®
ISL6269
Data Sheet
June 25, 2009
FN9177.3
High-Performance Notebook PWM
Controller with Bias Regulator and
Audio-Frequency Clamp
The ISL6269 IC is a Single-Phase Synchronous-Buck PWM
controller featuring Intersil's Robust Ripple Regulator (R
3
)
technology that delivers truly superior 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.
Intersil’s R
3
technology combines the best features of fixed-
frequency PWM and hysteretic PWM while eliminating many
of their shortcomings. R
3
technology employs an innovative
modulator that synthesizes an AC ripple voltage signal V
R
,
analogous to the output inductor ripple current. The AC signal
V
R
enters a window comparator where the lower threshold is
the error amplifier output V
COMP
, and the upper threshold is a
programmable voltage reference V
W,
resulting in generation
of the PWM signal. The voltage reference V
W
sets the steady
state PWM frequency. Both edges of the PWM can be
modulated in response to input voltage transients and output
load transients, much faster than conventional fixed frequency
PWM controllers. Unlike a conventional hysteretic converter,
the ISL6269 has an error amplifier that provides ±1% voltage
regulation at the FB pin.
The ISL6269 has 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 ISL6269 can be
configured to operate in continuous-conduction-mode (CCM)
or diode-emulation-mode (DEM), which improves light-load
efficiency. In CCM the controller always operates as a
synchronous rectifier however, when DEM is enabled the
low-side MOSFET is permitted to stay off, blocking negative
current flow into the low-side MOSFET from the output
inductor.
Features
• High performance R
3
technology
• 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)
• Wide input voltage range: +7.0V to +25.0V
• Output voltage range: +0.6V to +3.3V
• Wide output load range: 0A to 25A
• Selectable diode emulation mode for increased light load
efficiency
• Programmable PWM frequency: 200kHz to 600kHz
• Pre-biased output start-up capability
• Internal 5V LDO for self-biasing
• Integrated MOSFET drivers and bootstrap diode
• Internal digital soft-start
• Power good monitor
• PWM minimum frequency above audible spectrum
• Fault protection
- Undervoltage protection
- Soft crowbar overvoltage protection
- Low-side MOSFET r
DS(ON)
overcurrent protection
- Over-temperature protection
- Fault identification by PGOOD pull-down resistance
• Pb-free (RoHS compliant)
Applications
• PCI express graphical processing unit
• Auxiliary power rail
• VRM
• Network adapter
Pinout
ISL6269
(16 LD 4x4 QFN)
TOP VIEW
PGOOD
PHASE
BOOT
Ordering Information
PART
NUMBER
(Note)
12
PVCC
16
VIN
VCC
FCCM
EN
1
2
3
4
5
COMP
15
14
13
PART
MARKING
62 69IRZ
TEMP
RANGE
(°C)
UG
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL6269CRZ*
ISL6269IRZ*
62 69CRZ -10 to +100 16 Ld 4x4 QFN L16.4x4
-40 to +100 16 Ld 4x4 QFN L16.4x4
GND
11
LG
10
PGND
9
ISEN
*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.
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.
Copyright Intersil Americas Inc. 2006, 2007, 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
6
FB
7
FSET
8
VO
1
ISL6269
Absolute Voltage Ratings
ISEN, 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 +0.3V
EN, FCCM . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to GND, VCC +3.3V
VO, FB, COMP, FSET . . . . . . . . . . . . . . . -0.3V to GND, VCC +0.3V
PHASE to GND (DC) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +28V
(<100ns Pulse Width, 10µJ) . . . . . . . . . . . . . . . . . . . . . . . . . -5.0V
BOOT to GND, or PGND . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +33V
BOOT to PHASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7V
UG (DC) . . . . . . . . . . . . . . . . . . . . . . .-0.3V to PHASE, BOOT +0.3V
(<200ns Pulse Width, 20µJ) . . . . . . . . . . . . . . . . . . . . . . . . -4.0V
LG (DC) . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to PGND, PVCC +0.3V
(<100ns Pulse Width, 4µJ) . . . . . . . . . . . . . . . . . . . . . . . . . . -2.0V
Thermal Information
Thermal Resistance (Typical, Notes 1, 2)
θ
JA
(°C/W)
θ
JC
(°C/W)
QFN Package. . . . . . . . . . . . . . . . . . . .
48
11.5
Junction Temperature Range. . . . . . . . . . . . . . . . . .-55°C to +150°C
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ISL6269CRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C
ISL6269IRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Ambient Temperature Range
ISL6269CRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C
ISL6269IRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Supply Voltage (VIN to GND) . . . . . . . . . . . . . . . . . . . . . . 7V to 25V
PVCC to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V ±5%
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
1.
θ
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2. For
θ
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
These specifications apply for T
A
= -40°C to +100°C, unless otherwise stated. All typical specifications T
A
= +25°C,
PVCC = 5V, VIN = 15V. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise
specified. Temperature limits established by characterization and are not production tested.
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PARAMETER
VIN
VIN Input Voltage Range
VIN Input Bias Current
VIN Shutdown Current
VCC LDO
VCC Output Voltage Range
Rising VCC POR Threshold Voltage
V
VIN
I
VIN
EN = 5V, VIN = 25V
7.0
-
-
-
2.2
0.1
25
3.0
1.0
V
mA
µA
I
VIN_SHDN
EN = GND, VIN= 25V
V
VCC
VIN = 7V to 25V, IVCC = 0mA to 80mA
4.75
4.35
4.33
5.00
4.45
4.45
4.20
4.20
5.25
4.55
4.55
4.30
4.30
V
V
V
V
V
V
VCC_THR
T
A
= -10°C to +100°C
V
Falling VCC POR Threshold Voltage
VCC_THF
T
A
= -10°C to +100°C
4.10
4.08
PVCC
PVCC Shutdown Current
REGULATION
Reference Voltage
Voltage Regulation Accuracy
V
REF
V
REG
I
PVCC_SHDN
EN = GND, PVCC = 5V
-
0.1
1.0
µA
-
FB connected to COMP, T
A
= -10°C to +100°C
FB connected to COMP, T
A
= -40°C to +100°C
-0.6
-1.0
0.6
-
-
-
+0.6
+1.0
V
%
%
PWM
Frequency Range
f
SW
f
AUDIO
FCCM = 5V
FCCM = GND, T
A
= -10°C to +100°C
FCCM to GND
Frequency-Set Accuracy
VO Range
V
VO
f
SW
= 300kHz
200
19
18
-12
0.60
-
28
28
-
-
600
-
-
+12
3.30
kHz
kHz
kHz
%
V
4
FN9177.3
June 25, 2009
RF/Wirelessly
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