ISL89411 INTERSIL [Intersil Corporation], ISL89411 Datasheet - Page 22

• Manufacturer Part Number: ISL89411
• Description: Intersil Power Management Solutions
• Manufacturer: INTERSIL [Intersil Corporation]

22
Intersil Power Management Solutions  2012  www.intersil.com
Integrated FET
Switching Regulators
High Efficiency
6A Int. FET Buck
Regulator
Key Features
• High Efficiency Over Full Load
• Space Saving and Fewer External
• Design Flexibility
• Protection
Range
○ PFM mode for improved
○ 6A guaranteed output current
Components
○ 1MHz fixed & 4MHz sync freq
○ High side P-Channel device
○ Internal Compensation
○ 3x4 QFN 20
○ Small overall solution size
○ Reduce size of inductor
○ 100% Duty cycle (V
○ Sync IN and Sync Out for master
○ ±10% Voltage margining
○ Internal (1ms) or External Soft-
○ Current sharing capability
○ Peak current limiting
○ Hiccup mode short circuit
○ Over temperature protection
○ Programmable Current limit
efficiency at light loads - 97%
peak efficiency
gives small inductor
reduces need for boost diode
slave
start
(multiple IC’s)
protection
IN
=V
OUT
)
100
95
90
85
80
75
70
Up to 97% efficiency
0.0
EFFICIENCY vs LOAD (1MHz 5V
2x22µF
INPUT
Small Solution Size
High Efficiency Over Full Load Range
1.0
Design Flexibility
Sync IN and Sync
Out for Master Slave
C1
2.5V
OUT
TOP COMPONENTS
2.0
2.7V TO 5.5V
1.8V
OUT
I
OUT
R1
100k
3.0
(A)
1.5V
VIN
OUT
Space Saving and Fewer
External Components
Small solution size reduce size
of an inductor
4.0
1.2V
OUT
IN
VIN
EN
PG
5.0
SYNCIN
SYNCOUT
FS
ISET
VSET
PWM)
Single Output Buck Regulators: ISL8016
3.3V
OUT
ISL8016
6.0
0.64”x0.28”
Solution Size
100
95
90
85
80
75
70
0.0
PFM mode for improved
efficiency at light loads
EFFICIENCY vs LOAD (1MHz 5VIN PFM)
PHASE
2.5V
PGND
SGND
COMP
Internal (1ms) or External Soft-start
VFB
OUT
SS
3.3V
0.3
OUT
1.8V
6A Guaranteed Output
Part will deliver up to 6A to
the load in a small package
OUT
0.6
1.0µH
2x47µF
L
* C3 is optional. Recommend
C2
putting a placeholder for it. Check
loop analysis first before use.
I
100k
OUT
1.5V
R3
0.9
Actual Size
(A)
200k
OUT
R2
OUTPUT 1.8V/6A
1.2
1.2V
OUT
1.5
C3*
10pF
1.8