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AMS431LCN

更新时间：2024-09-18 02:22:38

品牌：ADMOS

描述：1.2V SHUNT REGULATOR

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AMS431LCN 概述

1.2V SHUNT REGULATOR 1.2V并联稳压器

AMS431LCN 数据手册

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Advanced

Monolithic

Systems

AMS431L

1.2V SHUNT REGULATOR

FEATURES

APPLICATIONS

· Trimmed 0.5% Tolerance

· Battery Powered Systems

· Switching Power Supplies

· Adjustable Power Supplies

· Telecommunications

· Error Amplifiers

· Wide Operating Current Range 60mA to 100mA

· Low Reference Input Current 0.4mA

· Low Dynamic Output Impedance

· Low Output Noise

· Nominal Temperature Range to 85°C

· Temperature-Compensated: 60ppm/°C

· Notebook/Personal Computer

· Monitors/ VCR/ TV

· Pagers

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_REF) and 20V by adding two external resistors. The

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

AMS431LAN

AMS431LBN

AMS431LCN

SOT-89

3 LEAD SOT-23

AMS431LAM

AMS431LBM

AMS431LCM

5 LEAD SOT-23

AMS431LAM1

AMS431LBM1

AMS431LCM1

TEMP. RANGE

AMS431LAL

AMS431LBL

AMS431LCL

±0.5%

±1.0%

±2.0%

-40 to +85° C

PIN CONNECTIONS

TO-92

Plastic Package (N)

SOT-89

(L)

3L SOT-23

(M)

5L SOT-23

(M1)

ANODE

N/C

N/C 2

CATHODE

ANODE

REFERENCE

CATHODE

REF

ANODE

REF ANODE CATHODE

REF CATHODE

Bottom View

Top View

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS431L

ABSOLUTE MAXIMUM RATINGS (Note 1)

Cathode Voltage (V_Z)

Continuous Cathode Current (I_Z)

20V

100mA

Internal Power Dissipation (P_D)

TO-92 Package

0.78W

0.91W

0.28W

0.3 W

Reference Input Current (I_REF

Junction Temperature (T_J)

)

3mA

-40°C to +125°C

SOT-89 Package

SOT-23-3 Package

SOT-23-5 Package

Thermal Resistance (q_JA)

TO-92 Package

Storage temperature

Lead Temperature (Soldering, 10sec.)

-65°C to +150°C

265°C

160°C/W

110°C/W

410°C/W

SOT-89 Package

SOT-23-3 Package

SOT-23-5 Package

Note 1 : Absolute Maximum Ratings indicate limits beyond which damage 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 I_Z=10 mA and T_A= +25°C unless otherwise noted.

AMS431LA

Typ

AMS431LB

Typ

AMS431LC

Typ

Parameter

Conditions

Units

Min

Max Min

Max

Reference Voltage

1.234

1.240

1.246

1.228

1.240

1.252

1.215

1.240

1.265

Deviation of Reference

Input Voltage over

Temperature

V_Z= V_REF(circuit 1)

T_A= -40°C to +85°C

-0.5

0.15

0.1

I_Z= 10mA

-2.7

0.5

0.4

-0.5

0.15

0.1

-2.7

0.5

0.4

-0.5

0.15

0.1

-2.7

mV/V

Ratio of Change in

Reference Voltage to

Cathode Voltage

DV = from V_REF

Reference Input Current

0.5

0.4

R1 =10kW, R2 = ¥ W

(test circuit 2)

Reference Input Current

Deviation over

Temperature

R1 =10kW, R2 = ¥ W

T_A= Full Range

(test circuit 2)

Off State Cathode

Current

V_Z= 6V, V_REF= 0V

( test circuit 3)

0.04

0.25

0.1

0.4

0.04

0.25

0.1

0.4

0.04

0.25

0.1

0.4

Dynamic Output

Impedance

f < 1KHz, V_Z= V_REF

I_Z=100mA to 100mA

(test circuit 1)

Minimum Operating

Current

V_Z= V_REF

(test circuit 1)

RECOMMENDED OPERATING CONDITIONS:

Min

V_REF

80mA

Max

20 V

100mA

Cathode Voltage, (V_Z)

Cathode Current, (I_Z)

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS431L

TEST CIRCUITS

V_Z= V_REF

V_Z

V_IN

I_REF

I_ZOFF

I_REF

I_Z

V_REF

Figure 1. Test Circuit for V_Z=V_REF

Figure 2. Test Circuit for V_REFvs I_Z.

Test circuit for I_REF

Figure 3. Test Circuit for Off-State Current

TYPICAL APPLICATIONS

V_IN

V_OUT

V_REF

GND

1) Set the V_OUTaccording to the following equation:

_{VOUT = VREF}æ₁₊

+ IREFR1

2) Choose the value of R as follows:

The maximum limit for R should be such that the cathode current, I_Zis greater than the minimum operating current (80mA) at V_IN(min).

