Datasheet AS431CR5ST, AS431CR5SB, AS431CR5SA, AS431CR5S7, AS431CR5S13 Datasheet (ASTEC)

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Datasheet AS431CR5ST, AS431CR5SB, AS431CR5SA, AS431CR5S7, AS431CR5S13, AS431CR5LPT, AS431CR5LPB, AS431CR5LPA, AS431CR5D7, AS431CR5D13, AS431CR25ST, AS431CR25SB, AS431CR25SA, AS431CR25S7, AS431CR25S13, AS431CR25LPV, AS431CR25LPT, AS431CR25LPB, AS431CR5LP7, AS431CR5LP13, AS431CR5DT, AS431CR5DBVT, AS431CR5DBVB, AS431CR5DBVA, AS431CR5DBV7, AS431CR5DBV13, AS431CR5DB, AS431CR5DA, AS431CR25DA, AS431CR25D7, AS431CR25D13, AS431C2SB, AS431C2SA, AS431C2S7, AS431C2LPT, AS431C2LPB, AS431CR25LPA, AS431CR25LP7, AS431CR25LP13, AS431CR25DBVT, AS431CR25DBVB, AS431CR25DBV7, AS431CR25DBV13, AS431CR25DB, AS431C2LPA, AS431C2LP7, AS431C2LP13, AS431C2DT, AS431C2DBVT, AS431C2DBVB, AS431C2DBVA, AS431C2DBV7, AS431C2DBV13, AS431C2DB, AS431C2DA, AS431C2D7, AS431C2D24, AS431C1ST, AS431C1SB, AS431C1SA, AS431C1S7, AS431C1S13, AS431C1LPT, AS431BR25LPA, AS431BR25LP7, AS431BR25DT, AS431BR25DBVT, AS431BR25DBVB, AS431BR25DBVA, AS431BR25DBV7, AS431BR25DBV13, AS431BR5DB, AS431BR5DA, AS431BR5D7, AS431BR25ST, AS431BR25SB, AS431BR25SA, AS431BR25S7, AS431BR25S13, AS431C1LPB, AS431C1LPA, AS431C1LP7, AS431C1LP13, AS431C1DT, AS431C1DBVT, AS431C1DBVB, AS431C1DBVA, AS431C1DBV7, AS431C1DBV13, AS431C1DB, AS431C1DA, AS431C1D13, AS431BR5ST, AS431BR5SB, AS431BR5SA, AS431BR5S7, AS431BR5S13, AS431BR5LPT, AS431BR25DB, AS431BR25DA, AS431BR25D7, AS431BR25D13, AS431B2ST, AS431B2SB, AS431B2SA, AS431B2S7, AS431B2LPT, AS431BR5LPB, AS431BR5LPA, AS431BR5LP7, AS431BR5LP13, AS431BR5DT, AS431BR5DBVT, AS431BR5DBVB, AS431BR5DBVA, AS431BR5DBV7, AS431BR5DBV13, AS431B2DB, AS431B2DA, AS431B2D7, AS431B2D13, AS431B1ST, AS431B1SB, AS431B1SA, AS431B1S7, AS431B1S13, AS431B1LPT, AS431B1LPB, AS431B1LPA, AS431B1LP7, AS431B1LP13, AS431B1DT, AS431B1DBVT, AS431B1DBVB, AS431B1DBVA, AS431B1DBV7, AS431B1DBV13, AS431AR5DBV13, AS431AR5DB, AS431AR5DA, AS431AR5D7, AS431AR5D13, AS431AR25ST, AS431AR25SB, AS431AR25SA, AS431AR25S7, AS431AR25S13, AS431AR25DBV13, AS431AR25DB, AS431AR25DA, AS431AR25D7, AS431AR25D13, AS431A2ST, AS431A2SB, AS431A2SA, AS431A2S7, AS431A2S13, AS431A2DBV13, AS431A2DB, AS431A2DA, AS431A2D7, AS431A2D13, AS431A1ST, AS431A1SB, AS431A1SA, AS431A1S7, AS431A1S13, AS431AR25LPT, AS431AR25LPB, AS431AR25LPA, AS431AR25LP7, AS431AR25LP13, AS431AR25DT, AS431AR25DBVT, AS431AR25DBVB, AS431AR25DBVA, AS431AR25DBV7, AS431B2LPB, AS431B2LPA, AS431B2LP7, AS431B2LP13, AS431B2DT, AS431B2DBVT, AS431B2DBVB, AS431B2DBVA, AS431B2DBV7, AS431B2DBV13, AS431AR5LPT, AS431AR5LPB, AS431AR5LPA, AS431AR5LP7, AS431AR5LP13, AS431AR5DT, AS431AR5DBVT, AS431AR5DBVB, AS431AR5DBVA, AS431AR5DBV7, AS431B1DB, AS431B1DA, AS431B1D7, AS431B1D13, AS431AR5ST, AS431AR5SB, AS431AR5SA, AS431AR5S7, AS431AR5S13, AS431AR5LPV, AS431A2LPT, AS431A2LPB, AS431A2LPA, AS431A2LP7, AS431A2LP13, AS431A2DT, AS431A2DBVT, AS431A2DBVB, AS431A2DBVA, AS431A2DBV7, AS431A1LPT, AS431A1LPB, AS431A1LPA, AS431A1LP7, AS431A1LP13, AS431A1DT, AS431A1DBVT, AS431A1DBVB, AS431A1DBVA, AS431A1DBV7, AS431A1DBV13, AS431A1DB, AS431A1DA, AS431A1D7, AS431A1D13, AS431A1D, AS431C2ST, AS431C2S13, AS431CR25DT, AS431CR25DBVA, AS431C2D13, AS431BR25LPB, AS431BR25LP13, AS431BR5D13, AS431BR25LPT, AS431C1D7, AS431B2S13 Datasheet (ASTEC)

