MAX8893A Datasheet, PDF (49/50 Pages) Maxim Integrated Products – μPMICs for Multimedia Application Processors in a 3.0mm x 2.5mm WLP

µPMICs for Multimedia Application Processors
in a 3.0mm x 2.5mm WLP
Extended ESD Protection
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against electrostatic
discharges encountered during handling and assembly.
COM1 and COM2 are further protected against static
electricity. The state-of-the-art structures are developed
to protect these pins against ESD up to ±15kV without
damage. The ESD structures withstand high ESD in nor-
mal operation and when the device is powered down.
After an ESD event, the USB switch continues to function
without latchup.
The USB high-speed switch is characterized for protec-
tion to the following limits:
U ±15kV using Human Body Model
U ±8kV using IEC 61000-4-2 Contact Discharge method
U ±15kV using IEC 61000-4-2 Air-Gap Discharge method
PCB Layout and Routing
High switching frequencies and relatively large peak
currents make the PCB layout a very important aspect
of design. Good design minimizes excessive EMI on the
voltage gradients in the ground plane that can result in
instability or regulation errors. Connect the input and out-
put capacitors as close as possible to the IC. Connect
the inductor as close as possible to the IC and keep the
traces short, direct, and wide. Connect AGND to the
exposed pad directly under the IC. Connect AGND and
PGND to the ground plane. Keep noisy traces, such as
the LX node, as short as possible.
USB Hi-Speed requires careful PCB layout with 45ω
controlled-impedance matched traces of equal lengths.
Ensure that bypass capacitors are as close as possible
to the IC. Use large ground planes where possible.
Refer to the MAX8893 evaluation kit for an example PCB
layout design.
Typical Operating Circuit
INPUT
2.7V TO 5.5V
2.2µF
2.2µF
2.2µF
I2C
LS ON/OFF
BUCK ON/OFF
LDO1 ON/OFF
LDO2 ON/OFF
LDO3 ON/OFF
LDO4/LDO5 ON/OFF
USB ON/OFF
USBSEL
LS
IN1
IN2
BATT
SCL
SDA
MAX8893A
MAX8893B
ENLS MAX8893C
ENBUCK
ENLDO1
ENLDO2
ENLDO3
ENLDO45
BUCK
LX
PGND
REFBP
AGND
LDO1
LDO2
LDO3
LDO4
LDO5
2.2µH
ENUSB
NC1
CB
NC2
COM1
NO1
COM2
NO2
VLS
1.0µF
VBUCK
0.8V TO 2.4V
2.2µF
0.1µF
V_LDO1
1.6V TO 3.3V
2.2µF
V_LDO2
1.2V TO 3.3V
2.2µF
VLDO3
1.6V TO 3.3V
2.2µF
VLDO4
0.8V TO 3.3V
1µF
V_LDO5
0.8V TO 3.3V
2.2µF
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