LTC2962/LTC2963/LTC2964

±0.5% Accurate Quad

Configurable Supervisor

FEATURES

n

DESCRIPTION

The

LTC

®

2962

series of configurable power supply moni-

tors can supervise systems with up to four supply volt-

ages. One of 16 preset or adjustable voltage monitor

thresholds per channel can be selected using external 1%

resistors connected to the programming (PG) inputs. The

preset voltage thresholds are accurate to ±0.5% over tem-

perature. Positive (+ADJ) and negative (–ADJ) adjustable

inputs with a 0.5V threshold allow undervoltage, negative

voltage and overvoltage monitoring.

The watchdog (LTC2963 only) and reset timeout periods

are adjustable using external capacitors. Accurate volt-

age thresholds and comparator glitch immunity ensure

reliable reset operation without false triggering. The

RST

output is guaranteed to be in the correct state for V

CC

input voltage down to 1V.

The flexibility of the LTC2962 family provides the ability

to monitor a wide variety of power supply combinations,

including multiple supplies of the same voltage, with

±0.5% accuracy.

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. patents including 6967591, 7239251, 7119714.

n

Simultaneously Monitor Four Power Supplies

±0.5% Threshold Accuracy Over Temperature

Selectable –4% and –6% Thresholds per Supply:

5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1V and ±ADJ

Adjustable Reset (RST) Timeout

Overvoltage and Negative Voltage Monitoring

Push-Pull or Open-Drain

RST

Output

Margin Pin

RDIS

for Reset Disable

H-Grade Temperature Range

LTC2963

Non-Windowed (–1) Watchdog

Adjustable Watchdog Timer

Watchdog Status Output

WDO

Selectable Initial Watchdog Timeout

LTC2964

Individual Comparator Open-drain Outputs

16-Lead 3mm × 3mm QFN (LTC2962)

20-Lead 3mm × 4mm QFN (LTC2963, LTC2964)

APPLICATIONS

n

High Reliability Systems

Network, Telecom and Server Systems

Automotive Control Systems

TYPICAL APPLICATION

3.3V

2.5V

1.8V

1.5V

DC/DC

0.1µF

V

CC

V1

R5

30.1k

R4

20k

0 TO 5

1% CONFIGURATION

RESISTORS

R3

20k

R2

20k

R1

60.4k

REF

PG1

PG2

PG3

MR

PG4

GND

RT

C

RT

47nF

296234 TA01a

3.3V

2.5V

1.8V

1.5V

0.1µF

V2

V3

V4 DV

CC

SYSTEM

LOGIC

RST

RDIS

LTC2962

56ms RESET TIMEOUT

PERCENTAGE OF THRESHOLDS (%)

Typical Distribution of Monitor

Threshold Error

50

45

40

35

30

25

20

15

10

5

0

–0.2 –0.15 –0.1 –0.05 0 0.05 0.1 0.15 0.2

THRESHOLD ERROR (%)

296234 TA01b

494 PARTS ( 31616 TRESHOLDS )

MANUAL

RESET

Rev 0

Document Feedback

For more information

www.analog.com

1

LTC2962/LTC2963/LTC2964

ABSOLUTE MAXIMUM RATINGS

(Notes 1, 2)

V1 - V4,

MR, RDIS,

WDI, DV

CC

, V

CC

............ –0.3V to 6V

PG1 - PG4, REF ......................................... –0.3V to 1.5V

OUT1 - OUT4................................................ –0.3V to 6V

RT, WT, WDS ................................–0.3V to (V

CC

+ 0.3V)

RST, WDO

(DV

CC

≥ 1.6V) ........... –0.3V to (DV

CC

+ 0.3V)

