MAX5986A MAXIM [Maxim Integrated Products], MAX5986A Datasheet - Page 9

• Manufacturer Part Number: MAX5986A
• Description: IEEE 802.3af-Compliant, High-Efficiency, Class 1,Powered Devices with Integrated DC-DC Converter
• Manufacturer: MAXIM [Maxim Integrated Products]

Powered Devices with Integrated DC-DC Converter
MAX5986A
IEEE 802.3af-Compliant, High-Efficiency, Class 1,
—
—
1
2
3
4
TOP VIEW
PIN
MAX5987A
PGND
RREF
V
V
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DD
CC
—
—
1
2
3
4
*EXPOSED PAD, CONNECT TO GND
13
14
15
16
+
LDO_OUT
12
1
LDO_IN
NAME
AUX
LED
WK
LX
MAX5986A
11
2
TQFN
10
3
Auxiliary Voltage Input. Auxiliary input to the internal regulator V
to output of buck converter if the output voltage greater than 4.75V to back bias the
internal circuitry and increase efficiency. Connect to a clean ground when not used.
Inductor Connection. Inductor connection for the internal DC-DC converter.
LED Driver Output. In sleep mode, LED sources a periodic current (I
25% duty cycle.
Wake Mode Enable Input. WK has an internal 50kI pullup resistor to the internal 5V
bias rail. A falling edge on WK brings the device out of sleep mode and into the nor mal
operating mode (wake mode).
LDO Input Voltage. Connect LDO_IN to output when used, otherwise connect to GND.
Connect a minimum 1FF bypass capacitor between LDO_IN and GND.
LDO Output Voltage. Connect a minimum 1FF output capacitor between LDO_OUT and
GND.
*EP
9
4
8
7
6
5
SL
VDRV
GND
FB
PGND
MAX5986A/MAX5987A
RREF
V
V
DD
CC
*EXPOSED PAD, CONNECT TO GND
13
14
15
16
FUNCTION
+
12
1
MAX5987A
11
2
TQFN
Pin Configurations
10
3
*EP
Pin Description
9
4
DRV
. Connect AUX
LED
8
7
6
5
) at 250Hz with
LDO_FB
VDRV
GND
FB