ADJUSTABLE LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJM887 is an adjustable low dropout voltage regulator with ON/OFF control. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. It is suitable for DVD, FAX and Car Audio. PACKAGE OUTLINE NJM887DL FEATURES High Ripple Rejection 7dB typ. (f=khz,vo=v Version) Output Noise Voltage Vno=5 Vrms typ. Output capacitor with. F ceramic capacitor Output Current Io(max.)=5mA High Precision Output Vref=.9V.% Low Dropout Voltage.8V typ. (Io=mA) ON/OFF Contorol Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline TO-5-5(DL) PIN CONFIGURATION 5 NJM887DL PIN FUNCTION.CONTROL..GND.V OUT 5.V ADJ BLOCK DIAGRAM V OUT Control Bandgap Reference Thermal Protection V ADJ GND Ver.6-7-6 - -
ABSOLUTE MAXIMUM RATINGS (Ta=5 C) PARAMETER SYMBOL RATINGS UNIT Input Voltage + V Control Voltage V CONT +(*) V Output Adjust Voltage V ADJ + V Power Dissipation P D 95(*) 5(*) mw Operating Temperature Topr - +85 C Storage Temperature Tstg - +5 C (*): When input voltage is less than +V, the absolute maximum control voltage is equal to the input voltage. (*): Mounted on glass epoxy board. (76...6mm: based on EIA/JEDEC standard size, Layers, Cu area mm ) (*): Mounted on glass epoxy board. (76...6mm: based on EIA/JEDEC standard, Layers) (For Layers: Applying 7. 7.mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD5-5) Operating Voltage Range =+.V +.V (Unless otherwise noted, =Vo+V, R=k, C IN =. F, Co=. F:Vo (Co=.7 F: Vo.6V), Ta=5 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Output Voltage Vo Io=mA.5-6 V Reference Voltage Vref Io=mA.77.9. V Quiescent Current I Q Io=mA,Vo=.V - A Quiescent Current at Control OFF I Q(OFF) V CONT =V - - na Output Current Io Vo.V 5 65 - ma Line Regulation Vo/ =Vo+V Vo+6.V, Io=mA - -. %/V Load Regulation Vo/ Io Io= 5mA - -. %/ma Dropout Voltage(*) V I O Io=mA -.8.8 V Ripple Rejection Average Temperature Coefficient of Output Voltage Output Noise Voltage Control Voltage for ON-state Control Voltage for OFF-state RR ein=mvrms,f=khz, Io=mA Vo=.V Version - 7 - db Vo/ Ta Ta= 85 C, Io=mA - 5 - ppm/ C V NO (*): Except output voltage less than.v. f=hz 8kHz, Io=mA, Vo=.V Version - 5 - Vrms V CONT(ON).6 - - V V CONT(OFF) - -.6 V - - Ver.6-7-6
POWER DISSIPATION VS. AMBIENT TEMPERATURE NJM887DL PowerDissipation (Topr=-~+85 C,Tj=5 C) Power Dissipation P D (mw) 5 5 on layers board on layers board 5-5 -5 5 5 75 5 5 Temperature : Ta( C) TEST CIRCUIT A I IN. F NJM887 V O R. F *5 (ceramic) I OUT V V O A I CONT CONTROL V ADJ V V CONT GND R k A I Q *5 Vo.6V version: Co=.7 F(ceramic) Vo = Vref ( + R / R ) The ceramic capacitor used by the output recommend the B characteristic. Ver.6-7-6 - -
TYPICAL APPLICATION In the case where ON/OFF Control is not required:. F NJM887 V O R. F *6 V O R (~k ) CONTROL V ADJ Vo = Vref x ( + R / R ) GND R :Recommended tok *6 Vo.6V version: Co=.7 F Connect control terminal to pin In use of ON/OFF CONTROL: V O. F *7 V O. F NJM887 R R CONTROL V ADJ Vo = Vref x ( + R / R ) GND R :Recommended tok *7 Vo.6V version: Co=.7 F State of control pin: H output is enabled. L or open output is disabled. In the case of using a resistor "R" between and control. The current flow into the control pin while the IC is ON state (I CONT ) can be reduced when a pull up resistor "R" is inserted between and the control pin. The minimum control voltage for ON state (V CONT (ON) ) is increased due to the voltage drop caused by I CONT and the resistor "R". The I CONT is temperature dependence as shown in the "Control Current vs. Temperature" characteristics. Therefore, the resistor "R" should be carefully selected to ensure the control voltage exceeds the V CONT (ON) over the required temperature range. Feedback Resistor R. The range of feedback resistor R is recommended from to k. When the value of feedback resistor R is large, the output voltage may rise higher than the setting output voltage by leak current from V OUT at high temperature. On the other hand, a smaller feedback resistor may increases output noise voltage and quiescent current. Regarding to reduce output noise voltage, refer to next article in addition. - - Ver.6-7-6