RST, WDO

(DV

CC

= GND) ............................. –0.3V to 6V

Reference Load Current (I

REF

) ............................... ±1mA

RST, WDO,

OUT1 - OUT4 Currents ....................... ±10mA

Operating Temperature Range

C-Grade ................................................... 0°C to 70°C

I-Grade.................................................–40°C to 85°C

H-Grade ............................................. –40°C to 125°C

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

PIN CONFIGURATION

LTC2962

LTC2963

TOP VIEW

V1

V2

V3

V4

20 19 18 17

RDIS

1

16 REF

15 PG1

21

14 PG2

13 PG3

12 PG4

11 RT

7

WD0

8

WDI

9 10

WDS

WT

RDIS

1

MR

2

DV

CC

3

V

CC

4

RST

5

GND 6

7

OUT1

8

OUT2

9 10

OUT3

OUT4

21

LTC2964

TOP VIEW

V1

V2

V3

20 19 18 17

16 REF

15 PG1

14 PG2

13 PG3

12 PG4

11 RT

V4

TOP VIEW

V1

V2

V3

16 15 14 13

RDIS

1

MR

2

DV

CC

3

V

CC

4

5

RST

6

GND

7

RT

8

PG4

17

12 REF

11 PG1

10 PG2

9 PG3

V4

MR

2

DV

CC

3

V

CC

4

RST

5

GND 6

UD PACKAGE

16-LEAD (3mm

×

3mm) PLASTIC QFN

T

JMAX

= 125°C,



JA

= 68°C/W,



JC

= 7.5°C/W

EXPOSED PAD (PIN 17) PCB GND CONNECTION OPTIONAL

UDC PACKAGE

20-LEAD (3mm

×

4mm) PLASTIC QFN

T

JMAX

= 125°C,



JA

= 52°C/W,



JC

= 6.8°C/W

EXPOSED PAD (PIN 21) PCB GND CONNECTION OPTIONAL

UDC PACKAGE

20-LEAD (3mm

×

4mm) PLASTIC QFN

T

JMAX

= 125°C,



JA

= 52°C/W,



JC

= 6.8°C/W

EXPOSED PAD (PIN 21) PCB GND CONNECTION OPTIONAL

ORDER INFORMATION

TUBE

LTC2962CUD#PBF

LTC2962IUD#PBF

LTC2962HUD#PBF

LTC2963CUDC-1#PBF

LTC2963IUDC-1#PBF

LTC2963HUDC-1#PBF

LTC2964CUDC#PBF

LTC2964IUDC#PBF

LTC2964HUDC#PBF

TAPE AND REEL

LTC2962CUD#TRPBF

LTC2962IUD#TRPBF

LTC2962HUD#TRPBF

LTC2963CUDC-1#TRPBF

LTC2963IUDC-1#TRPBF

LTC2963HUDC-1#TRPBF

LTC2964CUDC#TRPBF

LTC2964IUDC#TRPBF

LTC2964HUDC#TRPBF

PART MARKING*

LGZZ

LHBC

LHBB

PACKAGE DESCRIPTION

16-Lead (3mm × 3mm) Plastic QFN

20-Lead (3mm × 4mm) Plastic QFN

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

0°C to 70°C

–40°C to 85°C

–40°C to 125°C

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

Tape and reel specifications.

Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.

Rev 0

2

For more information

www.analog.com

LTC2962/LTC2963/LTC2964

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C. V

CC

= 3.3V, DV

CC

= 0V,

MR

=

RDIS

= V

CC

, unless otherwise specified.

(Note 2)

SYMBOL PARAMETER

V

CC

Operating Range

Guaranteed

RST

Output Low

V

CCMINC

I

VCC

Minimum Required for Configuration

V

CC

Input Supply Current

DV

CC

Operating Range

DV

CC

Input Supply Current

V

RT50

V

RT33

V

RT25

V

RT18

V

RT15

V

RT12

V

RT10

V

RTA

V

REF

V

PG

I

MON

R

MON

t

UV

5V, –4% Reset Threshold

5V, –6% Reset Threshold

3.3V, –4% Reset Threshold

3.3V, –6% Reset Threshold

2.5V, –4% Reset Threshold

2.5V, –6% Reset Threshold

1.8V, –4% Reset Threshold

1.8V, –6% Reset Threshold

1.5V, –4% Reset Threshold

1.5V, –6% Reset Threshold

1.2V, –4% Reset Threshold

1.2V, –6% Reset Threshold

1.0V, –4% Reset Threshold

1.0V, –6% Reset Threshold

±ADJ Reset Threshold

Reference Voltage

PG1 to PG4 Configuration Voltage Range

Monitor Input Current for V1 - V4

Monitor Input Resistance for V1 - V4

Comparator Propagation Delay to

RST

or OUTn Falling Edge

RT and WT Pull-Up Current

RT and WT Pull-Down Current

t

RST

Reset Timeout Period

Internal Timer Select Level (WT and RT)

