®
ISL8106
Data Sheet
Wide VIN, 7V to 25V , Single-Phase PWM
Controller with Integrated MOSFET
Drivers
The ISL8106 is a Single-Phase Synchronous-Buck PWM
Controller with a input voltage range of +7.0V to +25.0V
featuring Intersil's Robust Ripple Regulator (R
that delivers exceptional dynamic response to input voltage
and output load transients. Integrated MOSFET drivers, 5V
LDO, and bootstrap diode result in fewer components and
smaller implementation area for power supply systems.
The ISL8106 features a 1.5ms digital soft-start and can be
started into a pre-biased output voltage. A resistor divider is
used to program the output voltage setpoint. The ISL8106
can be configured to operate in forced-continuousconduction-mode (FCCM) or in diode-emulation-mode
(DEM), which improves light-load efficiency. In FCCM the
controller always operates as a synchronous rectifier,
switching the bottom-side MOSFET regardless of the output
load. With DEM enabled, the bottom-side MOSFET is
disabled preventing negative current flow from the output
inductor during low load operation. This makes the ISL8106
an excellent choice for all “green” applications. An audio
filter prevents the PWM switching frequency from entering
the audible spectrum due to extremely light load while in
DEM.
A PGOOD pin featuring a unique fault-identification
capability significantly reduces system trouble-shooting time
and effort. The pull-down resistance of the PGOOD pin is
30Ω for an overcurrent fault, 60Ω for an overvoltage fault, or
90Ω for either an undervoltage fault or during soft-start.
Overcurrent protection is accomplished by measuring the
voltage drop across the r
of the bottom-side
DS(ON)
MOSFET. A single resistor programs the overcurrent and
short-circuit points. Overvoltage and undervoltage protection
is monitored at the FB voltage feedback pin.
3
) technology
November 10, 2006
FN9283.1
Features
• Wide input voltage range: +7.0V to +25.0V
• High performance R
3
technology delivers extremely fast
transient response
• +0.6V Internal Reference
- ±0.6% tolerance over the commercial temperature
Range (0°C to +70°C)
- ±1.0% tolerance over the industrial temperature range
(-40°C to +85°C)
• Output voltage range: +0.6V to V
CC
-0.3V
• Selectable forced continuous conduction mode or diode
emulation mode
• Integrated MOSFET drivers with shoot-through protection
• External type-two loop compensation
• Internal 5V low-dropout regulator with Integrated bootstrap diode
• Programmable PWM frequency: 200kHz to 600kHz
• PWM minimum frequency above audible spectrum
• Internal digital soft-start with prebiased startup capability
• Power good monitor with fault identification by PGOOD
pull down resistance
• Lossless, programmable overcurrent protection
- Uses bottom-side MOSFET’s r
DS(ON)
• Undervoltage protection, soft crowbar overvoltage
protection and over-temperature protection
• Pb-free plus anneal available (RoHS compliant)
Applications
Pinout
VIN
VCC
FCCM
EN
16 LD QFN (4mm x 4mm)
TOP VIEW
PGOOD
LX
1516 14 13
1
2
3
4
GND
6578
FB
COMP
TGATE
FSET
BOOT
12
11
10
VO
1
9
PVCC
BGATE
PGND
BSOC
• Telecom/datacom applications
• Industrial applications
• Distributed DC/DC power architecture
• Point-of-load modules
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
Copyright Intersil Americas Inc. 2006. All Rights Reserved
ISL8106
Ordering Information
PART NUMBER PART MARKING TEMP (°C) PACKAGE PKG. DWG. #
ISL8106CRZ* 8106CRZ 0 to +70 16 Ld 4x4 QFN L16.4x4
ISL8106IRZ* 8106IRZ -40 to +85 16 Ld 4x4 QFN L16.4x4
ISL8106EVAL1Z Evaluation Board
*Add “-T” suffix for tape and reel.
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.