Reduction of output noise voltage: V OUT V OUT. F R (~kω) NJM887 CONTROL V ADJ C p R. F * GND R R KΩ * Vo.6V version: Co=.7 F Output feedback resistance: R, should connect near V ADJ terminal. For reduce output noise voltage, connect C p and R refer to the following table. The example of use of Cp and R Output capacity value R =kω R =kω R =Ω R Co=. F C p =pf C p =nf C p =. F Co=.7 F C p =68pF C p =6.8nF C p =.68 F kω or less Ver.6-7-6-5 -
.. Output Voltage vs. Input Voltage R=k.5 Output Voltage vs. Output Current Output Voltage : Vo (V) Io=A.9 Io=mA.8 Io=mA.7.7.8.9.... Input Voltage : VIN(V) Output Voltage : Vo (V).5.5 VIN=.V.5 R=k 6 8 Output Current : Io(mA) 5 Ground Pin Current v.s. Output Current VIN=.V R=k.5. Dropout Voltage vs. Output Current R=k Ground Pin Current : IGND (ma) 5 5 Dropout Voltage:dVI-O (V).5..5..5 5 6 7 Output Current : IO(mA) 5 6 7 Output Current:Io(mA) 6 5 Control Current vs. Control Voltage VIN=.V Io=mA R=k.5 Rc= Output Voltage vs. Control Voltage Control Current : I Cont ( A) Rc= Rc=5k Rc=k.5.5.5.5 Control Voltage : V (V) Cont Output Voltage : Vo (V).5.5.5 Rc=5k Rc=k.5.5.5 Control Voltage : V Cont (V) VIN=.V Io=mA R=k - 6 - Ver.6-7-6
Load Regulation vs. Output Current Peak Output Current vs. Input Voltage - Load Regulation : dvo/dio (mv) - - - -5-6 VIN=.V -7 R=k -8 5 6 7 Output Current : Io(mA) Peak Output Current : IoMAX (ma) 8 6 R=k 6 8 Input Voltage : VIN(V) Quiescent Current : IQ ( A) 5 5 Quiescent Current v.s. Input Voltage Output is open. Co=.uF(Ceramic) VCONT=VIN R=k Output Noise Voltage : Vn ( Vrms) 8 6 Output Noise Voltage vs. Output Current VIN=.V LPF:8kHz Co=./.7 F Cp=F R=k. F.7 F 5 5 Input Voltage : VIN(V)... Output Current : Io(mA) Ripple Rejection Ratio v.s. Frequency Ripple Rejection vs. Output Current 9 Io=mA 9 Ripple Rejection Ratio : RR (db) 8 7 6 5 Io=mA Io=mA VIN=.V ein=mvrms R=k 5 Frequency : f (Hz) Ripple Rejection : RR (db) 8 7 6 5 f=khz f=khz VIN=.V ein=mvrms R=k... Output Current : Io(mA) Ver.6-7-6-7 -
Equivalent Serise Resistance vs. Output Current VIN=.V Equivalent Serise Resistance : ESR ( ). STABLE REGION.... Output Current : Io(mA). Dropout Voltage vs. Temperature. Output Voltage vs. Temperature.5.. Dropout Voltage : dv I-O (V).5..5. @:Io=mA.5 R=k -5 5 5 Output Voltage : Vo (V).9 @:VIN=.V Io=mA R=k.8-5 5 5 Control Voltage :Vcont-off [V].5.5 Control Voltage v.s. Temperature @:VIN=.V Io=mA CL=. F(Ceramic) R=k Control Current : ICONT ( A) 8 6 Control Current v.s. Temperature @:VIN=.V Output is open. CL=. F(Ceramic) R=k VCONT=.6V -5 5 5-5 5 5 Temperature Ta ( o C) - 8 - Ver.6-7-6
Quiescent Current : IQ ( A) 5 5 5 Quiescent Current v.s. Input Voltage @:VIN=.V VCONT=.6V Output is open. R=k Short Circuit Current : Isc (ma) 5 5 5 5 Short Circuit Current v.s. Temperature @:VIN=.V Output is short to ground R=k -5 5 5-5 5 5 Line Regulation : dvo/dio (%/V)..5 Line Regulation vs. Temperature -.5 @:VIN=.-9.V Io=mA R=k -. -5 5 5 Load Regulation : dvo/dio (%/ma)..5..5..5 Load Regulation vs. Temperature @:VIN=.V Io=-5mA R=k -5 5 5 Output Peak Current v.s. Temperature Output Voltage vs. Temperature.5 Output Peak Current : Io_peak (ma) 8 6 @:VIN=.V -5 5 5 Output Voltage : Vo (V).5.5 @:VIN=.V Io=mA.5 R=k -5 5 5 Ver.6-7-6-9 -
6 ON/OFF Transient Response without Load 7 ON/OFF Transient Response Control Voltage 6 Control Voltage 5 Output Voltage : Vo [V] 8 6 Output Voltage VIN=.V Co=.uF(Ceramic) Io=mA - - - - -5 Control Voltage : Vo [V] Output Voltage : Vo [V] 5 Output Voltage VIN=.V Co=.uF(Ceramic) Io=mA -5 - -5 - -5 Control Voltage : Vo [V] -6 5 Time : t [S] - - 5 Time : t [ms]. Line Transient Response 6.5 Load Transient Response 6 Output Voltage : Vo [V].8.6...98.96 Input Voltage Output Voltage @:Co=.uF(Ceramic) Io=mA 5 - Input Voltage : V IN [V] Output Voltage : Vo [V]..5..5.95.9 Output Current Output Voltage VIN=.V Co=.uF(Ceramic) Io=mA 5 - Output Current : Io [ma].9-8 6 Time : t [ S].85-8 6 Time : t [ 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. - - Ver.6-7-6