UZXYY ANALOGICTECH [Advanced Analogic Technologies], UZXYY Datasheet - Page 12

• Manufacturer Part Number: UZXYY
• Description: PCMCIA Current Limit Interface and Capacitor Charger
• Manufacturer: ANALOGICTECH [Advanced Analogic Technologies]

Digitally Programmed Soft Start
Current Limit
At turn on, the digital soft start increases the load
current in discrete levels equal to 1/32 of the final
programmed current limit set point from zero to the
final programmed current limit level.
12
GND
VCC
J2
ENIU
J1
ENIL
3
2
1
3
2
1
J4
2
1
Figure 3: AAT4620 Evaluation Board PCB Top Side.
Figure 2: AAT4620 Evaluation Board Schematic.
C1
10μF
1
2
3
4
5
6
ENIU
ENIL
GND
VCC
VCC
VCC
4.7K
R1
AAT4620
ISETU
RHYS
ISETL
D1
OUT
OUT
RDY
10μF
12
11
10
9
8
7
C2
Reverse Current Blocking
An internal comparator disables the internal pass
transistor when the input voltage is less than the
output voltage blocking any reverse current from
the output to the input.
Evaluation Board
The evaluation board schematic is shown in Figure 2.
The PCB layout is shown in Figures 3 and 4.
PCMCIA Current Limit Interface
1.00M
R4
120K
R3
RDY
and Capacitor Charger
R2
200K
J3
1
2
Out
GND
AAT4620
4620.2007.04.1.1