AAT4620_12 Datasheet, PDF (12/14 Pages) Skyworks Solutions Inc. – PCMCIA Current Limit Interface and Capacitor Charger

DATA SHEET
AAT4620
PCMCIA Current Limit Interface and Capacitor Charger
Digitally Programmed
Soft Start Current Limit
At turn on, the digital soft start increases the load cur-
rent in discrete levels equal to 1/32 of the final pro-
grammed current limit set point from zero to the final
programmed current limit level.
Reverse Current Blocking
An internal comparator disables the internal pass tran-
sistor 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.
J2
3
2
1
ENIU
J1
3
2
1
ENIL
VCC ²
GND ¹
J4
R1
4.7K
D1
1 _ENIU
RDY ¹²
2 _ENIL
RHYS ¹¹
3 _GND
ISETU ¹⁰
4 _VCC
ISETL ⁹
5 _VCC
OUT ⁸
6 _VCC
OUT ⁷
AAT4620
C1
10μF
C2
10μF
RDY
R3
1.00M
R4
120K
R2
200K
1 Out
2 GND
J3
Figure 2: AAT4620 Evaluation Board Schematic.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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201943A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 15, 2012