LTC2914IGN-2 Linear Technology, LTC2914IGN-2 Datasheet
LTC2914IGN-2
Specifications of LTC2914IGN-2
Available stocks
Related parts for LTC2914IGN-2
LTC2914IGN-2 Summary of contents
Page 1
... The LTC2914 provides a precise, versatile, space-con- scious, micropower solution for voltage monitoring. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 0.1μF ...
Page 2
... LTC2914HDHC-1#PBF LTC2914HDHC-1#TRPBF LTC2914CDHC-2#PBF LTC2914CDHC-2#TRPBF LTC2914IDHC-2#PBF LTC2914IDHC-2#TRPBF LTC2914HDHC-2#PBF LTC2914HDHC-2#TRPBF LTC2914Cgn-1#PBF LTC2914CGN-1#TRPBF LTC2914ign-1#PBF LTC2914IGN-1#TRPBF LTC2914Hgn-1#PBF LTC2914HGN-1#TRPBF 2 (Notes 1, 2) Operating Temperature Range LTC2914C ................................................ 0°C to 70°C LTC2914I.............................................. –40°C to 85°C + 0.3V) LTC2914H .......................................... –40°C to 125°C CC Storage Temperature Range ................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) SSOP ................................................................ 300° ...
Page 3
... LEAD FREE FINISH TAPE AND REEL LTC2914Cgn-2#PBF LTC2914CGN-2#TRPBF LTC2914ign-2#PBF LTC2914IGN-2#TRPBF LTC2914Hgn-2#PBF LTC2914HGN-2#TRPBF Consult LTC Marketing for parts specified with wider operating temperature ranges.*The temperature grade is identified by a label on the shipping container Consult LTC Marketing for information on non-standard lead based finish parts. ...
Page 4
LTC2914 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T DIS = Open unless otherwise noted. (Note 2) SYMBOL PARAMETER V Timer Disable Voltage TMR(DIS) V Output Voltage High UV/ Output Voltage Low UV/OV OL Three-State Input SEL ...
Page 5
TIMING DIAGRAMS VHn Monitor Timing V VHn UOT t UOD UV 1V VHn Monitor Timing (TMR Pin Strapped VHn UOT t t UOD UOD UV 1V NOTE: WHEN AN INPUT IS CONFIGURED AS A NEGATIVE SUPPLY MONITOR, ...
Page 6
LTC2914 TYPICAL PERFORMANCE CHARACTERISTICS Specifications are 25° 3.3V unless otherwise noted Shunt Voltage 6.75 6.65 6.55 25°C 6.45 –40°C 85°C 6.35 6.25 – ...
Page 7
PIN FUNCTIONS DIS (Pin 13, LTC2914-2): Output Disable Input. Disables the OV and UV output pins. When DIS is pulled high, the OV and UV pins are not asserted except during a UVLO condition. Pin has a weak (2µA) internal ...
Page 8
LTC2914 BLOCK DIAGRAM VH1 – – VL1 + 2 VH2 – – VL2 + 4 VH3 – – VL3 + 6 VH4 – – VL4 + 8 0.5V REF 10 1V BUFFER ...
Page 9
APPLICATIONS INFORMATION Voltage Monitoring The LTC2914 is a low power quad voltage monitoring cir- cuit with four undervoltage and four overvoltage inputs. A timeout period that holds asserted after all faults have cleared is adjustable using an ...
Page 10
LTC2914 APPLICATIONS INFORMATION For positive supply monitoring nal operating voltage the desired nominal current nd through the resistive divider the resistive divider na current calculated using the 1% resistor R desired overvoltage trip point ...
Page 11
APPLICATIONS INFORMATION 3. Determine R to complete the design. C –5V – − 46.4k − 8.45k ≈ 549k C 9.947µ REF LTC2914 46.4k VH3 8.45k VL3 ...
Page 12
LTC2914 APPLICATIONS INFORMATION Threshold Accuracy Reset threshold accuracy is important in a supply-sensitive system. Ideally, such a system resets only if supply voltages fall outside the exact thresholds for a specified margin. All LTC2914 inputs have a relative threshold accuracy ...
Page 13
APPLICATIONS INFORMATION low leakage. Capacitor leakage current must not exceed the minimum TMR charging current of 1.3µA. Tying the TMR pin to V bypasses the timeout period. CC Undervoltage Lockout When V falls below 2V, the LTC2914 asserts an CC ...
Page 14
LTC2914 TYPICAL APPLICATIONS Quad UV/OV Supply Monitor, 10% Tolerance, 5V, 3.3V, 2.5V, 1.8V P0WER SUPPLIES P0WER SUPPLIES 14 5V 3.3V 2.5V 1.8V C 0.1μF BYP 44. VH1 LTC2914-1 27.4k 1k ...
Page 15
TYPICAL APPLICATIONS Triple UV/OV Supply Monitor Powered from 48V, 10% Tolerance, 48V, 5V, 2.5V P0WER SUPPLIES 48V R Z 8.25k 5V 2.5V C 0.1μF BYP 475k CC 1 VH1 SEL 44.2k ...
Page 16
LTC2914 PACKAGE DESCRIPTION 3.50 ±0.05 1.65 ±0.05 2.20 ±0.05 (2 SIDES) 0.25 ± 0.05 0.50 BSC 4.40 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC PACKAGE ...
Page 17
... Updated equations and added Negative Voltage Monitoring Example 2 to Applications Information section 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. ...
Page 18
... DFN Packages www.linear.com l 510Ω 510Ω LED LED SYSTEM 2914 TA06 Pin, RST/RST Outputs CC , Adjustable Reset Timer CC Pin, Adjustable Reset Timer, 8-Lead TSOT-23 and CC LT 1010 REV B • PRINTED IN USA LINEAR TECHNOLOGY CORPORA TION 2006 2914fb ...