LINEAR TECHNOLOGY LTC2915, LTC2916 Technical data

LTC2915/LTC2916

Voltage Supervisor with

27 Selectable Thresholds

FEATURES

n

9 Selectable Supply Voltages

12V, 5V, 3.3V, 2.5V, 1.8V

1.5V, 1.2V, 1.0V, +ADJ (0.5V)

n

3 Selectable Tolerances

–5%, –10%, –15% (LTC2915)

n

Manual Reset Input (LTC2916)

n

1.5V to 5.5V Supply Operation

n

6.2V Shunt Regulator for High Voltage Operation

n

Guaranteed Operation to 125˚C

n

Guaranteed Threshold Accuracy: ±1.5%

n

Low Quiescent Current: 30μA Typical

n

Power Supply Glitch Immunity

n

Guaranteed RST for VCC ≥ 0.8V

n

Low Profi le (1mm) 8-Lead TSOT-23 (ThinSOTTM) and

(3mm × 2mm) DFN Packages

APPLICATIONS

n

Handheld Devices

n

Cell Phone Base Stations

n

Automotive Control Systems

n

Network Servers

n

Optical Networking Systems

DESCRIPTION

The LTC®2915/LTC2916 are low voltage single-supply
monitors with selectable thresholds. The parts operate
from 1.5V to 5.5V and consume a quiescent current of
only 30μA.

Two three-state inputs select one of nine internally pro­grammed thresholds without the need for external resistors.
For the LTC2915, an additional three-state input determines
the tolerance (–5%, –10%, –15%). The tolerance for the
LTC2916 is fi xed at –5%. Threshold accuracy is guaranteed
at ±1.5% over the entire operating temperature range.
Glitch fi ltering ensures reliable reset operation without
false triggering.

The reset timeout may be set to 200ms or adjusted using
an external capacitor. A separate manual reset input on the
LTC2916 allows a simple push button interface.

Operation to 125°C makes the LTC2915 and LTC2916
suitable for automotive applications.

L, LT, LTC and LTM 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

1.8V, –5% Tolerance Supply Monitor

1.8V

0.1μF

V

CC

LTC2916

VM

RT SEL1

MR

RST RESET

= 200ms

t

SEL2

GND

RST

10k

Monitor Selection Table

NOMINAL VOLTAGE SEL1 SEL2

12V V

V

CC

μP

29156 TA01

5V V

3.3V V

2.5V Open V

1.8V Open Open

1.5V Open GND

1.2V GND V

1V GND Open

ADJ (0.5V) GND GND

CC

CC

CC

V

CC

Open

GND

CC

CC

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1

LTC2915/LTC2916

ABSOLUTE MAXIMUM RATINGS

(Notes 1, 2)

Terminal Voltages

(Note 3) .......................................... –0.3V to 5.7V

V

CC

SEL1, SEL2, TOL, MR, RST .................. –0.3V to 7.5V

VM ......................................................... –0.3V to 15V

RT .............................................–0.3V to (V

+ 0.3)V

CC

Terminal Currents

(Note 3) .......................................................±5mA

V

CC

PIN CONFIGURATION

TOP VIEW

VM 1

SEL1 2

TOL/MR 3

GND 4

TS8 PACKAGE

8-LEAD PLASTIC TSOT-23

TOL FOR LTC2915

MR FOR LTC2916

= 150°C, θJA = 250°C/W

T

JMAX

8 V

CC

7 SEL2
6 RT
5 RST

Operating Temperature Range

LTC2915C/LTC2916C ............................... 0°C to 70°C

LTC2915I/LTC2916I .............................. –40°C to 85°C

LTC2915H/LTC2916H ......................... –40°C to 125°C

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

TS8 Lead Temperature (Soldering, 10 sec) ........... 300°C

TOP VIEW

1GND

TOL/MR

2

SEL1

3

VM

4

8-LEAD (3mm s 2mm) PLASTIC DFN

EXPOSED PAD (PIN 9) PCB GND CONNECTION OPTIONAL

DDB PACKAGE

TOL FOR LTC2915

MR FOR LTC2916
= 150°C, θJA = 76°C/W

T

JMAX

8

RST

RT

7

9

SEL2

6

V

5

CC

ORDER INFORMATION

LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LTC2915CTS8-1#PBF
LTC2915ITS8-1#PBF
LTC2915HTS8-1#PBF
LTC2915CDDB-1#PBF
LTC2915IDDB-1#PBF
LTC2915HDDB-1#PBF

LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LTC2916CTS8-1#PBF
LTC2916ITS8-1#PBF
LTC2916HTS8-1#PBF
LTC2916CDDB-1#PBF
LTC2916IDDB-1#PBF
LTC2916HDDB-1#PBF

Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.

For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:

LTC2915CTS8-1#TRPBF
LTC2915ITS8-1#TRPBF
LTC2915HTS8-1#TRPBF
LTC2915CDDB-1#TRPBF
LTC2915IDDB-1#TRPBF
LTC2915HDDB-1#TRPBF

LTC2916CTS8-1#TRPBF
LTC2916ITS8-1#TRPBF
LTC2916HTS8-1#TRPBF
LTC2916CDDB-1#TRPBF
LTC2916IDDB-1#TRPBF
LTC2916HDDB-1#TRPBF

LT C V Q
LT C V Q
LT C V Q
LCVR
LCVR
LCVR

LT D C W
LT D C W
LT D C W
LDCX
LDCX
LDCX

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

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

8-Lead TSOT-23
8-Lead TSOT-23
8-Lead TSOT-23
8-Lead (3mm × 2mm) Plastic DFN
8-Lead (3mm × 2mm) Plastic DFN
8-Lead (3mm × 2mm) Plastic DFN

8-Lead TSOT-23
8-Lead TSOT-23
8-Lead TSOT-23
8-Lead (3mm × 2mm) Plastic DFN
8-Lead (3mm × 2mm) Plastic DFN
8-Lead (3mm × 2mm) Plastic DFN

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
0°C to 70°C
–40°C to 85°C
–40°C to 125°C

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LTC2915/LTC2916

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

CC(MIN)

V

CC(UVLO)

V

CC(SHUNT)

I

CC

Monitor Input (VM)

V

MT120

V

MT50

V

MT33

V

MT25

V

MT18

V

MT15

V

MT12

V

MT10

V

MTADJ

R

VM

I

VM(ADJ)

Three-State Inputs (SEL1, SEL2), (TOL, LTC2915)

V

TPIN,LOW

V

TPIN,HIGH

V

TPIN,Z

I

TPIN,Z

I

TPIN,H/L

Supply Voltage for Guaranteed RST Low RST Driven Low

Supply Undervoltage Lockout

Shunt Regulation Voltage I

VCC Pin Current SEL1, SEL2, TOL, MR = Open

12V, 5% Reset Threshold
12V, 10% Reset Threshold
12V, 15% Reset Threshold

5V, 5% Reset Threshold
5V, 10% Reset Threshold
5V, 15% Reset Threshold

3.3V, 5% Reset Threshold

3.3V, 10% Reset Threshold

3.3V, 15% Reset Threshold

2.5V, 5% Reset Threshold

2.5V, 10% Reset Threshold

2.5V, 15% Reset Threshold

1.8V, 5% Reset Threshold

1.8V, 10% Reset Threshold

1.8V, 15% Reset Threshold

1.5V, 5% Reset Threshold

1.5V, 10% Reset Threshold

1.5V, 15% Reset Threshold

1.2V, 5% Reset Threshold

1.2V, 10% Reset Threshold

1.2V, 15% Reset Threshold

1V, 5% Reset Threshold
1V, 10% Reset Threshold
1V, 15% Reset Threshold

ADJ (0.5V), 5% Reset Threshold
ADJ (0.5V), 10% Reset Threshold
ADJ (0.5V), 15% Reset Threshold

