IR3895MPBF IRF [International Rectifier], IR3895MPBF Datasheet - Page 3

• Manufacturer Part Number: IR3895MPBF
• Description: 16A HIGHLY INTERGRATED SUPLRBUCK
• Manufacturer: IRF [International Rectifier]

BLOCK DIAGRAM
Enable
S_Ctrl
Comp
Gnd
Vref
Vp
Fb
UVEN
START
SOFT
POR
3
UVcc
OV
Intl_SS
0.15V
AUGUST 08, 2012 | DATA SHEET| Rev 3.1
V
UVEN
LDO_Ref
FAULT
OVER VOLTAGE
POR
PROTECTION
SSOK
-
+
Figure 3: IR3895 Simplified Block Diagram
Vin
LDO
VREF
VREF
POR
Vsns
Vp
Rff
+
+
+
-
VREF
Single‐Input Voltage, Synchronous Buck Regulator
Vin
E/A
Vp
DCM
FB
Vcc/ LDO_Out
VCC
CONTROL
LOGIC
Rt/Sync
0.5V
FAULT
OV
UVcc
- 3 -P
POR
PGood
OV
16A Highly Integrated SupIRBuck
POR
HDin
OC
DCM
LDin
UVcc
CONTROL
ZERO CROSSING
OVER CURRENT
FAULT
LOGIC
DRIVE
GATE
COMPARATOR
PROTECTION
FAULT
TSD
VCC
OC
SHUT DOWN
THERMAL
HDrv
LDrv
IR3895
PD‐97746
PGnd
SW
PVin
Boot