LTC2932 Linear Technology, LTC2932 Datasheet
LTC2932
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LTC2932 Summary of contents
Page 1
... Each status output has a weak internal pull-up and may be externally pulled external voltage. The 52μA supply current makes the LTC2932 ideal for power conscious systems and the part may be confi gured to monitor less than six inputs. ...
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... VREF V4 Input Current (–ADJ Mode) ..............................–1mA RST, COMP1-6 Currents ......................................±10mA Operating Temperature Range LTC2932C ................................................ 0°C to 70°C LTC2932I..............................................– 40°C to 85°C LTC2932H ..........................................– 40°C to 125°C Storage Temperature Range ...................– 65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C ...
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... C = 1500pF RT V Less Than Reset Threshold by More n than 3mA SINK 100μ SINK –1μA n SOURCE LTC2932 MIN TYP MAX UNITS ● 2.300 2.338 2.375 V ● 2.238 2.275 2.313 V ● 2.175 2.213 2.250 V ● 2.113 2.150 2 ...
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... LTC2932 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER Digital Inputs T0, T1, RDIS V T0, T1 Low Level Input Voltage IL V T0, T1 High Level Input Voltage IH I T0, T1 Input Current INTOL RDIS Input Threshold Low V IL RDIS Input Threshold High ...
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... T = 25°C A 10k PULL-UP FROM RST 100 (V) RTX 2932 G07 LTC2932 V vs Temperature REF 75 100 125 2932 G02 Transient Duration vs Comparator Overdrive (V1,V2) 300 250 200 RESET OCCURS ABOVE CURVE 150 100 50 0 –50 0 ...
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... LTC2932 TYPICAL PERFORMANCE CHARACTERISTICS Reset Timeout Period 25° 100m 10m 1m 100μ 10μ 10p 100p 1n 10n 100n C (F) RT COMP Pull-Up Current 25°C A COMPn = GND www.DataSheet4U.com ( Supply Voltage ...
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... May be pulled greater than V2 using external pull-up. Leave open if unused. COMP2 (Pin 18): Comparator Output 2. Real-time logic output with weak 6μA pull-up to V2. Pulls high when V2 is above reset threshold. May be pulled greater than V2 using external pull-up. Leave open if unused. LTC2932 2932fb 7 ...
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... LTC2932 PIN FUNCTIONS V6 (Pin 19): Adjustable Voltage Input 6. High impedance comparator input with 0.5V typical threshold. See Applications Information for details. Tie unused. BLOCK DIAGRAM T0 9 BUFFER GAIN T1 ADJUST 11 VREF 14 VPG 13 A RESISTIVE DIVIDER V3 4 MATRIX www.DataSheet4U.com V RTA ...
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... A perfectly accurate supervisor for this supply generates a reset at exactly 4.75V, however no supervisor is this perfect. The actual reset threshold of a supervisor varies over a specifi ed band; the LTC2932 varies ±1.5% around its nominal threshold voltage (see Figure 1) over temperature. ...
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... V (V) R3 (kΩ) TRIP –2 –1.87 187 –5 –4.64 464 –4.87 487 –9.31 931 –11.30 1130 LTC2932 VREF TRIP Figure 4. Setting the Negative Adjustable Trip Point V (V) REF 1.210 1.178 1.146 1.113 R4 (kΩ) 100 100 100 ...
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... On power-down, once any of the monitor inputs drops below its threshold, RST is held at a logic low. A logic low of 0.4V is guaranteed until both V1 and V2 drop below 1V. If the bandgap reference becomes invalid (V typical), the LTC2932 will enter the 150μs setup period when V rises above 2.4V (max). CC ...
Page 12
... The LTC2932 monitors six supply voltages in Figure 5 and is confi gured to mode 6 (see Table 1). Supply tolerance inputs T0 and T1 are tied to RST. As the LTC2932 powers up, RST is low, which keeps the tolerance at 5%. After all six inputs exceed their 5% threshold voltages, RST pulls high ...
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... RST 100k 121k 1% 1% VREF R1 16. 86.6k 1% LTC2932 10k 10k COMP1 COMP2 COMP3 COMP4 COMP5 COMP6 T0 T1 LTC2932 RDIS VPG CRT GND 4.7nF t = 9.4ms RST 5V 3.3V 1.8V SYSTEM LOGIC –5.2V 2.5V DONE 12V SUPPLY STATUS 2932 F06 2932fb 13 ...
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... LTC2932 APPLICATIONS INFORMATION www.DataSheet4U.com Figure 7. Five Supply Power-Up Sequencing (Based on Circuit in Figure 3.3V 2.5V 1.8V –5.2V DONE RST 2932 FO7 2932fb ...
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... DRAWING NOT TO SCALE MILLIMETERS * DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH (INCHES) SHALL NOT EXCEED .152mm (.006") PER SIDE ** DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE LTC2932 6.40 – 6.60* (.252 – .260 6.40 (.252) BSC ...
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... Confi gurable Six Supply Monitor with Adjustable Reset and Watchdog Timers Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● Five Supply Adjustable Threshold Monitor with LED Indicators 0.1μF LTC2932 VREF CRT VPG ...