Datasheet B3431CK3, B3431BK3, B3431AK3 Datasheet (BAYLI)

p

Bay Linear

Bay LinearBay Linear

Inspire the Linear Power

ire the Linear Power

Ins

ire the Linear PowerInspire the Linear Power

Adjustable Shunt Regulator

B3431

Description

The Bay Linear B3431 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 B3431 a superior replacement for zener diode applications.

.

The B3431 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 Tolera nce ….….…0.5%

• Low Temp. Coefficient…...…...30 ppm/

• Wide temp range of –40 to +105

• Available in SOT-23 package

Applications

• Switching Power Supplies

• Adjustable Power Supplies

• Linear Regulators

• Battery Powered Equipment

• Monitors, TV, VCR

• Instrumentation

o

C

Package Information Ordering & Marking Information

SOT-23-3 (K3) B343 1

SOT-23-3 (K3) LM343 1

ANODE

3

1

2

SOT-23-3 (K3) B343 1

ANODE

3

1

Package Tolerance

0.5% 1% 2% SOT-23 B3431AK3 B3431BK3 B3431CK3

2

CATHODE

REF

CATHODE

REF

CATHODE

REFCATHODE

Top View

REF

Top View

CATHODE (K)

o

C

REFERENCE

(R)

Bay Linear, Inc

2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

2.5V

+

-

ANODE (A)

B3431

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 S0-8 TO-92 SOT-23-3 Thermal Resistance SOT-23-3 S0-8 TO-92 Operating Junction Temperature Range TJ -40 to +150 Storage Temperature Range T Lead Temperature (Soldering) 10 seconds T ESD Rating (Human Body Model) T

10 mA

REF

P

D

OJA

-65 to +150

STG

300

LEAD

2 kV

ESD

750 775 200

575 175 160

mW

C/W

°

C

°

C

°

C

°

Recommended Operating Conditions

Min Max Symbol

Cathode Voltage, Vz V

36 V

REF

Cathode Current, Iz 0.1 150 mA

Electrical Characteristics

.

Unless specified: T

٨ = 25°C

Values in bold apply over full operating ambient temperature

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

Z

V

REF

V

DEV

Δ V

REF

ΔVZ

IREF

I

REF(DEV)

I

V

Z (OFF)

rz

I

V

Z(MIN)

= V

Z

= V

Z

IZ = 10mA,ΔV

= 10mA,ΔV

I

Z

R1 = 10kΩ, R2 = ∞,

REF

F <1kHz, V

= 1mA to 100mA

I

Z

= 10mA

REF1 IZ

= 10mA

REF1 IZ

= 10V to V

Z

= 36V to 10V

Z

= 10mA

I

Z

= 10mA

I

Z

= 0V, VZ =36V

Z

= V

Z

REF

(1)

(2)

(3)

= V

REF

(1)

0.4 1

2.490 2.50 2.515 V

Ref

-2.7 -1.0

-2.0 -0.4 0.3

0.7

0.20 0.50

.

B3431 0.5%

4 17 mV

mV/V

4

0.4 1.2

0.1 1

µµµµA µµµµA µµµµA

Ω

mA

Bay Linear, Inc

2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

B3431

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

Δ V

REF

ΔVZ

IREF

I

REF(DEV)

I

V

Z (OFF)

rz

I

V

Z(MIN)

= V

Z

= V

Z

IZ = 10mA,ΔV

= 10mA,ΔV

I

Z

R1 = 10kΩ, R2 = ∞,

REF

F <1kHz, V

= 1mA to 100mA

I

Z

= 10mA

REF1 IZ

= 10mA

REF1 IZ

= 10V to V

Z

= 36V to 10V

Z

= 10mA

I

Z

= 10mA

I

Z

= 0V, VZ =36V

Z

= V

Z

REF

(1)

2.474 2.50 2.526 V

Ref

-2.7 -1.0

-2.0 -0.4 0.3

(2)

(3)

= V

REF

(1)

0.4 1

0.7

0.20 0.50

B3431 1%

4 17 mV

mV/V

4

0.4 1.2

0.1 1

µµµµA µµµµA µµµµA

Ω

mA

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

Δ V

REF

ΔVZ

IREF

I

REF(DEV)

I

V

Z (OFF)

rz

I

V

Z(MIN)

= V

Z

= V

Z

IZ = 10mA,ΔV

= 10mA,ΔV

I

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

= 10mA

I

Z

= 10mA

I

Z

= 0V, VZ =36V

Z

= V

Z

REF

(1)

2.445 2.495 2.545 V

Ref

-2.7 -1.0

-2.0 -0.4 0.3

(2)

(3)

= V

REF

(1)

