Rainbow Electronics MAX8982X - Manual (Page 33)

Power-Management ICs for
ICERA E400/E450 Platform
MAX8982A/MAX8982X
33
Figure 2. MAX8982X Typical Application Circuit and Functional Block Diagram
N
IN1A
V DDA
V DDB
IN1B
IN4
3.3V
INPUT
0.1µF
2.2µF
22µF
0.9V
2.7V
REFBP
GND
OUT9
5.75V
LDO9
(50mA)
2.7V
SHUTDOWN SIGNAL
ON/OFF SEQUENCE
OVP
UVLO
IN3
IN1B
VCC_USB
1µF
OUT6
LDO6
(50mA)
V DDB
TCXO
UVLO
(2.7V)
REF
(0.8V)
THERMAL
SHUTDOWN
+160°C
N
N
V DDB
MAX8982X
ON/OFF CONTROL
AND
I 2 C INTERFACE
2.2µH
2.2µF
CORE
DCDC 1 SEL
VCC_IO
PGND1
IN1A
LX1
BUCK1
DVS1
P
N
STEP-DOWN
DC-DC 1
CONVERTER
(1.2A)
LDO4
(50mA)
ON = BUCK 2EN + 625µs
1µH 1.8V
2.2µF
2.2µF
PGND2
IN1A
LX2
BUCK2
BUCK2
IN3
OUT4
14kI
P
N
VCC_PLL
POR_N
0.9V
STEP-DOWN
DC-DC 2
CONVERTER
(DEFAULT
ON, 600mA)
RESET
RTBON
1µF
OUT3 ANALOG
BASEBAND
BB CHIPSET
ICE 8060
ON E400
PLATFORM
RESET
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
1.8V
1µF
N
V DDB
V SIM
1.8V/3.0V
SIM LDO (LDO7)
150mA
1µF
N
RF
CHIPSET
ICE 82 xx
USIM
SD CARD
16ms
TIMER
IN1_
EN
ON/OFF
SEQUENCE
SHUTDOWN
SIGNAL
INTERRUPT
BB
CHIPSET
ICE8060
ON E400
PLATFORM
IRQ
SDA
SDA
SCL
SCL
PWR_REQ
PWR_REQ
32kHz
OSCILLATOR
BUCK2
200kI
3.3V INPUT
N32kHz
DR1
BB
OSC 32kI
FLASH
TIMER
BUCK2
DR2
DR3
OPTIONAL
RESISTORS
3-CHANNEL
CURRENT
REGULATOR
(24mA,
DEFAULT)
(3—24mA IN 3mA STEPS)
0.9V (DEFAULT)
0.6V TO 1.2V
IN 25mV STEPS