Electrical characteristics

SEA05

4/10

Doc ID 17014 Rev 1

4

Electrical characteristics

Table 5.

Electrical characteristics

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Device supply

Vcc

Voltage operating range

3.5

36

V

Icc

Quiescent current (Ictrl =I

sense = 0 V, OUT = open)

200

300

µA

Voltage control loop op-amp

Transconductance

1.

If the voltage on Vctrl (the negative input of the amplifier) is higher than the positive amplifier input, and it is

increased by 1 mV, the sinking current at the output OUT is increased by 3.5 mA.

13.5

S

Voltage reference default

2.

The internal voltage reference is set at 2.5 V. The voltage control loop precision takes into account the

cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the

transconductance operational amplifier. The internal Voltage Reference is fixed by bandgap, and trimmed

to 0.48 % accuracy at room temperature.

2.488

2.5

2.512

V

2.48

2.52

Ibias

Inverting input bias current

25

nA

Current control loop

Transconductance

3.

When the positive input at Ictrl is lower than -50 mV, and the voltage is decreased by 1 mV, the sinking

current at the output out is increased by 7 mA.

1.5

7

S

Current sense threshold

4.

Considering Ictrl pin directly connected to the hot (negative) end of the current sense resistor and Isense

pin connected to the cold end of the current sense resistor through a decoupling resistor (see fig.3), the

internal current sense threshold is triggered when the voltage on pin Ictrl is -50 mV. The current loop

reference precision takes into account the cumulative effects of the internal voltage reference deviation as

well as the input offset voltage of the transconductance operational amplifier.

46

50

54

mV

Ibias

Non-inverting input source

current @ V(Ictrl) = -50 mV

6µA

Output stage

Low output level @ 2 mA

sink current

200

400

mV