Datasheet TS432 Datasheet (ST)

1.24 V adjustable shunt voltage reference

Features

■ 1.24 V typical output voltage

■ Ultra low operating current: 60 µA maximum at

25° C

■ High precision at 25° C:

+/- 1%
+/- 0.5%

■ High stability when used with capacitive loads

■ Industrial temperature range: -40° C to +85° C

■ 100 ppm/°C temperature coefficient

Applications

TS432

L

SOT23-3L

(Plastic micropackage)

Pin connections

(top view)

■ Computers

■ Instrumentation

■ Battery chargers

■ Switch mode power supply

■ Battery operated equipments

Description

The TS432 is an adjustable low power shunt
voltage reference providing an output voltage
from 1.24 V to 10 V over the industrial
temperature range (-40° C to +85° C). Available in
SOT23-3 surface mount package, it can be
designed in applications where space saving is
critical.

The low operating current is also a k ey adv antage
for power restricted designs. In addition, the
TS432 is very stable and can be used in a broad
range of application conditions.

SOT23-3

Ref

Reference

A

Anode

K

Cathode

April 2008 Rev 2 1/11

www.st.com

11

Absolute maximum ratings and operating conditions TS432

1 Absolute maximum ratings and operating conditions

Table 1. Absolute maximum ratings (AMR)

Symbol Parameter Value Unit

V

I

P
R
T

T

Cathode voltage 12 V

K

I

Cathode current -10 to +20 mA

K

Reference input current -0.05 to +3 mA

ref

Power dissipation

d

Thermal resistance junction to ambient for SOT23-3 360 °C/W

thja

Lead temperature (soldering 10 seconds) 250 °C

lead

Storage temperature -65 to +150 °C

stg

T

Junction temperature 150 °C

j

(1)

SOT23-3

340 mW

HBM: human body model 1.5 kV

ESD

MM: machine model 150 V

1. Pd is calculated with T

Table 2. Operating conditions

= 25° C, Tj = 150° C and R

amb

= 360° C/W.

thja

Symbol Parameter Value Unit

V

T

Cathode voltage 1.24 to 10 V

K

Cathode current 60µ to 12m A

I

K

Ambient temperature -40 to +85 °C

amb

2/11

TS432 Electrical characteristics

2 Electrical characteristics

Table 3. T

= 25°C (unless otherwise specified)

amb

Symbol Parameter Test conditions Min. Typ. Max. Unit

= 100µA, VK=V

I

K

V

Reference voltage

ref

REF

1.24

TS432A (0.5%) 1.234 1.246

Reference voltage tolerance over

ref

temperature

Minimum operating current

Reverse breakdown voltage change with

ref

operating current range

Reference voltage change with output

/ΔV

K

voltage change

Reference input current

ref

Off-state cathode current

Static impedance ΔIK = 100µA to 12mA 0.25 0.5 W

KA

Long term stability IK = 100µA, t = 1000hrs 120 ppm

VH

Wide band noise

N

= 100µA, VK=V

I

K

T

= 25°C 40 60

amb

-40°C < T
I

Kmin

-40°C < T
1mA < I

-40°C < T
= 10mA, VK=10V to V

I

K

-40°C < T
=10mA, R1=10KΩ,

I

K

R2=+

-40°C < T

V

REF

-40°C < T

= 100µA

I

K

amb

< IK < 1mA 0.7 1.5

amb

< 12mA 2 4

K

amb

amb

∞

amb

=0, VK=10V 1 100

amb

REF

< +85°C 65

< +85°C 2

< +85°C 6

REF

< +85°C 3

< +85°C 200

< +85°C 150

100Hz < F < 10kHz

716mV

1.8 2.5

50 100

200 nV/√Hz

ΔV

ΔV

I

Kmin

ΔV

ref

I

I

OFF

R
K

E

VTS432 (1%) 1.228 1.252

μA

mV

mV/V

nA

nA

Note: Limits are 100% production tested at 25° C. Behavior over the temperature range is

guaranteed through correlation and by design.

3/11

Electrical characteristics TS432

Figure 1. Reference voltage vs temperature Figure 2. Test circuit for VK = V

ref

1.252

1.248

1.244

VK = V

REF

IK = 100µA

Input

Output

Ik

1.240

V

K

1.236

Reference Volt age (V)

V

1.232

1.228

-40 0 40 80 120

REF

Temperature (°C)

Figure 3. Cathode voltage vs cathode current Figure 4. Cathode voltage vs cathode current

10

VK = V

5

T

AMB

REF

= +25°C

0

Cathode current (mA)

K

I

-5

1.5

T

=-40°C

AMB

1.0

T

=+25°C

AMB

T

=+85°C

AMB

Cathode voltage (V)

K

0.5

V

T

AMB

=+125°C

-10

-1.0 -0.5 0.0 0.5 1.0 1.5

VK Cathode voltage (V)

Figure 5. Reference input current vs

temperature

100

80

60

40

Reference current (nA)

