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Si4804CDY Datasheet(PDF) 3 Page - Analog Devices

Part # Si4804CDY
Description  Dual 3 A, 20 V Synchronous Step-Down Regulator with Integrated High-Side MOSFET
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

Si4804CDY Datasheet(HTML) 3 Page - Analog Devices

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Data Sheet
ADP2323
Rev. A | Page 3 of 32
FUNCTIONAL BLOCK DIAGRAM
+
+
0.6V
ISS1
SS1
FB1
COMP1
Σ
AMP1
CONTROL
LOGIC
AND MOSFET
DRIVER WITH
ANTICROSS
PROTECTION
BST1
SW1
I1MAX
I1MAX
HICCUP
MODE
NFET1
VDRV
DL1
0.7V
0.54V
OVP
PGOOD1
PVIN1
UVLO
EN1
CURRENT-
LIMIT
SELECTION
OSCILLATOR
PGND
SCFG
SYNC
RT
CLK1
CLK2
SLOPE RAMP1
SLOPE RAMP2
5V REGULATOR
EN1_BUF
ADP2323
EN1_BUF
EN2_BUF
INTVCC
PVIN1
GND
MODE
MODE_BUF
SKIP MODE
THRESHOLD
MODE_BUF
SKIP
CMP1
SLOPE RAMP1
CLK1
+
ZERO CURRENT
CMP
VDRV
+
TRK1
+
+
1.2V
4µA
1µA
OCP
CMP1
+
+
+
+
DRIVER
DRIVER
BOOST
REGULATOR
+
+
0.6V
ISS2
SS2
FB2
COMP2
Σ
AMP2
CONTROL
LOGIC
AND MOSFET
DRIVER WITH
ANTICROSS
PROTECTION
BST2
SW2
I2MAX
I2MAX
HICCUP
MODE
NFET2
VDRV
DL2
0.7V
0.54V
OVP
PGOOD2
PVIN2
UVLO
EN2
CURRENT-
LIMIT
SELECTION
EN2_BUF
SKIP MODE
THRESHOLD
MODE_BUF
SKIP
CMP2
SLOPE RAMP2
CLK2
+
ZERO CURRENT
CMP
+
TRK2
+
+
1.2V
4µA
1µA
OCP
CMP2
+
+
+
+
DRIVER
DRIVER
BOOST
REGULATOR
ACS1
ACS2
Figure 3. Functional Block Diagram


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