V

CC

-Detect Current in Internal Timer Mode (WT and RT) V = V

CC

LTC2963 Watchdog

t

WDU

t

WD(INIT)

V

WDS

Watchdog Upper Timeout Period

Initial Watchdog Timeout Period

C

WT

= 1500pF

WT Tied to V

CC

WDS = Logic Low

WDS = Open

WDS = Logic High

Logic Low

Open

Logic High

l

ELECTRICAL CHARACTERISTICS

CONDITIONS

l

MIN

2.25

l

TYP

MAX

5.5

1

2.2

UNITS

V

µA

V

nA

V

mV

V

nA

MΩ

µs

µA

ms

V

µA

ms

s

V

CC

Rising

V

CC

Rising

80

1.6

140

25

210

5.5

500

4.825

4.725

3.185

3.119

2.413

2.363

1.737

1.701

1.448

1.418

1.158

1.134

0.965

0.945

502.5

1.207

V

REF

±15

I

RST

= 0, I

WDO

= 0

l

4.775

4.675

3.152

3.087

2.388

2.338

1.719

1.683

1.433

1.403

1.146

1.122

0.955

0.935

497.5

1.183

0

0.8

4.8

4.7

3.168

3.102

2.4

2.35

1.728

1.692

1.44

1.41

1.152

1.128

0.96

0.94

500

1.195

V

CC

= 2.25V to 5.5V, I

REF

= ±1mA,

l

C

REF

≤ 1000pF

V

CC

> V

CCMINC

±ADJ Modes (Vn = 0.5V)

All Modes Except ±ADJ

Overdrive = 10%

V = GND

V = 1.3V

C

RT

= 1500pF

V

RT

= V

CC

l

1.2

20

1.6

40

–2.5

2.5

24

240

2

200

2

–1.5

1.5

12

160

V

CC

– 0.1

–2

2

18

200

1

100

1.3

150

1.6

t

WDU

8 • t

WDU

64 • t

WDU

WDS Input Level

(V

CC

= 2.25 to 5.5V)

0.7

V

CC

– 0.3

1.3

0.4

V

CC

– 0.7

V

Rev 0

For more information

www.analog.com

3

LTC2962/LTC2963/LTC2964

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C. V

CC

= 3.3V, DV

CC

= 0V,

MR

=

RDIS

= V

CC

, unless otherwise specified.

(Note 2)

I

WDS

I

WDS(HZ)

t

WDI,MAX

t

WP

t

WD

Logic I/O

V

OL

Voltage Output Low

RST, WDO

(Note 3)

RST

Only

Voltage Output Low OUTn (LTC2964, Note 4)

V

OH

I

OH

I

OPU

V

IL

V

IH

I

IL

t

MP

t

MD

Voltage Output High

RST, WDO

(Note 3)

Voltage Output High, OUTn (LTC2964, Note 4)

RST, WDO

Output Voltage High Leakage

RST, WDO

and OUTn Internal Pull-Up Current

RDIS, MR

and

WDI

Input Level Low

RDIS, MR

and

WDI

Input Level High

RDIS, MR

and

WDI

Internal Pull-up Current

MR

Input Pulse Width

MR

Input Propagation Delay

MR

Falling to

RST

Falling

I

SINK

= 3mA, V

CC

= 2.25V to 5.5V

I

SINK

= 100µA, V

CC

= 1.1V

I

SINK

= 5mA, V

CC

= 2.25V to 5.5V

I

SOURCE

= –200µA; DV

CC

= 3.3V

I

SOURCE

= –1µA

V = 5.5V, V

CC

= 5.5V or

V

CC

= GND

V = GND

V

CC

= 2.25 to 5.5V

V

CC

= 2.25 to 5.5V

V = GND

l

ELECTRICAL CHARACTERISTICS

WDS Input Current

Allowable WDS Leakage in Open State

Rise/Fall Time of WDI Edge

WDI Input Pulse Width

WDI to WDO Propagation Delay

V

WDS

= GND

V

WDS

= V

CC

l

–4

–2.6

2.6

4

±1

2

µA

µs

mV

V

CC

= 2.25V to 5.5V

l

2

0.5

40

10

50

0.7 • DV

CC

V

CC

– 1

100

–4

0.4

1.6

–16

150

0.1

1

–10

–4

–6

-10

150

60

300

nA

µA

V

µA

ns

µs

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.