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Page 1

ASTEC Semiconductor

AS431

Precision Adjustable Shunt Reference

Features

Temperature-compensated: 30 ppm/¡C

Trimmed bandgap reference

Internal amplifier with 150mAcapability

Multiple temperature ranges

Low frequency dynamic output impedance: < 150 m½

Low output noise

Robust ESD protection

Description

The AS431 is a three-terminal adjustable shunt regulator providing a highly accurate bandgap reference. The adjustable shunt regulator is ideal for a wide variety of linear applications that can be implemented using external components to obtain adjustable currents and voltages.

In the standard shunt configuration, the combination of low temperature coefficient (TC), sharp turn-on characteristics, low output impedance and programmable output voltage make this precision reference a perfect zener diode replacement.

The AS431 precision adjustable shunt reference is offered in four bandgap tolerances: ±0.25%, ±0.5%, ±1.0%, and ±2.0%.

Pin ConfigurationÑTop view

Ordering Information

CATHODE

TO-92 (LP) SOIC (D)

ANODE

REFERENCE

CATHODE

REFERENCE

ANODE

N/C

CATHODE

ANODE

N/C

SOT-89 (S)

SOT-23/5L (DBV)

ANODE

REFERENCE

ANODE

REFERENCE

N/C

CATHODE

Circuit Type: Precision Adjustable Shunt Regulator

Temperature Range: A B C

Bandgap Tolerance: 2 1 R5 R25

= 0°C to 70°C = 0°C to 105°C = –40°C to +85°C

= ±2% = ±1% = ±0.5% = ±0.25%

Packaging Option: A B T 7 13

Package Style: D DBV LP S

= Ammo Pack = Bulk = Tube = Tape and Reel (7" Reel Dia) = Tape and Reel (13" Reel Dia)

= SOIC = SOT-23/5L = TO-92 = SOT-89

AS431 A 2 D 7

SEMICONDUCTOR

Page 2

ASTEC Semiconductor

AS431 Precision Adjustable Shunt Reference

Functional Block Diagram

Absolute Maximum Ratings

Parameter Symbol Rating Units

Cathode-Anode Reverse Breakdown V

37 V

Anode-Cathode Forward Current I

1 A

Operating Cathode Current I

250 mA

Reference Input Current I

REF

10 mA

Continuous Power at 25¡C P

TO-92 775 mW

8L SOIC 750 mW

SOT-89 1000 mW

SOT-23/5L 200 mW

Junction Temperature T

150 ¡C

Storage Temperature T

STG

Ð65 to 150 ¡C

Lead Temperature, Soldering 10 Seconds T

300 ¡C

Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating 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 absolute maximum rating conditions for extended periods may affect reliability.

