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Data Sheet
February 4, 2009
ISL62386
FN6831.0
High-Efficiency, Quad Output System
Power Supply Controller for Notebook
Computers
The ISL62386 controller generates supply voltages for
battery-powered systems. The ISL62386 includes two
pulse-width modulation (PWM) controllers, adjustable from
0.6V to 5.5V, and two linear regulators, LDO5 and LDO3,
that generate a fixed 5V output and a fixed 3.3V output
respectively. Each can deliver up to 100mA. The Channel 2
switching regulator will automatically take over the LDO5
load when programmed to 5V output. This provides a large
power saving and boosts efficiency. The ISL62386 includes
on-board power-up sequencing, one power-good (PGOOD)
output, digital soft-start, and an internal soft-stop output
discharge that prevents negative voltages on shutdown.
The patented R3 PWM control scheme provides a low jitter
system with fast response to load transients. Light-load
efficiency is improved with period-stretching discontinuous
conduction mode (DCM) operation. To eliminate noise in
audio frequency applications, an ultrasonic DCM mode is
included, which limits the minimum switching frequency to
approximately 28kHz.
The ISL62386 is available in a 32 Ld 5x5 TQFN package,
and can operate over the extended temperature range
(-10°C to +100°C).
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP
RANGE
(°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL62386HRTZ 62386 HRTZ -10 to +100 32 Ld 5x5 TQFN L32.5x5A
ISL62386HRTZ-T* 62386 HRTZ -10 to +100 32 Ld 5x5 TQFN L32.5x5A
*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.
Features
• High Performance R3 Technology
• Fast Transient Response
• ±1% Output Voltage Accuracy: -10°C to +100°C
• Two Fully Programmable Switch-Mode Power Supplies
with Independent Operation
• Programmable Switching Frequency
• Integrated MOSFET Drivers and Bootstrap Diode
• Fixed +3.3V LDO Output with Enable Control
• Fixed +5V LDO with Automatic Switchover to SMPS2
• Internal Soft-Start and Soft-Stop Output Discharge
• Wide Input Voltage Range: +5.5V to +25V
• Full and Ultrasonic Pulse-Skipping Mode
• Power-Good Indicator
• Overvoltage, Undervoltage and Overcurrent Protection
• Thermal Monitor and Protection
• Pb-Free (RoHS Compliant)
Applications
• Notebook and Sub-Notebook Computers
• PDAs and Mobile Communication Devices
• 3-Cell and 4-Cell Li+ Battery-Powered Devices
• General Purpose Switching Buck Regulators
Pinout
ISL62386
(32 LD 5X5 TQFN)
TOP VIEW
32 31 30 29 28 27 26 25
PGOOD 1
24 BOOT2
FSET2 2
23 LGATE2
FCCM 3
22 PGND
AGND2 4
VCC 5
THERMAL PAD
(AGND)
21 LDO5
20 VIN
AGND1 6
19 LDO3
LDO3EN 7
18 LGATE1
FSET1 8
17 BOOT1
9 10 11 12 13 14 15 16
1 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. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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ISL62386
www.ADabtasSohleuette4UM.caomximum Ratings
VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +28V
VCC, PGOOD, LDO3, LDO5 to GND. . . . . . . . . . . . . -0.3V to +7.0V
EN1,2, LDO3EN . . . . . . . . . . . . . . . . . . . . -0.3V to GND, VCC + 0.3V
VOUT1,2, FB1,2, FSET1,2 . . . . . . . . . . . . -0.3V to GND, VCC + 0.3V
PHASE1,2 to GND . . . . . . . . . . . . . . . . . . . . . . . (DC) -0.3V to +28V
(<100ns Pulse Width, 10µJ) . . . . . . . . . . . . . . . . . . . . . . . . . -5.0V
BOOT1,2 to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +33V
BOOT1,2 to PHASE1,2 . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +7V
UGATE1,2 . . . . . . . . . . . (DC) -0.3V to PHASE1,2, BOOT1,2 + 0.3V
(<200ns Pulse Width, 20µJ) . . . . . . . . . . . . . . . . . . . . . . . . -4.0V
LGATE1,2 . . . . . . . . . . . . . . . . . . . . (DC) -0.3V to GND, VCC + 0.3V
(<100ns Pulse Width, 4µJ) . . . . . . . . . . . . . . . . . . . . . . . . . . -2.0V
LDO3, LDO5 Output Continuous Current . . . . . . . . . . . . . . +100mA
Thermal Information
Thermal Resistance (Typical, Notes 1, 2) θJA (°C/W) θJC (°C/W)
TQFN Package . . . . . . . . . . . . . . . . . .
