ADMOS AMS2931T-5.0, AMS2931S-5.0, AMS2931N-5.0, AMS2931M-5.0, AMS2931CS Datasheet

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]

Advanced AMS2931
Monolithic 100mA LOW DROPOUT VOLTAGE REGULATOR
Systems

FEATURES APPLICATIONS

•• 5V and Adjustable Versions Available* •• Battery Powered Systems

•• Output Current in excess of 100mA •• Portable Consumer Equipment

•• Very Low Quiescent Current •• Cordless Telephones

•• Reverse Battery Protection •• Portable (Notebook) Computers

•• Input-output Differential less than 0.6V •• Portable Instrumentation

•• Short Circuit protection •• Radio Control Systems

•• Internal Thermal Overload Protection •• Automotive Electronics

•• 60V Load Dump Protection

•• -50V Reverse Transient Protection

•• Mirror Image Insertion Protection

GENERAL DESCRIPTION

The AMS2931 series consists of positive fixed and adjustable voltage regulators ideally suited for use in battery-powered
systems. These devices feature very low quiescent current of 1mA or less when supplying 10mA loads. This unique
characteristic and the extremely low input -output differential required for proper regulation (0.2V for output currents of
10mA) make the AMS2931 ideal to use for standby power systems.

Originally designed for automotive applications, the AMS2931 and all regulated circuitry are protected from input fault
conditions caused by reverse battery installation or two battery jump starts. During line transients, such as load dump (60V)
when the input voltage to the regulator can momentarily exceed the specified maximum operating voltage, the regulator will
automatically shut down to protect both internal circuits and the load. The AMS2931 series also includes internal current
limiting, thermal shutdown, and is able to withstand temporary power-up with mirror-image insertion.

The AMS2931 is offered in the 3-pin TO-92 package, 8-pin plastic SOIC, TO-220 and TO-263 packages.

ORDERING INFORMATION

OUTPUT PACKAGE TYPE OPER. TEMP

VOLTAGE

TO-92 8 LEAD SOIC TO-220 TO-263

RANGE

FIXED* AMS2931AN-X AMS2931AS-X AMS2931AT-X AMS2931AM-X IND

AMS2931N-X AMS2931S-X AMS2931T-X AMS2931M-X IND

ADJ. AMS2931CS IND
X = 5V
*For additional available fixed voltages contact factory

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]

AMS2931

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Voltage Maximum Junction Temperature

+125°C

Operating Range 26V Storage Temperature

-65°C to +150°C

Overvoltage Protection Lead Temperature (Soldering 10 sec)

230°C

AMS2931A-X, AMS2931C 60V ESD 2000V
AMS2931-X 50V
Internal Power Dissipation (Note 4) Internally Limited

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

IN

=14V, IO =10mA, TJ=25°C, C2 = 100µF unless otherwise specified.

PARAMETER CONDITIONS

AMS2931A-X

Min. Typ. Max.

AMS2931-X

Min. Typ. Max.

