Low Power-Loss Voltage Regulators PQ30VB11 PQ30VB11 Variable Output Low Power-Loss Voltage Regulator(Built-in Overheat Shut-Down Function) ■ Outline Dimensions ¡Compact resin full-mold package ¡Low power-loss (Dropout voltage : MAX. 0.5V) ¡Overheat shut-down function (keep shut-down output until power-on again) ¡Variable output voltage (Setting range : 1.5 to 30V) ¡Overcurrent protection type ¡High-precision output type (Reference voltage precision : ±2.0%) (Unit : mm) 4.5±0.2 10.2MAX 2.8±0.2 13.5MIN 29.1MAX PQ30VB11 φ3.2±0.1 4-1.4 +0.3 -0 4-0.6 +0.2 -0.1 (1.5) ■ Applications (0.5) 3-(2.54) ¡Series power supply for TVs and VCRs ¡Switching power supply 4.8MAX 15.6±0.5 7.4±0.2 3.6±0.2 ■ Features 1 ● 2 ● 3 ● 4 ● Internal connection diagram 1 2 Specific IC 4 3 ■ Absolute Maximum Ratings Parameter *1 *1 *2 *3 *1 *2 *3 Input 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 DC input (VIN) 2 DC output (VO) 3 GND 4 Output voltage minute adjustment terminal (VADJ) (Ta=25˚C) Symbol VIN VADJ IO PD1 PD2 Tj Topr Tatg Tsol Rating 35 7 1 1.25 12.5 150 -20 to +80 -40 to +150 260 Unit V V A W W ˚C ˚C ˚C ˚C All are open except GND and applicable terminals. Overheat shut-down function operates at Tj>=110˚C. For 10s · Please refer to the chapter“ Handling Precautions ”. “ 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. ” Low Power-Loss Voltage Regulators ■ Electrical Characteristics (Unless otherwise specified, condition shall be VIN=15V, Vo=10V, Io=0.5A, R1=390Ω, Ta=25˚C) Parameter Input voltage Output voltage Load regulation Line regulation Ripple rejection Reference voltage Temperature coefficient of reference voltage Dropout voltage Quiescent current Overheat shut-down temperature *4 PQ30VB11 Symbol VIN VO RegL RegI RR Vref TeVref Vi-O Iq Tsd Conditions IO=5mA to 1A VIN=11 to 28V Refer to Fig. 2 MIN. 4.5 1.5 45 1.225 110 Tj=0 to 125˚C, IO=5mA *4, IO=0.5A IO=0 TYP. 0.3 0.5 55 1.25 ±1.0 130 MAX. 35 30 1.0 2.5 1.275 0.5 7 150 Unit V V % % dB V % V mA ˚C Input voltage shall be the value when output voltage is 95% in comparison with the initial value. Fig.1 Test Circuit VIN 1 ● R2 3 ● 0.33µF A VO 47µF 2 ● IO A 4 ● + V Vref R1 Iq 390Ω R2 R2 =1.25X 1+ ----------VO=Vref X 1+ ----------R1 R1 [R1=390Ω,Vref =1.25V] RL V Fig.2 Test Circuit of Ripple Rejection 1 ● ei 47µF 2 ● ~ R2 3 ● VIN 0.33µF 4 ● + IO + R1 390Ω Fig.3 Power Dissipation vs. Ambient Temperature V ~ eo IO=0.5A f=120Hz (sine wave) ei=0.5Vrms RR=20 log (ei/eo) RL Fig.4 Overcurrent Protection Characteristics (Typical Value) PD1 :No heat sink PD2 :With infinite heat sink Relative output voltage (%) Power dissipation PD (W) 13 12 PD2 11 10 9 8 7 6 5 4 3 2 PD1 1 0 -20 0 50 100 150 Ambient temperature Ta (˚C) Note) Oblique line portion:Overheat protection operates in this area. 100 80 60 40 20 0 0.5 1.0 1.5 Output current IO (A) 2.0 Low Power-Loss Voltage Regulators Fig.5 Output Voltage Adjustment Characteristics PQ30VB11 Fig.6 Output Voltage vs. Input Voltage 30 25 9 Output voltage VO (V) Output voltage VO (V) 10 R1=390Ω 20 15 10 5 0 0.01 8 1 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 Input voltage VIN (V) 10 Fig.8 Circuit Operating Current vs. Input Voltage 40 Circuit operating current IBIAS (mA) 0.5 0.45 Dropout voltage Vi-O (V) 0.4 IO=1A 0.3 0.75A 0.2 0.5A 0.15 0.1 0.25A 0.05 0 -25 0 25 50 75 100 Junction temperature Tj (˚C) 125 Fig.9 Output Peak Current vs. Junction Temperature Output peak current IOP (A) 2.2 2 1.8 RL=10Ω 6 5 0 0.1 Fig.7 Dropout Voltage vs. Junction Temperature 0.25 RL=∞Ω RL=20Ω 7 R2 (kΩ) 0.35 Tj=25˚C VO=10V R1=390Ω R2=2710Ω VIN-VO=5V 2V 1V 1.6 0.5V 1.4 IOP:Output current when output voltage 1.2 is 95% in comparison with the initial value -25 0 25 50 75 100 Junction temperature Tj (˚C) 125 35 30 Tj=25˚C VO=10V R1=390Ω R2=2710Ω 25 20 RL=10Ω 15 RL=20Ω 10 RL=∞Ω 5 0 1 2 3 4 5 6 7 8 9 10 1112 1314 15 Input voltage VIN (V) Low Power-Loss Voltage Regulators PQ30VB11 ■ Overheat Shut-down Characteristics ON VIN OFF *Tsd Tj VO * Tsd:Overheat shut-down temperature (Tj>=110˚C) 1 Overheat shut-down operates at Tj=Tsd and output OFF-state is maintained. 2 OFF-state is kept until VIN is once turned off. ■ ON/OFF Operation D1 1 ● VIN D2 4 ● R1 + 3 ● VADJ R2 VO 2 ● R2 CIN D2 VADJ R1 R3 CO RL RD RL VO’ VC High : Output OFF Low : Output ON Equivalent Circuit in OFF-state ¡ON/OFF operation is available by mounting externally D2 and R3. ¡When VADJ is forcibly raised above Vref (1.25V TYP) by applying the external signal, the output is turned off(pass transistor of regulator is turned off). When the output is OFF, VADJ must be higher then Vref MAX., and at the same time must be lower than maximum rating 7V. In OFF-state, the load current flows to RL from VADJ through R2. Therefore the value of R2 must be as high as possible. ¡VO'=VADJXRL/ (RL+R2) occurs at the load. OFF-state equivalent circuit R1 up to 10kΩ is allowed. Select as high value of RL and R2 as possible in this range. In some case, as output voltage is getting lower (VO<1V), impedance of load resistance rises. In such condition, it is sometime impossible to obtain the minimum value of VO'.So add the dummy resistance indicated by RD in the figure to the circuit parallel to the load.