Datasheet

Data Sheet 8 Rev. 1.1, 2011-07-08
IFX91041
Buck Regulator
5.2 Electrical Characteristics
Electrical Characteristics: Buck Regulator
V
S
= 6.0 V to 40 V, T
j
= -40 °C to +125°C, all voltages with respect to ground (unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
5.2.1 Output voltage
V
FB
4.90 5.00 5.10 V
IFX91041EJV50
;
V
VEN
= V
S
0.1A < I
CC
< 1.0A
5.2.2
V
FB
4.80 5.00 5.20 V IFX91041EJV50;
V
VEN
= V
S
;
1mA < I
CC
< 1.8A
5.2.3 Output voltage
V
FB
3.23 3.30 3.37 V
IFX91041EJV33
;
V
VEN
= V
S
;
0.1A < I
CC
< 1.0A
5.2.4
V
FB
3.17 3.30 3.43 V
IFX91041EJV33
;
V
VEN
= V
S
;
1mA < I
CC
< 1.8A
5.2.5 Output voltage
V
FB
0.588 0.60 0.612 V
IFX91041EJV
;
V
VEN
= V
S
;
FB connected to
V
CC
;
V
S
= 12V
0.1A <
I
CC
< 1.0A
5.2.6
V
FB
0.576 0.60 0.624 V
IFX91041EJV
;
V
VEN
= V
S
;
FB connected to
V
CC
;
V
S
= 12V
1mA <
I
CC
< 1.8A
5.2.7 Minimum output load requirement
I
CC,MIN
0 – – mA IFX91041EJV50
1)
5.2.8 1 – – mA
IFX91041EJV33
1)
5.2.9 1.5 mA IFX91041EJV
V
CC
?> 3V
1)
5.2.10 5 mA IFX91041EJV
V
CC
?> 1.5V
1)
5.2.11 10 – – mA IFX91041EJV
V
CC
?> =0.6V
1)
5.2.12 FB input current I
FB
-1 -0.1 0 µA IFX91041EJV
V
FB
= 0.6V
5.2.13 FB input current
I
FB
– – 900 µA IFX91041EJV50,
IFX91041EJV33
5.2.14 Power stage on-resistance
R
on
–– 500mΩ tested at 300 mA
5.2.15 Current transition rise/fall time
t
r
–50– nsI
CC
=1 A
2)
5.2.16 Buck peak over current limit I
BUOC
2.2 – 3.6 A –
5.2.17 Bootstrap under voltage lockout,
turn-off threshold
V
BDS,off
V
BUO
+3.3
– – V Bootstrap voltage
decreasing
5.2.18 Charge pump current
I
CP
2– – mAV
S
= 12V;
V
BUO
= V
BDS
= GND