Units

5 V Versions

Output Voltage 4.81 5.0 5.19 4.75 5.0 5.25 V

6V ≤VIN ≤26V, IO=100 mA

-40°C ≤T

J

≤125°C

4.75 5.25 4.5 5.5

V

Line Regulation

9V ≤VIN ≤ 16V
6V ≤VIN ≤ 26V

2
4

10
30

2
4

10
30

mV
mV

Load Regulation

5mA ≤I

O

≤ 100 mA

14 50 14 50 mV

Dropout Voltage I

O

= 10 mA

I

O

= 100 mA

0.05

0.3

0.2

0.6

0.05

0.3

0.2

0.6

mV
mV

Quiescent Current

I

O

≤ 10 mA, 6V ≤ VIN ≤ 26V

-40°C ≤T

J

≤ 125°C

I

O

= 100 mA, V

IN

= 14V, TJ = 25°C

5

0.4

15

1.0

30

0.4

15

1.0

mA

mA

Output Noise Voltage

10Hz-100kHz, C

OUT

= 100µA

500 500

µV rms

Output Impedance 100mADC and 10mA

rms

,100Hz=10kHz 200 200

mΩ

Long Term Stability T =1000hr 20 20 mV
Ripple Rejection fO =120Hz

55

80 80 dB

Maximum Operational Input
Voltage

26 33 26 33 V

Maximum Line Transient

RL = 500Ω, VO ≤ 5.5V
T = 1ms, τ ≤100ms

60 70 50 70 V

Reverse Polarity Input Voltage,
D/C

-15 -30 -15 -30 V

Reverse Polarity Input Voltage,
Transient

RL = 500Ω, T = 1ms, τ ≤100ms

-50 -80 -50 -80 V

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]

AMS2931

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at V

IN

=14V, V

OUT

=3V IO =10mA, TJ=25°C, R1 =27k, C2 = 100µF unless otherwise specified.

PARAMETER CONDITIONS

(Note 2)

Min.

AMS2931C

Typ.

Max.

Units

Adjustable Version

Reference Voltage

1.14 1.20 1.26 V

IO ≤ 100 mA, -40°C ≤T

J

≤ 125°C, R1=27k,

Measured from V

OUT

to Adjust Pin

1.08 1.32

V

Output Voltage Range 3 24 V
Line Regulation

V

OUT

+ 0.6V ≤VIN ≤ 26V

.02 1.5 mV/V

Load Regulation

5mA ≤IO ≤ 100 mA

0.3 1 %

Dropout Voltage

I

O

≤ 10 mA

I

O

= 100 mA

0.05

0.3

0.2

0.6

V
V

Quiescent Current I

O

= 10 mA

I

O

= 100 mA

During Shutdown RL = 500Ω

0.4
15

0.8

1

1

mA
mA
mA

Output Noise Voltage 10Hz-100kHz 100

µV

rms

/V

Output Impedance 100mADC and 10mA

rms

,100Hz=10kHz 40

mΩ

Long Term Stability T =1000hr 0.4 %/1000hr
Ripple Rejection fO = 120Hz 0.02 %/V
Maximum Operational Input

Voltage

26 33 V

Maximum Line Transient

IO = 10mA, Reference Voltage ≤ 1.5V
T = 1ms, τ ≤100ms

60 70 V

Reverse Polarity Input Voltage,
D/C

RL = 500Ω, VO ≥ -0.3V

-15 -30 V

Reverse Polarity Input Voltage,
Transient

RL = 500Ω, T = 1ms, τ ≤100ms

-50 -80 V

On/Off Threshold Voltage
On
Off

VO = 3V

3.25

2.0

2.2

1.2 V
V

On/Off Threshold Current 20 50

µA

Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. For guaranteed performance limits and associated test conditions, see
the Electrical Characteristics tables.

Note 2: See Circuit in Typical Applications. To ensure constant junction temperature, low duty cycle pulse testing is used.
Note 3: Limits appearing in boldface type apply over the entire junction temperature range for operation. Limits appearing in normal type apply for

TA = TJ = 25°C.
Note 4: The junction-to-ambient thermal resistance are as follows: 195°C/W for the TO-92 (N) package, 160°C/W for the molded plastic SO-8 (S), 50°C/W for the
TO-220 package and 73°C/W for the TO-263 package. If the TO-220 package is used with a heat sink, θJA is the sum of the package thermal resistance junction-to­case of 3°C/W and the thermal resistance added by the heat sink and the thermal interface. The thermal resistance of the TO-263 package can be reduced by
increasing the PCB copper area thermally connected to the package: using 0.5 square inches of copper area, ϕ JA is 50°C/W; with 1 square inch of copper area ϕ JA is
37°C/W; and with 1.6 or more square inches of copper area ϕ JA is 32°C/W.