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MAX1727EUG Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX1727EUG Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 15 page GSM Cellular/PCN Handset RF Power Management IC 8 _______________________________________________________________________________________ Pin Description PIN NAME FUNCTION 1 R3EN Regulator R3 Enable Input 2 PCEN Op Amp and Band Switch Mux Enable Input 3 PC1+ Op Amp 1 Noninverting Input 4 PC1- Op Amp 1 Inverting Input 5 PC1OUT Op Amp 1 Output 6VPC Op Amp Power Supply 7 PC2OUT Op Amp 2 Output 8 PC2- Op Amp 2 Inverting Input 9 PC2+ Op Amp 2 Noninverting Input 10 PCNAPC Band Switch PCN Output. Normally connected to PCN PA APC. Internally shorts to ground when not selected. 11 BANDSWIN Band Switch Input. Normally connected to PC2OUT. 12 GSMAPC Band Switch GSM Output. Normally connected to GSM PA APC. Internally shorts to ground when not selected. 13 GSM/PCN Band Switch Control Input. With logic high, BANDSWIN is connected to GSMAPC. With logic low, BANDSWIN is connected to PCNAPC. 14 R1EN Regulator R1 Enable Input 15 R2EN Regulator R2 Enable Input 16 R2OUT Output of Linear Regulator 2. 50mA output current. Use 1 µF low ESR bypass capacitor to GND. 17 VCC Regulator Power Supply 18 R1OUT Output of Linear Regulator 1. 100mA output current. Use 1 µF low ESR bypass capacitor to GND. 19 R3BYP Output of Linear Regulator 4. Power supply for regulator R3 and 1.25V reference. Use 1 µF low ESR bypass capacitor to GND. 20 R3OUT Output of Linear Regulator 3. 20mA output current. Use 1 µF low ESR bypass capacitor to GND. 21 VCOOUT Switched R3 Output 22 ENVCO VCO Switch Control Input. With logic high, VCOOUT is connected to R3OUT. With logic low, VCOOUT is high impedance. 23 CBYP 1.25V Voltage Reference Bypass Pin. Connect low-leakage, 0.01 µF bypass capacitor to GND to minimize noise at the output. 24 GND Ground |
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