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| IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR DESCRIPTION The IP1524 is a dual output voltage LDO regulator which can provide up to 500mA of output current. The IP1524 consists of 1 -fixed 3.3V and 1 -adjustable regulators. 14SOPH-8L FEATURES - 1-Fixed 3.3V LDO regulator with internal NPN TR. - 1-Adjustable LDO regulator with internal NPN TR. - Built-in TSD circuit. - Built-in current limit circuit. - Built-in over voltage protection circuit. - Output trimmed to +/-3% Tolerance ORDERING INFORMATION Device IP1524 Package 14SOPH-8L Operating Temp -35 OC ~ +85 OC BLOCK DIAGRAM VIN 1 Vref ON/OFF 2 PGND VOUT1 3 ADJ2 4 VOUT2 5 On/off control SW Shutdown N/C 6 PGND OCL N/C 7 OVP TSD December. 2002 (Rev.0) www.interpionsemi.com -1- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR PIN CONNECTIONS PGND PGND IP1524 1 2 3 4 5 6 7 VIN ON/OFF VOUT1 ADJ2 VOUT2 N/C N/C PIN DESCRIPTIONS NO 1 2 3 4 5 6 7 8 SYMBOL VIN ON/OFF VOUT1 ADJ2 VOUT2 N/C N/C PGND I/O I I O I O I DESCRIPTION Input Supply Voltage ON/OFF control Regulator 1 Output (3.3V fixed) Regulator 2 Adjustable Pin Regulator 2 Output (Adjustable) No Connection No Connection Power Ground December. 2002 (Rev.0) www.interpionsemi.com -2- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR ABSOLUTE MAXIMUM RATINGS(TA=25OC) CHARACTERISTICS Maximum supply voltage Input voltage Power dissipation Operating temperature Storage temperature SYMBOL Vccmax Vinmax Pd Topr Tstr VALUE 10 10 3.0* -35 ~ +85 -55 ~ +150 UNIT V V W O C C O Note> 1. When mounted on 100mm X 100mm X 1mm PCB (Phenolic resin material). 2. Power dissipation reduces 24mW/OC for using above Ta=25O C 3. Do not exceed Pd and SOA. POWER DISSIPATION CURVE 4 Power Dissipation (W) 3 2 SOA 1 0 25 50 75 100 125 150 175 Ambient Temperature (C) RECOMMENDED OPERATING CONDITIONS CHARACTERISTICS Input voltage SYMBOL VIN VALUE 4.5 ~ 6.0 UNIT V December. 2002 (Rev.0) www.interpionsemi.com -3- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR ELECTRICAL CHARACTERISTICS ( Vin= 5V, Co=10uF, Ta = 25O C, unless otherwise specified.) Characteristics Quiescent current OVP Dectecting Voltage Reference voltage Symbol Icc Vovp Vref Condition Vcc=5V, No-Load Vcc=Variable Min. 6.5 1.212 Typ. 7 1.25 Max. 12 1.288 Units mA V V LDO REGULATOR 1 (3.3V FIXED TYPE) Output Voltage Line Regulation Load Regulation Dropout voltage Ripple rejection Current limit *Note Vout1 dVline1 dVload 1 Vdrop1 RR1 Ilimit1 Temp1 Io=10mA Vin=4.5~6V, Io=10mA Ta=25 OC Vin=5V, 10mA < Io < 500mA Io=500mA F=120Hz, Co=10uF Tantalum Vin-Vout=2V, Io=250mA - 3.2 60 500 - 3.3 0.01 0.4 1.1 70 0.5 3.4 0.2 0.8 1.3 - V % % V dB mA % Temperature stability LDO REGULATOR 2 (ADJUSTABLE TYPE) Output Voltage Line Regulation Load Regulation Dropout voltage Ripple rejection Current limit *Note Vout2 dVline2 dVload2 Vdrop2 RR2 Ilimit2 Iadj 2 Ilmin2 Temp2 Io=10mA Vin=4.5~6V, Io=10mA Ta=25 OC Vin=5V, 10mA < Io < 400mA Io=400mA F=120Hz, Co=10uF Tantalum Vin-Vout=2V, Io=200mA - Vref 60 500 10 - 0.01 0.4 1.1 70 0.1 0.5 Vin1.5V 0.2 0.8 1.3 - V % % V dB mA uA mA % Adjust pin current Minimum load current Temperature stability ON/OFF CONTROL PART On voltage Off voltage Von Voff Vout=Enabled Vout=Disabled 2.0 0.8 V V *Note Don't exceed following current limit December. 