ISL8104 Datasheet, PDF (1/14 Pages) Intersil Corporation – 8V to 14V, Single-Phase Synchronous Buck Pulse-Width Modulation PWM Controller With Integrated Gate Drivers

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Data Sheet
March 7, 2008
ISL8104
FN9257.2
8V to 14V, Single-Phase Synchronous
Buck Pulse-Width Modulation (PWM)
Controller With Integrated Gate Drivers
The ISL8104 is a 8V to 14V synchronous PWM controller
with integrated MOSFET drivers. The controller features the
ability to safely start-up into prebiased output loads and
provides protection against overcurrent fault events.
Overcurrent protection is implemented using top-side
MOSFET r_DS(ON) sensing, eliminating the need for a current
sensing resistor.
The ISL8104 employs voltage-mode control with dual-edge
modulation to achieve fast transient response. The operating
frequency is adjustable from 50kHz to 1.5MHz with full (0%
to 100%) PWM duty cycle capability. The error amplifier
features a 15MHz (typ) gain-bandwidth product and 6V/µs
slew rate enabling high converter bandwidth.
The output voltage of the converter can be regulated to as
low as 0.597V with a tolerance of ±1.0% over the
commercial temperature range (0°C to +70°C), and ±1.5%
over industrial temperature range (-40°C to +85°C).
Provided in the QFN package, a SS pin and REFIN pin
enable supply sequencing and voltage tracking functionality.
Pinouts
ISL8104 (16 LD QFN)
TOP VIEW
16 15 14 13
SS 1
COMP 2
FB 3
12 PVCC
11 BGATE
10 PGND
EN 4
9 BOOT
5678
ISL8104 (14 LD SOIC)
TOP VIEW
FSET 1
TSOC 2
SS 3
COMP 4
FB 5
EN 6
GND 7
14 VCC
13 PVCC
12 BGATE
11 PGND
10 BOOT
9 TGATE
8 LX
Features
• +8V ±5% to +14V ±10% Bias Voltage Range
- 1.5V to 15.4V Input Voltage Range
• 0.597V Internal Reference Voltage
- ±1.0% Over the Commercial Temperature Range
- ±1.5% Over the Industrial Temperature Range
• Voltage-Mode PWM Control with Dual-Edge Modulation
• 14V High Speed N-Channel MOSFET Gate Drivers
- 2.0A Source/3A Sink at 14V Bottom-Side Gate Drive
- 1.25A Source/2A Sink at 14V Top-Side Gate Drive
• Fast Transient Response
- 15MHz (typ) Gain-Bandwidth Error Amplifier with 6V/µs
slew rate
- Full 0% to 100% Duty Cycle Support
• Programmable Operating Frequency from 50kHz to
1.5MHz
• Lossless Programmable Overcurrent Protection
- Top-Side MOSFET’s r_DS(ON) Sensing
- ~120ns Blanking Time
• Sourcing and Sinking Current Capability
• Support for Start-Up into Prebiased Loads
• Soft-Start Done and an External Reference Pin for
Tracking Applications are Available in the QFN Package
• Pb-free available (RoHS compliant)
Applications
• Test and Measurement Instruments
• Distributed DC/DC Power Architecture
• Industrial Applications
• Telecom/Datacom Applications
Ordering Information
PART NUMBER PART
TEMP.
PACKAGE PKG.
(Note)
MARKING RANGE (°C) (Pb-free) DWG. #
ISL8104CBZ* 8104CBZ 0 to +70 14 Ld SOIC M14.15
ISL8104IBZ* 8104IBZ -40 to +85 14 Ld SOIC M14.15
ISL8104CRZ* 81 04CRZ 0 to +70 16 Ld 4x4 QFN L16.4x4
ISL8104IRZ* 81 04IRZ -40 to +85 16 Ld 4x4 QFN L16.4x4
ISL8104EVAL1Z Evaluation Board
ISL8104EVAL2Z Evaluation Board
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
NOTE: 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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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