Advanced Monolithic Systems AMS431L Service Manual

http://www.BDTIC.com/AMS

Advanced AMS431L

Monolithic 1.2V SHUNT REGULATOR Systems

RoHS compliant

FEATURES APPLICATIONS

• Trimmed 0.5% Tolerance • Battery Powered Systems

• Wide Operating Current Range 60µA to 100mA • Switching Power Supplies

• Low Reference Input Current 0.4µA • Adjustable Power Supplies

• Low Dynamic Output Impedance • Telecommunications

• Low Output Noise • Error Amplifiers

• Nominal Temperature Range to 85°C • Notebook/Personal Computer

• Temperature-Compensated: 60ppm/°C • Monitors/ VCR/ TV

GENERAL DESCRIPTION

The AMS431L is a three-terminal adjustable shunt regulator with guaranteed temperature stability over the entire range of operation. The output voltage can be set to any value between 1.24V (V AMS431L features 0.5% initial tolerance, low dynamic output impedance and operates over a wide current range. Due to the sharp turn-on characteristics this device is an excellent replacement for zener diodes in many applications. AMS431 is available in TO-92, SOT-89, 3 pin SOT-23 and 5 pin SOT-23 packages.

ORDERING INFORMATION:

TOL. PACKAGE TYPE OPERATING

TO-92 SOT-89 3 LEAD SOT-23 5 LEAD SOT-23

±0.5% ±1.0% ±2.0%

AMS431LAN AMS431LAL AMS431LAM AMS431LAM1 AMS431LBN AMS431LBL AMS431LBM AMS431LBM1 AMS431LCN AMS431LCL AMS431LCM AMS431LCM1

PIN CONNECTIONS

TO-92 SOT-89 3L SOT-23 5L SOT-23

Plastic Package (N) (L) (M) (M1)

123

REF

ANODE

CATHODE

Bottom View Top View Top View Top View

123

CATHODEANODEREF

• Pagers

) and 20V by adding two external resistors. The

REF

TEMP. RANGE

-40 to +85° C

ANODE

CATHODEREF

N/C ANODE N/C

CATHODE

1 2 3

5

4

REFERENCE

Advanced Monolithic Systems, Inc.

http://www.BDTIC.com/AMS

AMS431L

ABSOLUTE MAXIMUM RATINGS (Note 1)

Cathode Voltage (VZ) 20V Internal Power Dissipation (PD) Continuous Cathode Current (I Reference Input Current (I Junction Temperature (T SOT-23-5 Package 0.3 W Storage temperature Lead Temperature (Soldering, 25sec.) SOT-89 Package SOT-23-3 Package SOT-23-5 Package

Note 1 : Absolute Maximum Ratings indicate limits beyond which dam a ge to the device may occur. Operating Ratings indicate conditions for which the

device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics

. The guaranteed specifications apply only for the test conditions listed.

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at IZ =10 mA and TA = +25°C unless otherwise noted.

Parameter

Conditions

) 100mA TO-92 Package 0.78W

Z

) 3mA SOT-89 Package 0.91W

REF

)

J

-40°C to +125°C

-65°C to +150°C 265°C

AMS431LA

Min Typ Max

SOT-23-3 Package 0.28W

Thermal Resistance (θ

)

JA

TO-92 Package

AMS431LB

Min Typ Max

AMS431LC

Min Typ Max

160°C/W 110°C/W 410°C/W 410°C/W

Units

Reference Voltage 1.234 1.240 1.246 1.228 1.240 1.252 1.215 1.240 1.265 V Deviation of Reference

Input Voltage over Temperature

Ratio of Change in Reference Voltage to Cathode Voltage

Reference Input Current

Reference Input Current Deviation over Temperature

Off State Cathode Current

Dynamic Output Impedance

Minimum Operating Current

= V

V T

A

I

Z

∆V = from V

R1 =10kΩ, R2 = ∞Ω (test circuit 2)

R1 =10kΩ, R2 = ∞Ω T

A

(test circuit 2) VZ = 6V, V

( test circuit 3) f < 1KHz, VZ = V

IZ =100µA to 100mA (test circuit 1)

VZ = V (test circuit 1)

(circuit 1)

