LTC2939HMS datasheet(11/20 Pages) LINER

Part #	LTC2939HMS

Description	Confi gurable 4- and 6-Supply Monitors with Watchdog Timer

Download	20 Pages

Scroll/Zoom	100%

Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

Logo

11 / 20 page

LTC2938/LTC2939

11

293839ff

APPLICATIONS INFORMATION

A less accurate supervisor increases the required system

voltage margin and increases the probability of system

malfunction. The LTC2938 and LTC2939 ±1.5% speciﬁca-

tion improves the reliability of the system over supervisors

with wider threshold tolerances.

Monitor Conﬁguration

Select the LTC2938/LTC2939 input voltage combination

by placing the recommended resistive divider from VREF

to GND and connect the tap point to VPG, as shown in

Figure 2.

Table 1 offers recommended 1% resistor values for the

various modes. The rightmost column in Table 1 speciﬁes

optimum VPG/VREF ratios (±0.01), when conﬁguring with

a ratiometric DAC.

Table 1. Voltage Threshold Modes

MODE

V1 (V)

V2 (V)

V3 (V)

V4 (V)

R1 (kΩ)

R2 (kΩ)

VPG/VREF

0

5

3.3

ADJ

Open

Short

0

1

5

3.3

ADJ

–ADJ

93.1

9.53

0.094

2

3.3

2.5

ADJ

86.6

16.2

0.156

3

3.3

2.5

ADJ

–ADJ

78.7

22.1

0.219

4

3.3

1.8

1.5

ADJ

71.5

28

0.281

5

3.3

2.5

ADJ

66.5

34.8

0.344

6

5

3.3

2.5

1.8

59

40.2

0.406

7

3.3

1.8

1.5

1.2

53.6

47.5

0.469

8

3.3

1.8

1.2

ADJ

47.5

53.6

0.531

9

3.3

1.8

ADJ

40.2

59

0.594

10

3.3

2.5

1.8

1.5

34.8

66.5

0.656

11

3.3

2.5

1.8

ADJ

28

71.5

0.719

12

3.3

1.8

ADJ

–ADJ

22.1

78.7

0.781

13

3.3

1.5

ADJ

16.2

86.6

0.844

14

5

3.3

1.8

ADJ

9.53

93.1

0.906

15

3.3

1.2

ADJ

Short

Open

1

Upon power-up, the LTC2938 or LTC2939 enters a con-

ﬁguration period of approximately 150μs during which

the voltage on the VPG input is sampled and the monitor

is conﬁgured to the desired input combination. Do not

add capacitance to the VPG input. Immediately after

programming, the comparators are enabled and supply

monitoring begins.

Figure 2. Monitor Programming

R1

1%

R2

1%

293839 F02

VREF

VPG

GND

LTC2938/

LTC2939

Similar Part No. - LTC2939HMS

Manufacturer	Part #	Datasheet	Description
Linear Technology	LTC2939	259Kb / 20P	Confi gurable 4- and 6-Supply Monitors with Watchdog Timer
Linear Technology	LTC2939	259Kb / 20P	Confi gurable 4- and 6-Supply Monitors with Watchdog Timer

More results

Similar Description - LTC2939HMS

Manufacturer	Part #	Datasheet	Description
Linear Technology	LTC2938	259Kb / 20P	Confi gurable 4- and 6-Supply Monitors with Watchdog Timer
	LTC2939	259Kb / 20P	Confi gurable 4- and 6-Supply Monitors with Watchdog Timer
	LTC2932	245Kb / 16P	Confi gurable Six Supply Monitor with Adjustable Reset Timer and Supply Tolerance
	LTC2931	279Kb / 16P	Confi gurable Six Supply Monitor with Adjustable Reset and Watchdog Timers
	LTC2932	249Kb / 16P	Confi gurable Six Supply Monitor with Adjustable Reset Timer and Supply Tolerance
	LTC2931	269Kb / 16P	Confi gurable Six Supply Monitor with Adjustable Reset and Watchdog Timers
	LTC2930	169Kb / 12P	Confi gurable Six Supply Monitor with Adjustable Reset Timer, Manual Reset
	LTC2930	179Kb / 12P	Confi gurable Six Supply Monitor with Adjustable Reset Timer, Manual Reset
NXP Semiconductors	FS5600	2Mb / 111P	Automotive buck regulator and controller with voltage monitors and watchdog timer Rev. 3 - 2 August 2022
Mitsubishi Electric Sem...	M62055FP	87Kb / 6P	3V POWER SUPPLY with WATCHDOG TIMER

More results

LTC2939HMS Datasheet(PDF) 11 Page - Linear Technology

LTC2939HMS Datasheet(HTML) 11 Page - Linear Technology

Similar Part No. - LTC2939HMS

Similar Description - LTC2939HMS

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Datasheet Download

Link URL