DATASHEET
High-Performance Notebook PWM Controller
ISL6269A
The ISL6269A IC is a Single-phase Synchronous-Buck PWM
controller featuring Intersil's Robust Ripple Regulator R3™
Technology that delivers truly superior dynamic response to
input voltage and output load transients. Integrated MOSFET
drivers and bootstrap diode result in fewer components and
smaller implementation area.
Intersil’s R3™ Technology combines the best features of
fixed-frequency PWM and hysteretic PWM while eliminating
many of their shortcomings. R3™ 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 ISL6269A has an error amplifier that
provides ±1% voltage regulation at the FB pin.
The ISL6269A has a 1.5ms digital soft-start and can be
started into a prebiased output voltage. A resistor divider is
used to program the output voltage setpoint. The ISL6269A
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 R3™ Technology
• Fast transient response
• ±1% regulation accuracy: -10°C to +100°C and
-40°C to +100°C
• Wide input voltage range: +5.0V 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
• Prebiased output start-up capability
• Integrated MOSFET drivers and bootstrap diode
• Internal digital soft-start
• Power good monitor
• 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
November 18, 2014
FN9253.3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Copyright Intersil Americas LLC 2005-2007, 2014. All Rights Reserved
Intersil (and design) and R3 Technology are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
ISL6269A
Pin Configuration
ISL6269A
(16 LD 4x4 QFN)
TOP VIEW
PGOOD
PHASE
BOOT
13
12 PVCC
11 LG
GND
FCCM
EN
3
4
5
COMP
6
FB
7
FSET
8
VO
10 PGND
9
ISEN
UG
14
16
VIN
VCC
1
2
15
Ordering Information
PART NUMBER
(Notes
1, 2, 3)
ISL6269ACRZ
ISL6269AIRZ
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to
TB347
for details on reel specifications.
2. 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.
3. For Moisture Sensitivity Level (MSL), please see product information page for
ISL6269A.
For more information on MSL, please see tech brief
TB363.
PART MARKING
62 69ACRZ
62 69AIRZ
TEMP RANGE
(°C)
-10 to +100
-40 to +100
PACKAGE
(RoHS Compliant)
16 Ld 4x4 QFN
16 Ld 4x4 QFN
PKG. DWG. #
L16.4x4
L16.4x4
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Block Diagram
VIN
VO
GND
PACKAGE BOTTOM
PWM FREQUENCY
CONTROL
V
REF
+
g
m
V
IN
-
+
V
W
-
+
R
-
OVP
+
g
m
V
O
-
-
UVP
+
+
C
R
-
V
COMP
+
-
V
R
S
+
PWM
Q
-
FSET
FB
COMP
ISEN
PWM CONTROL
PGOOD
+
I
OC
-
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VCC
3
EN
+
EA
POR
DIGITAL SOFT-START
-
OCP
30W
90W
60W
150°OT
FN9253.3
November 18, 2014
ISL6269A
BOOT
DRIVER
UG
PHASE
SHOOT THROUGH
PROTECTION
PVCC
DRIVER
LG
PGND
FCCM
FIGURE 1. SCHEMATIC BLOCK DIAGRAM
ISL6269A
Typical Application
ISL6269A
V
IN
5V TO 25V
PGOOD
VIN
R
PGOOD
C
IN
5V
PVCC
UG
Q
HIGH_SIDE
R
VCC
VCC
BOOT
C
PVCC
C
VCC
C
BOOT
GND
PHASE
L
OUT
V
OUT
0.6V TO 3.3V
R
SEN
FCCM
C
OUT
ISEN
Q
LOW_SIDE
EN
LG
R
COMP
COMP
PGND
C
COMP1
FB
VO
C
COMP2
FSET
R
FSET
C
FSET
R
BOTTOM
R
TOP
FIGURE 2. ISL6269A TYPICAL APPLICATION SCHEMATIC
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ISL6269A
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 4, 5)
JA
(°C/W)
JC
(°C/W)
QFN Package . . . . . . . . . . . . . . . . . . . . . . . .
48
11.5
Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . -55C to +150C
Operating Temperature Range
ISL6269ACRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C
ISL6269AIRZ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to +150C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see
TB493
Recommended Operating Conditions
Ambient Temperature Range
ISL6269ACRZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-10°C to +100°C
ISL6269AIRZ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Supply Voltage (VIN to GND) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 25V
VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V ±5%
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:
4.
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.
5. For
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
PARAMETER
VIN
VIN Input Bias Current
These specifications apply for V
IN
= 15V, T
A
= -40°C to +100°C, unless otherwise stated. All typical
specifications T
A
= +25°C, VCC = 5V, PVCC = 5V, V
IN
= 15V
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
I
VIN
I
VIN_SHDN
I
VCC
I
VCC_SHDN
I
PVCC_SHDN
V
VCC_THR
V
EN = 5V, VIN = 5V
EN = 5V, VIN = 25V
-
-
-
6.5
26
0.1
10
35
1.0
µA
µA
µA
VIN Shutdown Current
VCC and PVCC
VCC Input Bias Current
VCC Shutdown Current
PVCC Shutdown Current
VCC POR THRESHOLD
Rising VCC POR Threshold Voltage
EN = GND, VIN = 25V
EN = 5V, FCCM = GND, FB = 0.65V
EN = GND, VCC = 5V
EN = GND, PVCC = 5V
-
-
-
1.7
0.1
0.1
2.5
1.0
1.0
mA
µA
µA
T
A
= -10°C to +100°C
T
A
= -10°C to +100°C
4.35
4.33
4.45
4.45
4.20
4.20
4.55
4.55
4.30
4.30
V
V
V
V
Falling VCC POR Threshold Voltage
VCC_THF
4.10
4.08
REGULATION
Reference Voltage
Regulation Accuracy
PWM
Frequency Range
Frequency-set Accuracy
VO Range
VO Input Leakage
V
VO
I
VO
VO = 0.60V
VO = 3.30V
f
SW
FCCM = 5V
f
SW
= 300kHz
200
-12
0.60
-
-
-
-
-
1.3
7.0
600
+12
3.30
-
-
kHz
%
V
µA
µA
V
REF
FB connected to COMP
-
-1
0.6
-
-
+1
V
%
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