L4995AJ-L4995AK datasheet, PDF

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L4995AJ-L4995AK: Description5V, 500mA low drop voltage regulator; File Size1MB，36 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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L4995AJ-L4995AK Overview

5V, 500mA low drop voltage regulator

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L4995

Automotive 5V, 500mA low drop voltage regulator

Datasheet

production data



Wide temperature range (Tj = -40 °C to 150 °C)



Enable input for enabling/disabling the voltage

regulator

P w rS O 2

o e S -1

P w rS O 4

o e S -2

Description

L4995 is a family of monolithic integrated 5 V

voltage regulators with a low drop voltage at

currents of up to 500 mA, available in both 12 and

24 pin packages.

The output voltage regulating element consists of

a p-channel MOS and regulation is performed

regardless of input voltage transients of up to 40V.

The high precision of the output voltage is

obtained using a pre-trimmed reference voltage.

The L4995 family is protected against short circuit

and overtemperature protection switches off the

devices in the case of extremely high power

dissipation. The L4995 integrates the watchdog,

enable and externally programmable reset

circuits. The L4995A features the externally

programmable reset and enable. Finally the

L4995R features the externally programmable

reset.

The combination of such features makes this

device particularly flexible and suitable to supply

microprocessor systems in automotive

applications.

Features

Max DC supply voltage

Max output voltage tolerance

Max dropout voltage

Output current

Quiescent current

1. Typical value with regulator disabled

V

40V

+/-2%

500mV

500mA

3µA

(1)



AEC-Q100 qualified



Operating DC supply voltage

range 5.6 V to 31 V



Low dropout voltage



Low quiescent current consumption



Reset circuit sensing of output voltage down to



Programmable reset pulse delay with external

capacitor



Programmable watchdog timer with external

capacitor



Thermal shutdown and short circuit protection

Table 1. Device summary

Package

PowerSSO-12 (exposed pad)

PowerSSO-24 (exposed pad)

P/N

L4995J - L4995K

L4995AJ - L4995AK

L4995RJ - L4995RK

Order codes

Tube

L4995J - L4995AJ - L4995RJ

L4995K - L4995AK - L4995RK

Watchdog

Reset

Tape and reel

L4995JTR - L4995AJTR - L4995RJTR

L4995KTR - L4995AKTR - L4995RKTR

Enable

September 2018

This is information on a product in full production.

DS5053 Rev 15

1/37

www.st.com

Contents

L4995

Contents

Block diagrams and pins descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1

2.2

2.3

2.4

2.5

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Test circuit and waveforms plot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.5.1

Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.1

3.2

3.3

Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Package and PCB thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.1

4.2

PowerSSO-12 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

PowerSSO-24 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5.1

5.2

5.3

5.4

ECOPACK

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

PowerSSO-24 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

PowerSSO-12 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

PowerSSO-24 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2/37

DS5053 Rev 15

List of figures

L4995

List of figures

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Figure 16.

Figure 17.

Figure 18.

Figure 19.

Figure 20.

Figure 21.

Figure 22.

Figure 23.

Figure 24.

Figure 25.

Figure 26.

Figure 27.

Figure 28.

Figure 29.

Figure 30.

Figure 31.

Figure 32.

Figure 33.

Figure 34.

Figure 35.

Figure 36.

Figure 37.

Figure 38.

Figure 39.

Figure 40.

Figure 41.

Figure 42.

Figure 43.

Figure 44.

Block diagram of L4995 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Block diagram of L4995A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Block diagram of L4995R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Pins configurations (L4995) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Output voltage vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Output voltage vs V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Drop voltage vs output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Current consumption vs output current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Current consumption vs input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Current limitation vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Current limitation vs input voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Short circuit current vs input voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Output voltage vs enable voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

En_high

vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

EN_LOW

vsT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Rhth

vsT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Rlth

vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

whth

vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

wlth

vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

and I

cwc

vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

and I

cwd

vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

wop

vs T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

PSRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Load regulation test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Maximum load variation response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

L4995 application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Stability region . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Behavior of output current versus regulated voltage V

. . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Reset timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Watchdog timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

PowerSSO-12 PC board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Rthj-amb vs PCB copper area in open box free air condition . . . . . . . . . . . . . . . . . . . . . . 22

PowerSSO-12 thermal impedance junction ambient single pulse . . . . . . . . . . . . . . . . . . . 23

Thermal fitting model of Vreg in PowerSSO-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

PowerSSO-24 PC board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Rthj-amb vs PCB copper area in open box free air condition . . . . . . . . . . . . . . . . . . . . . . 25

PowerSSO-24 thermal impedance junction ambient single pulse . . . . . . . . . . . . . . . . . . . 26

Thermal fitting model of V

reg

in PowerSSO-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

PowerSSO-12 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

PowerSSO-24 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

PowerSSO-12 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

PowerSSO-12 tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

PowerSS0-24 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

PowerSSO-24 tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4/37

DS5053 Rev 15

L4995AJ-L4995AK Related Products

	L4995AJ-L4995AK	L4995J-L4995K	L4995RJ-L4995RK
Description	5V, 500mA low drop voltage regulator	5V, 500mA low drop voltage regulator	5V, 500mA low drop voltage regulator

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Shortcut: 00 01 02 03 04 05 06 07 08 09 0A 0C 0F 0J 0L 0M 0R 0S 0T 0Z 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 1H 1K 1M 1N 1P 1S 1T 1V 1X 1Z 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 2G 2K 2M 2N 2P 2Q 2R 2S 2T 2W 2Z 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 3G 3H 3J 3K 3L 3M 3N 3P 3R 3S 3T 3V 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4M 4N 4P 4S 4T 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5E 5G 5H 5K 5M 5N 5P 5S 5T 5V 60 61 62 63 64 65 66 67 68 69 6A 6C 6E 6F 6M 6N 6P 6R 6S 6T 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7M 7N 7P 7Q 7V 7W 7X 80 81 82 83 84 85 86 87 88 89 8A 8D 8E 8L 8N 8P 8S 8T 8W 8Y 8Z 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9F 9G 9H 9L 9S 9T 9W

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