REFERENCE

(R)

ANODE (A)

CATHODE (K)

2.5 V

Recommended Conditions

Parameter Symbol Rating Unit

Cathode Voltage V

REF

to 20 V

Cathode Current I

10 mA

Typical Thermal Resistances

Package θ

Typical Derating

TO-92 160¡C/W 80¡C/W 6.3 mW/¡C

SOIC 175¡C/W 45¡C/W 5.7 mW/¡C

SOT-89 110¡C/W 8¡C/W 9.1 mW/¡C

SOT-23/5L 575¡C/W 150¡C/W 1.7 mW/¡C

Page 3

ASTEC Semiconductor

AS431Precision Adjustable Shunt Reference

Electrical Characteristics

Electrical Characteristics are guaranteed over full junction temperature range (0 to 105¡C). Ambient temperature must be derated based on power dissipation and package thermal characteristics. The conditions are: VKA= V

REF

and IK= 10 mA unless otherwise stated.

Test AS431 (0.25%) AS431 (0.5%) Test

Parameter Symbol Condition Min. Typ. Max. Min. Typ. Max. Unit Circuit

Reference Voltage V

REF

TA= 25¡C 2.496 2.503 2.509 2.490 2.503 2.515 V 1

Over temp. 2.475 2.530 2.469 2.536 V 1

ÆV

REF

with Temp* TC 0.07 0.20 0.07 0.20 mV/¡C 1

Ratio of Change in ÆV

REFVREF

to 10 V Ð2.7 Ð1.0 Ð2.7 Ð1.0

REF

to Cathode

ÆV

mV/V 2

Voltage 10 V to 36 V Ð2.0 Ð0.4 0.3 Ð2.0 Ð0.4 0.3

Reference Input I

REF

0.7 4 0.7 4 µA 2

Current

REF

Temp Deviation ÆI

REF

Over temp. 0.4 1.2 0.4 1.2 µA 2

Min IKfor Regulation I

K(min)

0.4 1 0.4 1 mA 1

Off State Leakage I

K(off)

REF

= 0 V, 0.04 250 0.04 250 nA 3

VKA= 36 V

Dynamic Output Z

f ² 1 kHz 0.15 0.5 0.15 0.5 ½ 1

Impedance IK= 1 to 150 mA

Test AS431 (1.0%) AS431 (2.0%) Test

Parameter Symbol Condition Min. Typ. Max. Min. Typ. Max. Unit Circuit

Reference Voltage V

REF

TA= 25¡C 2.470 2.495 2.520 2.440 2.490 2.550 V 1

Over temp. 2.449 2.541 2.430 2.569 V 1

ÆV

REF

with Temp* TC 0.07 0.20 0.07 0.20 mV/¡C 1

Ratio of Change in ÆV

REFVREF

to 10 V Ð2.7 Ð1.0 Ð2.7 Ð1.0

REF

to Cathode

ÆV

mV/V 2

Voltage 10 V to 36 V Ð2.0 Ð0.4 0.3 Ð2.0 Ð0.4 0.3

Reference Input I

REF

0.7 4 0.7 4 µA 2

Current

REF

Temp Deviation ÆI

REF

Over temp. 0.4 1.2 0.4 1.2 µA 2

Min IKfor Regulation I

K(min)

0.4 1 0.4 1 mA 1

Off State Leakage I

K(off)

REF

= 0 V, 0.04 250 0.04 250 nA 3

VKA= 36 V

Dynamic Output Z

f ² 1 kHz 0.15 0.5 0.15 0.5 ½ 1

Impedance IK= 1 to 150 mA

*Calculating Average Temperature Coefficient (TC). Refer to following page.

Page 4

ASTEC Semiconductor

AS431 Precision Adjustable Shunt Reference

Test Circuits

Average Temperature Coefficient

Figure 1a. Test Circuit 1 Figure 1b. Test Circuit 2 Figure 1c. Test Circuit 3

–10

–20

0.55000

0 0

0 15

0.07 mV/°C

0.003%/°C 27 ppm/°C

30 45 60 75 90 105

ppm

∆V

REF

∆T

Temperature (°C)

• TC in mV/°C =

• TC in %/°C =

∆T

X 100

∆V

REF

(mV)

REF

at 25°C

∆V

REF

• TC in ppm/°C = ∆T

X 10

REF

at 25°C

∆V

REF

)