Note 3:

The

RST

and

WDO

pins are push-pull outputs that swing to DV

CC

when DV

CC

is greater than 1.6V.

Note 4:

The output pins, OUT1 - OUT4, have internal pull-ups to V

CC

of

typically 6µA. However, external pull-up resistors may be used when faster

rise times are required or for V

OH

voltages greater than V

CC

.

Rev 0

4

For more information

www.analog.com

LTC2962/LTC2963/LTC2964

TIMING DIAGRAMS

Vn Monitor Timing

V

RTX

Vn

t

UV

t

RST

296234 TD01

Reset and Watchdog Timing (LTC2963)

Vn

RST

t

RST

t

RST

t

RST

t

WD(INIT)

t

RST

t

RST

t

RST

t

RST

WDO

t

WD(INIT)

t

WD(INIT)

t

WDU

WDI

POWER-ON RESET FOLLOWED BY

RESET CAUSED BY UNDERVOLTAGE

EVENT.

WATCHDOG OUTPUT SET HIGH,

WATCHDOG INPUT = DON’T CARE.

WATCHDOG INPUT NOT TOGGLED, INITIAL

WATCHDOG TIMER EXPIRES, WATCHDOG OUTPUT

PULLS LOW. RESET OUTPUT PULLS LOW FOR ONE

RESET TIMEOUT PERIOD.

WATCHDOG INPUT REMAINS UNTOGGLED,

WATCHDOG OUTPUT REMAINS LOW, RESET

OUTPUT PULLS LOW AGAIN AFTER ONE INITIAL

WATCHDOG TIMEOUT PERIOD. WATCHDOG

OUTPUT CLEARED BY UNDERVOLTAGE EVENT.

WATCHDOG INPUT NOT

TOGGLED, INITIAL WATCHDOG

TIMER EXPIRES, WATCHDOG

OUTPUT PULLS LOW. RESET

OUTPUT PULLS LOW.

WATCHDOG OUTPUT LOW

TIME SHORTENED BY

UNDERVOLTAGE EVENT

DURING RESET TIMEOUT.

WATCHDOG INPUT TOGGLED, INITIAL

WATCHDOG TIMER CLEARED.

WATCHDOG INPUT NOT TOGGLED,

WATCHDOG TIMER EXPIRES,

WATCHDOG OUTPUT PULLS LOW.

RESET OUTPUT PULLS LOW.

WATCHDOG OUTPUT NOT CLEARED

BY WATCHDOG INPUT DURING RESET

TIMEOUT. AFTER RESET COMPLETED,

WATCHDOG INPUT CLEARS

WATCHDOG OUTPUT.

296234 TD02

Rev 0

For more information

www.analog.com

5

参数名称	属性值
Brand Name	Analog Devices Inc
是否无铅	含铅
是否Rohs认证	符合
厂商名称	ADI(亚德诺半导体)
包装说明	HVQCCN,
针数	20
制造商包装代码	05-08-1752
Reach Compliance Code	compliant
可调阈值	YES
模拟集成电路 - 其他类型	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 代码	R-PQCC-N20
长度	4 mm
信道数量	1
功能数量	1
端子数量	20
最高工作温度	85 °C
最低工作温度	-40 °C
封装主体材料	PLASTIC/EPOXY
封装代码	HVQCCN
封装形状	RECTANGULAR
封装形式	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）	260
座面最大高度	0.8 mm
最大供电电压 (Vsup)	5.5 V
最小供电电压 (Vsup)	2.25 V
标称供电电压 (Vsup)	3.3 V
表面贴装	YES
技术	CMOS
温度等级	INDUSTRIAL
端子形式	NO LEAD
端子节距	0.5 mm
端子位置	QUAD
处于峰值回流温度下的最长时间	30
宽度	3 mm

LTC2963IUDC-1#PBF

LTC2963IUDC-1#PBF概述

LTC2963IUDC-1#PBF规格参数

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