32
2
Junction Temperature Range. . . . . . . . . . . . . . . . . .-55°C to +150°C
Operating Temperature Range . . . . . . . . . . . . . . . .-10°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. . . . . . . . . . . . . . . . . .-10°C to +100°C
Supply Voltage (VIN to GND). . . . . . . . . . . . . . . . . . . . . 5.5V to 25V
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. θJA 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 θJC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
These specifications apply for TA = -10°C to +100°C, unless otherwise noted. Typical values are at TA = +25°C,
VIN = 12V; 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.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN
VIN Power-on Reset (POR)
Rising Threshold
5.3 5.4 5.5
V
Hysteresis
20 80 150 mV
VIN Shutdown Supply Current
EN1 = EN2 = GND or Floating, LDO3EN = GND
-
6 15 µA
VIN Standby Supply Current
LINEAR REGULATOR
EN1 = EN2 = GND or Floating, LDO3EN = VCC
-
150 250
µA
LDO5 Output Voltage
LDO5 Short-Circuit Current (Note 3)
I_LDO5 = 0
I_LDO5 = 100mA (Note 3)
LDO5 = GND
4.9 5.0 5.1 V
4.9 5.0 5.1 V
- 190 - mA
LDO5 UVLO Threshold Voltage (Note 3)
Rising edge of LDO5
- 4.35 -
V
Falling edge of LDO5
- 4.15 -
V
SMPS2 to LDO5 Switchover Threshold
4.63 4.80 4.93
V
SMPS2 to LDO5 Switchover Resistance (Note 3) VOUT2 to LDO5, VOUT2 = 5V
LDO3 Output Voltage
I_LDO3 = 0
I_LDO3 = 100mA (Note 3)
LDO3 Short-Circuit Current (Note 3)
LDO3 = GND
-
2.5 3.2
Ω
3.25 3.3 3.35 V
3.25 3.3 3.35 V
- 180 - mA
LDO3EN Input Voltage
Rising edge
1.1 - 2.5 V
Falling edge
0.94 - 1.06 V
LDO3EN Input Leakage Current
LDO3 Discharge ON-Resistance
LDO3EN = GND or VCC
LDO3EN = GND
-1 - 1 µA
- 36 60 Ω
VCC
VCC Input Bias Current (Note 3)
VCC Start-up Voltage
PWM
EN1 = EN2 = VCC, FB1 = FB2 = 0.65V
EN1 = EN2 = LDO3EN = GND
- 2 - mA
3.45 3.6 3.75 V
2 FN6831.0
February 4, 2009

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ISL62386
www.EDlaetacSthrieceat4lUS.cpoemcifications
These specifications apply for TA = -10°C to +100°C, unless otherwise noted. Typical values are at TA = +25°C,
VIN = 12V; 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. (Continued)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Reference Voltage (Note 3)
- 0.6 - V
Regulation Accuracy
FB Input Bias Current
VOUT regulated to 0.6V
FB = 0.6V
-1 - 1 %
-10 - 30 nA
Frequency Range
200 - 600 kHz
Frequency Set Accuracy (Note 4)
VOUT Voltage Regulation Range
VOUT Soft-Discharge Resistance
FSW = 300kHz
VIN > 6V for VOUT = 5.5V
-12 - 12 %
0.6 - 5.5 V
- 14 50 Ω
POWER-GOOD
PGOOD Pull-Down Impedance
(Note 3)
- 32 50 Ω
PGOOD Leakage Current
Maximum PGOOD Sink Current (Note 3)
PGOOD = VCC
- 0 1 µA
- 5 - mA
PGOOD Soft-start Delay
From EN1(2) = High, then from EN2(1) High to
PGOOD High
2.20
2.75 3.70
ms
From EN1(2) = Floating, then from EN2(1) High
to PGOOD High
4.50
5.60 7.50
ms
GATE DRIVER
UGATE Pull-Up ON-Resistance (Note 3)
200mA source current
-
1.0 1.5
Ω
UGATE Source Current (Note 3)
UGATE-PHASE = 2.5V
- 2.0 - A
UGATE Pull-Down ON-Resistance (Note 3)
250mA source current
-
1.0 1.5
Ω
UGATE Sink Current (Note 3)
UGATE-PHASE = 2.5V
- 2.0 - A
LGATE Pull-Up ON-Resistance (Note 3)
250mA source current
-
1.0 1.5
Ω
LGATE Source Current (Note 3)
LGATE-PGND = 2.5V
- 2.0 - A
LGATE Pull-Down ON-Resistance (Note 3)
250mA source current
