ISL6540ACRZ Intersil, ISL6540ACRZ Datasheet - Page 17

• Manufacturer Part Number: ISL6540ACRZ
• Description: IC CTLR PWM BUCK 1PHASE 28-QFN
• Manufacturer: Intersil

Specifications of ISL6540ACRZ

• Pwm Type: Voltage Mode
• Number Of Outputs: 1
• Frequency - Max: 2MHz
• Duty Cycle: 100%
• Voltage - Supply: 2.97 V ~ 22 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Frequency-max: 2MHz
• Number Of Pwm Outputs: 1
• On/off Pin: No
• Adjustable Output: Yes
• Topology: Buck
• Switching Freq: 250 TO 2000kHz
• Operating Supply Voltage (max): 5.5V
• Output Current: 4A
• Output Voltage: 0.6 to 20V
• Synchronous Pin: No
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 28
• Package Type: QFN EP
• Rohs Compliant: YES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

+3.3V TO +20V
VCC
(C
(MINIMIZE CONNECTION PATH)
C
R
R
PG_DLY
F3
OFS-
R
OFS+
R
)
VFF
R
LOCATE CLOSE TO IC
MARG
C
FS
SS
R
VIN
MARCTRL
C
REFOUT
PG_DLY
VFF
REFIN
OFS+
OFS-
VFF
VIN
EN
PG
SS
FS
(C
F1
)
17
INTERNAL BIAS
LINEAR REGULATOR
FIGURE 8. PRINTED CIRCUIT BOARD POWER PLANES AND ISLANDS
LINDRV
VCC
ISL6540A
R
CC
GND
PVCC
PGND
(C
L
IN
F2
BOOT
HSOC
UGATE
PHASE
LSOC
COMP
FB
VSEN+
VSEN-
LGATE
VMON
)
C
ISL6540A
1
D
BOOT
C
C
R
R
HSOC
LSOC
LSOC
HSOC
R
C
KEY
2
2
Q1
HEAVY TRACE ON CIRCUIT PLANE LAYER
ISLAND ON/POWER PLANE LAYER
ISLAND ON CIRCUIT PLANE LAYER
VIA CONNECTION TO GROUND PLANE
Q2
(C
C
HFIN
(MINIMIZE CONNECTION PATH)
SEN
)
LOCATE NEAR LOAD
C
LOCATE NEAR SWITCHING TRANSISTORS
C
3
BOOT
R
(MINIMIZE CONNECTION PATH)
L
1
OUT
R
C
(C
OS
R
R
BIN
HFOUT
3
FB
)
R
LS-
C
BOUT
V
V
V
R
SENSE-
OUT
SENSE+
LS+
October 7, 2008
FN6288.5