LTC1551 LINER [Linear Technology], LTC1551 Datasheet
LTC1551
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LTC1551 Summary of contents
Page 1
... Each device includes a TTL compatible Shutdown pin which drops supply current to 0.2 A typi- cally. The LTC1550 Shutdown pin is active low (SHDN), while the LTC1551 Shutdown pin is active high (SHDN). Only four external components are required: an input bypass capacitor, two 0.1 F charge pump capacitors and a filter capacitor at the linear regulator output ...
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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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... Output Voltage vs Output Current (LTC1550CS8-4.1/LTC1551CS8-4.1) –3 –3.2 –3 4.5V CC –3 –3.8 –4.0 V –4 ...
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... LTC1550/LTC1551 W U TYPICAL PERFORMANCE CHARACTERISTICS Maximum Output Current vs Supply Voltage 4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50 SUPPLY VOLTAGE (V) LTC1550/51 • TPC04 Load Transient Response (See Figure 5V) CC 5mV/DIV V OUT AC COUPLED 10mA I OUT 0mA 1ms/DIV LTC1550/51 • G07 Output Spectrum ...
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... LTC1551. When this pin (GND for LTC1551), the CC LTC1550 operates normally. When SHDN is pulled low (high for LTC1551), the LTC1550 enters shutdown mode. In shutdown, the charge pump stops, the output collapses to 0V, and the quiescent current drops typically to 0 Power Supply. V ...
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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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... The LTC1550/LTC1551 requires four external capacitors: an input bypass capacitor, two 0.1 F charge pump capaci- tors and an output filter capacitor. The overall behavior of the LTC1550/LTC1551 is strongly affected by the capaci- tors used. In particular, the output capacitor has a signifi- cant effect on the output ripple and noise performance. ...
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... The energy in these spikes is very small and they do not contribute to the RMS output voltage, but their peak-to-peak amplitude can be several SHDN SENSE OUT + C IN LTC1551 4 GND 4 5 – OUT + OPTIONAL 0 Figure 2 ...
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... Output Ripple vs Input Bypass Capacitor The input bypass capacitor (C ) can also have a fairly IN significant impact on the output ripple the LTC1550/LTC1551’s supply current while it is charging the flying capacitor (C1). Inadequate input bypass can cause the V supply to dip when the charge pump CC ...
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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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... LTC1550/LTC1551 U TYPICAL APPLICATION < 1mV 1 SHDN 4. OUT RELATED PARTS PART NUMBER DESCRIPTION ® LT 1054 Switched-Capacitor Voltage Converter with Regulator LTC1261 Switched-Capacitor Regulated Voltage Inverter LTC1429 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, – ...