LEO3910 datasheet(6/21 Pages) STMICROELECTRONICS

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Electrical characteristics

VI = VO + 2.5 V, Tj = +25 °C, CI = 10 µF, CO = 10 µF tantalum, unless otherwise specified.

Table 4. Electrical characteristics

Symbol

Parameter

Test conditions

Min. Typ. Max.

Unit

Input voltage

IO = 1 A, TJ= -40 to 125 °C

VADJ

Reference voltage

IO = 5 mA, VO = VADJ,TJ= -40 to 125 °C

1.19 1.23 1.27

∆VO/∆Vi

Line regulation

VI = VO+2.5 V to 12 V, IO = 5 mA

0.07

∆VO/∆IO

Load regulation

VI = VO+2.5 V, IO = 5 mA to 1 A

0.4

ISHORT

Output current limit(1)

Adjustable by external resistor

3.8

Dropout voltage

IO = 400 mA, Vout = 3 V, TJ = -40 to 125 °C

0.35

0.7

IO = 1 A, Vout = 3 V, TJ= -40 to 125 °C

0.5

IO = 2 A, Vout = 3 V, TJ = -40 to 125 °C

0.75

1.5

Quiescent current

VI = VO+2.5 V to 12 V,

IO = 5 mA, on mode

1.6

VI = VO+2.5 V to 12 V,

IO = 30 mA, on mode

2.7

VI = VO+2.5 V to 12 V,

IO = 300 mA, on mode

VI = VO+2.5 V to 12 V,

IO = 1 A, on mode

VI = 12 V VINH = 3 V, off mode

0.3

SVR

Supply voltage rejection(1)

VI = VO+2.5 V ± 1 V,

IO = 5 mA,

VO=3 V, f = 33 kHz

VINH (OFF)

Inhibit turn-off voltage

IO = 5 mA, TJ = -40 to 125 °C

2.4

VINH (ON)

Inhibit turn-on voltage

IO = 5 mA, TJ= -40 to 125 °C

0.8

IINH

Shutdown input current

VINH = 5 V

120

µA

VOCML

Overcurrent monitor voltage low

IOCM = 10 mA (sunk current), VI = 12 V

0.4

VOCMH

Overcurrent monitor voltage high

IOCM = -10 µA (sourced current)

VI = VO+2.5 V to 12 V

Output noise voltage(1)

B= 10 Hz to 100 kHz

IO = 5 mA to 2 A

µVrms/V

1. These values are guaranteed by design.

LEO3910

Electrical characteristics

DS13691 - Rev 2

page 6/21

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