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ISL9440 の電気的特性と機能

ISL9440のメーカーはIntersil Corporationです、この部品の機能は「(ISL9440 / ISL9441) Step-Down PWM and Single Linear Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL9440
部品説明 (ISL9440 / ISL9441) Step-Down PWM and Single Linear Controller
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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ISL9440 Datasheet, ISL9440 PDF,ピン配置, 機能
®
Data Sheet
ISL9440, ISL9440A, ISL9441
December 5, 2007
FN6383.1
Triple, 180° Out-of-Phase, Step-Down
PWM and Single Linear Controller
www.TdahteasIhSeLe9t44u4.0c,oImSL9440A and ISL9441 are quad-output
synchronous buck controllers that integrate 3 PWM
controllers and 1 low drop-out linear regulator controller, which
are full featured and designed to provide multi-rail power for
use in products such as cable and satellite set-top boxes,
VoIP gateways, cable modems, and other home connectivity
products as well as a variety of industrial and general purpose
applications. Each output is adjustable down to 0.8V. The
PWMs are synchronized at 180° out of phase thus reducing
the RMS input current and ripple voltage.
The ISL9440, ISL9440A and ISL9441 offer internal soft-start,
independent enable inputs for ease of supply rail
sequencing, and integrated UV/OV/OC/OT protections in a
space conscious 5mmx5mm QFN package. The ISL9440
and ISL9440A offer an early warning function to output a
logic signal to warn the system to back up data when input
voltage falls below a certain level.
The ISL9440, ISL9440A and ISL9441 utilize internal loop
compensation to keep minimum peripheral components for
compact design and a low total solution cost. These devices
are implemented with current mode control with feed forward
to cover various applications even with fixed internal
compensations.
The table below shows the difference in terms of ISL9440,
ISL9440A and ISL9441 features.
PART
NUMBER
ISL9440
ISL9440A
ISL9441
EARLY
WARNING
YES
YES
NO
SWITCHING FREQUENCY
(kHz)
300
600
300
Features
• Three Integrated Synchronous Buck PWM Controllers
- Internal Bootstrap Diodes
- Internal Compensation
- Internal Soft-Start
• Independent Control for Each Regulator and
Programmable Output Voltages; Independent
Enable/Shutdown
• Fixed Switching Frequency: 300kHz (ISL9440, ISL9441);
600kHz (ISL9440A)
• Adaptive Shoot Through Protection on all Synchronous
Buck Controllers
• Independently Programmable Voltage Outputs
• Out-of-Phase Switching to Reduce Input Capacitance
(0°/180°/0°)
• No External Current Sense Resistor
- Uses Lower MOSFET’s rDS(ON)
• Current Mode Controller with Voltage Feed Forward
• Complete Protection
- Overcurrent, Overvoltage, Undervoltage Lockout,
Over-Temperature
• Cycle by Cycle Current Limiting
• Wide Input Voltage Range
- Input Rail Powers VIN Pin: 5.6V to 24V
- Input Rail Powers VCC_5V Pin (VIN tied to VCC_5V, for
5V input applications): 4.5V to 5.6V
• Early Warning (ISL9440, ISL9440A) on Input Voltage
Failure
• Integrated Reset Function (ISL9440, ISL9440A)
• Pb-free (RoHS compliant)
Applications
• Satellite and Cable Set-Top Boxes
• Cable Modems
• VoX Gateway Devices
• NAS/SAN Devices
Related Literature
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN (MLFP) Packages”
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. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

1 Page





ISL9440 pdf, ピン配列
Block Diagram
BOOT1
UGATE1
PHASE1
VCC_5V
LGATE1
VCC_5V
ADAPTIVE DEAD-TIME
V/I SAMPLE TIMING
PGOOD RST
PGND
0.8V REFERENCE
G4
+
VE +
gm*VE
-
FB4
VCC_5V VIN PGND
EN1 EN2 EN3
POR
ENABLE
BIAS SUPPLIES
REFERENCE
FAULT LATCH
SOFT-START
EARLY WARNING
(see note 6)
VCC_5V
ADAPTIVE DEAD-TIME
V/I SAMPLE TIMING
VCC_5V
PGND
ADAPTIVE DEAD-TIME
V/I SAMPLE TIMING
1400kΩ
18.5pF
OCP
PGOOD
FB1
180kΩ
-
+
16kΩ
-
PWM1
OC1 OC2 OC3
UV/OV
UV
+ 0.8V
REF
ERROR AMP 1
+
FB1 FB2 FB3 FB4 VIN
ISEN1
OCSET1
CURRENT
SAMPLE
-
+ CURRENT
SAMPLE
+
1.75V REFERENCE
DUTY CYCLE RAMP GENERATOR
PWM CHANNEL PHASE CONTROL
CHANNEL 1
-
OC1
+ SAME STATE FOR
2 CLOCK CYCLES
REQUIRED TO LATCH VIN SGND VCC_5V
OVERCURRENT FAULT
PWM3
OC3
PWM2
OC2
PGND
CHANNEL 3
CHANNEL 2
BOOT2
UGATE2
PHASE2
VCC_5V
LGATE2
BOOT3
UGATE3
PHASE3
VCC_5V
LGATE3
FB3
ISEN3
OCSET3
FB2
ISEN2
OCSET2


