Power-Management ICs for
ICERA E400/E450 Platform
MAX8982A/MAX8982X
27
Pin Description
PIN
NAME
FUNCTION
MAX8982A MAX8982X
GROUND
A3 GND GND Analog Ground
F1 PGND1 PGND1 Power Ground for BUCK1
E1 PGND2 PGND2 Power Ground for BUCK2
E7 PGND3 PGND3 Power Ground for BUCK3
F6, F7 PGND4 PGND4 Power Ground for BUCK4
INPUT SUPPLY
F4
IN1A —
Input Supply to the IC. The operating voltage range for the MAX8982A is 4.1V to 5.5V.
Connect three 330FF tantalum capacitors as close as possible to IN1A and IN1B.
Connect IN1A to IN1B.
— IN1A
Input Supply to the IC. The operating voltage range for the MAX8982X is 2.9V to 5.5V.
Bypass with a 22FF ceramic capacitor as close as possible to IN1A and IN1B. Connect
IN1A to IN1B.
E4 IN1B IN1B Input Supply to the IC. Connect IN1B to IN1A.
C1 IN3 IN3
Input Supply for LDO4 and LDO9. Connect IN3 to the BUCK2 output. Bypass IN3 with a
2.2FF ceramic capacitor as close as possible to IN3.
F3
IN4 —
Input Supply for LDO8. Bypass with a 1FF ceramic capacitor as close as possible to IN4.
The IN4 operating range is from 3.0V to 5.5V. Connect IN4 to either IN1A and IN1B.
— IN4 Connect IN4 to Both IN1A and IN1B
B7
V
DDA
—
Power Input for LDO1 and LDO2. Connect V
DDA
to V
DDB
. Bypass V
DDA
with a 10FF
ceramic capacitor as close as possible to V
DDA
.
— V
DDA
Power Input for LDO1 and LDO2. Connect V
DDA
to V
DDB
, IN1A, and IN1B.
B6
V
DDB
— Power Input for LDO3, LDO5, LDO6, and LDO7. Connect V
DDB
to V
DDA
.
— V
DDB
Power Input for LDO3, LDO5, LDO6, and LDO7. Connect V
DDB
to V
DDA,
IN1A, and IN1B
.
BUCK CONVERTERS
F2 LX1 LX1
BUCK1 Inductor Connection. LX1 connects to the drains of the internal p-channel and
n-channel MOSFETs.
D1 LX2 LX2
BUCK2 Inductor Connection. LX2 connects to the drains of the internal p-channel and
n-channel MOSFETs.
D7
LX3 —
BUCK3 Inductor Connection. LX3 connects to the drains of the internal p-channel and
n-channel MOSFETs.
— DNC Do Not Connect
E5, F5
LX4 —
BUCK4 Inductor Connection. LX4 connects to the drains of the internal p-channel and
n-channel MOSFETs. Connect the two LX4 bumps together externally.
— DNC Do Not Connect
E2 BUCK1 BUCK1 BUCK1 Output Feedback
D2 BUCK2 BUCK2 BUCK2 Output Feedback
D6
BUCK3 — BUCK3 Output Feedback
— DNC Do Not Connect
E6
BUCK4 — BUCK4 Output Feedback
— DNC Do Not Connect
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