ST LD2981ABM25TR, LD2981ABU25TR, LD2981CU25TR, LD2981ABM30TR, LD2981ABU30TR User Manual

Ultra low drop voltage regulators with inhibit

low ESR output capacitors compatible

Features

■ Stable with low ESR ceramic capacitors

■ Ultra low dropout voltage (0.17 V typ. at 100

mA load, 7 mV typ. at 1 mA load)

■ Very low quiescent current (80 µA typ. at no

load in on mode; max 1 µA in off mode)

■ Guaranteed output current up to 100mA

■ Logic-controlled electronic shutdown

■ Output voltage of 2.5; 3.0; 3.3; 5.0 V

■ Internal current and thermal limit

■ ± 0.75 % tolerance output voltage available (A

version)

■ Output low noise voltage 160 µV

■

Temperature range: -40 to 125 °C

■ Smallest package SOT23-5L and SOT-89

■ Fast dynamic response to line and load

changes

RMS

LD2981ABxx

LD2981Cxx

SOT-89SOT23-5L

logic control function is available on pin n° 3 (TTL
compatible). This means that when thedevice is
used as local regulator, it is possible to put a part
of the board in standby, decreasing the total
power consumption. The LD2981AB/C is
designed to work with low ESR ceramic capacitor.
Typical applications are in cellular phone,
palmtop/laptop computer, personal digital
assistant (PDA), personal stereo, camcorder and
camera.

Description

The LD2981AB/C series are 100 mA fixed-output
voltage regulator. The low drop-voltage and the
ultra low quiescent current make them suitable for
low noise, low power applications and in battery
powered systems.

The quiescent current in sleep mode is less than
1 µA when INHIBIT pin is pulled low. Shutdown

Table 1. Device summary

Part numbers

Output voltage

AB Versio n C Vers ion

LD2981ABXX25 LD2981CXX25 2.5 V

LD2981ABXX30 LD2981CXX30 3.0 V

LD2981ABXX33 LD2981CXX33 3.3 V

LD2981ABXX50 LD2981CXX50 5.0 V

July 2008 Rev 14 1/23

www.st.com

23

LD2981ABxx - LD2981Cxx

Contents

1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7 Application notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.1 External capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.2 Input capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.3 Output capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.4 Important . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.5 Inhibit input operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.6 Reverse current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2/23

LD2981ABxx - LD2981Cxx Diagram

1 Diagram

Figure 1. Schematic diagram

3/23

Pin configuration LD2981ABxx - LD2981Cxx

2 Pin configuration

Figure 2. Pin connections (top view)

SOT23-5L

SOT-89

Table 2. Pin description

Pin n°

SOT23-5L

13V

2 2 GND Ground pin

3INHIBIT

4 NC Not connected

51V

Pin n°

SOT-89

Symbol Name and function

IN

Input port

Control switch ON/OFF. Inhibit is not internally pulled-up; it cannot be
left floating. Disable the device when connected to GND or to a
positive voltage less than 0.18 V

OUT

Output port

Table 3. Thermal data

Symbol Parameter SOT23-5L SOT-89 Unit

R

R

thJC

thJA

Thermal resistance junction-case 81 15 °C/W

Thermal resistance junction-ambient 255 110 °C/W

4/23

LD2981ABxx - LD2981Cxx Maximum ratings

3 Maximum ratings

Table 4. Absolute maximum ratings

Symbol Parameter Value Unit

T

V

T

V

INH

I

O

P

STG

OP

I

D

DC input voltage -0.3 to 16 V

INHIBIT input voltage -0.3 to 16 V

Output current Internally limited

Power dissipation Internally limited

Storage temperature range -55 to 150 °C

Operating junction temperature range -40 to 125 °C

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these condition is not implied.

5/23

Typical application LD2981ABxx - LD2981Cxx

4 Typical application

Figure 3. Application circuit

Note: Inhibit pin is not internally pulled-up then it must not be left floating. Disable the device when

connected to GND or to a positive voltage less than 0.18 V.

6/23

LD2981ABxx - LD2981Cxx Electrical characteristics

5 Electrical characteristics

Table 5. Electrical characteristics for LD2981AB (TJ = 25 °C, VI = V

C

= 2.2 µF (X7R), IO = 1 mA, V

O

= 2 V, unless otherwise specified).