Z

REF

= -40°C to +85°C

= 10mA

REF

= Full Range

= 0V

REF

0.15 0.5 0.15 0.5 0.15 0.5

0.1 0.4 0.1 0.4 0.1 0.4

0.04 0.1 0.04 0.1 0.04 0.1

0.25 0.4 0.25 0.4 0.25 0.4

60 80 60 80 60 80

10

-0.5

25

-2.7 -0.5 -2.7 -0.5 -2.7 mV/V

10

25

10

35

mV

µA

Ω

µA

RECOMMENDED OPERATING CONDITIONS:

Min Max

Cathode Voltage, (VZ) V Cathode Current, (IZ)

20 V

REF

80µA

100mA

Advanced Monolithic Systems, Inc.

http://www.BDTIC.com/AMS

AMS431L

TEST CIRCUITS

I

Z

VZ = V

REF

V

IN

R1

R2

V

IN

I

REF

V

REF

V

Z

I

REF

V

REF

I

Z

V

IN

Figure 1. Test Circuit for VZ=V

Figure 2. Test Circuit for V

REF

Test circuit for I

REF

vs IZ.

.

Figure 3. Test Circuit for Off-State Current

TYPICAL APPLICATIONS

V

Z

IZ OFF

V

GND

IN

R1

V

REF

R2

V

OUT

1) Set the V

2) Choose the value of R as follows:

• The maximum limit for R should be such that the cathode current, I

• The minimum limit for R should b such that I

exceed 150mA. Both of the following conditions must be met:

according to the following equation:

OUT

R1

⎞

⎛

1V V REFREFOUT +

+=

⎜

R2

⎝

IN(max)

V

min Ion - turnousinstantanelimit to

R ≥

R Z

min

≥

()

150mA

OUTIN(max)

V-V

OUT(min)

100mAI

+

R1I

⎟ ⎠

()

does not exceed 100mA under all load conditions, and the instantaneous turn-on value for IZ does not

Z

conditions operating normalunder Ilimit to

is greater than the minimum operating current (80µA) at V

Z

IN(min)

.

Advanced Monolithic Systems, Inc.

http://www.BDTIC.com/AMS

TYPICAL PERFORMANCE CHARACTERISTICS

AMS431L

Cathode Current vs. Cathode Voltage

300

TA =25° C

VR= V

A)

µ

200

REF

100

0

-100

-200

CATHODE CURRENT (

-300

-1

-0.5

0

CATHODE VOLTAGE (V)

Reference Input Current vs. Junction Temperature

150

IZ= 10mA R1= 10k

Ω

R2=

125

∞

100

75

REFERENCE INPUT CURRENT (nA)

50

-50

-25 0

25 50 75 100 125

JUNCTION TEMPERATURE (° C)

0.5 1

1.5

150

Cathode Current vs. Cathode Voltage

150

TA =25° C

VR= V

100

REF

50

0

-50

-100

CATHODE CURRENT (mA)

-150

-1.5 -1 0 0.5 1

-0.5

CATHODE VOLTAGE (V)

Ratio of Delta Reference Voltage to Delta Cathode Voltage vs. Junction Temperature

1.2

IZ= 10mA

1.1

∆

1.0

VZ= 16V to V

REF

0.9

0.8

0.7

(-mV/V)

Z

0.6

V

0.5

∆

/

0.4

REF

V

0.3

∆

0.2

0.1

0.0

-50

-25 0

25 50 75 100 125

JUNCTION TEMPERATURE (° C)

1.5

150

Reference Voltage vs. Junction Temperature

1.248

1.246

IZ= 100mA

1.244

1.242

1.240

1.238

1.236

REFERENCE VOLTAGE (V)

1.234

-50

-25 0

25 50 75 100 125

IR= 60µA

JUNCTION TEMPERATURE (° C)

Off State Cathode Current vs. Junction Temperature

250

V

= 0V

REF

200

VR= 16V

150

100

50

0

-50

CATHODE CURRENT(OFF STATE) (nA)

-25 0

25 50 75 100 125

V

JUNCTION TEMPERATURE (° C)

Z

150

= 6V

150

Reference Impedance vs. Junction Temperature

0.50

IZ = 0.1 to 100mA

)

0.45

VZ= V

Ω

0.40

f< 1kHz

REF

0.35

0.30

0.25

0.20

0.15

0.10

0.05

REFERENCE IMPEDANCE (

0

-25 0

-50 25 50 75 100 125 JUNCTION TEMPERATURE (° C)

Advanced Monolithic Systems, Inc.

