L387A datasheet(3/6 Pages) STMICROELECTRONICS

Part #	L387A

Description	VERY LOW DROP 5V REGULATOR WITH RESET

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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ELECTRICAL CHARACTERISTICS (refer to the test circuit, Vi = 14.4 V, Tj = 25

°C, Co = 100 µF;

unless otherwise specified)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Vo

Output Voltage

Io = 5 mA to 500 mA Tj = 25

°C

– 40

≤ Tj ≤ 125 °C

4.80

4.75

5.00

5.20

5.25

V

VI

Operating Input Voltage

(*), Over Full T Range (– 40 to 125

°C)

(see note **)

26

V

∆Vo

Line Regulation

Vi = 6 V to 26 V

Io = 5 mA

5

50

mV

∆Vo

Load Regulation

Io = 5 mA to 500 mA

15

60

mV

VI – Vo

Dropout Voltage

VO = V O NOM – 100 mV

Io = 350 mA

Io = 500 mA

0.40

0.60

0.65

0.8

V

Iq

Quiescent Current

Io = 0 mA

Io = 150 mA

Io = 350 mA

Io = 500 mA

5

20

60

100

15

35

100

160

mA

Vi = 6.2 V

Io = 500 mA

160

180

mA

∆ Vo

∆ T

Temperature Output

Voltage Drift

– 0.5

mV/

°C

SVR

Supply Voltage Rejection

Io = 350 mA

f = 120 Hz

Co = 100

µF

Vi = 12 V

± 5 Vpp

60

ISC

Output Short Circuit

Current

1.2

1.6

A

VR

Reset Output Voltage

IR = 3 mA

1 < Vo < 4.70 V

IR = 16 mA

1.5 < Vo < 4.75 V

Over Full T (– 40

°C ≤ Tj ≤ 125 °C)

0.5

0.8

V

IR

Reset Output Leakage

Current

Vo in Regulation VR = 5V

Over Full T Range

50

µA

td

Delay Time for Reset

Output

Cd = 100 nF

Over Full T Range

25

ms

VRT (off)

Vo @ Reset out H to L Transition, Over

Full T Range

4.75

Vo

– 0.15

V

IC4

Charging Current

(current generator)

V4 = 3 V

10

20

30

µA

VRT (on)

Power on

VoThreshold

Vo @ Reset out L to H Transition , Over

Full T Range

VRT (off)

+ 0.05 V

Vo

– 0.04 V

V

V4

Comparator Threshold

(pin 4)

V4 @ Reset out H to L Transition

3.2

3.9

V

V4 @ Reset out L to H Transition

3.7

4.3

V

VH

Hysteresis Voltage

Over Full T Range

450

mV

(*)

For a DC voltage 26 < Vi < 37 V the device is not operating.

(**) Design limits are guaranteed (but not 100 % production tested) over the indicated temperature and supply voltage ranges.

These limits are not used to calculate outgoing quality levels.

L387A

3/6

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