INH

O(NOM)

+1 V, CI = 1 µF (X7R),

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

ΔV

Operating input voltage 2.5 16 V

OP

I

= 1 mA 2.481 2.5 2.518

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

O

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Line regulation

= 1 to 100 mA 2.475 2.525

O

= 1 to 100 mA, TJ= -40 to 125°C 2.437 2.562

I

O

I

= 1 mA 2.828 2.85 2.872

O

= 1 to 100 mA 2.822 2.878

O

= 1 to 100 mA, TJ= -40 to 125°C 2.779 2.921

I

O

I

= 1 mA 2.977 3 3.023

O

= 1 to 100 mA 2.970 3.030

O

= 1 to 100 mA, TJ= -40 to 125°C 2.925 3.075

I

O

I

= 1 mA 3.176 3.2 3.224

O

= 1 to 100 mA 3.168 3.232

O

= 1 to 100 mA, TJ= -40 to 125°C 3.12 3.28

I

O

I

= 1 mA 3.275 3.3 3.325

O

= 1 to 100 mA 3.267 3.333

O

= 1 to 100 mA, TJ= -40 to 125°C 3.217 3.383

I

O

I

= 1 mA 3.573 3.6 3.627

O

= 1 to 100 mA 3.564 3.636

O

= 1 to 100 mA, TJ= -40 to 125°C 3.510 3.690

I

O

I

= 1 mA 3.771 3.8 3.829

O

= 1 to 100 mA 3.762 3.838

O

= 1 to 100 mA, TJ= -40 to 125°C 3.705 3.895

I

O

I

= 1 mA 3.97 4 4.03

O

= 1 to 100 mA 3.96 4.04

O

= 1 to 100 mA, TJ= -40 to 125°C 3.9 4.1

I

O

I

= 1 mA 4.664 4.7 4.735

O

= 1 to 100 mA 4.653 4.747

O

= 1 to 100 mA, TJ= -40 to 125°C 4.582 4.817

I

O

I

= 1 mA 4.813 4.85 4.887

O

= 1 to 100 mA 4.801 4.899

O

= 1 to 100 mA, TJ= -40 to 125°C 4.729 4.971

I

O

I

= 1 mA 4.962 5 5.038

O

= 1 to 100 mA 4.950 5.050

O

= 1 to 100 mA, TJ= -40 to 125°C 4.875 5.125

I

O

V

T

+ 1 < VIN < 16 V, IO = 1 mA 0.003 0.014

O(NOM)

= -40 to 125°C 0.032

J

%/V

VI

VI

VI

VI

VI

VI

VI

VI

VI

VI

VI

7/23

Electrical characteristics LD2981ABxx - LD2981Cxx

Table 5. Electrical characteristics for LD2981AB (continued) (TJ = 25 °C, VI = V

1 µF (X7R), C

= 2.2 µF (X7R), IO = 1 mA, V

O

= 2 V, unless otherwise specified).

INH

O(NOM)

+1 V, CI =

Symbol Parameter Test conditions Min. Typ. Max. Unit

I

= 0 80 100

O

= 0, TJ= -40 to 125°C 150

I

O

= 1 mA 100 150

I

O

= 1 mA, TJ= -40 to 125°C 200

Quiescent current
ON MODE

I

Q

OFF MODE

I

O

= 25 mA 250 400

I

O

= 25 mA, TJ= -40 to 125°C 800

I

O

= 100 mA 1000 1300

I

O

= 100 mA, TJ= -40 to 125°C 2600

I

O

< 0.3 V 0.8

V

INH

< 0.15 V, TJ= -40 to 125°C 2

V

INH

IO = 0 1 3

I

= 0, TJ= -40 to 125°C 5

O

= 1mA 7 10

I

O

= 1mA, TJ= -40 to 125°C 15

I

V

DROP

Dropout voltage

Short circuit current RL = 0 150 mA

I

SC

(1)

SVR Supply voltage rejection C

V

V

I

T

SHDN

1. For VO < 2.5 V dropout voltage can be calculated according to the minimum input voltage in full temperature range.

Inhibit input logic low LOW = Output OFF, TJ= -40 to 125°C 0.18 V

INH

Inhibit input logic high HIGH = Output ON, TJ= -40 to 125°C 1.6 V

INL

Inhibit input current

INH

Output noise voltage BW = 300 Hz to 50 KHz, CO = 10µF 160 µV

e

N

Thermal shutdown 170 °C

O

= 25mA 70 100

I

O

= 25mA, TJ= -40 to 125°C 150

I

O

= 100mA 180 250

I

O

= 100mA, TJ= -40 to 125°C 375

I

O

= 10µF, f = 1KHz 63 dB

O

= 0V, TJ= -40 to 125°C 0 -1

V

INH

V

= 5V, TJ= -40 to 125°C 5 15

INH

mV

µA

µA

RMS

8/23

LD2981ABxx - LD2981Cxx Electrical characteristics

Table 6. Electrical characteristics for LD2981C (TJ = 25 °C, VI = V

C

= 2.2 µF (X7R), IO = 1 mA, V

O

= 2 V, unless otherwise specified)

