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LTC2965

100V Micropower Single

Voltage Monitor

FeaTures

n

DescripTion

The

LTC

®

2965

is a low current, high voltage single chan-

nel voltage monitor. Internal high value resistors sense

the input monitor pin providing a compact and low power

solution for voltage monitoring. Two comparator reference

inputs (INH and INL) are included to allow configuration of

a high and low threshold using an external resistive divider

biased from the on-chip reference. A range selection pin

is provided to set the internal resistive divider for 10x or

40x scaling. The thresholds are scaled according to the

range selection settings. Additionally, either INH or INL

can be grounded to enable built-in hysteresis. Polarity

selection pin allows the output to be inverted. The output

is 100V capable and includes a 500k pull-up resistor to

an internal supply.

L,

LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot

Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of

their respective owners.

Wide Operating Range: 3.5V to 100V

Wide Monitoring Range: 3.5V to 98V

Quiescent Current: 7µA

Adjustable Threshold Range

Internal High Value Resistive Dividers

±1.4% (Max) Threshold Accuracy Over Temperature

Polarity Selection

100V Rated Outputs

Selectable Built-In Hysteresis

16-Lead MS and 8-Lead 3mm × 3mm DFN Packages

Portable Equipment

Battery-Powered Equipment

Telecom Systems

Automotive/Industrial Electronics

applicaTions

n

Typical applicaTion

Undervoltage Monitor

24V

V

IN

REF

200k

THRESHOLD

CONFIGURATION

INH

91k

INL

909k

LTC2965

OUT

5V

V

IN

MONITOR RANGE

3.5V to 24.5V

14V to 98V

RANGE SELECTION

10x

40x

100k

24V UNDERVOLTAGE

5V

SYS

Supply Current vs V

IN

12

10

PS

RS GND

8

I

VIN

(µA)

6

4

2

RISING THRESHOLD

FALLING THRESHOLD

HYSTERESIS

RANGE

20.0V

18.2V

1.8V

10x

2965 TA01a

POLARITY AND RANGE SELECTION

0

RANGE = 40x

OUT = LOW

I

REF

= 0µA

0

20

40

60

V

IN

(V)

80

–45°C

25°C

90°C

125°C

100

2965 TA01b

2965f

For more information

www.linear.com/LTC2965

1

LTC2965

absoluTe MaxiMuM raTings

(Notes 1, 2)

Input Voltages

V

IN

....................................................... –0.3V to 140V

PS, RS ..................................................... –0.3V to 6V

INH, INL ................................................... –0.3V to 6V

Output Voltages

OUT ..................................................... –0.3V to 140V

Average Currents

V

IN

...................................................................–20mA

OUT ...................................................................±5mA

REF ....................................................................±5mA

Operating Ambient Temperature Range

LTC2965C ................................................ 0°C to 70°C

LTC2965I .............................................–40°C to 85°C

LTC2965H .......................................... –40°C to 125°C

Storage Temperature Range .................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec)................... 300°C

pin conFiguraTion

TOP VIEW

V

IN

1

REF 2

INH 3

INL 4

9

GND

8

7

6

5

OUT

GND

RS

PS

V

IN

NC

REF

INH

INL

1

2

3

4

5

6

7

8

TOP VIEW

16

15

14

13

12

11

10

9

OUT

NC

GND

RS

PS

DD PACKAGE

8-LEAD (3mm

×

3mm) PLASTIC DFN

T

JMAX

= 150°C,

θ

JA

= 43°C/W

EXPOSED PAD (PIN 9) PCB GND CONNECTION OPTIONAL

MS PACKAGE

16-LEAD PLASTIC MSOP

T

JMAX

= 150°C,

θ

JA

= 120°C/W

orDer inForMaTion

LEAD FREE FINISH

LTC2965CDD#PBF

LTC2965IDD#PBF

LTC2965HDD#PBF

LTC2965CMS#PBF

LTC2965IMS#PBF

LTC2965HMS#PBF

TAPE AND REEL

LTC2965CDD#TRPBF

LTC2965IDD#TRPBF

LTC2965HDD#TRPBF

LTC2965CMS#TRPBF

LTC2965IMS#TRPBF

LTC2965HMS#TRPBF

PART MARKING*

LGMK

2965

PACKAGE DESCRIPTION

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

16-Lead Plastic MSOP

TEMPERATURE RANGE

0°C to 70°C

–40°C to 85°C

–40°C to 125°C

0°C to 70°C

–40°C to 85°C

–40°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Consult LTC Marketing for information on nonstandard lead based finish parts.

For more information on lead free part marking, go to:

http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to:

http://www.linear.com/tapeandreel/

2965f

2

For more information

www.linear.com/LTC2965

LTC2965

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C. V

IN

= 12V, RS = GND, PS = GND,

INH = 1.2V, INL = GND (Notes 1, 2).

