LTC1556 LINER [Linear Technology], LTC1556 Datasheet
LTC1556
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LTC1556 Summary of contents
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... A soft start feature limits inrush current at turn-on, mitigating start-up problems that may result when the input is supplied by another low power DC/DC converter. The LTC1556 also includes an auxiliary LDO regulator/ power switch that may be used to power the frequency synthesizer or other low power circuitry. ...
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... CC V Output Voltage Output Ripple RATINGS Temperature Range LTC1555C/LTC1556C .............................. LTC1555I/LTC1556I ........................... – 0.3V) Extended Commercial Operating Temperature Range CC (Note 2) ............................................. – Lead Temperature (Soldering, 10 sec).................. 300 ORDER PART NUMBER CIN 1 RIN 2 LTC1555CGN ...
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... Note 2: C grade device specifications are guaranteed over the temperature range. In addition, C grade device specifications are assured , SIM digital pins floating, EN, FB pins tied to GND CC Shorted to GND = 5V LDO 5mA (LTC1556) CC LDO = 5V GND (LTC1556 1mA ...
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... LTC1555/LTC1556 W U TYPICAL PERFORMANCE CHARACTERISTICS Operating Current vs Input Voltage 120 NO EXTERNAL LOAD 100 – INPUT VOLTAGE (V) IN 1555/56 G01 V Output Voltage CC vs Input Voltage (3V Mode) 3 10mA VCC 3.1 OUT 3.0 2.9 2.8 2 ...
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... SIM RST contact. CLK (Pins 16/20): Level Shifted Clock Output Pin. Should be connected to the SIM CLK contact. Careful trace routing is recommended due to fast rise and fall edge speeds LTC1555/LTC1556 /Controller GND. Proper grounding IN pin. IN Output. This pin should CC contact. The V ...
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... BATT + CONTROLLER OPTIONAL LTC1555/LTC1556 LTC1556 ONLY 6 ground, the regulator acts switch between V and LDO. LDO (Pin 17): LDO Output Pin. This pin should be tied to the FB pin for 4.3V LDO operation. The 4.3V LDO output is usable only when V available when V used power switch if the FB pin is grounded or left floating ...
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... SIM and the controller. V Voltage Regulator CC The regulator section of the LTC1555/LTC1556 (refer to the Block Diagram) consists of a step-up/step-down charge pump DC/DC converter. The charge pump can operate over a wide input voltage range (2.7V to 10V) while maintaining a regulated V output ...
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... All SIMs and smart cards contain a clock input, reset input SIM V and a bidirectional data input/output. The LTC1555 CERAMIC LTC1556 provide level translators to allow controllers to communicate with the SIM (see Figures 3a and 3b). The CLK and RST inputs to the SIM are level shifted from the SIM controller supply rails ( ...
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... SIM side. Optional LDO Output The LTC1556 also contains an internal LDO regulator for providing a low noise boosted supply voltage for low power external circuitry (e.g., frequency synthesizers, etc.) Tying the FB pin to the LDO pin provides a regulated 4.3V at the LDO output (see Figure 4) ...
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... LTC1555/LTC1556 PACKAGE DESCRIPTION 0.007 – 0.0098 (0.178 – 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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... TYP 0.008 – 0.012 (0.203 – 0.305) LTC1555/LTC1556 0.337 – 0.344* (8.560 – 8.737 0.150 – 0.157** (3.810 – 3.988 0.004 – ...
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... Low Noise, Charge Pump Voltage Inverter LTC660 100mA Charge Pump DC/DC Converter 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 SIM Interface with Auxilary Power + V IN LTC1556 2.7V TO 10V 1 20 CIN CLK 2 19 RIN RST 3 ...