0.4 1

0.7

0.20 0.50

B3431 2%

4 17 mV

mV/V

4

0.4 1.2

0.1 1

µµµµA µµµµA µµµµA

Ω

mA

Bay Linear, Inc

2478Armstrong St., Livermore CA USA 9550 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

1b. Test Circuit 2

Figure

TC in mV/°C =

TC in ppm/°C =

I

K

TC in %/°C =

V

KA

∆

V

REF

∆

)

∆

V

at 25°C

REF

∆

)

∆

V

REF

V

IN

1c. Test Circuit 3

Figure

(mV)

T

A

REF

T

A

V

REF

at 25°C

∆

T

A

B3431

x 100

)

6

x 10

)

V

KA

I

K (OFF)

Bay Linear, Inc

2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

TYPICAL PERFORMANCE CURVES

B3431

900

800

Temperature Range: - 0 to 105 °C

700

600

A)

µ

µµ

µ

500

400

300

200

- Cathode Current (

K

I

100

0

-100

-200

100

VKA = 18V

= 0V

V

REF

10

Low Current Operating Characteristics

VKA = V

REF

105 °C

25 °C

-0°C

1.0-1.0 2.00

VKA - Cathode Voltage (V)

Figure 2

Off State Leakage

High Current Operating Characteristics

150

VKA = V

125

100

- Cathode Current (mA)

K

I

-100

3.0

Temperature Range: - 0 to 105 °C

75

50

25

0

-25

-50

-75

-2 -1 0 1 2 3

REF

VKA - Cathode Voltage (V)

Figure 3

2.53

2.52

2.51

Reference Voltage vs. Ambient Temperature

VKA = V

REF

IK = 10 mA

1

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

2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

2.50

= 2.500 V at 25 °C

V

2.49

- Reference Voltage (V)

EF R

V

2.48

2.47

2.46

2.45

REF

-60 -30 0 30 60

TA - Ambient Temperature ( °C)

Figure 5

90 120

TYPICAL PERFORMANCE CURVES

B3431

3.0

2.5

A)

µ

µµ

µ

2.0

1.5

1.0

- Reference Input Current (

EF 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

Ω

∞

0

-10

-20

-30

- Change in Reference Voltage (mV)

-40

REF

V

-50

Reference Voltage Line Regulation

0 °C

25 °C

75 °C

V

- Cathode Voltage (V)

KA

105 °C

180 3 6 9 12 15

Figure 7

Low Frequency Dynamic Output Impedance

0.150

0.125

)

Ω

Ω Ω

Ω

0.100

0.075

= V

V

KA

REF

IKA = 1 to 100 mA

1 kHz

f <

30

Noise Voltage nV/

20

10

VKA = V

REF

IK = 10 mA TA = 25°C

0

10 100 1 k 10 k 100 k

Bay Linear, Inc

0.050

- Dynamic Impedance (

A K

Z

0.025

0.0

-60 -30 0 3 0 60 90 120

f - Frequency (Hz)

Figure 8

TA - Free Air Temperature

Figure 9

2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

TYPICAL PERFORMANCE CURVES

B3431

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

Dynamic Output Impedance

TA = 25 °C

= 1 to 100 mA

I

K

f - Frequency (Hz)

= 10 mA

I

K

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

2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

TYPICAL PERFORMANCE CURVES

B3431

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

KA

Stability Boundary Conditions

= V

REF

= 10V at IK = 10 mA

= 15V at IK = 10 mA

Pulse Response

INPUT

OUTPUT

µµµµ

t - Time (

s)

INPUT MONITOR

fP = 100 kHz

12

11109876543210

Ω

220

Ω

50

OUT

GND

Figure 12

C

Ω

150

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

C

- Load Capacitance (pF)

L

D

7

6

5

4

10

Figure 13

10 k

2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com

C

L

B3431

Packaging Information

SOT-23

Advance Information

computer simulations and/ or initial prototype evaluation.

0.020 - 0.024

(0.508 - 0.610)

0.110 - 0.120

(2.794 - 3.048)

0.015 - 0.018

(0.381 - 0.457)

0.047 - 0.055

(1.194 - 1.397)

0.035 - 0.040

(0.889 - 1.016)

0.070 - 0.080

(1.778 - 2.032)

0.001 - 0.004

(0.025 - 0.102)

-

These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations,

0.030 - 0.041

(0.762 - 1.041)

0.083 - 0.098

(2.108 - 2.489)

0.003 - 0.005

(0.076 - 0.127)

0.018 - 0.024

(0.457 - 0.610)

-

Preliminary Information

subject to change upon the completion of the full characterization over the specified temperature and supply voltage ranges.

These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are

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

2478Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com