IR3551MTRPBF International Rectifier, IR3551MTRPBF Datasheet - Page 3

• Manufacturer Part Number: IR3551MTRPBF
• Description: The IR3551 integrated PowIRstage is a synchronous buck gate driver IC with co-packed control and synchronous MOSFETs and Schottky diode.
• Manufacturer: International Rectifier

Specifications of IR3551MTRPBF

• Package: PQFN / 5 x 6
• Iout (a): 50
• Switch Freq (khz): up to 1.0MHz
• Input Range (v): 4.5 - 15
• Output Range (v): 0.25 - (VCC -2.5)

TYPICAL APPLICATION DIAGRAM (CONTINUED)
FUNCTIONAL BLOCK DIAGRAM
4.5V to 7V
PHSFLT#
BBRK#
PWM
VCC
3
10k
PHSFLT#
R1
BBRK# 23
REFIN
LGND
PWM
IOUT
March 12, 2012 | FINAL DATASHEET
VCC
22
21
24
26
25
24
3
21
22
23
25
26
0.1uF
C3
No Connect
IR3551
PHSFLT#
PWM
BBRK#
REFIN
LGND
IOUT
TGND
3.3V
IR3551
200k
27
Figure 5: Application Circuit without Current Sense Amplifier
& Thermal
Current Sense
Detection
MOSFET
Amplifier
CSIN-
POR
+
-
CSIN-
Amplifier
Current
Drivers
Figure 6: IR3551 Functional Block Diagram
1
R
S
1
Sense
Gate
3.3V
and
Q
CSIN+
3
VCC
2
2
CSIN+
Reference,
Dead-time
Power-on
PGND
50A Integrated PowIRstage®
Control
(POR),
Reset
BOOST
3.3V
and
4
20
VCC
TGND
27
16-19
VIN
Driver
VCC
Comparator
Emulation
GATEL
BOOST
Diode
PGND
PGND 4
5
Driver
SW
Offset
+
-
GATEL
28
14, 15
20
6-13
VIN
16
+
-
18k
0.22uF
VIN
17
0.1uF
C5
C1
PGND
14
2.49k
R2
VIN
18
PGND
150nH
CS+
15
L1
0.22uF
VIN
19
10uF x 2
C4
C2
CS-
4.5V to 15V
22uF
10
11
12
13
C6
6
7
8
9
VIN
SW
SW
SW
SW
SW
SW
SW
SW
IR3551
470uF
C7
VOUT