Typical Application
V
IN
+7V TO +25V
PGOOD
PGOOD
R
PGOOD
PVCC
R
VCC
VCC
C
PVCC
C
VCC
GND
ISL8106
FCCM
EN
R
COMP
VIN
BOOT
TGATE
LX
BSOC
BGATE
PGND
CBOOT
R
BSOC
C
IN
Q
TS
L
OUT
C
OUT
Q
BS
V
OUT
COMP
FSET
C
COMP1
C
COMP2
R
BOT
FB
R
VO
R
TOP
FSET
C
FSET
2
FN9283.1
November 10, 2006
ISL8106
Absolute Voltage Ratings
BSOC, VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +28V
VCC, PGOOD to GND . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +7.0V
PVCC to PGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +7.0V
GND to PGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +0.3 V
EN, FCCM. . . . . . . . . . . . . . . . . . . . . . . . -0.3V to GND, VCC +3.3V
LX to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (DC) -0.3V to +28V
. . . . . . . . . . . . . . . . . . . . . . . . . . (<100ns Pulse Width, 10μJ) -5.0V
BOOT to GND, or PGND . . . . . . . . . . . . . . . . . . . . . . -0.3V to +33V
BOOT to LX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7V
TGATE . . . . . . . . . . . . . . . . . . . . . . .(DC) -0.3V to LX, BOOT +0.3V
. . . . . . . . . . . . . . . . . . . . . . . . . . (<200ns Pulse Width, 20μJ) -4.0V
BGATE . . . . . . . . . . . . . . . . . . . .(DC) -0.3V to PGND, PVCC +0.3V
. . . . . . . . . . . . . . . . . . . . . . . . . . . (<100ns Pulse Width, 4μJ) -2.0V
ESD Classification . . . . . . . . . . . . . . . . . . . . . .Level 1 (HBM = 2kV)
CAUTION: Stress above those listed in “Absolut e Ma ximum Rat ings ” may ca use pe rmanen t damage t o the de vi ce . Th is is a stress onl y ra tin g an d operat ion of th e device
at these or any other conditions above those indicated in the operational section of this specification is not implied.
NOTES:
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See T ech
1. θ
JA
Brief TB379.
2. For θ
3. Parameters are Guaranteed by Design.
, the “case temp” location is the center of the exposed metal pad on the package underside.
JC
Thermal Information
Thermal Resistance (Typical, Notes 1, 2) θJA (°C/W) θJC (°C/W)
QFN Package . . . . . . . . . . . . . . . . . . . 48 11.5
Junction Temperature Range . . . . . . . . . . . . . . . . . -55°C to +150°C
Operating Temperature Range
ISL8106CRZ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
ISL8106IRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature . . . . . . . . . . . . . . . . . . . . (soldering, 10s)+300°C
Recommended Operating Conditions
Ambient Temperature Range (ISL8106C) . . . . . . . . . .0°C to +70°C
Ambient Temperature Range (ISL8106I) . . . . . . . . . -40°C to +85°C
Supply Voltage (VIN to GND). . . . . . . . . . . . . . . . . . . . . . 7V to 25V
Electrical Specifications Recommended Operating Conditions, unless otherwise noted specifications in bold are valid for process,
temperature, and line operating conditions.
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
VIN
VIN Voltage Range V
VIN Input Bias Current I
VIN Shutdown Current I
VCC LDO
VCC Output Voltage Range V
VCC POR THRESHOLD
Rising VCC POR Threshold Voltage
Falling VCC POR Threshold Voltage
CONTROL INPUTS
EN High Threshold Voltage V
EN Low Threshold Voltage V
FCCM High Threshold Voltage V
FCCM Low Threshold Voltage V
EN Leakage Current
FCCM Leakage Current
REFERENCE
Reference Voltage V
Voltage Regulation Accuracy
SHDN
V
CCTHR
V
CCTHF
ENTHR
ENTHF
FCCMTHR
FCCMTHF
I
I
FCCML
I
FCCMH
V
VIN
CC
I
ENL
ENH
REF
REG
IN
EN and FCCM = 5V, FB = 0.65V, VIN = 7V to 25V 2.2 3.0 mA
EN = GND, VIN = 25V 0.1 1.0 μA
VIN = 7V to 25V, I
ISL8106CRZ 4.35 4.45 4.55 V
ISL8106IRZ 4.33 4.45 4.55 V
ISL8106CRZ 4.10 4.20 4.30 V
ISL8106IRZ 4.08 4.20 4.30 V
EN = 0V <0.1 1.0 μA
EN = 5.0V 20 μA
FCCM = 0V <0.1 1.0 μA
FCCM = 5.0V 2.0 μA
ISL8106CRZ -0.6 +0.6 %
ISL8106IRZ -1.0 +1.0 %
= 0mA to 80mA 4.75 5.00 5.25 V
LDO
7.0 25.0 V
2.0 V
0.5 V
2.0 V
1.0 V
0.6 V
4
FN9283.1
November 10, 2006
ISL8106
Electrical Specifications Recommended Operating Conditions, unless otherwise noted specifications in bold are valid for process,
temperature, and line operating conditions.
