:Io(mA) 60 NJM2891_3.0V Control Curre nt vs. Control Voltage @:Ta=25oC VIN=4V Co=1.0F(Ceramic) Cp=0.01F Io=30mA 4 NJM2891_3.0V Output Voltage vs. Control Voltage 50 3.5 Control Curre nt : Ico nt( A) 3 Rc=0 40 Output Voltage : Vo(V ) Vo(V (V) 2.5 Rc=100k 30 2 1.5 20 Rc=0 10 Rc=100k Rc=50k 1 0.5 Rc=50k 0 0.5 @:Ta=25 C VIN=4V Co=1.0F(Ceramic) Cp=0.01F Io=30mA 0 0.5 1 1.5 2 2.5 3 o 0 1 1.5 2 2.5 0 3.5 4 Control Voltage : Vcont(V) 3 Control Voltage : Vcont(V) NJM2891 ELECTRICAL CHARACTERISTICS NJM2891_3.0V Load Regulati on vs. Ou tput Curren t @:Ta=25oC VIN=4V Co=1.0F(Ceramic) Cp=0.01F 2000 0 NJM2891_3.0V Qui escent Curren t v.s. In put Voltage1 @:Ta=25oC Output is open. Co=1.0F(Ceramic) Cp=0.01F including Icont -10 Load Regu lati on : dVo/dIo(mV) dVo/dIo(m (mV) -20 Quiescent Current : IQ (A) IQ ( 0 50 100 150 200 1500 1000 -30 500 -40 -50 0 0 5 10 15 Output Current : Io(mA) VIN Input Vol tage : VIN(V) 300 NJM2891_3.0V Output Noi se Voltage vs. Noise Bypass Capacitor @:Ta=25oC VIN=4.0V Co=1.0F(Ceramic) 100 NJM2891_3.0V Output Noise Voltage vs. Output Current @:Ta=25 C VIN=4.0V Cp=0.01F LPF:100kHz o 250 Outpu t Noise Vol tage : Vn( Vrms) Vn( 200 Outpu t Noise Vol tage : Vn( Vrms) Vn( 80 60 Co=1.0F(Ceramic) 40 150 100 50 20 Co=2.2F(Ceramic) 0 1p 10p 100p 1000p 0.01m 0.1m 0 0.001 0.01 0.1 1 10 100 Noise Bypass Capacitor : Cp(F) Output Current : Io(mA) 90 NJM2891_3.0V Ripple Rejection Ratio vs. Frequency Io=0mA 80 Ri pple Rejecti on Ratio : RR (dB) Io=10mA 70 Io=30mA 60 50 @:Ta=25oC Co=1.0F(Ceramic) Cp=0.01F VIN=4V ein=200mVrms 10 100 1k 10k 100k 40 30 Frequency : f (Hz) NJM2891 ELECTRICAL CHARACTERISTICS NJM2891_3.0V Ripple Re je ction vs. Output Curre nt(Vo=3.0V) 80 100 NJM2891_3.0V Equivalent Serise Re sistance vs. Output Current @:Ta=25oC VIN=4V Co=1.0F(Ceramic) Cp=0.01F 70 Equivalent Serise Re sistance : ESR( ) ESR( f=1kHz Ripple Re jection : RR(dB) 10 60 f=10kHz 50 @:Ta=25oC VIN=4V ein=200mVrms Co=1.0F(Ceramic) Cp=0.01F 1 Oscillation Free 40 0.1 30 0.001 0.01 0.1 1 10 100 0.02 1 10 100 1m 10m 100m Output Current : Io(mA) Output Curre nt : Io(mA) 0.3 NJM2891_3.0V Dropout Vol tage vs. Temperature @:VIN=4V Io=60mA Co=1.0F(Ceramic) Cp=0.01F 2 NJM2891_3.0V Control Voltage vs. Temperature 0.25 Control Voltage : VC ON T( OFF ) (V) VCONT(OFF) 1.5 Dropout Voltage:dV I-O (V) Voltage:dVI-O 0.2 0.15 1 0.1 0.5 @:VIN=4V Output is Open. Co=1.0F(Ceramic) Cp=0.01F 0 -50 0 50 100 150 0.05 0 -50 0 o Temperature : Ta ( C) 50 o 100 150 o