STEF4S datasheet(6/22 Pages) STMICROELECTRONICS

6 / 22 page

Electrical characteristics

STEF4S

6/22

DocID025259 Rev 2

Electrical characteristics

Unless otherwise specified, typical values are referred to VIN = 5 V for VCP = VIN and

VIN = 3.3 V for VCP = GND,CIN = COUT = 22 µF, T = 25 ºC, min. and max. values are referred

to T = - 40 ºC to 85 ºC.

Table 5. STEF4S electrical characteristic

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VIN

Operating input voltage

Under/overvoltage protection, 3.3 V mode

VClamp

Output clamping voltage

VIN = 10 V, VCP = GND

3.6

3.8

4.0

VUVLO

Under voltage lockout

VCP = GND,

Turn-on, voltage going up

2.2

2.3

2.4

VHyst

UVLO hysteresis

VCP = GND

130

Under/overvoltage protection, 5 V mode

VClamp

Output clamping voltage

VIN = 10 V, VCP = VIN

5.4

5.7

6.0

VUVLO

Under voltage lockout

VCP = VIN,

Turn-on, voltage going up

3.4

3.6

3.8

VHyst

UVLO hysteresis

VCP = VIN

105

150

Power MOSFET

RDS(on)

ON-resistance

RDS(on) = (VIN-VOUT)/IOUT

Tj = 85 °C

(1)

Current limit

IOL

Protection trip current

ILim

Overload current limit

IShort

Short-circuit current limit

VOUT = 0 V

Soft-start circuit

Tss

Output voltage ramp time

From VIN= VUVLO to VOUT = 90 %,

no CSS

0.6

From VIN = VUVLO to VOUT = 90 %,

CSS = 100 nF

Enable pin thresholds

VEN-L

Enable pin switch-off voltage

Output disabled

0.4

VEN-H

Enable pin switch-on voltage

Output enabled

VCP pin thresholds

VCP-L

3.3 V mode selection threshold

3.3 V mode enabled

0.4

VCP-H

5 V mode selection threshold

5 V mode enabled

Total device

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