SPX2431AM datasheet, PDF - EEWORLD Datasheet

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SPX2431AM: Description1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO3, TO-236AB, SOT-23, 3 PIN; CategoryPower/power management The power supply circuit; File Size814KB，10 Pages; ManufacturerRochester Electronics; Websitehttps://www.rocelec.com/

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SPX2431AM Overview

1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO3, TO-236AB, SOT-23, 3 PIN

SPX2431AM Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Rochester Electronics
Parts packaging code	SOT-23
package instruction	TSSOP,
Contacts	3
Reach Compliance Code	unknown
Analog Integrated Circuits - Other Types	TWO TERMINAL VOLTAGE REFERENCE
JESD-30 code	R-PDSO-G3
JESD-609 code	e0
length	2.9 mm
Humidity sensitivity level	1
Number of functions	1
Output times	1
Number of terminals	3
Maximum operating temperature	105 °C
Minimum operating temperature
Maximum output voltage	2.52 V
Minimum output voltage	2.48 V
Nominal output voltage	2.5 V
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240
Certification status	COMMERCIAL
Maximum seat height	1.12 mm
surface mount	YES
Temperature level	OTHER
Terminal surface	TIN LEAD
Terminal form	GULL WING
Terminal pitch	0.95 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
Fine-tuning/adjustable output	YES
width	1.3 mm

SPX2431AM Preview

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SPX2431

Precision Adjustable Shunt Regulator

FEATURES

■

Trimmed Bandgap to 0.5% and 1.0%

■

Wide Operating Current 1mA to 100mA

■

Extended Temp. Range: 0°C to 105°C

■

Low Temperature Coefficient 30 ppm/°C

■

Offered in 3 Pin SOT-23 (M)

■

Replacement for TL431, AS2431

■

Low Noise Output

APPLICATIONS

■

Battery Operating Equipment

■

Adjustable Supplies

■

Switching Power Supplies

■

ANODE

SPX2431

3 Pin SOT-23

REF

Top View

CATHODE

Now Available in Lead Free Packaging

Error Amplifiers

Single Supply Amplifier

Monitors / VCRs / TVs

Personal Computers

DESCRIPTION

The SPX2431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate

bandgap reference. The SPX2431 acts as an open-loop error amplifier with a 2.5V temperature

compensation reference. The SPX2431’s thermal stability, wide operating current (100mA) and

temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a

low cost, high performance solution. SPX2431A tolerance of 0.5% is 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 manufacturer's assembly line and contribute a significant cost savings.

The output voltage may be adjusted to any value between V

REF

and 20 volts with two external

resistors. In the standard shunt configuration, the combination of a low temperature coefficient,

sharp turn on characteristics, low output impedance, and programmable output voltage makes

this precision reference an excellent error amplifier. The SPX2431 is available in SOT-23-3

package.

FUNCTIONAL DIAGRAM

Cathode (K)

Reference

(R)

2.5V

Anode (A)

Date: 1/19/05

SPX2431 Precision Adjustable Shunt Regulator

ABSOLUTE MAXIMUM RATINGS

Cathode-Anode Reverse Breakdown V

....................................... 20V

Anode-Cathode Forward Current, (<10ms) I

................................. 1A

Operating Cathode Current I

.................................................. 100mA

Reference Input Current I

REF

....................................................... 1.0mA

Continuos Power Dissipation at 25°C P

SOT-23 .................................................................. 200 mW

Junction Temperature T

........................................................... 150

°C

Storage Temperature T

STG

.............................................. -65 to 150

°C

NOTE:

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 condi-

tions for extended periods may affect reliability.

RECOMMENDED CONDITIONS

PARAMETER

Cathode Voltage

Cathode Current

SYMBOL

RATING

REF

to 20

UNIT

TYPICAL THERMAL RESISTANCES

PACKAGE

SOT-23

TYPICAL DERATING

1.7 mW/°C

575°C/W 150°C/W

Typical deratings of the thermal resistances are given for ambient

temperature >25°.

ELECTRICAL CHARACTERISTICS

Electrical characteristics at 25°C I

= 10mA V

= V

REF

, unless otherwise specified.

