ADP1876ACPZ-R7 Analog Devices, Inc., ADP1876ACPZ-R7 Datasheet - Page 3

• Manufacturer Part Number: ADP1876ACPZ-R7
• Description: 600 Khz Dual Output Synchronous Buck Pwm Controller With Linear Regulator
• Manufacturer: Analog Devices, Inc.

Data Sheet
FUNCTIONAL BLOCK DIAGRAM
VOUTLDO
VINLDO
COMP1
RAMP1
TRK1
EN1
EN2
FB1
SS1
NC
0.6V
1kΩ
RAMP GENERATOR
SLOPE COMP AND
–
+
+
+
REGULATOR
FAULT
SHUTDOWN
g
THERMAL
LINEAR
+
–
+
–
m
ERROR
AMPLIFIER
6.5µA
EN1
LOGIC
OVER_LIM1
3.2V
OV1
OVER_LIM1
OSCILLATOR
DL
DRIVER
600kHz
LOGIC
UVLO
0.9V
LDO
VIN
Figure 2. Functional Block Diagram
CURRENT-
CONTROL
COMPARATOR
+
+
LIMIT
–
–
Rev. A | Page 3 of 24
VCCO
PWM
0.6V
FB2
A
PH1
PH2
V
OVER_LIM1
PULSE SKIP
= 3, 6, 12, 24
EN1_SW
EN2_SW
EN1_SW
DUPLICATE FOR
OV
UV
CHANNEL 2
OV1
REF
ZERO CROSS
DETECT
+
+
–
–
–
+
CS GAIN
DRIVER LOGIC
CONTROL AND
DCM
MACHINE
+
–
STATE
CURRENT SENSE
AMPLIFIER
OV
0.6V
UV
–
+
VCCO
OV1
UV1
ADP1876
LOGIC
VCCO
50µA
12kΩ
VCCO
AGND
PGOOD1
BST1
DH1
SW1
VDL
DL1
PGND1
ILIM2
ADP1876