STEF033 datasheet(7/25 Pages) STMICROELECTRONICS

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STEF033

Electrical Characteristics

VCC = 3.3 V, CI = 10 µF, CO =10 µF, TJ = 25°C (unless otherwise specified)

Table 6. Electrical characteristics for STEF033

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Under/Over Voltage Protection

VClamp

Output clamping voltage

VCC = 8 V

4.5

VUVLO

Under voltage Lockout

Turn-on, voltage increasing

2.15

2.35

2.5

VHyst

UVLO hysteresis

0.1

Power MOSFET

tdly

Delay time

Enabling of chip to VOUT=10%

of nominal value.

500

µs

RDSon

ON resistance (DFN package)(1)

IOUT = 500 mA, TJ = 25°C

IOUT = 500 mA,

-40°C<TJ<125°C

ON resistance

(Flip Chip package)(1)

IOUT = 500 mA, TJ = 25°C

IOUT = 500 mA,

-40°C<TJ<125°C

VOFF

Off State output voltage

VEN=GND, RL=infinite

100

Continuous current

DFN package

3.6

Flip Chip package

2.5

Current limit

IShort

Short-circuit current limit

RLimit = 24 Ω

11.35

1.75

ILim

Overload current limit

RLimit = 24 Ω

(2)

2.5

dv/dt circuit

dv/dt

Output voltage ramp time

VOUT = 10% to 90% of nominal

voltage, No Cdv/dt

0.8

1.4

2.5

Enable/Fault

VIL

Low level input voltage

Output disabled, (2)

0.5

VI(INT)

Intermediate level input voltage

Thermal fault, output disabled (2)

0.8

1.4

VIH

High level input voltage

Output enabled

2.5

VI(MAX)

High state maximum voltage

3.25

IIL

Low level input current (sink)

VEnable = GND

-28

-50

µA

Maximum fan-out for fault signal

Total number of chips that can

be connected to this pin for

simultaneous shutdown (2)

3Units

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