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| Low Power-Loss Voltage Regulators PQ7DV5 PQ7DV5 Variable Output Type, High Output Current (5A) Type Low Power-loss Voltage Regulators s Features TO-3P package Low power-loss (Dropout voltage:MAX. 0.5V at Io=5A) Variable output type (1.5V to 7V) Minimum input voltage : 3.0V High output current type (5A) Reference voltage precision : 2.0% Built-in ON/OFF control function Built-in overcurrent protection, overheat protection function s Outline Dimensions 4.50.2 2.00.2 50.2 (Unit : mm) 17.0MAX 6 PQ7DV5 190.5 39.0MAX (1.4) s Applications Power supplies for various electronic equipment such as personal computers 4-(2.54) 12345 (0.6) 5-0.80.2 Internal connection diagram 17.0MIN 1 DC input (VIN) 2,6 DC output (VO) 3 GND 4 4 ON/OFF control terminal (VC) 5 5 Output voltage minute adjustment terminal (VADJ) 3 2 1 controller Reference comparator voltage s Absolute Mximum Ratings Parameter *1 *1 *1 (Ta=25C) Symbol VIN VC VADJ IO PD1 PD2 Tj Topr Tstg Tsol Rating 10 10 5 5.0 2.2 60 150 -20 to +80 -40 to +150 260For 10s) ( Unit V V V A W W C C C C *2 Input voltage ON/OFF control terminal voltage Output adjustment terminal voltage Output current Power dissipation (No heat sink) Power dissipation (With infinite heat sink) Junction temperature Operating temperature Storage temperature Soldering temperature *1 *2 All are open except GND and applicable terminals. Overheat protection may operate at 125= " In the absence of confirmation by device specification sheets,SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs,data books,etc.Contact SHARP in order to obtain the latest version of the device specification sheets before using any SHARP's device. " 3.7MAX Low Power-Loss Voltage Regulators s Electrical Characteristics Parameter Input voltage Output voltage Reference voltage Load regulation Line regulation Temperature coefficient of reference voltage Ripple rejection Dropout voltage ON-state voltage for control ON-state current for control OFF-state voltage for control OFF-state current for control Quiescent current PQ7DV5 (Unless otherwise specified, conditions shall be VIN=5V, IO=2.5A, VO=3V [R1=2k] Ta=25C) Symbol VIN VO Vref RegL RegI TCVO RR Vi-o VC (ON) IC (ON) VC (OFF) IC (OFF) Iq Conditions IO=5mA to 5.0A VIN=4 to 10V Tj=0 to 125C VIN=3V, IO=5A VC=2.7V VC=0.4V Io=0A NIN. 3 1.5 1.225 45 2.0 TYP. 1.25 0.5 0.5 0.01 55 MAX. 10 7 1.275 2.0 2.5 0.5 20 0.8 - 0.4 17 Unit V V V % % %/C dB V V A V mA mA *3 *3 In case of opening control terminal 4, output voltage turns on. Fig.1 VIN 0.33F Test Circuit 1 q 2 q 5 q Iq 2k R2 Vref R1 V 47F VO q VC 4 A + IO 3 q V RL A A Vo=Vref X (1+R2/R1) =1.25 X (1+R2/R1) [R1=2k,Vref =1.25V] Fig.2 0.33F Test Circuit for Ripple Rejection 1 q 4 q VC 2.7V 2 q R2 5 q 47F + ~ ei VIN IO + 3 q Vref R1 2k V eo ~ RL f=120Hz (sine wave) ei=0.5Vrms VIN=5V VO=3V (R1=2k) IO=0.5A RR=20 log (ei/eo) Fig.3 60 50 40 30 20 10 Power Dissipation vs. Ambient Temperature PD2 Fig.4 100 Relative output voltage (%) Overcurrent Protection Characteristics (Typical Value) Power dissipation PD (W) 80 60 40 PD1 :No heat sink PD2 :With infinite heat sink 20 0 PD1 0 20 40 60 80 Ambient temperature Ta (C) Note) Oblique line portion:Overheat protection may operate in this area. 0 -20 0 2.0 4.0 6.0 8.0 10 Output current IO (A) 12 Low Power-Loss Voltage Regulators Fig.5 Reference voltage deviation Vref (mV) 10 VIN=5V 8 VO=3V(R1=2k,R2=2.8k) 6 IO=2.5A 4 2 0 -2 -4 -6 -8 -10 -25 PQ7DV5 Fig.6 4 Reference Voltage Deviation vs. Junction Temperature Output Voltage vs. Input Voltage Ta =25C VO=3V(R1=2k,R2=2.8k) RL=1.2 RL= RL=0.6 2 Output voltage VO (V) 3 1 0 0 25 50 75 100 Junction temperature Tj (C) 125 0 1 2 3 4 Input voltage VIN (V) 5 Fig.7 Circuit operating current IBIAS (mA) Circuit Operating Current vs. Input Voltage Ta =25C VO=3V (R1=2k, R2=2.8k) RL=0.6 Fig.8 0.5 0.4 0.3 0.2 Dropout Voltage vs. Junction Temperature VIN :0.95VO VO=3V(R1=2k,R2=2.8k) IO=5A 100 RL=1.2 RL= 0 0 1 2 3 4 Input voltage VIN (V) 5 Dropout voltage Vi-O (V) 0.1 0 -25 0 25 50 75 100 Junction temperature Tj (C) 125 Fig.9 20 Quiescent Current vs. Junction Temperature Fig.10 Ripple Rejection vs. Input Ripple Frequency 100 80 Quiescent current Iq (mA) 14 12 10 8 6 4 2 0 -25 0 25 50 75 100 Junction temperature Tj (C) 125 Ripple rejection RR (dB) VIN =5V 18 VO=3V(R1=2k,R2=2.8k) 16 IO =0A 60 40 VIN=5V 20 VO=3V(R1=2k,R2=2.8k) Io=0.5A,ei=0.5Vrms, Ta =25C 0 0.1 1 10 Input ripple frequency f (kHz) 100 Low Power-Loss Voltage Regulators Fig.11 Ripple Rejection vs. Junction Temperature 100 Ripple rejection RR (dB) PQ7DV5 80 60 40 VIN=5V VO=3V(R1=2k,R2=2.8k) IO =0.5A,ei=0.5Vrms f=120Hz 0 25 50 75 100 Junction temperature Tj (C) 125 20 0 -25 s Standard Connection D1 VIN 1 q 2 q R2 5 q 3 q R1 VO + Cref 2k 4 q CIN CO ON/OFF signal High or Open Low :Output ON :Output OFF : This device is necessary to protect the element from damage when reverse voltage may be applied to the regulator in case of input short-circuiting. Cref : This device is necessary when it is required to enhance the ripple rejection or to delay the output start-up time*. Otherwise, it is not necessary. (Care must be taken since Cref may raise the gain, facilitating oscillation.) * The output start-up time proportional to Cref X R2. CIN, CO : Be sure to mount the devices CIN and CO as close to the device terminal as possible so as to prevent oscillation. The standard specification of CIN= 0.33F ,CO= 47F, respectively. However, adjust them as necessary after checking. R1, R2 : These devices are necessary to set the output voltage. The output voltage VO is given by the following formula: VO=Vref X (1+R2/R1) (Vref is 1.25V TYP) The standard value of R1 is 2. But value up to 10k. D1 Load + |
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