LTC1550 Linear Technology, LTC1550 Datasheet
LTC1550
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LTC1550 Summary of contents
Page 1
... Output voltages are Typ P-P fixed at – 4.1V, with ripple voltages typically below 1mV The LTC1550 is also available in an adjustable output voltage version. The LTC1550/LTC1551 are ideal for use as bias voltage generators for GaAs transmitter FETs in portable RF and cellular telephone applications. ...
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... CP CC OUT + GND – OUT S8 PACKAGE 8-LEAD PLASTIC SO *SHDN FOR LTC1550, SHDN FOR LTC1551 T = 150 C, = 150 C/ W JMAX JA Consult factory for Military grade parts. ELECTRICAL CHARACTERISTICS V = 4.5V to 6.5V 0 OUT SYMBOL PARAMETER V Supply Voltage CC (LTC1550CGN/LTC1550IGN) (LTC1550CS8-4.1/LTC1551CS8-4.1) ...
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... V = – 4.1V OUT 925 875 825 775 725 675 –45 –25 – TEMPERATURE (˚C) LTC1550/51 G01 = unless otherwise specified. (Note 3) A CONDITIONS 3.05V V 6.5V 5mA CC OUT 3.45V V 6.5V 10mA CC OUT 4.1V V 6.5V 20mA CC OUT 3.45V V 6.5V 5mA ...
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... Line Transient Response (See Figure 10mA) L 5mV/DIV V OUT AC COUPLED 5. 2ms/DIV Spot Noise (*See Typical Application 0.1 0.01 10M 1 10 FREQUENCY (kHz) LTC1550/51 • G10 Startup Time (LTC1550 Shown) 5V SHDN OUT – 4.1V 0.2ms/DIV 6.25 6.50 LTC1550/51 G05 Minimum Required and I OUT OUT 6.0 5.6 5.2 4 20mA OUT 4 ...
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... CC CC 4.5V and 6.5V for the fixed voltage LTC1550CS8-4.1/ LTC1551CS8-4.1. The adjustable voltage LTC1550CGN/ LTC1550IGN operates with a VCC range of 2.7V to 6.5V. Output voltage and output load current conditions depend on the VCC supply voltage. Consult the Electrical Charac- teristics table and Typical Performance Characteristics for guaranteed test points ...
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... The LTC1550/LTC1551 are ideal for use as bias voltage generators for GaAs transmitter FETs in portable RF and cellular telephone applications. The LTC1550 features an active-low Shutdown pin (SHDN) that drops quiescent current to below 1 A. The LTC1551 is identical to the LTC1550, with the divided tap OUT + C ...
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... Shutdown pin is active-high (SHDN). All members of the LTC1550 family feature a 900kHz charge pump frequency. The LTC1550/ LTC1551 come standard with fixed – 4.1V output voltages and the LTC1550 is available with an adjustable output voltage. Both devices can be configured with other fixed output voltages; contact Linear Technology for more information ...
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... Figure 3. Output Ripple vs Output Capacitance V OUT AC COUPLE 2mV/DIV LTC1550/51 • F03 Figure 5. Output Ripple with 10 F Tantalum Capacitor Paralleled with 0.1 F Ceramic Capacitor 4.7 F WITHOUT 0 WITH 0 100 OUTPUT CAPACITANCE ( F) LTC1550/51 • F04 10 s/DIV LTC1550/51 • F04 ...
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... U switches, causing the output linear regulator to momentarily noise and output stop regulating. C P-P LTC1550/LTC1551 as possible and its value should be significantly larger than C1. Tantalum capacitors with low ESR generally provide adequate performance. Figure 6 shows the LTC1550/LTC1551 peak-to-peak output ripple taken using the test circuit in Figure 2 with 5mA ...
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... LTC1550/LTC1551 PACKAGE DESCRIPTION 0.0075 – 0.0098 (0.191 – 0.249) 0.016 – 0.050 (0.406 – 1.270) * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE ...
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... Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.228 – 0.244 (5.791 – 6.197) 0.053 – 0.069 (1.346 – 1.752) 0 – 8 TYP 0.014 – 0.019 (0.355 – 0.483) LTC1550/LTC1551 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157** (3.810 – 3.988) ...
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... Clock-Synchronized Switched-Capacitor Voltage Inverter Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com Ripple, – 4.1V Output GaAs FET Bias Generator P-P 8 SENSE 7 CP OUT C CP LTC1550 0 GND 5 – C1 FERRITE BEAD C OUT 0.1 F COMMENTS ...