XRP7724
Quad Channel Digital PWM/PFM
Programmable Power Management System
BLOCK DIAGRAM
BST1
Channel 1
VOUT1
Feedback
ADC
Digital
PID
VCC
Current
ADC
Hybrid
DPWM
Dead
Time
Gate
Driver
GH1
LX1
GL1
GL_RTN1
PreScaler
1/2/4
V
REF
DAC
SS & PD
VCCD1-2
VOUT3
Channel 2
VOUT3
Channel 3
VCCD3-4
VOUT4
Channel 4
Vout1
4uA
ENABLE
Vout2
Internal
POR
MUX
Vout3
Vout4
Vtj
Fault
Handling
OTP
UVLO
OCP
OVP
GPIO 0-1
GPIO
NVM
(FLASH)
Configuration
Registers
LOGIC
Sequencing
PWR
Good
BFB
VCC
PSIO 0-2
PSIO
SDA,SCL
I2C
CLOCK
5V LDO
LDO5
3.3V LDO
LDO3_3
Fig. 2: XRP7724 Block Diagram
LDO BLOCK DIAGRAM
VCCD3-4
VCCD1-2
LDO5
AVDD
DVDD
Gate Drivers
5V Blocks
PSIO
VCC
5V LDO
1.8V
Regulator
1.8V Analog
3.3V Regulator
3.3V GPIO
1.8V Digital
LDO3_3
3.3V LDO
+
-
4.75V
–
4.9V
V5EXT
Fig. 3: XRP7724 LDO Block Diagram
© 2012 Exar Corporation
7/29
Rev. 1.0.1
EXAR [ EXAR CORPORATION ]
