LTC4403-1/LTC4403-2 Multiband RF Power Controllers for EDGE/TDMA FEATURES DESCRIPTIO n Supports AM Modulation in EDGE/TDMA (ANSI-136) The LTC 4403-2 is a multiband RF power controller for Applications RF power amplifiers operating in the 300MHz to 2.4GHz n Single Output RF Power Amplifier Control range. The LTC4403-2 has two outputs to control dual T X (LTC4403-1) PA modules with two control inputs. An internal sample n Dual Output RF Power Amplifier Control (LTC4403-2) and hold circuit enables the LTC4403-2 to be used with n Internal Schottky Diode Detector with >40dB Range AM modulation via the carrier or PA supply. The input n Wide Input Frequency Range: 300MHz to 2.4GHz voltage range is optimized for operation from a single n Autozero Loop Cancels Offset Errors and lithium-ion cell or 3 NiMH. Temperature Dependent Offsets RF power is controlled by driving the RF amplifier power n Wide V Range: 2.7V to 6V IN control pins and sensing the resultant RF output power. n Allows Direct Connection to Battery The RF sense voltage is peak detected using an on-chip n RF Output Power Set by External DAC Schottky diode. This detected voltage is compared to the n Internal Frequency Compensation DAC voltage at the PCTL pin to control the output power. n Rail-to-Rail Power Control Outputs n Low Operating Current: 1mA The LTC4403-1 is a single output RF power controller n Low Shutdown Current: <10m A with identical performance to the LTC4403-2. The n PCTL Input Filter LTC4403-1 has one output to control a single T PA or X n Available in a 8-Pin MSOP Package (LTC4403-1) dual T PA module with a single control input and is X and 10-Pin MSOP (LTC4403-2) available in an 8-pin MSOP package. U Internal and external offsets are cancelled over tempera- APPLICATIO S ture by an autozero control loop. The shutdown feature n Multiband GSM/GPRS/EDGE Cellular disables the part and reduces the supply current to Telephones <10m A. n PCS Devices , LTC and LT are registered trademarks of Linear Technology Corporation. n Wireless Data Modems n U.S. TDMA Cellular Phones TYPICAL APPLICATIO LTC4403-2 Multiband EDGE Cellular Telephone Transmitter LTC4403-2 50 1 10 V RF IN 9 2 0.4pF Li-Ion 0.1F BSEL BSEL V PCA 0.05pF 8 3 V HOLD V V HOLD PCB 850MHz/ RF PA 7 4 900MHz SHDN SHDN GND 6 5 DAC PCTL GND DIPLEXER 1.8GHz/ RF PA 1.9GHz 4403 TA01 4403f 1 U ULTC4403-1/LTC4403-2 ABSOLUTE AXI U RATI GS (Note 1) V to GND ............................................... 0.3V to 6.5V I .................................................................................. 10mA IN VPCA/B V , V Voltage .................................. 0.3V to 4.6V Operating Temperature Range (Note 2) .. 40 C to 85 C PCA PCB PCTL Voltage ............................... 0.3V to (V + 0.3V) Storage Temperature Range ................ 65 C to 150 C IN RF Voltage ........................................ (V 2.6V) to 7V Maximum Junction Temperature ........................ 125 C IN SHDN, V , BSEL Voltage Lead Temperature (Soldering, 10 sec)................ 300 C HOLD to GND ......................................... 0.3V to (V + 0.3V) IN UUW PACKAGE/ORDER I FOR ATIO ORDER PART ORDER PART TOP VIEW TOP VIEW NUMBER NUMBER V 1 10 RF IN V 1 8 RF IN V 2 9 BSEL PCA V 2 7 V PCA HOLD V 3 8 V HOLD PCB GND 6 SHDN LTC4403-1EMS8 LTC4403-2EMS 3 GND 4 7 SHDN GND 4 5 PCTL GND 5 6 PCTL MS8 PACKAGE MS8 PART MARKING MS PACKAGE MS PART MARKING 8-LEAD PLASTIC MSOP 10-LEAD PLASTIC MSOP T = 125 C, q = 160 C/W JMAX JA T = 125 C, q = 160 C/W JMAX JA LTXG LTXJ Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at T = 25 C. V = 3.6V, SHDN = V unless otherwise noted. A IN IN PARAMETER CONDITIONS MIN TYP MAX UNITS V Operating Voltage l 2.7 6 V IN I Shutdown Current SHDN = 0V l 10 20 m A VIN I Operating Current I = I = 0mA l 1.5 2 mA VIN VPCA VPCB V V R = 400W , Enabled l 0 0.1 V PCA/B OL LOAD V Dropout Voltage I = 6mA, V = 2.7V l V 0.25 V PCA/B LOAD IN IN V Output Current V = 2.4V, V = 2.7V, D V = 10mV l6mA PCA/B PCA/B IN OUT V Enable Time SHDN = High (Note 5) l 911 m s PCA/B V Bandwidth C = 33pF, R = 400 (Note 7) PCTL < 80mV 250 kHz PCA/B LOAD LOAD PCTL > 160mV 130 kHz V Load Capacitance (Note 6) l 100 pF PCA/B V Slew Rate V = 2V Step, C = 100pF, R = 400 (Note 3) 1.4 V/m s PCA/B PCTL LOAD LOAD V V Droop Unity Gain, V = 2V, V = High 1 m V/ms PCA/B HOLD PCTL HOLD V Time Time from V High to Hold Switch Opening 100 ns HOLD HOLD V Start Voltage Open Loop l 250 450 550 mV PCA/B V Voltage Clamp PCTL = 1V, V = 5V l 3.6 4 4.4 V PCA/B IN SHDN, V , BSEL Input Threshold Low V = 2.7V to 6V l 0.35 V HOLD IN SHDN, V , BSEL Input Threshold High V = 2.7V to 6V l 1.4 V HOLD IN SHDN, BSEL, V Input Current SHDN, BSEL, V = V = 3.6V l 16 24 36 m A HOLD HOLD IN PCTL Input Voltage Range (Note 4) l 0 2.4 V PCTL Input Resistance l 60 90 120 kW 4403f 2 U WWW