LTC1727 Linear Technology, LTC1727 Datasheet
LTC1727
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LTC1727 Summary of contents
Page 1
... CC requirements. Very low (10 A typical) supply current makes the LTC1727/ LTC1728 ideal for power conscious systems. The LTC1727 is available in an 8-lead MSOP or SO package and the LTC1728 is available in a 5-lead SOT-23 package. , LTC and LT are registered trademarks of Linear Technology Corporation. Triple Supply Monitor with Power Good Output ...
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... COMPA S8 PACKAGE 8-LEAD PLASTIC 125 C, = 150 C/W JMAX JA ORDER S8 PART NUMBER PART MARKING 172725 LTC1727ES8-2.5 727I25 LTC1727IS8-2.5 LTC1727ES8-5 17275 1727I5 LTC1727IS8-5 All except LTC1728-1.8. The = 3.3V CC3 CONDITIONS V Input Threshold CC3 V Input Threshold (5V Version) CC5 V Input Threshold (2.5V Version) CC25 ...
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... Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: All voltage values are with respect to GND. Note 3: The LTC1727E/LTC1728E are guaranteed to meet specified performance from and are designed, characterized and assured to meet the extended temperature limits of – but are not tested at these temperatures ...
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... G03 I vs Temperature VCC25 (LTC1727-2.5/LT1728-2.5) 1 3.3V CC3 1 2.5V CC25 V = 3.3V CCA 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 6 – 60 –40 – TEMPERATURE ( Temperature VCC5 (LTC1727-5/LTC1728- CC5 3.3V CC3 V = 3.3V CCA – 60 –40 – TEMPERATURE ( C) 100 ) CC 80 100 1727/28 G06 80 100 ...
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... Temperature (LTC1728-1.8) 2.845 2.835 2.825 2.815 2.805 2.795 2.785 2.775 2.765 100 – 60 1727/28 G15 LTC1727/LTC1728 V Threshold Voltage CC5 vs Temperature (LTC1727-5/LTC1728-5) 4.750 4.725 4.700 4.675 4.650 4.625 4.600 80 100 –60 –40 – TEMPERATURE ( C) 1727/28 G11 vs Temperature CC3 ...
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... CC5 CC25 CC18 ceramic capacitor. V (Pin 2/Pin 4): 5V Sense Input and Power Supply CC5 Pin. This pin is used on the LTC1727-5/LTC1728-5 to provide power to the part when the voltage on V greater than the voltage Bypass to ground with CC3 a 0.1 F ceramic capacitor. V (Pin 2/Pin 4): 2 ...
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... BLOCK DIAGRA CC3 POWER DETECT V / CC5 2 V CC25 V 3 CCA GND 4 LTC1727-5/LTC1727-2.5 – INTERNAL CC – + 200ms PULSE GENERATOR – 200ms DELAY + BANDGAP REFERENCE LTC1727/LTC1728 V CC3 COMP3 V CC3 6 A COMP25/ 7 COMP5 V CC3 RST V CC3 COMPA 1727 BD1 7 ...
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... LTC1727/LTC1728 W BLOCK DIAGRA CC3 POWER DETECT V / CC5 CC25 V CC18 V 3 CCA GND DIAGRA V RST COMPX 8 LTC1728-5/LTC1728-2.5/LTC1728-1.8 – INTERNAL CC – 200ms PULSE GENERATOR + – + BANDGAP REFERENCE V Monitor Timing CC V RTX CCX t RST CC3 RST ...
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... U U APPLICATIO S I FOR ATIO Supply Monitoring The LTC1727 is a low power, high accuracy triple supply monitoring circuit with three monitor outputs and a 200ms microprocessor reset output. The LTC1728 is a low power, high accuracy triple supply monitoring circuit with a single 200ms microprocessor reset output ...
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... CC5 to the voltage on V 25mV and the voltage on V CC3 less than 4.15V. In this manner, the LTC1727-5/ LTC1728-5 will behave as a 3.3V monitor and V capability will be disabled. The V trip point is reenabled when the voltage on V CC5 ...
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... 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 V (V) CC5 1727/28 F05 Figure 5. RST Output Voltage Characteristics of the Circuit in Figure 4 LTC1727/LTC1728 CC3 /V will always be greater than the trip CC25 CC18 . Likewise, the unused, can CCA CC25 CC18 . V must always be used. Tying V CC3 CC3 and operating off ...
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... LTC1727/LTC1728 U TYPICAL APPLICATIO S ADJUSTABLE SUPPLY OR DC/DC FEEDBACK DIVIDER ADJUSTABLE SUPPLY 12 Triple Supply Monitor (3.3V, 5V and Adjustable) LTC1728 3.3V V SYSTEM RESET RST CC3 CC5 R1 CCA 2 R2* GND 1727/28 TA03 *TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL COMBINATION OF R1 AND R2 66.5k Dual Supply Monitor (3.3V and 5V, Defeat V ...
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... R2* GND 1727/28 TA06 *TO PRESERVE THRESHOLD ACCURACY, SET PARALLEL COMBINATION OF R1 AND R2 66.5k Using V Tied to DC/DC Feedback Divider CCA 2.9V 35.7k LTC1435 LTC1728 3. CC3 OSENSE 4 2. CC5 CCA 2 22.1k GND ADJUSTABLE 1% RESET TRIP THRESHOLD 2.74V 1727/28 TA07 LTC1727/LTC1728 SYSTEM RESET 1 SYSTEM RESET RST 13 ...
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... LTC1727/LTC1728 PACKAGE DESCRIPTIO 0.007 (0.18) * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE 0.35 – ...
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... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LTC1727/LTC1728 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1 ...
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... LTC1727/LTC1728 U TYPICAL APPLICATIO MANUAL RESET BUTTON (NORMALLY OPEN) RELATED PARTS PART NUMBER DESCRIPTION LTC690 5V Supply Monitor, Watchdog Timer and Battery Backup LTC694-3.3 3.3V Supply Monitor, Watchdog Timer and Battery Backup LTC699 5V Supply Monitor and Watchdog Timer LTC1232 5V Supply Monitor, Watchdog Timer and Push-Button Reset LTC1326 Micropower Precision Triple Supply Monitor for 5V, 3 ...