LTC2935CTS8-3#TRPBF Linear Technology, LTC2935CTS8-3#TRPBF Datasheet

IC SUPERVISOR ULTRA LP TSOT23-8

LTC2935CTS8-3#TRPBF

Manufacturer Part Number
LTC2935CTS8-3#TRPBF
Description
IC SUPERVISOR ULTRA LP TSOT23-8
Manufacturer
Linear Technology
Type
Multi-Voltage Supervisorr
Datasheet

Specifications of LTC2935CTS8-3#TRPBF

Number Of Voltages Monitored
8
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
8 Selectable Threshold Combinations
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-8, TSOT-8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC2935CTS8-3#TRPBFLTC2935CTS8-3
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC2935CTS8-3#TRPBFLTC2935CTS8-3#TRMPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
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n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
500nA Quiescent Current
±1.5% (Max) Accuracy over Temperature
Integrated Precision Attenuators
Eight Pin-Selectable Reset Thresholds
Eight Pin-Selectable Power-Fail Thresholds
Early Warning Power-Fail Output
200ms Reset Timeout
Manual Reset Input
Compact 8-Lead, 2mm × 2mm DFN and
TSOT-23 (ThinSOT™) Packages
Portable Equipment
Battery-Powered Equipment
Security Systems
Point-of-Sale Devices
Wireless Systems
V
0.1μF
IN
Confi gurable Low Power Voltage Monitor
S2
S1
S0
MR
LTC2935-2
GND
V
CC
PFO
RST
POWERED
BATTERY
SYSTEM
LOGIC
2935 TA01a
THRESHOLD
LTC2935-1/LTC2935-2
RESET
3.30
3.15
3.00
2.85
2.70
2.55
2.40
2.25
(V)
Ultra-Low Power Supervisor
DESCRIPTION
The LTC
system initialization, power-fail warning and reset gen-
eration functions. Low quiescent current (500nA typical)
makes the LTC2935 an ideal choice for battery-operated
applications.
Three binary threshold-select inputs confi gure one of
eight integrated reset thresholds, ranging from 1.6V to
3.45V in pre-determined increments. Early warning of an
impending low voltage condition is provided at the power-
fail output (PFO), whose threshold is above the confi gured
reset threshold. Supervisory circuits monitor V
pull RST low when V
threshold. When V
condition, an internal reset timer is started after exceeding
the reset threshold by 5%. A 200ms reset timeout delays
the return of the RST output to a high state. A pushbut-
ton switch connected to the MR input is typically used to
force a manual reset. Outputs RST and PFO are available
with open-drain (LTC2935-1/LTC2935-3) or active pull-up
(LTC2935-2/LTC2935-4) circuits. Operating temperature
range is from –40°C to 85°C.
POWER-FAIL
THRESHOLD
with Power-Fail Output,
®
2935 ultra-low power voltage monitor provides
3.45
3.30
3.15
3.00
2.85
2.70
2.55
2.40
(V)
Selectable Thresholds
Falling Threshold Selection Table
THRESHOLD
CC
LTC2935-3/LTC2935-4
RESET
CC
2.44
2.32
2.20
2.08
1.96
1.84
1.72
1.60
(V)
is rising from an under-threshold
drops below the confi gured reset
POWER-FAIL
THRESHOLD
2.56
2.44
2.32
2.20
2.08
1.96
1.84
1.72
(V)
LTC2935
High High
High
High
High High High
Low
Low
Low
Low
S2
High High
High
Low
Low
Low
Low
S1
CC
High
High
Low
Low
Low
Low
2935fa
S0
1
and

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LTC2935CTS8-3#TRPBF Summary of contents

Page 1

... Point-of-Sale Devices n Wireless Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Confi gurable Low Power Voltage Monitor ...

Page 2

... EXPOSED PAD (PIN 9), PCB GND CONNECTION OPTIONAL ORDER INFORMATION Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL LTC2935CTS8-1#TRMPBF LTC2935CTS8-1#TRPBF LTC2935ITS8-1#TRMPBF LTC2935ITS8-1#TRPBF LTC2935CTS8-2#TRMPBF LTC2935CTS8-2#TRPBF LTC2935ITS8-2#TRMPBF LTC2935ITS8-2#TRPBF LTC2935CTS8-3#TRMPBF LTC2935CTS8-3#TRPBF LTC2935ITS8-3#TRMPBF LTC2935ITS8-3#TRPBF LTC2935CTS8-4#TRMPBF LTC2935CTS8-4#TRPBF LTC2935ITS8-4#TRMPBF LTC2935ITS8-4#TRPBF LTC2935CDC-1#TRMPBF LTC2935CDC-1#TRPBF LTC2935IDC-1#TRMPBF LTC2935IDC-1#TRPBF LTC2935CDC-2#TRMPBF LTC2935CDC-2#TRPBF LTC2935IDC-2#TRMPBF ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER V V Input Supply Voltage Input Supply Current CC CC Reset Thresholds (LTC2935-1/LTC2935-2) V Reset Threshold 1 (V Falling) RTF1 CC V Reset Threshold ...

Page 4

LTC2935 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER Reset and Power-Fail Outputs: RST, PFO V Voltage Output Low OL V Voltage Output High (LTC2935- Current Output High, Leakage (LTC2935- Reset Timeout ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs S0, S1, S2 Input Voltage 250 V = 3.6V CC 200 150 100 0.5 1 1.5 S0, S1, S2 INPUT VOLTAGE (V) PIN FUNCTIONS Exposed Pad (DFN Only): Exposed Pad may ...

Page 6

LTC2935 BLOCK DIAGRAM 900k TIMING DIAGRAM V PFT V RTF V CC PFO t RST RST – RESET DELAY + 0. – GND t RST t PD LTC2935-2/LTC2935-4 V ...

Page 7

APPLICATIONS INFORMATION VOLTAGE MONITORING Unmanaged power can cause various system problems. At power-up, voltage fl uctuation around critical thresholds can cause improper system or processor initialization. The LTC2935 provides power management capabilities for the system power-up phase. The supervisory device ...

Page 8

LTC2935 APPLICATIONS INFORMATION Selecting Output Logic Style The LTC2935 status outputs are available in two op- tions: open-drain (LTC2935-1/LTC2935-3) or active pull-up (LTC2935-2/LTC2935-4). The open-drain options (LTC2935-1/LTC2935-3) allow the outputs to be pulled user defi ned voltage ...

Page 9

TYPICAL APPLICATIONS + Li-Ion 0.1μF MANUAL PB1 RESET PUSHBUTTON *OPTIONAL RESISTOR FOR ADDED ESD PROTECTION + 1.5V + 1.5V + 1.5V + CR2032 Battery Monitor with Interface to Low Voltage Logic 3μA LDO IN OUT LT3009 SHDN GND ADJ 1.18M ...

Page 10

LTC2935 PACKAGE DESCRIPTION 2.55 ±0.05 0.64 ±0.05 1.15 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 BAR TOP MARK (SEE NOTE 6) 0.200 REF 10 DC Package 8-Lead ...

Page 11

... JEDEC PACKAGE REFERENCE IS MO-193 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. TS8 Package ...

Page 12

... TSOT-23 Packages, Adjustable via External Resistors www.linear.com ● 1.8V 1.18M 1μF 100k 590k LOW BATTERY EARLY WARNING 2935 TA05 Pin, Adjustable Threshold and Reset, CC Pin, Eight Inputs Two Negative Monitors CC Pin, Adjustable Reset Timer CC LT 0609 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 2935fa ...

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