VM Input Impedance (Note 4) Fixed Threshold Modes

ADJ Input Current VM = 0.5V

Low Level Input Voltage

High Level Input Voltage

Pin Voltage when Open I

Allowable Leakage in Open State

Pin Input Current V

= 25°C. VCC = 2.5V, unless otherwise noted. (Note 2)

A

l

0.8 V

l

= 0.5mA

VCC

SEL1, SEL2, TOL = GND (LTC2915)
MR = V

TPIN

(LTC2916)

CC

= 0μA 0.9 V

= 0V, V

TPIN

CC

l

5.7 6.2 7.0 V

l
l

l

11.04

l

10.44

l

9.84

l

4.600

l

4.350

l

4.100

l

3.036

l

2.871

l

2.706

l

2.300

l

2.175

l

2.050

l

1.656

l

1.566

l

1.476

l

1.380

l

1.305

l

1.230

l

1.104

l

1.044

l

0.984

l

0.920

l

0.870

l

0.820

l

460.0

l

435.0

l

410.0

l

0.5 8

l

l

l

1.4 V

l

l

30
45

11.22

10.62

10.02

4.675

4.425

4.175

3.086

2.921

2.756

2.338

2.213

2.088

1.683

1.593

1.503

1.403

1.328

1.253

1.122

1.062

1.002

0.935

0.885

0.835

467.5

442.5

417.5

1.5 V

50
80

11.40

10.80

10.20

4.750

4.500

4.250

3.135

2.970

2.805

2.375

2.250

2.125

1.710

1.620

1.530

1.425

1.350

1.275

1.140

1.080

1.020

0.950

0.900

0.850

475.0

450.0

425.0

±15 nA

0.5 V

±5 μA

±20 μA

μA
μA

mV
mV
mV

MΩ

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

V
V
V

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LTC2915/LTC2916

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Reset Timer Control (RT)

I

RT(UP)

I

RT(DOWN)

I

RT(INT)

V

RT(INT,LH)

Reset Output (RST)

t

RST(INT)

t

RST(EXT)

t

UV

V

OL

I

OH(RST)

Manual Reset Input (LTC2916)

V

IL

V

IH

R

PU

t

PW

RT Pull-Up Current VRT = 0.25V

RT Pull-Down Current VRT = 1.1V

Internal RT VCC Detect Current VRT = V

RT Internal Timer Threshold VRT Rising, Referenced to V

Internal Reset Timeout Period VRT = V

Adjustable Reset Timeout Period CRT = 2.2nF
VM Undervoltage Detect to RST

Asserted
Output Voltage Low RST VCC = 3.3V, I

RST Output Voltage High Leakage RST = V

Input Low Voltage

Input High Voltage

Pull Up Resistance

Pulsewidth

= 25°C. VCC = 2.5V, unless otherwise noted. (Note 2)

A

l

–2 –3 –4 μA

l

234 μA

CC

CC

CC

VM Less Than Reset Threshold
V

by More Than 5%

MTX

= 2.5mA
= 1V, I
= 0.8V, I

CC

RST

= 100μA

RST

RST

= 15μA

V

CC

V

CC

l

l

–100 –160 –300 mV

l

150 200 260 ms

l

16 20 25 ms

l

10 80 150 μs

l
l
l

l

l

l

0.8 • V

l

50 100 150

l

250 ns

18 μA

0.15

0.15

0.05

0.4

0.3

0.2

±1 μA

0.2 • V

CC

CC

kΩ

V
V
V

V

V

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.

TIMING DIAGRAM

Monitor Input Timing

V

VM

MTx

t

UV

RST

1V

Note 3: VCC maximum pin voltage is limited by input current. Since the
V

pin has an internal 6.2V shunt regulator, a low impedance supply

CC

which exceeds 5.7V may exceed the rated terminal current. Operation
from higher voltage supplies requires a series dropping resistor. See
Applications Information.

Note 4: Input impedance is dependent on the confi guration of the SEL
pins.

t

RST

29156 TD01

4

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