LTC1728HS55#PBF Linear Technology, LTC1728HS55#PBF Datasheet
LTC1728HS55#PBF
Specifications of LTC1728HS55#PBF
Related parts for LTC1728HS55#PBF
LTC1728HS55#PBF Summary of contents
Page 1
... The LTC1727 is available in an 8-lead MSOP or SO package and the LTC1728 is available in a 5-lead SOT-23 package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Triple Supply Monitor with Power Good Output ...
Page 2
LTC1727/LTC1728 BSOLUTE ................... – 0. CC3 CC5 CC25 CC18 CCA RST ........................................................... – 0. COMPA, COMP3, COMP25/COMP5 (MS8 and SO-8 Only) ............................ ...
Page 3
ELECTRICAL CHARACTERISTICS apply over the full operating temperature range, otherwise specifications are 2.5V unless otherwise noted. CC25 CCA CC3 SYMBOL PARAMETER I V Supply Current VCC3 CC3 I V Supply Current VCC25 CC25 ...
Page 4
LTC1727/LTC1728 ELECTRICAL CHARACTERISTICS LTC1728-3.3 The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are 25° 3.3V 1.8V CC3 CC18 CCA SYMBOL PARAMETER V Reset Threshold V ...
Page 5
W U TYPICAL PERFOR A CE CHARACTERISTICS V Input Current CCA vs Input Voltage 2 25°C A 1.5 1.0 0.5 0 – 0.5 –1.0 –1.5 – 2.0 0.80 0.85 0.95 1 1.05 1.15 1.20 0.90 1.10 INPUT VOLTAGE ...
Page 6
LTC1727/LTC1728 W U TYPICAL PERFOR A CE CHARACTERISTICS V Threshold Voltage CC25 vs Temperature (LTC1727-2.5/LTC1728-2.5) 2.3750 2.3675 2.3600 2.3525 2.3450 2.3375 2.3300 2.3225 2.3150 2.3075 2.3000 – –40 – TEMPERATURE (°C) 1727/28 G10 ...
Page 7
CTIO S (LTC1727/LTC1728) V (Pin 1/Pin 5): 3.3V Sense Input and Power CC3 Supply Pin. (3V Sense Input and Power Supply Pin for LTC1728-1.8.) This pin provides power to the part when the voltage on ...
Page 8
LTC1727/LTC1728 W BLOCK DIAGRA CC3 POWER DETECT V / CC5 2 V CC25 V 3 CCA GND 4 8 LTC1727-5/LTC1727-2.5 – INTERNAL CC – + 200ms PULSE GENERATOR – 200ms DELAY + BANDGAP REFERENCE V ...
Page 9
W BLOCK DIAGRA CC3 POWER DETECT V / CC5 CC25 V CC18 V 3 CCA GND DIAGRA V RST COMPX LTC1728-5/LTC1728-2.5/LTC1728-1.8/LTC1728-3.3 – INTERNAL CC – ...
Page 10
LTC1727/LTC1728 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 ...
Page 11
U U APPLICATIO S I FOR ATIO Override Functions (5V Versions Only) The V pin, if unused, can be tied to either V CCA This is an obvious solution since the trip points for V and V will always be ...
Page 12
LTC1727/LTC1728 U U APPLICATIO S I FOR ATIO Figure 4 contains a simple circuit for 5V systems that can’t risk the RST output going high in the 3.1V to 4.15V range (possibly due to very slow rise time on the ...
Page 13
U TYPICAL APPLICATIO S ADJUSTABLE SUPPLY ADJUSTABLE SUPPLY ADJUSTABLE RESET TRIP THRESHOLD 2.74V Dual Supply Monitor (3.3V and 5V, Defeat V LTC1728 3.3V V RST SYSTEM RESET CC3 CC5 3 V CCA 2 GND 1727/28 ...
Page 14
LTC1727/LTC1728 PACKAGE DESCRIPTIO 0.889 ± 0.127 (.035 ± .005) 5.23 3.20 – 3.45 (.206) (.126 – .136) MIN 0.42 ± 0.038 0.65 (.0165 ± .0015) (.0256) TYP BSC RECOMMENDED SOLDER PAD LAYOUT .050 BSC .245 MIN .030 ±.005 TYP RECOMMENDED ...
Page 15
... SC-74A (EIAJ) FOR ORIGINAL JEDEC MO-193 FOR THIN Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U ...
Page 16
... Have 1.221V Reference and Adjustable Hysteresis Meets PCI t Timing Specifications FAIL 1.182V Reference, 300nA Supply Current, 8-Pin MSOP Adjustable RESET and Watchdog Time Outs Adjustable RESET and Watchdog Time Outs Push-Pull RESET Output, SOT-23 LT 0207 REV B • PRINTED IN THE USA © LINEAR TECHNOLOGY CORPORATION 1999 17278fb ...