SYMBOL

V

IN

V

MON

I

VIN

V

UVLO

PARAMETER

Input Supply Operating Range

V

IN

Monitor Range

V

IN

Input Supply Current

Undervoltage Lockout

Undervoltage Lockout Hysteresis

Comparator Reference Input: INH, INL

Comparator Common Mode Voltage

V

CM

V

IN

Error Voltage at 96V

V

ERR

V

IN

Error Voltage at 24V

V

OS

AV

ERR

V

HYS

V

HYTH

t

PD

I

IN(LKG)

Comparator Offset Voltage

Internal Resistive Divider Range Error

Comparator Built-in Hysteresis

Built-in Hysteresis Enable Threshold

V

IN

to OUT Comparator Propagation Delay

Input Leakage Current (INH, INL)

CONDITIONS

V

IN

V

IN

= 100V, 40x

V

IN

Rising

V

IN

Falling

l

elecTrical characTerisTics

l

MIN

3.5

3

TYP

7

70

MAX

100

98

15

3

UNITS

V

µA

V

mV

V

mV

%

mV

µs

nA

V

µV

RMS

l

0.35

±250

±35

±1.9

14

–30

100

22

–22

40

±0.1

2.378

2.402

140

INH = V

REF

, 40x

0.35V ≤ INH ≤ 2.4V, 40x

INH = V

REF

, 10x

0.35V ≤ INH ≤ 2.4V, 10x

INH = 0.35, 10x

INH = 2.4V, Range = 10x, 40x

INH = GND, INL Rising, V

IN

= 24V

INL = GND , INH Falling, V

IN

= 24V

Overdrive = 10%, OUT Falling,10x

INH = GND, INL = 1.2V

V = 1.2V, I-Grade

V = 1.2V, H-Grade

I

REF

≤ 100µA, V

IN

≥ 3.5V

100Hz to 100kHz

l

2.45

±1360

±400

±315

±75

±3

±0.4

30

–14

175

80

±1

±10

2.426

Reference: REF

Reference Output Voltage

V

REF

Noise

Reference Output Noise

Control Inputs: RS, PS

Select Input Threshold

V

TH

Input Leakage Current

I

LKG

Status Outputs: OUT

Voltage Output Low

V

OL

V

OH

I

OH

I

O(LKG)

Voltage Output High

Output Current High

Leakage Current, Output High

l

0.4

V = 2.4V

V

IN

= 1.25V, I = 10µA

V

IN

= 3.5V, I = 500µA

V

IN

= 3.5V, I = –1µA

V

IN

≥ 4.5V, I = –1µA

V = GND, V

IN

= 3.5V

V = 100V, V

IN

= 6V

l

1.4

±100

100

400

2.75

4

–5

±250

V

nA

mV

V

µA

nA

l

2

2.8

–15

2.375

3

–7.5

Note 1:

Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2:

All currents into pins are positive; all voltages are referenced to

GND unless otherwise noted.

2965f

For more information

www.linear.com/LTC2965

3

LTC2965

Typical perForMance characTerisTics

Supply Current vs V

IN

12

10

8

I

VIN

(µA)

V

REF

(V)

6

4

2

0

RANGE = 40x

OUT = LOW

I

REF

= 0µA

0

20

40

60

V

IN

(V)

80

–45°C

25°C

90°C

125°C

100

2965 G01

V

REF

vs Temperature

2.412

2.408

2.425

2.404

2.400

2.396

2.375

2.392

2.388

–50 –25

2.350

V

REF

(V)

2.400

I = –10µA

2.450

V

REF

vs Load Current

V

IN

= 3.5V

–45°C

25°C

90°C

125°C

0

0.4

1.2

1.6

0.8

LOAD CURRENT (mA)

2.0

2965 G03

0

25 50 75 100 125 150

TEMPERATURE (°C)

2965 G02

2.450

V

REF

vs V

IN

25°C

0.4

% Range Error vs Temperature

1500

1000

RANGE ERROR, AV

ERR

(%)

Comparator V

OS

vs Temperature

V

INH(L)

= 1.2V

2.425

V

REF

(V)

0.2

500

V

OS

(µV)

10x

40x

0

25 50 75 100 125 150

TEMPERATURE (°C)

2965 G05

2.400

0

–500

–1000

–1500

–50 –25

2.375

1µA

100µA

1mA

3.0

3.5

3.2

V

INA

(V)

3.7

4.0

2965 G04

–0.2

2.350

2.7

–0.4

–50 –25

0

25 50 75 100 125 150

TEMPERATURE (°C)

2965 G06

V

IN

Falling Propagation Delay

vs % Overdrive

125

PROPAGATION DELAY, t

PD

(µs)

100

Built-In Hysteresis

vs Temperature

28

|BUILT-IN HYSTERESIS| V

HYS

(mV)

26

24

22

20

18

16

–50

V

INH(L)

= 1.2V

V

INL

= 1.2V

V

INH

= GND

V

IN

= 12V

75

50

–45°C

25°C

90°C

125°C

0.1

1

10

% OVERDRIVE (%)

100

2965 G10

25

0

50

100

TEMPERATURE (°C)

150

2965 G08

2965f

4

For more information

www.linear.com/LTC2965

LTC2965

Typical perForMance characTerisTics

Voltage Output High vs Pull-Down

Current (OUT)

4

V

IN

= 12V

1.50

1.25

Voltage Output Low vs Pull-Up

Current (OUT)

–45°C

25°C

90°C

125°C

Voltage Output High

vs Input Voltage

3.5

3.2

2.9

V

OH

(V)

2.6

2.3

2.0

1.7

I = –1µA

3

1.00

V

OH

(V)

2

V

OL

(V)

0.75

0.50

1

0

–45°C

25°C

90°C

125°C

0

–6

–9

–3

PULL-DOWN CURRENT (µA)

–12

2965 G09

0.25

0

1

2

3

4

PULL-UP CURRENT (mA)

5

2965 G10

3

4

5

V

IN

(V)

6

7

8

2965 G11

2965f

For more information

www.linear.com/LTC2965

5

LTC2965_15

LTC2965_15概述

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