3Pages


ISL9440 電子部品, 半導体
ISL9440, ISL9440A, ISL9441
Absolute Maximum Ratings
VCC_5V to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V
VCC_5V Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +28V
BOOT/UGATE to PHASE . . . . . . . . . . . . . -0.3V to VCC_5V + 0.3V
PHASE1,2,3 and ISEN1, 2,3, to GND
. . . . . . . . . . . . . . . . . . . . .-5V (<100ns, 10µJ)/-0.3V (DC) to +28V
www.ELdDaNtO1a,sFEhBNe,2eO,t4CEuNS.cE3o,TmF1B, O1,CFSBE2T, 2F,BO3C, tSoEGTN3,D . . -0.3V to VCC_5V + 0.3V
LGATE1, LGATE2, LGATE3, to GND. . . -0.3V to VCC_5V + 0.3V
PGOOD, RST, G4 to GND . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2000V
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200V
Thermal Information
Thermal Resistance (Typical)
θJA(oC/W) θJC(oC/W)
32 Ld QFN Package (Note 1). . . . . . . .
34
3.5
Maximum Junction Temperature . . . . . . . . . . . . . . .-55°C to +150°C
Maximum Operating Temperature . . . . . . . . . . . . . . .-40°C to +85°C
Maximum Storage Temperature. . . . . . . . . . . . . . . .-65°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
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.
NOTE:
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.
Electrical Specifications
Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application
Schematic. VIN = 5.6V to 24V, or VCC_5V = 5V ±10%, C_VCC_5V = 4.7µF, TA = -40°C to +85°C (Note 5),
Typical values are at TA = +25°C, unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
VIN SUPPLY
Input Voltage Range
5.6 12.0 24.0
V
Input Voltage Range
VCC_5V SUPPLY (Note 2)
VIN = VCC_5V (Note 6)
4.5 5.0 5.6
V
Operation Voltage
4.5 5.0 5.6
V
Internal LDO Output Voltage
Maximum Supply Current of Internal LDO
VIN SUPPLY CURRENT
Shutdown Current (Note 3)
Operating Current (Note 4)
VIN > 5.6V, IL = 60mA
VIN = 12V
EN = EN2 = EN3 = 0, VIN =12V
4.5 5.0 5.5
V
60 mA
50 100 µA
3 5 mA
REFERENCE SECTION
Internal Reference Voltage
Across specified temperature range
0.8
V
Reference Voltage Accuracy
Across specified temperature range
-1
+1 %
PWM CONTROLLER ERROR AMPLIFIERS
DC Gain (Note 5)
88 dB
Gain-BW Product (Note 5)
15 MHz
Slew Rate (Note 5)
2.0 V/µs
PWM REGULATOR
Switching Frequency (ISL9440, ISL9441)
260 300 340 kHz
Maximum Duty Cycle (ISL9440, ISL9441)
93 %
Minimum Duty Cycle (ISL9440, ISL9441)
3%
Switching Frequency (ISL9440A)
522 600 678 kHz
Maximum Duty Cycle (ISL9440A)
86 %
6 FN6383.1
December 5, 2007

6 Page



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共有リンク

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部品番号部品説明メーカ
ISL9440

(ISL9440 / ISL9441) Step-Down PWM and Single Linear Controller

Intersil Corporation
Intersil Corporation
ISL9440A

(ISL9440 / ISL9441) Step-Down PWM and Single Linear Controller

Intersil Corporation
Intersil Corporation
ISL9440B

Triple Step-Down PWM and Single Linear Controller

Intersil Corporation
Intersil Corporation
ISL9440C

Triple Step-Down PWM and Single Linear Controller

Intersil Corporation
Intersil Corporation


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