INH

O(NOM)

+1 V, CI = 1 µF (X7R),

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

Operating input voltage 2.5 16 V

OP

I

= 1 mA 1.478 1.5 1.522

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

V

O

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

Output voltage

= 1 to 100 mA 1.470 1.530

O

= 1 to 100 mA, TJ= -40 to 125°C 1.445 1.555

I

O

I

= 1 mA 1.777 1.8 1.822

O

= 1 to 100 mA 1.764 1.836

O

= 1 to 100 mA, TJ= -40 to 125°C 1.737 1.863

I

O

I

= 1 mA 2.468 2.5 2.531

O

= 1 to 100 mA 2.45 2.55

O

= 1 to 100 mA, TJ= -40 to 125°C 2.412 2.587

I

O

I

= 1 mA 2.814 2.85 2.885

O

= 1 to 100 mA 2.793 2.907

O

= 1 to 100 mA, TJ= -40 to 125°C 2.75 2.949

I

O

I

= 1 mA 2.962 3 3.037

O

= 1 to 100 mA 2.94 3.06

O

= 1 to 100 mA, TJ= -40 to 125°C 2.895 3.105

I

O

I

= 1 mA 3.16 3.2 3.24

O

= 1 to 100 mA 3.136 3.264

O

= 1 to 100 mA, TJ= -40 to 125°C 3.088 3.312

I

O

I

= 1 mA 3.258 3.3 3.341

O

= 1 to 100 mA 3.234 3.366

O

= 1 to 100 mA, TJ= -40 to 125°C 3.184 3.415

I

O

I

= 1 mA 3.555 3.6 3.645

O

= 1 to 100 mA 3.528 3.672

O

= 1 to 100 mA, TJ= -40 to 125°C 3.474 3.726

I

O

I

= 1 mA 3.752 3.8 3.847

O

= 1 to 100 mA 3.724 3.876

O

= 1 to 100 mA, TJ= -40 to 125°C 3.667 3.933

I

O

I

= 1 mA 3.95 4 4.05

O

= 1 to 100 mA 3.92 4.08

O

= 1 to 100 mA, TJ= -40 to 125°C 3.86 4.14

I

O

I

= 1 mA 4.641 4.7 4.758

O

= 1 to 100 mA 4.606 4.794

O

= 1 to 100 mA, TJ= -40 to 125°C 4.535 4.864

I

O

I

= 1 mA 4.789 4.85 4.91

O

= 1 to 100 mA 4.753 4.947

O

= 1 to 100 mA, TJ= -40 to 125°C 4.68 5.019

I

O

VI

VI

VI

VI

VI

VI

VI

VI

VI

VI

VI

VI

9/23

Electrical characteristics LD2981ABxx - LD2981Cxx

Table 6. Electrical characteristics for LD2981C (continued) (TJ = 25 °C, VI = V

µF (X7R), C

= 2.2 µF (X7R), IO = 1 mA, V

O

= 2 V, unless otherwise specified)

INH

O(NOM)

+1 V, CI = 1

Symbol Parameter Test conditions Min. Typ. Max. Unit

I

= 1 mA 4.937 5 5.062

O

V

ΔV

Output voltage

O

Line regulation

O

Quiescent current
ON MODE

I

Q

OFF MODE

= 1 to 100 mA 4.9 5.1

O

= 1 to 100 mA, TJ= -40 to 125°C 4.825 5.175

I

O

V

T

I

I

I

I

I

I

I

I

V

V

O

O

O

O

O

O

O

O

+ 1 < VIN < 16 V, IO = 1 mA 0.003 0.014

O(NOM)

= -40 to 125°C 0.032

J

= 0 80 100

= 0, TJ= -40 to 125°C 150

= 1 mA 100 150

= 1 mA, TJ= -40 to 125°C 200

= 25 mA 250 400

= 25 mA, TJ= -40 to 125°C 800

= 100 mA 1000 1300

= 100 mA, TJ= -40 to 125°C 2600

< 0.3 V 0.8

INH

< 0.15 V, TJ= -40 to 125°C 2

INH

%/V

IO = 0 1 3

I

= 0, TJ= -40 to 125°C 5

O

= 1 mA 7 10

I

O

= 1 mA, TJ= -40 to 125°C 15

I

V

DROP

Dropout voltage

Short circuit current RL = 0 150 mA

I

SC

(1)