Temperature : Ta ( C) o 3.1 NJM2891_3.0V Output Voltage v.s Temperature NJM2891_3.0V Quiescent Current v.s. Temperature 300 @:VIN=4V Output is open. Co=1.0F(Ceramic) Cp=0.01F including Icont 250 3.05 Output Voltage : Vo [V] Quiescent Current : IQ (A) IQ ( 150 200 3 150 100 2.95 VIN=4V Io=30mA Co=1.0A Cp=0.01A -50 0 50 o Temperature Ta ( C) o 50 2.9 100 0 -50 0 50 Temperature : Ta ( C) o 100 150 NJM2891 ELECTRICAL CHARACTERISTICS NJM2891_3.0V Line Regulation v.s. Temperature 0.1 @:dVIN=4-9V Io=30mA Co=1.0F(Ceramic) Cp=0.01F 0.03 NJM2891_3.0V Load Regulation v.s. Temperature @:Ta=25 C VIN=4.0V Co=1.0F(Ceramic) Cp=0.01F Io=0-100mA o 0.025 0.05 Road Regulation : dVo/dIo (%/mA) Line Regulation : dVo/dIo (%/V) 0.02 0 0.015 0.01 -0.05 0.005 -0.1 -50 0 0 50 Temperature : Ta ( C) o 100 150 -50 0 o Temperature : Ta ( C) 50 o 100 150 3.5 NJM2891_3.0V Output Voltage vs. Temperature NJM2891_3.0V Short Ci rcuit Current v.s. Temperature 400 350 @:VIN=4V Output is short to ground. Co=1.0F(Ceramic) Cp=0.01F 3 Short Ci rcui t Current : IS C (mA) ISC 50 100 o Output Voltage : Vo (V) 2.5 300 250 200 150 2 1.5 1 VIN=4V Io=30mA Co=1.0F Cp=0.01F 100 50 0 -50 0 0.5 0 -50 0 150 200 Temperature : Ta ( C) Temperature : Ta ( C) 50 o 100 150 NJM2891_3.0V ON/OFF Trans ie nt Re sponse 7 6 5 Output Vo lt ag e : Vo [ V] 4 Output Voltage 3 2 1 0 -1 0 4 8 12 Time : t [mS] 16 20 -10 -15 -20 -25 -30 Control Voltage 10 5 0 -5 7 6 5 Output Vo lt ag e : Vo [ V] 4 3 NJM2891_3.0V ON/OFF Trans ie nt Response without load 10 5 Control Voltage 0 -5 -10 Output Voltage 2 1 0 -1 0 1 2 3 Time : t [mS] 4 5 -15 -20 -25 -30 Co nt rol Voltag e : Vo [V] @:Ta=25 C VDD=4.0V Co=1.0F(Ceramic) Cp=0.01F Io=30mA o @:Ta=25 C VDD=4.0V Co=1.0F(Ceramic) Cp=0.01F Io=0mA o Co nt rol Voltag e : Vo [V] NJM2891 ELECTRICAL CHARACTERISTICS NJM2891_3.0V Lo ad Transient Re spons e 3.1 3.08 3.06 Output Vo ltag e : Vo [ V] 3.04 3.02 Output Voltage 3 2.98 2.96 2.94 0 40 80 120 [ Time : t [ S] 160 200 -100 -150 -200 -250 Output Current 150 100 50 0 -50 3.1 3.08 Input Volage Output Cuurent : Io [mA] 3.06 Output Vo ltag e : Vo [ V] 3.04 3.02 Output Voltage 3 2.98 2.96 2.94 0 40 80 120 [ Time : t [ S] 160 200 1 0 -1 -2 4 3 2 Input Voltage : V I N [V] VIN NJM2891_3.0V Line Transie nt Re sponse 6 5 @:Ta=25 C VDD=4.0V Co=1.0F(Ceramic) Cp=0.01F o @:Ta=25 C VDD=4.0V Co=1.0F(Ceramic) Cp=0.01F Io=30mA o [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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