MAX14544 Datasheet, PDF (7/10 Pages) Maxim Integrated Products – 28V-Capable, ILIM VBUS Accessory Switch

28V-Capable, I_LIM V_BUS Accessory Switch
Pin Description
PIN
NAME
FUNCTION
1, 2
IN
Input Voltage. Connect IN pins 1 and 2 together and bypass IN to GND with a 10FF ceramic capacitor as
close to the device as possible.
3
ISET
Current-Limit Setting. Drive ISET low to have a 200mA current limit. Drive ISET high to have a 400mA cur-
rent limit.
4
GND Ground
Active-Low Fault Open-Drain Output. FLAG goes low when the forward output current is exceeded for
5
FLAG longer than the blanking time, the reverse current limit is exceeded, the OVP threshold on IN is reached,
or the part goes into thermal shutdown. FLAG is high impedance when EN is low or a fault is not present.
6
EN Active-High Switch-Enable Input. Drive EN high to turn on the device. Drive EN low to turn off the device.
7, 8
OUT
Output Voltage. Connect OUT pins 7 and 8 together and bypass OUT to GND with a 1FF ceramic capaci-
tor as close to the device as possible.
—
EP
Exposed Pad. Connect EP to GND. For enhanced thermal dissipation, connect EP to a large copper
ground plane. Do not use EP as the sole ground connection.
Functional Diagram
IN
UVLO
OVLO
EN
ISET
FLAG
REVERSE
CURRENT
FORWARD CURRENT
MAX14544
MAX14545
OUT
CHARGE PUMP
CONTROL
GND
7