SVR Supply voltage rejection C

V

V

I

T

SHDN

1. For VO < 2.5 V dropout voltage can be calculated according to the minimum input voltage in full temperature range.

Inhibit input logic low LOW = Output OFF, TJ= -40 to 125°C 0.18 V

INH

Inhibit input logic high HIGH = Output ON, TJ= -40 to 125°C 1.6 V

INL

Inhibit input current

INH

Output noise voltage BW = 300 Hz to 50 KHz, CO = 10µF 160 µV

e

N

Thermal shutdown 170 °C

O

= 25 mA 70 100

I

O

= 25 mA, TJ= -40 to 125°C 150

I

O

= 100 mA 180 250

I

O

= 100 mA, TJ= -40 to 125°C 375

I

O

= 10µF, f = 1KHz 63 dB

O

V

= 0V, TJ= -40 to 125°C 0 -1

INH

V

= 5V, TJ= -40 to 125°C 5 15

INH

mV

VI

µA

µF

RMS

10/23

LD2981ABxx - LD2981Cxx Typical performance characteristics

6 Typical performance characteristics

(TJ = 25 °C, VI = V

O(NOM)

+1 V, CI = 1 µF (X7R), CO = 2.2 µF (X7R), V

= 2 V, unless

INH

otherwise specified).

Figure 4. Output voltage vs temperature Figure 5. Dropout voltage vs temperature

Figure 6. Line regulation vs temperature Figure 7. Load regulation vs temperature

Figure 8. Dropout voltage vs temperature Figure 9. Quiescent current vs temperature

11/23

Typical performance characteristics LD2981ABxx - LD2981Cxx

Figure 10. Quiescent current vs output

Figure 12. Quiescent current vs input voltage Figure 13. Dropout voltage vs output current

current

Figure 11. Off mode quiescent current vs

temperature

Figure 14. Inhibit input current vs temperature Figure 15. Inhibit voltage vs temperature

12/23

LD2981ABxx - LD2981Cxx Typical performance characteristics

Figure 16. Supply voltage rejection vs

Figure 18. Best case: highest output version Figure 19. Worst case: lowest output version

frequency

Figure 17. Noise voltage vs frequency

Figure 20. Load transient response Figure 21. Line transient response

VO = 4.7V, IO = 1 to 100mA, CO = 4.7µF (X7R)

VI = [V

(X7R)

+1V], VO = 4.7V, IO = 100mA, CO = 4.7µF

O(NOM)

13/23

Application notes LD2981ABxx - LD2981Cxx

7 Application notes

7.1 External capacitors

Like any low-dropout regulator, the LD2981 requires external capacitors for regulator
stability. This capacitor must be selected to meet the requirements of minimum capacitance
and equivalent series resistance. We suggest to solder input and output capacitors as close
as possible to the relative pins.

7.2 Input capacitor

An input capacitor whose value is 1 µF is required with the LD2981 (amount of capacitance
can be increased without limit). This capacitor must be located a distance of not more than

0.5" from the input pin of the device and returned to a clean analog ground. Any good quality
ceramic, tantalum or film capacitors can be used for this capacitor.

7.3 Output capacitor

The LD2981 is designed specifically to work with ceramic output capacitors. It may also be
possible to use Tantalum capacitors, but these are not as attractive for reasons of size and
cost. By the way, the output capacitor must meet both the requirement for minimum amount
of capacitance and ESR (equivalent series resistance) value. The Figure 3 and Figure 4
show the allowable ESR range as a function of the output capacitance. These curves
represent the stability region over the full temperature and I
gain, the stability improves for higher output versions and so the suggested minimum output
capacitor value, if low ESR ceramic type is used, is 1 µF for output voltages equal or major
than 3.8 V, 2.2 µF for output voltages from 2.85 to 3.3 V, and 3.3 µF for the other versions.
However, if an output capacitor lower than the suggested one is used, it’s possible to make
stable the regulator adding a resistor in series to the capacitor (see Figure 1 and Figure 2 to
choose the right value according to the used version and keeping in account that the ESR of
ceramic capacitors has been measured @ 100 kHz).

range. Due to the different loop

O

7.4 Important

The output capacitor must maintain its ESR in the stable region over the full operating
temperature to assure stability. Also, capacitor tolerance and variation with temperature
must be considered to assure the minimum amount of capacitance is provided at all times.
This capacitor should be located not more than 0.5" from the output pin of the device and
returned to a clean analog ground.