2002 (Rev.0) www.interpionsemi.com -4- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR APPLICATION SUMMARY - ON / OFF When you want to control output of the IP1524, use pin #2 as follows Main bias Q1 Pin#2 Vth As shown in figure Pin#2 is positive input of the comparator, and the other Input is threshold voltage. If the voltage of the pin#2 rises above threshold voltage, then TR Q1 will be saturated and the main bias current will be shut down. December. 2002 (Rev.0) www.interpionsemi.com -5- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR TYPICAL APPLICATION CIRCUIT PGND PGND IP1524 VIN 1 ON/OFF 2 VOUT1 3 ADJ2 4 VOUT2 5 Radj1 N/C 6 N/C 7 10uF Radj2 10uF Vinput ON/OFF Vout1 Vout2 *CALCULATION OF OUTPUT VOLTAGE VOUT2 = VREF ( 1 + (Radj1 / Radj2) ) =1.25V ( 1 + (Radj1 / Radj2) ) December. 2002 (Rev.0) www.interpionsemi.com -6- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR INTERNAL CIRCUIT Pin no Pin name Internal circuit 2 2 ON/OFF Regulator Output1,2 3,4,5 Regulator Adjustable pin Vref 4 3 5 December. 2002 (Rev.0) www.interpionsemi.com -7- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR ELECTRICAL CHARACTERISTICS CURVES QUIESCENT CURRENT 10 8 Vo2=1.25V Ro2=1K Icc (mA) 6 4 2 0 0 2 4 6 8 10 Vcc (V) VREF TEMPERTURE STABILITY 1.270 1.265 1.260 1.255 VREF (V) 1.250 1.245 1.240 1.235 1.230 -50 0 50 100 O 150 TEMP ( C) December. 2002 (Rev.0) www.interpionsemi.com -8- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR ELECTRICAL CHARACTERISTICS CURVES (Continued) VOUT1 Load Regulation (Tj=25 C) 3.40 o 3.35 Output Voltage (V) 3.30 3.25 3.20 0 200 400 600 800 1000 Output Current (mA) VOUT2 Load Regulation (Tj=25 C) 1.35 o 1.30 Output Voltage (V) Vo2=1.25V 1.25 1.20 1.15 1.10 0 200 400 600 800 1000 Output Current (mA) December. 2002 (Rev.0) www.interpionsemi.com -9- IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR ELECTRICAL CHARACTERISTICS CURVES (Continued) VOUT1 Load Transient Response 200 Output Voltage Deviation (mV) 100 Io=50mA 0 Io=500mA -100 -200 -300 0 20 40 60 80 Time (usec) VOUT2 Load Transient Response 200 Output Voltage Deviation (mV) Vout2=1.25V 100 Io=50mA 0 Io=400mA -100 -200 0 20 40 60 80 Time (usec) December. 2002 (Rev.0) www.interpionsemi.com - 10 - IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR ELECTRICAL CHARACTERISTICS CURVES (Continued) Dropout Voltage 1.4 1.2 Dropout Voltage (V) 1.0 0.8 0.6 0 200 400 600 800 Output Current (mA) December. 2002 (Rev.0) www.interpionsemi.com - 11 - IP1524 DUAL OUTPUT VOLTAGE LDO REGULATOR PACKAGE DIMENSION 14SOPH-8L MIN0.05 1.55 0.10 (0.061 0.004) (MIN0.002) (0.019) #1 4.216 0.47 0.406 1.80MAX (0.071MAX) +0.10 -0.05 8.70MAX (0.343MAX) 2.946 8.56 0.20 (0.347 0.008) 6.00 0.30 (0.236 0.012) (0.008,+0.004,-0.002) 3.95 0.2 (0.156 0.008) 0.20 +0.10 -0.05 5.72 0.60 0.20 (0.024 0.008) (0.225) 0~8 December. 2002 (Rev.0) www.interpionsemi.com 1.27TYP (0.050TYP) - 12 - (0.008,+0.004,-0.002) |
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