REF

I

20

0

-40 0 40 80 120

Temperature (°C)

IK = 10 mA

= 10 KΩ

R

1

R2 = + ∞

0.0
0 204060

IK Cathode current (µA)

Figure 6. Static impedance vs temperature

0.4

VK = V

0.3

0.2

Static impedance (Ohms)

KA

R

0.1

0.0

-40 0 40 80 120

Temperature (°C)

REF

IK = 100 µA to 12 mA

4/11

TS432 Electrical characteristics

Figure 7. Off-state current vs temperature Figure 8. Test circuit for off-state current

measurement

150

V

= 0 V

100

Off-State current (nA)

50

OFF

I

0

-40 0 40 80 120

REF

= 10 V

V

K

Temperature (°C)

Figure 9. Ratio of change in reference input

voltage to change in V

voltage vs

K

Input

Figure 10. Test circuit for V

I

OFF

KA

> V

REF

V

=10V

K

temperature

3

2

IK = 10 mA
V

= 10V to V

K

REF

Input

R1

V

K

K

I

I

REF

1

0

Ratio of change in Reference input voltage (mV/V)

-40 0 40 80 120

Temperature (°C)

R2

VK= V

V

REF

REF

. (1+R1/R2) + I

REF

. R1

Figure 11. Phase and gain vs frequency Figure 12. Test circuit for phase and gain

measurement

60

T

Gain

40

Gain (dB)

20

0

Phase

2

10

3

10

4

10

Frequency (Hz)

AMB

10

= +25°C

5

180

120

60

Phase (Degree)

1 µF

23.5 kΩ

33 kΩ

5V

22 µF

Output

0

6

10

Input

33 kΩ

5/11

Electrical characteristics TS432

Output

Pulse

I

=100 µA

K

Figure 14. Test circuit for pulse response at

IK=1mA

18K

Ω

IK = 100µA

Intput

0V

3V

Pulse

Generator

f=10KHz

Intput

1.8K

Ω

IK=1mA

Figure 13. Test circuit for pulse response at

3V

V

Generator

f=10KHz

Figure 15. Pulse response at IK = 100 µA Figure 16. Pulse response at IK = 1 mA

3

Input

2

Output

3

Input

2

IK = 1 mA

= + 25°C

T

AMB

Output

Input and Ouput signals (Volt)

1

IK = 100 µA
T

= + 25°C

AMB

0

0 5 10 15

Time (µs)

1

Input and Output signals (Volt)

Output

0

0 5 10 15 20

Time (µs)

Figure 17. Pulse response at IK = 100 µA Figure 18. Pulse response at IK = 1 mA

3

Input

2

1

Input and Output signals (Volt)

0

0 5 10 15 20

Output

Time (µs)

IK = 100 µA

= + 25°C

T

AMB

3

Input

2

1

Input and Output signals (Volt)

0

-5 0 5 10 15 20

Output

Time (µs)

IK = 1 mA
T

= + 25°C

AMB

6/11

TS432 Electrical characteristics

Figure 19. Equivalent input noise vs

frequency

300

T

AMB

200

Noise (nV/√Hz)

100

0

2

10

3

10

4

10

Frequency (Hz)

10

5

= + 25°C

6

10

Figure 20. Block diagram

Vref

1.24V

7

10

Cathode

+

-

Anode

7/11

Package information TS432

3 Package information

In order to meet environmental requirements, STMicroelectronics offers these devices in
ECOPACK
category of second level interconnect is marke d on the pa ckage and on the inner box label,
in compliance with JEDEC Standard JESD97. The maximum ratings related t o soldering
conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics
trademark. ECOPACK specifications are available at: www.st.com

®

packages. These packages have a lead-free second level interconnect. The

.

8/11

TS432 Package information

Figure 21. SOT23-3 package mechanical drawing

7110469/A

Table 4. SOT23-3 package mechanical data

Dimensions

Ref.

Millimeters Mils

Min. Typ. Max. Min. Typ. Max.

A 0.890 1.120 35.05 44.12
A1 0.010 0.100 0.39 3.94
A2 0.880 0.950 1.020 34.65 37.41 40.17

b 0.300 0.500 11.81 19.69

C 0.080 0.200 3.15 7.88

D 2.800 2.900 3.040 110.26 114.17 119.72

E 2.100 2.64 82.70 103.96
E1 1.200 1.300 1.400 47.26 51.19 55.13

e 0.950 37.41
e1 1.900 74.82

L 0.400 0.600 15.75 23.63
L1 0.540 21.27

k0°8°0°8°

9/11

Ordering information TS432

4 Ordering information

Table 5. Order codes

Precision Order code

1% TS432ILT

0.5% TS432AILT L236

5 Revision history

Table 6. Document revision history

Date Revision Changes

16-Dec-2002 1 Initial release.

7-Apr-2008 2

Temperature

range

-40° C to
+85° C

Corrected package me ch an i c a l da ta .
Updated document format.

Package Packing Marking

SOT23-3 Tape & reel

L235

10/11

TS432

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