LTC2905HDDB#TRPBF datasheet, PDF

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LTC2905HDDB#TRPBF: DescriptionIC PWR SUPPLY MONITOR DUAL 8DFN; CategoryPower/power management The power supply circuit; File Size148KB，16 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LTC2905HDDB#TRPBF Overview

IC PWR SUPPLY MONITOR DUAL 8DFN

LTC2905HDDB#TRPBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	DFN
package instruction	HVSON, SOLCC8,.08,20
Contacts	8
Manufacturer packaging code	DDB
Reach Compliance Code	compliant
ECCN code	EAR99
Other features	ALSO OPERATES ON SUPPLY VOLTAGE 2.5V
Adjustable threshold	YES
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-N8
JESD-609 code	e3
length	3 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	2
Number of terminals	8
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	HVSON
Encapsulate equivalent code	SOLCC8,.08,20
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	260
power supply	1,2.5 V
Certification status	Not Qualified
Maximum seat height	0.8 mm
Maximum supply voltage (Vsup)	3.465 V
Minimum supply voltage (Vsup)	3.135 V
Nominal supply voltage (Vsup)	1 V
surface mount	YES
technology	CMOS
Temperature level	AUTOMOTIVE
Terminal surface	Matte Tin (Sn)
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	2 mm

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FEATURES

LTC2904/LTC2905

Precision Dual Supply

Monitors with Pin-Selectable

Thresholds

DESCRIPTION

The LTC

2904/LTC2905 are dual supply monitors in-

tended for systems with two supply voltages. The dual

supply monitors have a common reset output with delay

(200ms for the LTC2904 and adjustable using an exter-

nal capacitor for the LTC2905). This product provides a

precise, space-conscious and micropower solution for

supply monitoring.

The LTC2904/LTC2905 feature a tight 1.5% threshold

accuracy over the whole operating temperature range, and

glitch immunity to ensure reliable reset operation without

false triggering. The open drain

RST

output is guaranteed

to be in the correct state for inputs down to 1V.

The LTC2904/LTC2905 also feature three programming

input pins, which program the threshold and tolerance level

without requiring any external components. These three

programming pins provide a total of 27 different voltage

level and tolerance combinations, eliminating the need to

have different parts for development and implementation

of different systems with different voltage levels requiring

monitoring function.

Monitors Two Inputs Simultaneously

Nine Threshold Combinations

Three Supply Tolerances (5%, 7.5%, 10%)

Guaranteed Threshold Accuracy:

±1.5%

Monitored Voltage Over Temperature

Internal V

Auto Select

Power Supply Glitch Immunity

200ms Reset Time Delay (LTC2904 Only)

Adjustable Reset Time Delay (LTC2905 Only)

Open Drain

RST

Output

Guaranteed

RST

for V1 ≥ 1V or V2 ≥ 1V

Low Proﬁle (1mm) SOT-23 (ThinSOT™) and

Plastic (3mm

2mm) DFN Packages

APPLICATIONS

Desktop and Notebook Computers

Handheld Devices

Network Servers

Core, I/O Monitor

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

5V, 3.3V Dual Supply Monitor with 5% Tolerance

DC/DC

CONVERTER

3.3V

SYSTEM

LOGIC

Table 1. Voltage Threshold Programming

5.0

3.3

2.5

1.8

1.5

1.2

1.8

1.5

1.2

1.0

Open

GND

Open

GND

Open

GND

0.1μF

TOL

LTC2905

0.1μF

TMR

22nF

GND

RST

3.3

2.5

29045 TA01

2.5

29045fd

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