LTC2914CDHC-1 データシートの表示（PDF） - Linear Technology

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LTC2914CDHC-1

Quad UV/OV Positive/Negative Voltage Monitor

Linear Technology 

FEATURES

n Monitors Four Voltages Simultaneously

n Adjustable UV and OV Trip Values

n Guaranteed Threshold Accuracy: ±1.5% of

Monitored Voltage over Temperature

n Input Glitch Rejection

n Monitors up to Two Negative Voltages

n Buffered 1V Reference Output

n Adjustable Reset Timeout with Timeout Disable

n 62μA Quiescent Current

n Open-Drain OV and UV Outputs

n Guaranteed OV and UV for VCC ≥ 1V

n Available in 16-Lead SSOP and 16-Lead

(5mm × 3mm) DFN Packages

APPLICATIONS

n Desktop and Notebook Computers

n Network Servers

n Core, I/O Voltage Monitors

LTC2914

Quad UV/OV

Positive/Negative

Voltage Monitor

DESCRIPTION

The LTC®2914 is a quad input voltage monitor intended for

monitoring multiple voltages in a variety of applications.

Dual inputs for each monitored voltage allow monitoring

four separate undervoltage (UV) conditions and four

separate overvoltage (OV) conditions. All monitors share a

common undervoltage output and a common overvoltage

output. The LTC2914-1 has latching capability for the

overvoltage output. The LTC2914-2 has functionality to

disable both the overvoltage and undervoltage outputs.

Polarity selection and a buffered reference allow monitoring

up to two separate negative voltages. A three-state input pin

allows setting the polarity of two inputs without requiring

any external components. Glitch filtering ensures reliable

reset operation without false or noisy triggering.

The LTC2914 provides a precise, versatile, space-con-

scious, micropower solution for voltage monitoring.

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

Quad UV/OV Supply Monitor,10% Tolerance, 5V, 3.3V, 2.5V, 1.8V

5V

3.3V

P0WER

SUPPLIES

2.5V

1.8V

0.1μF

44.2k

1k

4.53k

27.4k

1k

4.53k

19.6k

1k

4.53k

VCC

VH1

SEL

VL1

OV

VH2

LTC2914-1

VL2

UV

SYSTEM

REF

VH3

12.4k

LATCH

VL3

VH4

1k

VL4

GND

4.53k

TMR

CTMR

2914 TA01a

22nF

TIMEOUT = 200ms

0.505

0.504

0.503

0.502

0.501

0.500

0.499

0.498

0.497

0.496

0.495

–50

Input Threshold Voltage

vs Temperature

–25 0 25 50

TEMPERATURE (°C)

75 100

2914 TA01b

2914fa

1

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