The minimum limit for R should b such that I_Zdoes not exceed 100mA under all load conditions, and the instantaneous turn-on value for I_Zdoes not exceed

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

V_IN(max)

Rmin ³

(

to limit instantaneous turn - on IZ

)

150mA

VIN(max) - VOUT

(to limit IZ under normal operating conditions

)

IOUT(min) +100mA

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS431L

TYPICAL PERFORMANCE CHARACTERISTICS

Cathode Current vs. Cathode Voltage

Reference Voltage vs.

Junction Temperature

Cathode Current vs. Cathode Voltage

300

200

100

150

100

1.248

1.246

1.244

1.242

1.240

1.238

T_A=25° C

V_R= V_REF

T_A=25° C

V_R= V_REF

I_Z= 100mA

-100

-50

I_R= 60mA

-200

-300

-100

-150

1.236

1.234

-1

-50

-0.5

0.5

-1.5 -1

0.5

-25

25 50 75 100 125 150

1.5

-0.5

1.5

CATHODE VOLTAGE (V)

JUNCTION TEMPERATURE (° C)

Ratio of Delta Reference Voltage to Delta

Cathode Voltage vs. Junction Temperature

Off State Cathode Current vs.

Junction Temperature

Reference Input Current vs.

Junction Temperature

1.2

250

200

150

100

150

125

100

I_Z= 10mA

V_Z= 16V to V_REF

I_Z= 10mA

V_REF= 0V

1.1

1.0

0.9

0.8

R₁= 10kW

R =

V_R= 16V

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

-50

V_Z= 6V

-50

-25

25 50 75 100 125 150

-25

25 50 75 100 125 150

-25

25 50 75 100 125 150

JUNCTION TEMPERATURE (° C)

Reference Impedance vs.

Junction Temperature

Reference Impedance vs. Frequency

0.50

0.45

0.40

100

I_Z= 0.1 to 100mA

V_Z= V_REF

f< 1kHz

T_A=25° C

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.1

0.01

-50 -25

25 50 75 100 125

100

1000

100000

150

FREQUENCY (kHz)

JUNCTION TEMPERATURE (° C)

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS431L

TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

Small Signal Gain and Phase Shift

vs. Frequency

Small Signal Gain and Phase Shift

Test Circuit

-180

-225

OUT

I_Z

-270

15k

232

10mF

-315

-360

8.25k

GND

-10

-20

100

10k

100k

1000k

FREQUENCY (Hz)

Stability Boundary Condition

Stability Circuit

3.5

3.0

2.5

2.0

1.5

T_A=25° C

I_Z

Stable

C_L

V_Z= V_REF

1.0

0.5

0.0

V_Z= 2V

0.001

0.01

0.1

LOAD CAPACITANCE ( mF)

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS431L

PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.

3L TO-92 PLASTIC PACKAGE (N)

0.180±0.005

(4.572±0.127)

0.060±0.005

(1.524±0.127)

DIA

0.060±0.010

(1.524±0.254)

0.90

(2.286)

NOM

0.180±0.005

(4.572±0.127)

0.140±0.010

(3.556±0.127)

10°

NOM

5° NOM

0.500

(12.70)

MIN

UNCONTROLLED

LEAD DIMENSIONS

0.050

(1.270)

MAX

0.015±0.002

N (TO-92 ) AMS DRW# 042391

(0.381±0.051)

0.016±0.003

(0.406±0.076)

0.050±0.005

(1.270±0.127)

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)

0.014-0.020

(0.350-0.50)

0.037

(0.95)

TYP

0.018-0.024

(0.457-0.610)

10°

NOM

0.036-0.051

(0.090-1.30)

0.0035-0.0080

(0.090-0.20)

10°

NOM

0.003

(0.150)

MAX

0.075

(1.90)

TYP

0.018-0.024

(0.457-0.610)

(SOT-23-5 ) AMS DRW# 051001

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS431L

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)

0.018-0.024

(0.457-0.610)

10°

NOM

0.035-0.041

(0.089-1.041)

0.0034-0.0050

(0.086-0.127)

10°

NOM

0.0005-0.0040

(0.013-0.102)

0.070-0.080

(1.778-2.032)

0.018-0.024

(0.457-0.610)

(SOT-23 ) AMS DRW# 051991

SOT-89 PLASTIC PACKAGE (L)

0.173-0.181

(4.40-4.60)

0.055-0.063

(1.40-1.60)

0.014-0.017

(0.35-0.44)

0.064-0.072

(1.62-1.83)

0.155-0.167

(3.94-4.25)

0.084-0.090

(2.13-2.29)

0.090-0.102

(2.29-2.60)

0.035-0.047

(0.89-1.20)

0.059

(1.50)

BSC

0.014-0.019

(0.36-0.48)

0.017-0.022

(0.44-0.56)

L (SOT-89 ) AMS DRW# 042392

0.118

(3.00)

BSC

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

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