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
PWM
F
OSC
Frequency Range
Frequency-Set Accuracy
VO Range V
VO Input Leakage Current
ERROR AMPLIFIER
FB Input Bias Current I
COMP Source Current I
COMP Sink Current I
COMP High Clamp Voltage V
COMP Low Clamp Voltage V
GATE DRIVER
TGATE Pull-Up Resistance R
TGATE Source Current I
TGATE Sink Resistance R
TGATE Sink Current I
BGATE Pull-Up Resistance R
BGATE Source Current I
BGATE Sink Resistance R
BGATE Sink Current I
Delay From TGATE Falling to BGATE
Rising
Delay From BGATE Falling to TGATE
Rising
BOOTSTRAP DIODE
Forward Voltage V
Reverse Leakage I
POWER GOOD
PGOOD Pull Down Impedance
PGOOD Leakage Current I
PGOOD Maximum Sink Current 5.0 mA
F
AUDIO
VO
I
VO
FB
COMPSRC
COMPSNK
COMPHC
COMPLC
TGATEPU
TGATESRCVTGATE
TGATEPD
TGATESNKVTGATE
BGATEPU
BGATESRCVBGATE
BGATEPD
BGATESNKVBGATE
t
TGATEFBG
ATER
t
BGATEFTG
ATER
F
R
PGR
PGR
PGR
PGR
PGR
PGR
PGOOD
FCCM = 5V 200 600 kHz
FCCM = GND; ISL8106CRZ 21 28 kHz
FCCM = GND; ISL8106IRZ 20 28 kHz
F
= 300kHz; ISL8106CRZ -10 +10 %
OSC
= 300kHz; ISL8106IRZ -12 +12 %
F
OSC
0.60 3.30 V
VO = 0.60V
VO = 3.30V
FB = 0.60V ± 20 nA
FB = 0.40V, COMP = 3.20V 2.5 mA
FB = 0.80V, COMP = 0.30V 0.3 mA
FB = 0.40V, Sink 50μA 3.10 3.40 3.65 V
FB = 0.80V, Source 50μA 0.09 0.15 0.21 V
200mA Source Current (Note 3) 1.0 1.5 Ω
1.3
7.0
to LX = 2.5V 2.0 A
250mA Sink Current (Note 3) 1.0 1.5 Ω
to LX = 2.5V 2.0 A
250mA Source Current (Note 3) 1.0 1.5 Ω
to PGND = 2.5V 2.0 A
250mA Sink Current (Note 3) 0.5 0.9 Ω
to PGND = 2.5V 4.0 A
TGATE falling to BGATE rising 21 ns
BGATE falling to TGATE rising 14 ns
PVCC = 5V, IF = 2mA 0.58 V
VR = 25V 0.2 μA
SS
PGOOD = 5mA Sink; ISL8106CRZ 75 95 115 Ω
UV
SS
PGOOD = 5mA Sink; ISL8106IRZ 67 95 118 Ω
UV
PGOOD = 5mA Sink; ISL8106CRZ 50 63 78 Ω
OV
PGOOD = 5mA Sink; ISL8106IRZ 45 63 81 Ω
PGOOD = 5mA Sink; ISL8016CRZ 25 32 40 Ω
OC
PGOOD = 5mA Sink; ISL8106IRZ 22 32 43 Ω
PGOOD = 5V <0.1 1.0 μA
μA
μA
5
FN9283.1
November 10, 2006