LTC1550L LINER [Linear Technology], LTC1550L Datasheet
LTC1550L
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LTC1550L Summary of contents
Page 1
... Each device includes a TTL compatible Shutdown pin which drops supply current to 0.2 A typically. The LTC1550L Shutdown pin is active low (SHDN), while the LTC1551L Shutdown pin is active high (SHDN). Only four external components are required: an input bypass capacitor, two 0 ...
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... Lead Temperature (Soldering, 10 sec)................. 300 TOP VIEW SHDN OUT S8 PACKAGE 8-LEAD PLASTIC SO *SHDN FOR LTC1550L, SHDN FOR LTC1551L *FOR ADJUSTABLE VERSION T = 150 C, = 135 C/W JMAX JA ORDER PART NUMBER LTC1550LCS8 LTC1550LCS8-2 LTC1550LCS8-2.5 LTC1550LCS8-4.1 LTC1551LCS8 LTC1551LCS8-4 unless otherwise specified. (Note 3) OUT ...
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... OUT CC Note 3: The LTC1550LC/LTC1551LC are guaranteed to meet specified performance from and are designed, characterized and expected to meet these extended temperature limits, but are not tested at – and 85 C. The LTC1550LI is guaranteed to meet the extended temperature limits. LTC1550L/LTC1551L A MIN ...
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... Supply Voltage – –2.5V OUT OUT –4.1V OUT 0 2.25 2.75 3.25 3.75 4.25 4.75 SUPPLY VOLTAGE (V) 1550L/51L G04 Startup Time (LTC1550L Shown) 5V SHDN OUT – 4.1V 5V POWER VALID 0V 0.2ms/DIV 4 Supply Current vs Temperature 5 – 4.1V OUT 4.5 4.0 3.5 3.0 2.5 –55 –35 – ...
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... 5mA OUT 0 –10 100k 1M 10M FREQUENCY (Hz) 1550L/51L G14 LTC1550L/LTC1551L Output Spectrum (See Figure 5mA 2 4.7 F OUT 0 –10 100k 1M 10M ...
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... The ground connection for the output capacitor 6 should connect directly to the V capacitors, as well as to the GND of the LTC1550L/ (GND for LTC1551L), LTC1551L. LTC recommends a separate trace for the V capacitor ground connection to minimize noise. ...
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... Consult the graph provided in the Typical Performance Characteristics section and the Electrical Characteristics table for guaranteed test points. The LTC1550L/LTC1551L are ideal for use as bias voltage ...
Page 8
... CP pacitor must employ star-ground techniques at the GND pin of the LTC1550L/LTC1551L. Proper capacitor selec- pin. Output ripple is tion is critical for optimum performance of the LTC1550L/ LTC1551L. Output Ripple vs Output Capacitor Figure 4 shows the effect of using different output capaci- tor values on the LTC1550L/LTC1551L output ripple. ...
Page 9
... V OUT – 4. OUT 0.1 F 1550L/51L F03 Figure 4. Output Ripple vs Output Capacitance V OUT AC COUPLE 2mV/DIV 1550L/51L F05 Figure 6. Output Ripple with 10 F Tantalum Capacitor Paralleled with 0.1 F Ceramic Capacitor LTC1550L/LTC1551L 2 WITHOUT 0 WITH 0.1 F ...
Page 10
... Output Ripple vs Input Bypass Capacitor The input bypass capacitor (C ) can also have a fairly IN significant impact on the output ripple the LTC1550L/LTC1551L’s supply current while it is charging the flying capacitor (C1). Inadequate input bypassing can cause the V supply to dip when the CC charge pump switches, causing the output linear regulator to momentarily stop regulating ...
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... DWG # 05-08-1660) 0.040 0.006 0.034 0.004 (1.02 0.15) (0.86 0.102) SEATING PLANE 0.012 0.006 0.004 (0.30) (0.15 0.102) 0.0256 REF (0.65) BSC LTC1550L/LTC1551L 0.189 – 0.196* (4.801 – 4.978) 0.009 (0.229 REF 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.0098 (0.102 – ...
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... McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com 1mV Ripple, – 2V Output GaAs FET Bias Generator P-P 10k 1 8 REG SHDN REG 5.25V OUT LTC1550L-2 0 GND 4 5 – OUT – OUT ...