Datasheet B431BM, B431AZ, B431AR, B431AM, B431DBR Datasheet (BAYLI)

h

Bay Linear

Inspire the Linear Power

2.5V Adjustable Shunt Regulator

Description

The Bay Linear B431 is a three terminal adjustable shunt regulator with thermal stability over Temperature range. Using two external resistors allows the output voltage to be adjusted from 2.5V to 36V. With a sharp turn on characteristics the B431 a superior replacement for zener diode applications.

The B431 shunt regulator has a tolerance of 0.5% which has proven to be sufficient to overcome all of the other errors in the system to virtually eliminate the need for trimming in the power supply manufacturers assembly line and contribute a significant cost savings.

Features

• Wide Operating Range …1mA to100mA

• Tight Band Gap Tolerance …….… 0.5%

• Low Temp. Coefficient………..30 ppm/

• Wide temp range of –40 to +105

• Available in TO92, SOT-89, SO-8

Applications

• Switching Power Supplies

• Adjustable Power Supplies

• Linear Regulators

• Battery Powered Equipment

• Monitors, TV, VCR

• Instrumentation

Package Information Ordering Information

Ref

TO-92 (Z)

132

Anode

Bottom View

Cat

Package Tolerance

0.5% 1% 1% 2%

TO-92 SOT-89 8SOIC

The Electrical Grade & Type is specified on shipping Box Only

B431AZ B431BZ B431DBZ B431CZ B431AR B431BR B431DBR B431CR B431AM B431BM B431DBM B431CM

8-Pin Surface Mount (M)

B431

o

C

o

C

1

2

3

4

Top View

8

7

6

5

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

B431

Absolute Max Ratings

Parameter Symbol Maximum Units

Cathode Voltage Vz 37 V Continuous Cathode Current Iz 150 mA Reference Input Current I Power Dissipation at TA - 25°C SOT-89 S0-8 TO-92 Thermal Resistance S0-8 TO-92 SOT-89 Operating Junction Temperature Range TJ -40 to +150 Operating Ambient Temperature T Storage Temperature Range T

Lead Temperature (Soldering) 10 seconds T ESD Rating (Human Body Model) T

10 mA

REF

P

D

O

JA

1000

750 775

175 160 110

mW

°C/W

°C

A

-65 to +150

STG

300

LEAD

2 kV

ESD

-40 to +105

°C °C

°C

Recommended Operating Conditions

Cathode Voltage, Vz V Cathode Current, Iz 0.1 100 mA

Min Max Symbol

36 V

REF

Electrical Characteristics

Unless specified: T

Parameter Symbol Condition Min Typ Max Units

Reference Voltage V

V

Temp Deviation V

REF

Ratio of Change in

V

To Change in V

REF

Reference Input

Current

I

Temperature

REF

Deviation

Off-State Cathode

Current

Dynamic Output

Impedance

Minimum Operating

Current

. Values in bold apply over full operating ambient temperature.

٨ = 25°C

(1)

2.483 2.495 2.507 V 4 17 mV

Ref

-1.0 -2.7

-0.4 -2.0

(2)

(3)

0.1 1

= V

REF

(1)

0.4 1 mA

0.7 4

0.4 1.2

0.20 0.50

Z

V

REF

V

DEV

∆ V

REF

∆VZ

IREF

I

REF(DEV)

I

V

Z (OFF)

rz

I

V

Z(MIN)

= V

Z

= V

Z

IZ = 10mA,∆V

I

= 10mA,∆V

Z

R1 = 10kΩ, R2 = ∞,

REF

F <1kHz, V

I

= 1mA to 100mA

Z

= 10mA

REF1 IZ

= 10mA

REF1 IZ

= 10V to V

Z

= 36V to 10V

Z

I

= 10mA

Z

= 10mA

I

Z

= 0V, VZ =36V

Z

= V

Z

REF

B431 0.5%

mV/V

µA

Ω

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

B431

Parameter Symbol Condition Min Typ Max Units

Reference Voltage V

V

Temp Deviation V

REF

Ratio of Change in

V

To Change in V

REF

Z

Reference Input

Current

I

Temperature

REF

Deviation

Off-State Cathode

Current

Dynamic Output

Impedance

Minimum Operating

Current

V

REF

V

DEV

∆ V

REF

∆VZ

IREF

I

REF(DEV)

I

V

Z (OFF)

rz

I

V

Z(MIN)

= V

Z

= V

Z

IZ = 10mA,∆V

I

= 10mA,∆V

Z

R1 = 10kΩ, R2 = ∞,

REF

F <1kHz, V

I

= 1mA to 100mA

Z

= 10mA

REF1 IZ

= 10mA

REF1 IZ

= 10V to V

Z

= 36V to 10V

Z

I

= 10mA

Z

= 10mA

I

Z

= 0V, VZ =36V

Z

= V

Z

REF

(1)

2.470 2.495 2.520 V 4 17 mV

Ref

-1.0 -2.7

-0.4 -2.0

(2)

(3)

0.1 1

= V

REF

(1)