-
0.5 0.9
Ω
LGATE Sink Current (Note 3)
LGATE-PGND = 2.5V
- 4.0 - A
UGATE to LGATE Deadtime (Note 3)
UG falling to LG rising, no load
- 21 - ns
LGATE to UGATE Deadtime (Note 3)
LG falling to UG rising, no load
- 21 - ns
Bootstrap Diode Forward Voltage (Note 3)
2mA forward diode current
- 0.58 -
V
Bootstrap Diode Reverse Leakage Current
CONTROL
VR = 25V
- 0.2 1 µA
FCCM Input Voltage
Low level (DCM enabled)
- - 0.8 V
Float level (DCM with audio filter)
1.9 - 2.1 V
High level (Forced CCM)
2.4 -
-V
FCCM Input Leakage Current
Audio Filter Switching Frequency (Note 3)
FCCM = GND or VCC
FCCM floating
-2 - 2 µA
- 28 - kHz
EN Input Voltage
Clear fault level/SMPS OFF level
- - 0.8 V
Delay start level
1.9 - 2.1 V
SMPS ON level
2.4 - - V
EN Input Leakage Current
ISEN Input Impedance (Note 3)
EN = GND or VCC
EN = VCC
-3.5 - 3.5 µA
- 600 - kΩ
3 FN6831.0
February 4, 2009

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ISL62386
www.EDlaetacSthrieceat4lUS.cpoemcifications
These specifications apply for TA = -10°C to +100°C, unless otherwise noted. Typical values are at TA = +25°C,
VIN = 12V; 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. (Continued)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
ISEN Input Leakage Current (Note 3)
EN = GND
- 0.1 - µA
PROTECTION
OCSET Input Impedance (Note 3)
OCSET Input Leakage Current (Note 3)
EN = VCC
EN = GND
- 600 - kΩ
- 0.1 - µA
OCSET Current Source
OCP (VOCSET-VISEN) Threshold
UVP Threshold
EN = VCC
Falling edge, referenced to FB
9
-1.75
81
10.0 10.5
0.0 1.75
84 87
µA
mV
%
OVP Threshold
Rising edge, referenced to FB
113 116 120 %
Falling edge, referenced to FB
99.5 103 106
%
OTP Threshold (Note 3)
Rising edge
- 150 - °C
Falling edge
- 135 - °C
NOTES:
3. Limits established by characterization and are not production tested.
4. FSW accuracy reflects IC tolerance only; it does not include frequency variation due to VIN, VOUT, LOUT, ESRCOUT, or other application specific
parameters.
4 FN6831.0
February 4, 2009

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ISL62386
www.TDaytapSihceaetl4UA.cpomplication Circuits The following typical application circuits generate the 5V/8A and 3.3V/8A main supplies in a
notebook computer. The input supply (VBAT) range is 5.5V to 25V.
VBAT
4x10µF
3 .3 V
0.22µF
4.7µH
IRF7821
330µF
750
1200pF
45.3k
0.022µF 14k
IRF7832
14k
B O O T1
V IN
BOOT2
UGATE1
PHASE1
UGATE2
PHASE2
LGATE1
LGATE2
ISL62386
OCSET1
IS E N 1
VOUT1
OCSET2
IS E N 2
VOUT2
IRF7821
0.22µF
4.7µH
14k 0.022µF
IRF7832
14k
5V
330µF
750
68.1k 1200pF
FB1
FB2
10k A G N D 1
9.09k
AGND2
3 .3 V
4.7µF
5V
LDO3
LDO5
PGOOD
EN1
100k
LDO5
4.7µF
EN2
LD O 3EN
VCC
1µF
PGND
FCCM
FSET1
FSET2
24.3k
0.01µF
A G N D 1 /2
19.6k
0.01µF
AGND2
AGND1
FIGURE 1. TYPICAL APPLICATION CIRCUIT WITH INDUCTOR DCR CURRENT SENSE
VBAT
4x10µF
3 .3 V
330µF
0.001
1k
0.22µF
4.7µH
1k
750
1200pF 45.3k
BOOT1
IRF7821
UGATE1
PHASE1
IRF7832
LGATE1
V IN
BOOT2
IRF7821
UGATE2
PHASE2
IRF7832
LGATE2
ISL62386
OCSET1
IS E N 1
VOUT1
OCSET2
IS E N 2
VOUT2
0.22µF
4.7µH
0.001
1k 1k
5V
330µF
750
68.1k
1200pF
FB1
FB2
AGND1
10k 3 .3 V
AGND2
LDO3
9.09k
4.7µF
5V
LDO5
PGOOD
EN1
100k
LDO5
4.7µF
EN2
LDO3EN
VCC
1µF
PGND
FCCM
FSET1
FSET2
24.3k
0.01µF
19.6k
0.01µF
A G N D 1 /2
AGND2
AGND1
FIGURE 2. TYPICAL APPLICATION CIRCUIT WITH RESISTOR CURRENT SENSE
5 FN6831.0
February 4, 2009