ISL6722A Datasheet, PDF (1/24 Pages) Intersil Corporation – Flexible Single Ended Current Mode PWM

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Data Sheet
ISL6722A, ISL6723A
July 11, 2007
FN9237.1
Flexible Single Ended Current Mode PWM
Controllers
The ISL6722A and the ISL6723A are low power,
single-ended pulse width modulating (PWM) current mode
controllers designed for a wide range of DC/DC conversion
applications including boost, flyback, and isolated output
configurations. Similar to, and pin compatible with the
ISL6721, the ISL6722A and ISL6723A offer a modified
feature set. The ISL6722A replaces external synchronization
with a low power SLEEP feature that reduces standby
current to under 200µA. The ISL6723A changes the supply
voltage UVLO threshold to 13V. Additionally, the internal
over temperature protection has been removed in both
controllers. Other features remain the same and include a
low power mode during overvoltage and overcurrent
shutdown faults where the supply current drops to 200µA.
An internal 300ms delay timer prevents rapid “hiccup”
behavior when a shutdown fault does occur.
This advanced BiCMOS design features low operating
current, adjustable operating frequency up to 1MHz, and
adjustable soft-start.
Pinouts
ISL6722A, ISL6723A (16 LD SOIC, TSSOP)
GATE 1
ISENSE 2
SYNC/SLEEP 3
SLOPE 4
UV 5
OV 6
RTCT 7
ISET 8
16 VC
15 PGND
14 VCC
13 VREF
12 LGND
11 SS
10 COMP
9 FB
ISL6722A (16 LD QFN)
16 15 14 13
SYNC/SLEEP 1
SLOPE 2
UV 3
OV 4
12 VCC
11 VREF
10 LGND
9 SS
5678
Features
• 1A MOSFET Gate Driver
• 100µA Start-up Current
• Fast Transient Response with Peak Current Mode Control
• Adjustable Switching Frequency up to 1MHz
• Low Power Sleep Mode (ISL6722A)
• Low Power Shutdown Mode
• Delayed Restart from OV and OC Shutdown Faults
• Adjustable Slope Compensation
• Adjustable Soft-Start
• Adjustable Overcurrent Shutdown Delay
• Adjustable UV and OV Monitors
• Leading Edge Blanking
• 1% Tolerance Voltage Reference
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Telecom and Datacom Power
• Wireless Base Station Power
• File Server Power
• Industrial Power Systems
• Isolated Buck and Flyback Regulators
• Boost Regulators
Ordering Information
PART
NUMBER*
(Note)
PART
TEMP. PACKAGE
MARKING RANGE (°C) (Pb-Free)
PKG.
DWG. #
ISL6722AABZ 6722AABZ -40 to +105 16 Ld SOIC M16.15
ISL6723AABZ 6723AABZ -40 to +105 16 Ld SOIC M16.15
ISL6722AAVZ 6722AAVZ -40 to +105 16 Ld TSSOP M16.173
ISL6722AARZ 22AZ
-40 to +105 16 Ld QFN L16.3x3B
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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