150

Reference Impedance vs. Frequency

100

)

Ω

TA =25° C

10

1

0.1

REFERENCE IMPEDANCE (

0.01 1

10

100 1000 100000

FREQUENCY (kHz)

http://www.BDTIC.com/AMS

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

Small Signal Gain and Phase Shift vs. Frequency

80 70 60

50 40 30 20 10

0

SMALL SIGNAL GAIN (dB)

-10

-20 1k 10k 100k 1000k

100

FREQUENCY (Hz)

-180

-225

-270

-315

-360

PHASE SHIFT (deg)

Small Signal Gain and Phase Shift

10µF

15k

8.25k

Test Circuit

I

Z

232

+

-

AMS431L

OUT

GND

Stability Boundary Condition

3.5

TA =25° C

3.0

Stable

2.5

2.0

1.5

1.0

0.5

CATHODE CURRENT (mA)

0.0

0.001

0.01

LOAD CAPACITANCE (

0.1

VZ = V

VZ = 2V

1

Stable

REF

µ

F)

10

+

-

Stability Circuit

I

Z

R1

C

L

R2

Advanced Monolithic Systems, Inc.

http://www.BDTIC.com/AMS

PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.

3L TO-92 PLASTIC PACKAGE (N)

0.060±0.005

(1.524±0.127)

DIA

0.180±0.005

(4.572±0.127)

0.180±0.005

(4.572±0.127)

0.90

(2.286)

NOM

AMS431L

0.060±0.010

(1.524±0.254)

0.140±0.010

(3.556±0.127)

10°

NOM

N (TO-92 ) AMS DRW# 042391

0.500

(12.70)

MIN

0.050±0.005 (1.270±0.127)

UNCONTROLLED

0.050 (1.270)

LEAD DIMENSIONS

MAX

0.016±0.003

(0.406±0.076)

5° NOM

0.015±0.002

(0.381±0.051)

5 LEAD SOT-23 PLASTIC PACKAGE (M1)

0.110-0.120

(2.794-3.048)

0.102-0.118

(2.60-3.00)

0.059-0.070

(1.50-1.75)

0.037 (0.95) TYP

0.018-0.024

(0.457-0.610)

0.036-0.051

(0.090-1.30)

0.003 (0.150) MAX

Advanced Monolithic Systems, Inc.

0.075 (1.90) TYP

0.014-0.020 (0.350-0.50)

10°

NOM

10°

NOM

0.018-0.024 (0.457-0.610)

0.0035-0.0080 (0.090-0.20)

(SOT-23-5 ) AMS DRW# 051001

http://www.BDTIC.com/AMS

PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued).

3 LEAD SOT-23 PLASTIC PACKAGE (M)

0.110-0.120

(2.794-3.048)

0.015-0.017

(0.381-0.432)

0.083-0.098

(2.108-2.489)

0.047-0.055

(1.194-1.397)

0.035-0.040

(0.889-1.016)

AMS431L

0.018-0.024

(0.457-0.610)

0.035-0.041

(0.089-1.041)

0.0005-0.0040 (0.013-0.102)

0.070-0.080

(1.778-2.032)

10°

NOM

10°

NOM

0.018-0.024 (0.457-0.610)

0.0034-0.0050 (0.086-0.127)

(SOT-23 ) AMS DRW# 051991

SOT-89 PLASTIC PACKAGE (L)

0.173-0.181

0.155-0.167 (3.94-4.25)

0.090-0.102

(2.29-2.60)

(4.40-4.60)

0.064-0.072 (1.62-1.83)

0.055-0.063 (1.40-1.60)

0.084-0.090 (2.13-2.29)

0.014-0.017 (0.35-0.44)

0.059 (1.50)

BSC

Advanced Monolithic Systems, Inc.

0.118 (3.00)

BSC

0.017-0.022 (0.44-0.56)

0.035-0.047 (0.89-1.20)

0.014-0.019 (0.36-0.48)

L (SOT-89 ) AMS DRW# 042392

Advanced Monolithic Systems AMS431L Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual