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STMicroelectronics Electronic Components Datasheet

L4995 Datasheet

500mA low drop voltage regulator

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L4995 pdf
L4995
5V, 500mA low drop voltage regulator
Features
Datasheet production data
Max DC supply voltage
Max output voltage tolerance
Max dropout voltage
Output current
Quiescent current
VS
ΔV0
Vdp
I0
Iqn
1. Typical value with regulator disabled
40V
+/-2%
500mV
500mA
3µA(1)
Operating DC supply voltage range 5.6V to
31V
Low dropout voltage
Low quiescent current consumption
Reset circuit sensing of output voltage down to
1V
Programmable reset pulse delay with external
capacitor
Programmable watchdog(a) timer with external
capacitor
Thermal shutdown and short circuit protection
Wide temperature range (Tj = -40 °C to 150 °C)
Enable(a) input for enabling/disabling the
voltage regulator
a. Watchdog and Enable facilities are available
according to Device summary table.
PowerSSO-12
PowerSSO-24
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.
Table 1. Device summary
Package
Tube
Order codes
Tape and reel
PowerSSO-12 (exposed pad)
L4995J - L4995AJ - L4995RJ
L4995JTR - L4995AJTR - L4995RJTR
PowerSSO-24 (exposed pad)
L4995K - L4995AK - L4995RK
L4995KTR - L4995AKTR - L4995RKTR
P/N
Watchdog
Reset
Enable
L4995J - L4995K
X
X
X
L4995AJ - L4995AK
-
X
X
L4995RJ - L4995RK
-
X
-
October 2012
This is information on a product in full production.
Doc ID 13103 Rev 13
1/35
www.st.com
1
Free Datasheet http://www.datasheet4u.com/


STMicroelectronics Electronic Components Datasheet

L4995 Datasheet

500mA low drop voltage regulator

No Preview Available !

L4995 pdf
Contents
Contents
L4995
1 Block diagrams and pins descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.5 Test circuit and waveforms plot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.5.1 Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3 Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4 Package and PCB thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1 PowerSSO-12 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2 PowerSSO-24 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5 Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.1 ECOPACK® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2 PowerSSO-24 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.3 PowerSSO-12 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.4 PowerSSO-24 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2/35
Doc ID 13103 Rev 13
Free Datasheet http://www.datasheet4u.com/


Part Number L4995
Description 500mA low drop voltage regulator
Maker STMicroelectronics
Total Page 30 Pages
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