PARAMETER

SYMBOL

FIGURE

CONDITIONS

MIN

TYP

SPX2431A

Reference Voltage

∆V

REF

withTemp.*

Ratio of Change in V

REF

to Cathode Voltage

Reference Input Current

REF

Temp Deviation

Min I

for Regulation

Off State Leakage

Dynamic Output

Impedance

REF

∆

REF

∆V

REF

∆I

REF

K(MIN)

K(OFF)

REF

= 0V,

= 20V

≤

1kHz

= 1 to 100mA

= 0°C to 105°C

REF

to 10V

10V to 20V

-2.7

-2.0

= 0°C to 105°C

2.487

2.480

2.500

0.07

-1.01

-0.4

0.7

0.4

0.04

0.15

0.5

2.513

2.520

0.20

0.3

4.0

1.2

1.0

-2.7

-2.0

2.474

2.460

MAX

MIN

TYP

SPX2431

2.500

0.07

-1.01

-0.4

0.7

0.4

0.04

0.15

2.526

2.540

0.20

0.3

4.0

1.2

1.0

500

0.5

µA

Ω

mV/°C

mV/V

MAX

UNITS

Date: 1/19/05

SPX2431 Precision Adjustable Shunt Regulator

CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC)

ppm

∆V

REF

∆T

-5

•

TC in mV /

°C

∆

REF

(mV)

∆

•

TC in % /

°C

(

∆

REF

∆

REF

at 25°C

∆

)

x 100

5000

0.5

105

•

TC in ppm /

°C

(

∆

REF

∆

REF

at 25°C

∆

)

x 10

Junction Temperature (°C)

0.0033mV /°C

0.0027% /

°C

27ppm/°C

Figure 1. V

REF

VS Temperature

TEST CIRCUITS

KA =

REF

K (OFF)

REF

)

Figure 2. Test Circuit for V

= V

REF

Figure 3. Test Circuit for V

> V

REF

Figure 4. Test Circuit for I

KOFF

Date: 1/19/05

SPX2431 Precision Adjustable Shunt Regulator

TYPICAL PERFORMANCE CHARACTERISTICS

150

125

100

= V

REF

0°C to 105°C

2.53

2.52

= V

REF

= 10mA

REF

Reference Voltage (V)

Cathode Current (mA)

2.51

2.50

2.49

2.48

2.47

2.46

2.45

-60

-25

-50

-75

-100

-2

-1

Cathode Voltage (V)

-30

120

Ambient Temperature (°C)

Figure 5. High Current Operating Characteristics

Figure 6. Reference Voltage VS Ambient Tempetature

900

3.0

700

REF

Reference Input Current (µA)

800

= V

REF

0° to 105°C

2.5

2.0

1.5

1.0

0.5

-60

R1 = 10kΩ

R2 =

∞

= 10mA

Cathode Current (µA)

600

500

400

300

200

100

-100

-200

-1.0

1.0

2.0

Cathode Voltage (V)

3.0

105°C

25°C

-0°C

-30

120

Ambient Temperature (°C)

Figure 7. Low Current Operating Characteristics

Figure 8. Reference Input Current VS Ambient

Temperature

0°C

∆V

REF

(mV)

Noise Voltage n/√Hz

-10

= V

REF

= 10mA

= 25°C

100

10K

100K

-20

25°C

75°C

-30

= 10mA

-40

125°C

-50

12 15

27 30

Cathode Voltage (V)

f Frequency (Hz)

Figure 9. Reference Voltage Line Regulation VS

Cathode Voltage and T

AMBIENT

Figure 10. Noise Voltage VS Frequency

Date: 1/19/05

SPX2431 Precision Adjustable Shunt Regulator

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SPX2431AM Related Products

	SPX2431AM	SPX2431AM/TR
Description	1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO3, TO-236AB, SOT-23, 3 PIN	1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO3, TO-236AB, SOT-23, 3 PIN
Is it lead-free?	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible
Maker	Rochester Electronics	Rochester Electronics
Parts packaging code	SOT-23	SOT-23
package instruction	TSSOP,	TSSOP,
Contacts	3	3
Reach Compliance Code	unknown	unknown
Analog Integrated Circuits - Other Types	TWO TERMINAL VOLTAGE REFERENCE	TWO TERMINAL VOLTAGE REFERENCE
JESD-30 code	R-PDSO-G3	R-PDSO-G3
JESD-609 code	e0	e0
length	2.9 mm	2.9 mm
Humidity sensitivity level	1	1
Number of functions	1	1
Output times	1	1
Number of terminals	3	3
Maximum operating temperature	105 °C	105 °C
Maximum output voltage	2.52 V	2.52 V
Minimum output voltage	2.48 V	2.48 V
Nominal output voltage	2.5 V	2.5 V
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	TSSOP	TSSOP
Package shape	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240	240
Certification status	COMMERCIAL	COMMERCIAL
Maximum seat height	1.12 mm	1.12 mm
surface mount	YES	YES
Temperature level	OTHER	OTHER
Terminal surface	TIN LEAD	TIN LEAD
Terminal form	GULL WING	GULL WING
Terminal pitch	0.95 mm	0.95 mm
Terminal location	DUAL	DUAL
Maximum time at peak reflow temperature	30	30
Fine-tuning/adjustable output	YES	YES
width	1.3 mm	1.3 mm

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