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| Low Power-Loss Voltage Regulators PQ3RF43 PQ3RF43 3.3V/4.6V Output Low Power-Loss Voltage Regulator s Features Low power-loss (Dropout voltage : MAX.0.5V at Io = 4.0A) (Dropout voltage : MAX.1.0V at Io = 4.6A) Compact resin full-mold package (TO-220 package) 3.3V/4.6A output type High-precision output voltage type Output voltage precision : 2.5% Built-in ON/OFF control function Built-in overcurrent protection, overheat protection function s Outline Dimensions 10.2MAX 3.60.2 (Unit : mm) 4.50.2 2.80.2 7.40.2 4.8MAX 29.1MAX PQ3RF43 4-1.4 13.5MIN +0.3 -0 4-0.6 +0.2 -0.1 (1.5) 3-(2.54) (0.5) s Applications Power supplies for various electronic equipment such as personal computers 1234 qqqq Internal connection diagram 1 Control circuit 2 4 1 DC input (VIN) 2 DC output (VO) 3 GND 4 ON/OFF control terminal (VC) 3 s Absolute Maximum Ratings Parameter *1 *1 (Ta=25C) Symbol VIN VC IO PD1 PD2 Tj Topr Tstg Tsol Rating Unit 10 V 10 V 4.6 A 1.8 W 18 150 C -20 to +80 C -40 to +150 C 260 (For 10s.) C *2 Input voltage ON/OFF control terminal voltage Output current Power dissipation (No heat sink) Power dissipation (With infinite heat sink) Junction temperature Operating temperature Storage temperature 8 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. " 15.60.5 3.20.1 Low Power-Loss Voltage Regulators PQ3RF43 s Electrical Characteristics Parameter Output voltage Load regulation Line regulation Temperature coefficient of output voltage Ripple rejection Dropout voltage (1) Dropout voltage (2) ON-state voltage for control ON-state current for control OFF-state voltage for control OFF-state current for control Quiescent current Symbol VO RegL RegI TCVO RR Vi-O(1) Vi-O(2) VC (ON) IC (ON) VC (OFF) IC (OFF) Iq (Unless otherwise specified, conditions shall be VIN=5V,IO=2.0A,Ta=25C) Conditions IO=5mA to 4.6A VIN=4 to 10V Tj=0 to 125C *3, IO=4.0A *3, IO=4.6A VC=2.7V VC=0.4V IO=0A NIN. 3.218 45 2.0 TYP. 3.3 0.5 0.5 0.02 55 MAX. 3.382 2.0 2.5 0.5 1.0 20 0.8 - 0.4 17 Unit V % % %/C dB V V V A V mA mA *4 *3 *4 Input voltage shall be the value when output voltage is 95% in comparison with the initial value. In case of opening control terminal4, output voltage turns on. Fig.1 Test Circuit Fig.2 Test Circuit for Ripple Rejection VIN 1 q 2 q 4 q 3 q VC 47F VO 1 q 2 q 4 q 3 q 47F + IO + A + IO ~ ei 0.33F A Iq IC V RL VIN 0.33F RL V eo ~ A VC f=120Hz (sine wave) ei=0.5Vrms IO=0.5A RR=20 log (ei/eo) Fig.3 20 Power Dissipation vs. Ambient Temperature PD2 Fig.4 100 Overcurrent Protection Characteristics(Typical Value) Relative output voltage (%) Power dissipation PD (W) 15 80 60 40 10 PD1 :No heat sink PD2 :With infinite heat sink 5 PD1 0 -20 0 20 40 60 80 Ambient temperature Ta (C) Oblique line portion:Overheat protection may operate in this area. 20 0 0 2.0 4.0 6.0 8.0 Output current IO (A) 10.0 Note) Low Power-Loss Voltage Regulators Fig.5 5 PQ3RF43 Fig. 6 4 Output Voltage Deviation vs. Junction Temperature Output Voltage vs. Input Voltage Ta =25C Output voltage deviation VO (mV) Output voltage VO (V) VIN=5V 4 IO=2A 3 2 1 0 -1 -2 -3 -4 -5 -25 0 25 50 75 100 Junction temperature Tj (C) 125 3 RL=1.65 RL= RL=0.72 2 1 0 0 1 2 3 4 Input voltage VIN (V) 5 Fig. 7 Circuit operating current IBIAS (mA) 120 100 Circuit Operating Current vs. Input Voltage Ta =25C Fig.8 1.0 0.8 0.6 Dropout Voltage vs. Junction Temperature VIN =0.95VO Dropout voltage Vi-O (V) 50 RL=0.72 RL=1.65 RL= IO =4.6A 0.4 IO =4A 0.2 0 -25 0 0 1 2 3 4 Input voltage VIN (V) 5 0 25 50 75 100 Junction temperature Tj (C) 125 Fig.9 20 Quiescent current Iq (mA) Quiescent Current vs. Junction Temperature Fig.10 Input Ripple Frequency vs. Ripple Rejection 100 80 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 IO =0A 16 60 40 VIN=5V Io=0.5A 20 Vo=3.3A ei=0.5Vrms, R1=2k 0 0.1 1 10 Input ripple frequency f (kHz) 100 Low Power-Loss Voltage Regulators PQ3RF43 s Typical Application DC input 1 q Specific IC 3 q 0.33F 2 q 4 q + VO CO ON/OFF Control High or Open :output ON Low :output OFF Load |
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