7.5 Inhibit input operation

The inhibit pin can be used to turn OFF the regulator when pulled low, so drastically
reducing the current consumption down to less than 1 µA. When the inhibit feature is not

14/23

used, this pin must be tied to V
proper operation, the signal source used to drive the inhibit pin must be able to swing above
and below the specified thresholds listed in the electrical characteristics section under V
V

. Any slew rate can be used to drive the inhibit.

IL

to keep the regulator output ON at all times. To assure

I

IH

LD2981ABxx - LD2981Cxx Application notes

7.6 Reverse current

The power transistor used in the LD2981 has not an inherent diode connected between the
regulator input and output. If the output is forced above the input, no current will flow from
the output to the input across the series pass transistor. When a V
the output, the reverse current measured, according to the test circuit in Figure 22, flows to
the GND across the two feedback resistors. This current typical value is 160 µA. R
resistors are implanted type; typical values are, respectively, 42.6 kΩ and 51.150 kΩ.

Figure 22. Reverse current test circuit

voltage is applied on

REV

1

and R2

15/23

Package mechanical data LD2981ABxx - LD2981Cxx

8 Package mechanical data

In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.

16/23

LD2981ABxx - LD2981Cxx Package mechanical data

SOT-89 mechanical data

mm. mils.

Dim.

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

A 1.4 1.6 55.1 63.0

B 0.44 0.56 17.3 22.0

B1 0.36 0.48 14.2 18.9

C0.35 0.44 13.8 17.3

C1 0.35 0.44 13.8 17.3

D 4.4 4.6 173.2 181.1

D1 1.62 1.83 63.8 72.0

E2.29 2.6 90.2 102.4

e 1.42 1.57 55.9 61.8

e1 2.92 3.07 115.0 120.9

H 3.94 4.25 155.1 167.3

L0.89 1.2 35.0 47.2

P025H

17/23

Package mechanical data LD2981ABxx - LD2981Cxx

SOT23-5L mechanical data

mm. mils.

Dim.

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

A0.90 1.45 35.4 57.1

A1 0.00 0.10 0.0 3.9

A2 0.901.30 35.4 51.2

b 0.35 0.50 13.7 19.7

C0.09 0.20 3.5 7.8

D2.80 3.00 110.2 118.1

E 1.50 1.75 59.0 68.8

e0.95 37.4

H 2.60 3.00 102.3 118.1

L 0.10 0.60 3.9 23.6

18/23

7049676D

LD2981ABxx - LD2981Cxx Package mechanical data

Tape & reel SOT23-xL mechanical data

Dim.

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

A180 7.086

C 12.8 13.0 13.2 0.504 0.512 0.519

D 20.2 0.795

N60 2.362

T 14.4 0.567

Ao 3.133.233.33 0.123 0.127 0.131

Bo 3.07 3.17 3.27 0.120 0.124 0.128

Ko 1.27 1.37 1.47 0.050 0.054 0.0.58

Po 3.9 4.0 4.1 0.153 0.157 0.161

P 3.9 4.0 4.1 0.153 0.157 0.161

mm. inch.

19/23

Package mechanical data LD2981ABxx - LD2981Cxx

Tape & reel SOT-89 mechanical data

Dim.

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

A180 7.086

C 12.8 13.0 13.2 0.504 0.512 0.519

D 20.2 0.795

N60 2.362

T 14.4 0.567

Ao 4.70 4.804.90 0.185 0.189 0.193

Bo 4.30 4.40 4.50 0.169 0.173 0.177

Ko 1.70 1.801.90 0.067 0.071 0.075

Po 3.9 4.0 4.1 0.153 0.157 0.161

P7.98.0 8.1 0.311 0.315 0.319

mm. inch.

20/23

LD2981ABxx - LD2981Cxx Order codes

9 Order codes

Table 7. Order codes

AB Version C Version

Output voltage

SOT23-5L SOT-89 SOT23-5L SOT-89

LD2981ABM25TR LD2981ABU25TR

LD2981ABM30TR LD2981ABU30TR

LD2981ABM33TR LD2981ABU33TR LD2981CM33TR LD2981CU33TR 3.3 V

LD2981ABM50TR LD2981ABU50TR LD2981CM50TR LD2981CU50TR 5.0 V

1. Available on request.

(1)

(1)

LD2981CM30TR LD2981CU30TR

LD2981CU25TR

(1)

(1)

2.5 V

3.0 V

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Revision history LD2981ABxx - LD2981Cxx

10 Revision history

Table 8. Document revision history

Date Revision Changes

25-Jul-2006 12 Order codes updated.

14-Feb-2008 13 Added: Table 1 on page 1.

14-Jul-2008 14 Modified: Table 1 on page 1 and Table 7 on page 21.

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LD2981ABxx - LD2981Cxx

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