DATASHEET
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
Improved Industry Standard Single-Ended Current Mode PWM Controller
The ISL6840, ISL6841, ISL6842, ISL6843, ISL6844,
ISL6845 family of adjustable frequency, low power, pulse
width modulating (PWM) current mode controllers is
designed for a wide range of power conversion applications
including boost, flyback, and isolated output configurations.
Peak current mode control effectively handles power
transients and provides inherent overcurrent protection.
This advanced BiCMOS design is pin compatible with the
industry standard 384x family of controllers and offers
significantly improved performance. Features include low
operating current, 60µA start-up current, adjustable
operating frequency to 2MHz, and high peak current drive
capability with 20ns rise and fall times.
PART NUMBER
ISL6840
ISL6841
ISL6842
ISL6843
ISL6844
ISL6845
RISING UVLO (V) MAX. DUTY CYCLE (%)
7.0
7.0
14.4
8.4
14.4
8.4
100
50
100
100
50
50
FN9124
Rev 13.00
February 18, 2015
Features
• 1A MOSFET Gate Driver
• 60µA Start-up Current, 100µA Maximum
• 25ns Propagation Delay Current Sense to Output
• Fast Transient Response with Peak Current Mode Control
• Adjustable Switching Frequency to 2MHz
• 20ns Rise and Fall Times with 1nF Output Load
• Trimmed Timing Capacitor Discharge Current for Accurate
Deadtime/Maximum Duty Cycle Control
• High Bandwidth Error Amplifier
• Tight Tolerance Voltage Reference Over Line, Load, and
Temperature
• Tight Tolerance Current Limit Threshold
• Pb-Free Available (RoHS Compliant)
Applications
• Telecom and Datacom Power
• Wireless Base Station Power
• File Server Power
• Industrial Power Systems
• PC Power Supplies
• Isolated Buck and Flyback Regulators
• Boost Regulators
Pinouts
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
(8 LD SOIC, MSOP)
TOP VIEW
COMP 1
FB 2
CS 3
RTCT 4
8 VREF
7 VDD
6 OUT
5 GND
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
(8 LD DFN)
TOP VIEW
COMP
FB
CS
RTCT
1
2
3
4
8
7
6
5
VREF
VDD
OUT
GND
FN9124 Rev 13.00
February 18, 2015
Page 1 of 14
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
Ordering Information
PART NUMBER
(Note 4)
ISL6840IRZ-T (Notes 2, 3)
ISL6840IUZ (Notes 1, 3)
ISL6841IUZ (Notes 1, 3)
ISL6842IBZ (Notes 1, 3)
40Z
6840Z
6841Z
6842 IBZ
PART MARKING
TEMP RANGE
(°C)
-40 to +105
-40 to +105
-40 to +105
-40 to +105
-40 to +105
PACKAGE
8 Ld 2x3 DFN (Pb-free)
8 Ld MSOP (Pb-free)
8 Ld MSOP (Pb-free)
8 Ld SOIC (Pb-free)
8 Ld 2x3 DFN (Pb-free)
PKG. DWG. #
L8.2x3
M8.118
M8.118
M8.15
L8.2x3
ISL6842IRZ-T (Notes 2, 3)
(No longer
42Z
available, recommended
replacement: ISL6842IBZ-T)
ISL6842IUZ (Notes 1, 3)
(No longer
available, recommended
replacement: ISL6842IBZ)
ISL6843IBZ (Notes 1, 3)
ISL6843IU-T
(No longer available,
recommended replacement:
ISL6843IUZ-T)
ISL6843IUZ (Notes 1, 3)
ISL6844IBZ (Notes 1, 3)
(No longer
available, recommended
replacement: ISL8844AABZ)
ISL6845IBZ (Notes 1, 3)
(No longer
available, recommended
replacement: ISL8845AABZ)
ISL6841EVAL3Z
NOTES:
6842Z
-40 to +105
8 Ld MSOP (Pb-free)
M8.118
6843 IBZ
6843
-40 to +105
-40 to +105
8 Ld SOIC (Pb-free)
8 Ld MSOP
M8.15
M8.118
6843Z
6844 IBZ
-40 to +105
-40 to +105
8 Ld MSOP (Pb-free)
8 Ld SOIC (Pb-free)
M8.118
M8.15
6845 IBZ
-40 to +105
8 Ld SOIC (Pb-free)
M8.15
Evaluation Board
1. Add “-T*” suffix for tape and reel. Please refer to
TB347
for details on reel specifications.
2. Contact Factory for Availability.
3. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is 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.
4. For Moisture Sensitivity Level (MSL), please see device information page for
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845.For
more
information on MSL please see tech brief
TB363.
FN9124 Rev 13.00
February 18, 2015
Page 2 of 14
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