0.4 1 mA

0.7 4

0.4 1.2

0.20 0.50

B431 1%

mV/V

µA

Ω

Parameter Symbol Condition Min Typ Max Units

Reference Voltage V

V

Temp Deviation V

REF

Ratio of Change in

V

To Change in V

REF

Z

Reference Input

Current

I

Temperature

REF

Deviation

Off-State Cathode

Current

Dynamic Output

Impedance

Minimum Operating

Current

V

REF

V

DEV

∆ V

REF

∆VZ

IREF

I

REF(DEV)

I

V

Z (OFF)

rz

V

I

Z(MIN)

= V

Z

= V

Z

IZ = 10mA,∆V

I

= 10mA,∆V

Z

R1 = 10kΩ, R2 = ∞,

REF

F <1kHz, V

I

= 1mA to 100mA

Z

= 10mA

REF1 IZ

= 10mA

REF1 IZ

= 10V to V

Z

= 36V to 10V

Z

I

= 10mA

Z

= 10mA

I

Z

= 0V, VZ =36V

Z

= V

Z

REF

(1)

2.445 2.495 2.545 V 4 17 mV

Ref

-1.0 -2.7

-0.4 -2.0

(2)

(3)

0.1 1

= V

REF

(1)

0.4 1 mA

0.7 4

0.4 1.2

0.20 0.50

B431 2%

mV/V

µA

Ω

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

B431

Parameter Symbol Condition Min Typ Max Units

Reference Voltage V

V

Temp Deviation V

REF

Ratio of Change in

V

To Change in V

REF

Z

Reference Input

Current

I

Temperature

REF

Deviation

Off-State Cathode

Current

Dynamic Output

Impedance

Minimum Operating

Current

V

REF

V

DEV

∆ V

REF

∆VZ

IREF

I

REF(DEV)

I

V

Z (OFF)

rz

I

V

Z(MIN)

= V

Z

= V

Z

IZ = 10mA,∆V

I

= 10mA,∆V

Z

R1 = 10kΩ, R2 = ∞,

REF

F <1kHz, V

I

= 1mA to 100mA

Z

= 10mA

REF1 IZ

= 10mA

REF1 IZ

= 10V to V

Z

= 36V to 10V

Z

I

= 10mA

Z

= 10mA

I

Z

= 0V, VZ =36V

Z

= V

Z

REF

Note 1: B431D is rated at -40°C to +85°C and 50ppm/°C

(1)

2.470 2.495 2.520 V 4 17 mV

Ref

-1.0 -2.7

-0.4 -2.0

(2)

(3)

0.1 1

= V

REF

(1)

0.4 1 mA

0.7 4

0.4 1.2

0.20 0.50

B431D 1%

mV/V

µA

Ω

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

Calculating Average Temperature Coefficient (TC)

5000

ppm

0.5

Test Circuit

V

IN

I

REF

Figure

mV

%

000

-10

-20

-55

-25 0 25 50 75 100 125

0.06 mV/°C

0.002 %/°C

24 ppm/°C

I

1a. Test Circuit 1

∆

V

REF

Temperature (°C)

V

= V

KA

REF

K

∆Τ

V

IN

R

1

(V

)

REF

R

2

Figure

1b. Test Circuit 2

TC in mV/°C =

TC in %/°C =

TC in ppm/°C =

V

KA

I

K

∆

V

REF

∆

)

∆

V

at 25°C

V

REF

∆

)

∆

V

REF

V

IN

Figure

1c. Test Circuit 3

(mV)

T

A

REF

T

A

V

REF

at 25°C

∆

T

A

B431

x 100

)

I

K (OFF)

x 10

V

KA

6

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

TYPICAL PERFORMANCE CURVES

B431

A)

µ

- Cathode Current (

K

I

-100

-200

100

900

800

700

600

500

400

300

200

100

0

VKA = 18V V

REF

10

1

Low Current Operating Characteristics

VKA = V

Temperature Range: - 0 to 105 °C

REF

105 °C

25 °C

-0°C

1.0-1.0 2.00

VKA - Cathode Voltage (V)

Figure 2

Off State Leakage

= 0V

High Current Operating Characteristics

150

VKA = V

125

100

) A m

( t n e r r u C e d o h

t a

C

-

K

I

-100

3.0

Temperature Range: - 0 to 105 °C

75

50

25

0

-25

-50

-75

-2-10123

REF

VKA - Cathode Voltage (V)

Figure 3

2.53

2.52

) V

(

2.51

e g a

t

l o

V

2.50

e c n e r e

f e

2.49

R

-

F E R

V

2.48

Reference Voltage vs. Ambient Temperature

VKA = V

REF

IK = 10 mA

= 2.500 V at 25 °C

V

REF

off - Off State Cathode Current (nA)

0.1

Z

I

0.01

-60 -30 0 30 60 90 120

TA - Ambient Temperature ( °C)

Figure 4

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

2.47

2.46

2.45

-60 -30 0 30 60

TA - Ambient Temperature ( °C)

Figure 5

90 120

TYPICAL PERFORMANCE CURVES

B431

3.0

)

