Datasheet CL1431S, CL1431LP, CL1431D Datasheet (Calogic LLC)

CORPORATION

Precision Adjustable

Shunt Reference

CL1431

FEATURES

•• Temperature-Compensated: 30ppm/

o

C

•• Trimmed 0.4% Bandgap Reference

•• Internal Amplifier w it h 150mA C a pability

•• T empe rature Range: Extended to -55 to 125

o

C

•• Low Frequenc y Dynami c Output Imp edan ce: < 150m

•• Low Output Noise

•• Robust ESD Pr ot ection

PIN CONFIGU R ATI O N (Top View)

DESCRIPTION

The CL1431 is an adjustable shunt regulator designed t o ac t
as an open-loop error amplifier with a 2.5V temperature
compensated reference. Its highly accurate 0.4% bandgap
reference is perfect for applications requiring stability and
accuracy over temp er atur e and life.

Sharp turn-on characteristics and a low temperature
coefficient make the CL1431 an excellent replacement for
many zener diode applications, programmable to any value
greater than 2.5V and up to 36V by using two external
resistors. As a combination error amplifier and reference, it
can be used to manage contr ol loops suc h a s s w itchin g p ower
supplies.

The CL1431 can be used as a direct replacement for the
standard TL431.

ORDERING INFORMATION
Part Package Temperature Range

o

CL1431LP TO-92 -55 to 125
CL1431D 8-Pin Plastic SOI C -55 to 12 5
CL1431S SOT-89 -55 to 125

C

o

C

o

C

TO-92 (LP)

CATHODE

ANODE

REFERENCE

1G-33

CATHODE

ANODE

ANODE

N/C

SOIC (D)

1

2

3

4

8

REFERENCE

7

ANODE

6

ANODE

5

N/C

1G-34

SOT-89 (S)

CATHODE

ANODE

REFERENCE

1G-35

CALOG IC CORPOR AT ION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

CL1431

CORPORATION

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNITS

V

KA

I

AK

I

KA

I

REF

P

D

T

J

T

STG

T

L

Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permane nt damag e to the device. This is a stress r ating
only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification
is not implied. Exposure to ab solut e ma ximu m rati ng conditi on s for ext ende d peri od s may affe ct reliab ili ty.

RECOMMENDED CONDITIONS

SYMBOL P ARAMETER RATING UNIT

V

KA

I

K

Cathode-Anode Reverse Breakdown 37 V
Anode-Cathode Forward Current 1 A
Operating Cathode Current 250 mA
Reference Inp ut Current 10 mA
Continuous Power Dissipation at 25oC

TO-92
8L SOIC
SOT-89

775
750

1000
Junction Temperature 150
Storage Temperature –65 to 150
Lead Temperature, Soldering 10 Seconds 300

TYPICAL THERMAL RESISTANCES

Cathode Voltage V

to 36 V

REF

Cathode Current 10 mA

PACKAGE θ

TO-92 160
SOIC 175
SOT-89 110

JA

o

C/W 80oC/W 6.3mW/oC

o

C/W 45oC/W 5.7mW/oC

o

C/W 8oC/W 9.1mW/oC

θ

JC

mW
mW
mW

o

C

o

C

o

C

TYPICAL DERATING

FUNCTIONAL BLOCK DIAGRAM

CATHODE (K)

REFERENCE (R)

+
–

2.5V

ANODE (A)

1G-36

CALOG IC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, T elephone: 510-656-2900, FAX: [phone]

CL1431

CORPORATION

ELECTRICAL CHARACTERISTICS

Electrica l characte ri stics are gua ran te ed over full junction temp erature rang e (-55 to 125oC). Ambient tempera ture must be derated based on
power dissipation and package thermal characteristics. The conditions are: V

SYMBOL PARAMETER MIN TYP M AX UNIT CIRCUIT TEST CONDITION

V

REF

TC V
V

REF

I

REF

I

REF

I

K(MIN)

I

K(OFF)

Z

KA

Reference Voltage

with Temp.* 0.06 0.16 mV/oC1

REF

Ratio of Change in V

REF

to

Cathode Voltage
Reference Input Current 0.7 1.9 µA2R
I

Temp Deviation 0.4 1.2 µA 2 Over Temp.

REF

Min IK for Regulation 0.4 1 mA 1
Off State Leakage 0.04 250 nA 3 V
Dynamic Output Impedance 0.15 0.2 Ω 1f ≤ 1kHz, IK = 1 to 100mA

2.490 2.500 2.510 V 1 T

2.470 2.530 V 1 Over Temp.

-2 -1.1 mV/V 2 V

KA

= V

and IK = 10mA unless otherwise stated.

REF

= 25oC

A

= 3V to 36V

K

= 10k; R2 =

1

= 0V, VKA = 36V

REF

*CALCULAT ING AVERAGE TEMPERATURE COEFFICIENT (TC)

%

–10

–20

mV

∆V

REF

∆T

–55

–25 0 25 50 75 100 125

TEMPERATURE (˚C)

0.06 mV/˚C

0.002 %/˚C
24 ppm/˚C

1J-24

ppm

000

0.55000

TEST CIRCUITS

V

V

IN

I

REF

V

= V

KA

REF

I

K

IN

R

(V )

REF

R

1

I

REF

2

∆V

(mV)

