Rainbow Electronics MAX8982X User Manual
Page 31
Power-Management ICs for
ICERA E400/E450 Platform
MAX8982A/MAX8982X
31
Figure 1. MAX8982A Typical Application Circuit and Functional Block Diagram
N
IN1A
LX4
PGND4
IN1A
LX4
PGND4
BUCK4
IN1_
5V
IN1B
330µF * 3
USB
INPUT
0.1µF
2.2µF
0.9V
2.7V
REFBP
GND
OUT9
3.8V
UVLO
OVP
LDO9
(50mA)
16ms
TIMER
5.75V
ON/OFF SEQUENCE
SHUTDOWN SIGNAL
IN3
IN1_
IN1B
D-
D+
G
BB
P
N
1µF
1µF
OUT6
EN
LDO6
(50mA)
ON/OFF
SEQUENCE
SHUTDOWN
SIGNAL
V
DDB
TCXO
IN1_
IN4
1µF
OUT8
INTERRUPT
BB
CHIPSET
ICE8060
ON E400
PLATFORM
STEP-DOWN
CONVERTER 4
(1.8A)
UVLO
(3.8V)
REF
(0.8V)
THERMAL
SHUTDOWN
+160°C
IRQ
SDA
SDA
SCL
SCL
PWR_REQ
PWR_REQ
HS USB
TRANSCEIVER
3.0V
N
N
N
LDO8
(DEFAULT ON)
150mA
REF
V
DDB
32kHz
OSCILLATOR
MAX8982A
ON/OFF CONTROL
AND
I
2
C INTERFACE
2.2µF
2.2µH
2.2µH
0.9V (DEFAULT)
0.6V TO 1.2V
IN 25mV STEPS
2.2µF
CORE
DCDC 1 SEL
VCC_IO
3.4V (DEFAULT)
3.0V TO 3.75V IN 50mV STEPS
GSM PA/
UMTS PA
PGND3
IN1A
LX3
BUCK3
P
N
STEP-DOWN
DC-DC 3
CONVERTER
(DEFAULT ON)
VDDA
LDO
VDDB
INPUT
2.2µF
2.2µH
3.2V (DEFAULT)
2.9V TO 3.65V
IN 50mV STEPS
PGND1
IN1A
LX1
BUCK1
DVS1
P
N
STEP-DOWN
DC-DC 1
CONVERTER
(1.2A)
LDO4
(50mA)
1µH
1.8V
2.2µF
2.2µF
PGND2
IN1A
LX2
BUCK2
BUCK2
625µs
IN3
OUT4
14kI
P
N
PLL
POR_N
0.9V
STEP-DOWN
DC-DC 2
CONVERTER
(DEFAULT
ON, 600mA)
RESET
RTBON
2.2µF
OUT3
ANALOG
BASEBAND
BB CHIPSET
ICE 8060
ON E400
PLATFORM
RESET
BUCK2
10µF
LDO3
DEFAULT ON
150mA
2.8V
1µF
N
V
DDA
OUT2
LDO2
(150mA)
LDO1
(300mA)
1.8V
RF1V8
RF2V7
1µF
N
V
DDA
OUT1
2.7V
4.7µF
N
V
DDB
OUT5
LDO5
(150mA)
3.0V
1µF
N
V
DDB
VSIM
1.8V/3.0V
SIM LDO (LDO7)
150mA
1µF
N
BUCK2
200kI
IN1_
N32kHz
DR1
BB
OSC 32kI
FLASH
TIMER
BUCK2
DR2
DR3
OPTIONAL
RESISTORS
3-CHANNEL
CURRENT
REGULATOR
(24mA,
DEFAULT)
(3—24mA IN 3mA STEPS)
RF
CHIPSET
ICE 8260
USIM
SD CARD