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LTC2903CS6-E1#PBF

Description
Monitoring circuit LTC2903-1 - Precision Quad Supply Monitor in 6-Lead SOT-23
CategoryPower/power management    The power supply circuit   
File Size155KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric View All

LTC2903CS6-E1#PBF Overview

Monitoring circuit LTC2903-1 - Precision Quad Supply Monitor in 6-Lead SOT-23

LTC2903CS6-E1#PBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionVSSOP,
Contacts6
Manufacturer packaging code05-08-1636
Reach Compliance Codecompliant
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G6
JESD-609 codee3
length2.9 mm
Humidity sensitivity level1
Number of channels4
Number of functions1
Number of terminals6
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeVSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1 mm
Nominal supply voltage (Vsup)5 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.95 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width1.625 mm
LTC2903-1
Precision Quad Supply
Monitor in 6-Lead SOT-23
FEATURES
DESCRIPTIO
Ultralow Voltage Reset: V
CC
= 0.5V Guaranteed
Monitor Four Inputs Simultaneously
3.3V, 2.5V, 1.8V, ADJ (LTC2903-A1)
5V, 3.3V, 2.5V, 1.8V (LTC2903-B1)
5V, 3.3V, 1.8V, –5.2V (LTC2903-C1)
3.3V, ADJ, ADJ, ADJ (LTC2903-D1)
5V, ADJ, ADJ, ADJ (LTC2903-E1)
Guaranteed Threshold Accuracy:
±1.5%
of
Monitored Voltage over Temperature
10% (A1, B1, C1) and 5% (D1, E1) Undervoltage
Monitoring
Low Supply Current: 20µA Typical
200ms Reset Time Delay
Active Low Open-Drain RST Output
Power Supply Glitch Immunity
Low Profile (1mm) SOT-23 (ThinSOT
TM
) Package
The LTC
®
2903-1 monitors up to four supply voltages. The
common reset output remains low until all four inputs
have been in compliance for 200ms. Voltage thresholds
maintain
±1.5%
accuracy over temperature (with respect
to the monitored voltage). The LTC2903-1 features an
open-drain RST output with a weak internal pullup.
Internal supply voltage (V
CC
) is generated from the greater
voltage on the V1, V2 inputs. V
CC
= V1 for LTC2903-D1 and
LTC2903-E1. The RST output is guaranteed to sink at least
5µA (V
OL
= 0.15V) for V
CC
down to 0.5V and will typically
conduct current down to 0V. Quiescent current is 20µA
typical, making the LTC2903-1 ideal for power conscious
systems. The LTC2903-1 is available in a 6-lead low profile
(1mm) SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
APPLICATIO S
Multivoltage Systems
Optical Networking Systems
Cell Phone Base Stations
Network Servers
TYPICAL APPLICATIO
5V
Low Voltage Reset Pull-Down Performance
vs External Pull-Up Current and Input Supply Voltage
0.10
0.09
3.3V
DC/DC
2.5V
CONVERTER
1.8V
LTC2903-B1
RST
V1
GND
V2
V4
V3
2903 TA01
RESET PIN VOLTAGE (V)
SYSTEM
LOGIC
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
1µA
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
V
IN
, INPUT SUPPLY VOLTAGE (V)
1
2µA
5µA
20µA
10µA
C1
0.1µF
C2
0.1µF
U
V
IN
= V1 = V2 = V3
LTC2903-B1
2903 TA01b
U
U
29031f a
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