• TC in mV/oC =

• TC in %/oC =

• TC in ppm/oC =

V

KA

I

K

V

IN

REF

∆T

A

∆V

REF




V

at 25



REF




V



REF

∆T

∆V

REF

at 25oC

∆T

V

I

K(OFF)

o

C

A

KA



x 100






x 10




A

6

1G-38

1G-39

1G-40

TEST CIRCUIT 1 TEST CIRCUIT 2 TEST CIRCUIT 3

CALOG IC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, T elephone: 510-656-2900, FAX: [phone]

CL1431

TYPICAL PERFORMANCE CU R VES

CORPORATION

LOW CURRENT OPERATING

900
800
700
600
500
400
300
200
100

– CATHODE CURRENT (µA)

0

K

I

–100
–200

–1.0 3.0

100

10

1

CURRENT (nA)

– OFF STATE CATHODEI

0.1

off

Z

0.01
–60

CHARACTERISTICS

V= V

REFKA

TEMPERATURE RANGE: –55 to 125˚C

125˚C

25˚C

–55˚C

1.00 2.0

VKA– CATHODE VOLTAGE (V)

OFF STATE LEAKAGE

VKA= 36V

= 0V

V

REF

–30 0 306090120

– AMBIENT TEMPERATURE (˚C)T

A

1G-41

1G-43

HIGH CURRENT OPERATING

CHARACTERISTICS

VKA= V

REF

TEMPERATURE RANGE: –55 to 125˚C

–2 3

– CATHODE VOLTAGE (V)V

KA

– CATHODE CURRENT (mA)

I

K

150
125
100

75
50
25

0
–25
–50
–75

–100

REFERENCE VOLTAGE vs

AMBIENT TEMPERATURE

2.53
VKA= V

2.52

2.51

2.50

2.49

2.48

2.47

– REFERENCE VOLTAGE (V)

2.46

REF

V

2.45

–60

REF

IK= 10mA

V

REF

–30
– AMBIENT TEMPERATURE (˚C)T

A

= 2.500V AT 25˚C

0 306090120

210–1

1G-42

1J-25

REFERENCE VOLTAGE

0

LINE REGULATION

–55˚C

0˚C

25˚C

75˚C

125˚C

IK= 10mA

TEMPERATURE RANGE: –55 to 125˚C

3 6 9 12 15 18 21 24 27

030

KA

– CATHODE VOLTAGE (V)V

1G-46

– REFERENCE INPUTI

REF

REFERENCE

3.0

2.5

2.0

1.5

1.0

CURRENT (µA)

0.5

0

–60

INPUT CURRENT

R1 = 10kΩ
R2 = ∞

= 10mA

I

K

–30 0 306090120

TA– AMBIENT TEMPERATURE (˚C)

1G-45

–10

–20

–30

VOLTAGE (mV)

– CHANGE IN REFERENCEV

–40

REF

–50

CALOG IC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, T elephone: 510-656-2900, FAX: [phone]

CORPORATION

TYPICAL PERFORMANCE CU R VES (cont in ued)

NOISE VOLTAGE

VKA= V

REF

I

= 10mA

K

= 25˚C

T

A

f – FREQUENCY (Hz)

10k1k100

NOISE VOLTAGE nV/ Hz

70

60

50

40

30

20

10

0

10

100k

1G-47

– DYNAMIC IMPEDANCE (Ω)

KA

Z

LOW FREQUENCY DYNAMIC

0.150

0.125

0.100

0.075

0.050

0.025

0.0

OUTPUT IMPEDANCE

VKA= V

REF

= 1 TO 100mA

I

KA

f ≤ 1kHz

–30 0 306090120

–60

– FREE AIR TEMPERATURET

A

CL1431

1G-48

70

60

50

40

100

1.0

0.1

– DYNAMIC IMPEDANCE (Ω)

KA

Z

0.01

SMALL SIGNAL GAIN

vs FREQUENCY

TEMPERATURE RANGE: –55 to 125˚C

IK= 10mA

10

1k

DYNAMIC OUTPUT

IMPEDANCE

TA= 25˚C

= 1 TO 100mAI

K

f – FREQUENCY (Hz)

9µF

10M

15k

1G-49

OUT

I

K

230Ω

1M100k10k

GAIN (dB)

– SMALL SIGNAL VOLTAGEA

V

30

20

10

0

1k

1M100k10k

f – FREQUENCY (Hz)

10M

1J-26

8.25k
GND

1H-01

CALOG IC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, T elephone: 510-656-2900, FAX: [phone]

CL1431

1H-03

GND

OUT

220

Ω

INPUT

MONITOR

50

Ω

fP= 100kHz

TYPICAL PERFORMANCE CU R VES (cont in ued)

CORPORATION

6

PULSE RESPONSE

INPUT

5

4

3

OUTPUT

2

1

0

INPUT AND OUTPUT VOLTAGES (V)

–1

0

t – TIME (µs)

STABILITY BOUNDARY

100

A: VKA= V

B: VKA= 5V AT IK= 10mA

90

C: V

80

D: V

70
60
50
40
30
20

– CATHODE CURRENT (mA)

K

I

10

TA= 25˚C

0

10 10

CONDITIONS

REF

= 10V AT IK= 10mA

KA

= 15V AT IK= 10mA

KA

STABILITY

REGION

– LOAD CAPACITANCE (pF)C

L

A
B

D

121234567891011

1H-02

150Ω

I

K

C

C

L

10k

1H-05

7

6543210

101010101010

1H-04

Inform at ion furni shed by Calogic is believed to be accurate and reliable. Howe ver, no responsibility is assum ed for its use: nor for any in fring eme nt of pate nts or other
rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic.

CALO GIC CORP OR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]