SEN012-013
SUPPLY (VCC)
DRAIN1 (D1)
DRAIN2 (D2)
DRAIN3 (D3)
Gate Drive
and
Protection
STEP
DOWN
SOURCE3 (S3)
SOURCE2 (S2)
GROUND (G)
SOURCE1 (S1)
PI-5815-012810
Figure 3.
SENZero Functional Block Diagram
SOURCE (S1, S2, S3) Pins :
Internally connect to the SOURCEs of MOSFETs 1, 2 and 3
respectively.
DRAIN (D1, D2, D3) Pins :
Internally connect to the DRAINs of MOSFETs 1, 2 and 3
respectively.
VOLTAGE SUPPLY (VCC) pin
The internal MOSFETs are fully turned on when the VCC pin
voltage is V
CC(ON)
(see parameter table) or more greater than their
SOURCE voltage relative to GROUND. VCC pin should be
connected to GROUND to turn the MOSFETs off.
GROUND (G) Pin:
This is the ground reference for all the SENZero pin voltages.
R
DS(ON)
(Ω)
600
550
500
450
400
350
300
4
5
6
7
8
9
V
S
= 0
V
S
= 3
V
S
= 6.5
T
J
= 25 °C
10
11
V
CC
-V
S
(V)
Figure 5.
Typical R
DS(ON)
as a Function of V
CC
-V
S
Voltage.
D Package (SO-8)
SEN012DG
S1
D1
NC
S2
1
2
3
4
8
7
6
5
VCC
G
NC
D2
S1
D1
D2
S2
1
2
3
4
V
CC
-V
S
= 6 V
V
CC
-V
S
= 5 V
SEN013DG
8
7
6
5
VCC
G
D3
S3
500
R
DS(ON)
(Ω)
450
400
PI-5814-051710
350
Figure 4.
Pin Configuration.
0
1
2
3
4
5
6
7
V
S
(V)
Figure 6.
Typical R
DS(ON)
as a Function of V
S
Voltage.
2
Rev. B 11/05/10
www.powerint.com
PI-5939-071610
550
PI-5938-071610
Pin Functional Description
650
POWERINT [ POWER INTEGRATIONS, INC. ]