2.5

A (

µ

t n e r r

2.0

u C

t u p n

1.5

I e

c n e r e

f

1.0

e R

-

F E R

I

0.5

0

-60 -30 0 30 60 90 120

Reference Input Current

R1 = 10 k R2 = IK = 10 mA

TA - Ambient Temperature ( °C)

Figure 6

Noise Voltage

Hz

√

70

60

50

40

30

Noise Voltage nV/

20

10

VKA = V

REF

IK = 10 mA T

= 25°C

A

0

10 100 1 k 10 k 100 k

f - Frequency (Hz)

Figure 8

0

Ω

∞

-10

-20

-30

- Change in Reference Voltage (mV)

-40

REF

V

-50

Reference Voltage Line Regulation

0 °C

25 °C

75 °C

- Cathode Voltage (V)

V

KA

105 °C

180 3 6 9 12 15

Figure 7

0.150

0.125

)

Ω

0.100

( e

c n a d e p

0.075

m I

c

i m

a n

0.050

y D

-

A K

Z

0.025

0.0

-60 -30 0 30 60 90 120

Low Frequency Dynamic Output Impedance

= V

V

KA

REF

IKA = 1 to 100 mA

1 kHz

f <

TA - Free Air Temperature

Figure 9

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

TYPICAL PERFORMANCE CURVES

B431

100

10

1.0

- Dynamic Impedance

KA

Z

0.1

0.01

1 k 10 k 100 k 1 M

Small Signal Voltage Gain vs. Frequency

70

Temperature Range: -0 to 105 °C

60

50

40

30

TA = 25 °C

= 1 to 100 mA

I

K

I

= 10 mA

K

Dynamic Output Impedance

f - Frequency (Hz)

Figure 10

9 µF

15 k

10 M

OUT

Ω

I

K

230

20

- Small Signal Voltage Gain (dB)

V

A

10

0

1 k 10 k 100 k 1 M 10 M

Bay Linear, Inc

8.25 k

GND

f - Frequency (Hz)

Figure 11

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

TYPICAL PERFORMANCE CURVES

B431

6

5

4

3

2

1

Input and Output Voltages (V)

0

-1

100

A: V B: VKA = 5V at IK = 10 mA

90

C: V D: V

80

70

60

= V

KA

REF

= 10V at IK = 10 mA

KA

= 15V at IK = 10 mA

KA

Pulse Response

INPUT

OUTPUT

µ

t - Time (

s)

Stability Boundary Conditions

INPUT MONITOR

fP = 100 kHz

12

11109876543210

220

Ω

50

Ω

OUT

GND

Figure 12

C

150

Ω

50

40

- Cathode Current (mA)

K

I

30

20

10

0

10

Bay Linear, Inc

I

K

STABILITY

REGION

T

A

10

= 25 °C

1

A

B

3

2

10

- Load Capacitance (pF)

C

L

10

D

7

6

5

4

10

Figure 13

10 k

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

C

L

TO-92

0.090 (2.286) Radius typ.

1

10° typ.

0.185 (4.699)

0.175 (4.445)

Seating Plane

0.016 (0.406)

0.014 (0.356)

0.055 (1.397)

0.045 (1.143)

2

BOTTOM VIEW

0.185 (4.699)

0.045 (1.143)

3

0.055 (1.397)

0.045 (1.143)

0.085 (2.159) Diameter

0.090 (2.286) typ.

0.025 (0.635) Max Uncontrolled Lead Diameter

0.500 (12.70) Min.

0.145 (3.683)

0.135 (3.429)

0.0155 (0.3937)

0.0145 (0.3683)

B431

5° typ.

Bay Linear, Inc

0.105 (2.667)

0.095 (2.413)

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

B431

SOT-89

Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations, computer simulations and/ or initial prototype evaluation.

P

K

F

STYLE 1

rr

PIN 1. BASE

2. COLLECTOR

3. EMITTER

STYLE 2

PIN 1. ANODE

2. CATHODE

3. NO CONNECTION

1

A

N

2

G

3

STYLE 3

PIN 1. GATE

2. ANODE

3. CATHODE

STYLE 4

PIN 1. DRAIN

2. GATE

3. SOURCE

B

D

C

J

-T-

MILLIMETERS INCHES

DIM

MIN MAX MIN MAX A 4.40 4.60 0.174 0.181 B 2.29 2.60 0.091 0.102

C 140 160 0.056 0.062 D 0.36 0.48 0.015 0.018

E 1.62 1.80 0.064 0.070 F 0.44 0.53 0.018 0.020

G

150 BSC 0.059 BSC J 0.35 0.44 0.014 0.017 K 0.80 1.04 0.032 0.040 L 300 BSC 0.118 BSC

N 2.04 2.28 0.081 0.089

P 3.94 4.25 0.156 0.167

Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.

The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit design or permit any industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any industrial property right resulting from the use of the contents shown in the data book. Typical parameters can and do vary in different applications. Customer’s technical experts must validate all operating parameters including “ Typical” for each customer application.

LIFE SUPPORT AND NUCLEAR POLICY

Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical implants into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific written consent of Bay Linear President.

Bay Linear, Inc

2418 Armstrong Street, Livermore, CA 94506 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com