intersil ISL8106 DATA SHEET

®
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
Block Diagram
VIN
GND
VCC
3
EN
PACKAGE BOTT OM
V
REF
OVP
+
UVP
+
LDO
+
+
gmV
gmV
PWM FREQUENCY
CONTROL
+
IN
V
W
− +
R
PWM
V
R
O
+
C
R
V
COMP
+
Q
S
VO
FSET
ISL8106
BOOT
+
EA
FB
EA
POR
DRIVER
DIGITAL SOFT-START
TGATE
COMP
BSOC
November 10, 2006
PGOOD
FN9283.1
I
OC
OCP
+
30Ω
90Ω
60Ω
150°OT
PWM CONTROL
SHOOT THROUGH
PROTECTION
DRIVER
LX
PVCC
BGATE
PGND
FCCM
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
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