REF

VKA = V

REF

K (OFF)

VKA

Page 5

ASTEC Semiconductor

AS431Precision Adjustable Shunt Reference

Typical Performance Curves

Figure 2

Figure 4

Figure 3

Figure 5

– Cathode Current (µA)

900

700 600

500 400 300 200

100

0 –100 –200

800

–1.0 0 1.0

– Cathode Voltage (V)

2.0 3.0

Low Current Operating Characteristics

VKA = V

REF

Temperature Range: –55 to 125°C

125°C

25°C

–55°C

– Cathode Current (mA)

150 125 100

75 50 25

–25 –50 –75

–100

–2 –1 0 1 2 3

– Cathode Voltage (V)

High Current Operating Characteristics

VKA = V

REF

Temperature Range: –55 to 125°C

off – Off State Cathode Current (nA)

100

0.1

0.01

–60 –30 0 30

– Ambient Temperature (°C)

60 90 120

Off State Leakage

VKA = 36 V V

REF

= 0 V

REF

– Reference Voltage (V)

2.56

2.55

2.54

2.53

2.52

2.51

2.50

2.49

2.48

–60 –30 0 30

TA – Ambient Temperature (°C)

60 90 120

VKA = V

REF

IK = 10 mA

Temperature Coefficient as a Function of Trim Value

REF

= 2.503 V at 25°C

Page 6

ASTEC Semiconductor

AS431 Precision Adjustable Shunt Reference

Typical Performance Curves

Figure 6

Figure 8

Figure 7

Figure 9

3.0

2.5

2.0

1.5

1.0

0.5

–60 –30 0 30 60 90 120

REF

– Reference Input Current (µA)

TA – Ambient Temperature (°C)

Reference Input Current

R1 = 10 kΩ R2 = ∞ I

=10 mA

–10

–20

–30

–40

–50

0 3 6 9

– Cathode Voltage (V)

12 15 18 21 24 27 30

REF

–

Change in Reference Voltage (mV)

IK = 10 mA

Temperature Range: –55 to 125°C

Reference Voltage Line Regulation

125°C

–55°C

75°C

25°C

0°C

10 100 1 k

f – Frequency (Hz)

10 k 100 k

Noise Voltage nV/√H

VKA = V

REF

IK = 10 mA T

= 25°C

Noise Voltage

– Dynamic Impedance (Ω)

0.150

0.125

0.100

0.075

0.050

0.025

0.0

–60 –30 0 30

TA – Free Air Temperature

60 90 120

VKA = V

REF

IKA = 1 to 100 mA f ≤ 1 kHz

Low Frequency Dynamic Output Impedance

Page 7

ASTEC Semiconductor

AS431Precision Adjustable Shunt Reference

Typical Performance Curves

Figure 10

Figure 11

100

1.0

– Dynamic Impedance (Ω)

0.1

0.01 1 k 10 k 100 k

f – Frequency (Hz)

1 M 10 M

TA = 25°C I

= 1 to 100 mA

Dynamic Output Impedance

1 k 10 k 100 k 1 M 10 M

f – Frequency (Hz)

230 Ω

– Small Signal Voltage Gain (dB)

Temperature Range: –55 to 125°C

= 10 mA

OUT

GND

15 k

8.25 k

9 µF

Small Signal Voltage Gain vs. Frequency

Page 8

ASTEC Semiconductor

AS431 Precision Adjustable Shunt Reference

Figure 12

Input and Output Voltages (V)

–1

0 1 2 3 4 5 6 7

t – Time (µs)

8 9 10 11 12

Input

Output

Pulse Response

INPUT MONITOR

220 Ω

50 Ω

OUT

GND

fP = 100 kHz

Figure 13

100

90 80 70 60

50 40 30 20

0101102103

CL – Load Capacitance (pF)

10410510610

150 Ω

10 K

TA = 25°C

Stability Boundary Conditions

Stability Region

– Cathode Current (mA)

A: VKA = V

REF

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

= 10 V at IK = 10 mA

D: V

= 15 V at IK = 10 mA

Typical Performance Curves

Datasheet AS431CR5ST, AS431CR5SB, AS431CR5SA, AS431CR5S7, AS431CR5S13 Datasheet (ASTEC)

Specifications and Main Features

Frequently Asked Questions

User Manual