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参数资料
| 型号： | ISL9443IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 1/23页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 32-QFN |
| 标准包装： | 6,000 |
| PWM 型： | 电流模式 |
| 输出数： | 3 |
| 频率 - 最大： | 1.32MHz |
| 电源电压： | 4.5 V ~ 26 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | * |
| 包装： | * |
Triple, 180° Out-of-Phase, Synchronous Step-Down
PWM Controller
ISL9443
The ISL9443 is a triple-output synchronous buck controller that
integrates three PWM controllers which are fully 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 0.7V. The PWMs are synchronized at 180°
out-of-phase, thus reducing the input RMS current and ripple
voltage.
The ISL9443 offers programmable soft-start and tracking
functions for ease of supply rail sequencing and integrated
UV/OV/OC/OT protections in a space conscious 5mmx5mm QFN
package.
Switching frequency can be set between 200kHz and 1200kHz
using a resistor. The ISL9443 can be synchronized to an external
clock to reduce beat frequencies.
The ISL9443 utilizes internal loop compensation to keep
minimum peripheral components for a compact design and a
low total solution cost. The controller is implemented with
current mode control with feed forward to cover various
applications even with fixed internal compensation.
Related Literature
? Technical Brief TB389 “PCB Land Pattern Design and Surface
Mount Guidelines for QFN (MLFP) Packages”
Features
? Three Integrated Synchronous Buck PWM Controllers
- Internal Bootstrap Diodes
- Independent Programmable Output Voltage
- Independent Soft-Starting and Tracking
? Power-Good Indicator
? Light Load Efficiency Enhancement
- Low Ripple Diode Emulation Mode with Pulse Skipping
? Supports Pre-Biased Output
? Programmable Frequency: 200kHz to 1200kHz
? Adaptive Shoot-Through Protection
? Out-of-Phase Switching (0°/180°/0°)
? No External Current Sense Resistor
- Uses Lower MOSFET’s r DS(ON)
? Complete Protection
- Overcurrent, Overvoltage, Over-Temperature
? Wide Input Voltage Range: 4.5V to 28V
? Pb-Free (RoHS Compliant)
Applications
? VoX Gateway Devices
? NAS/SAN Devices
? ATX power supplies
+12V
+
CIN1
CIN2
Q1
0.1μF
0.1μF
Q2
L2
2.2μH
VOUT2
+3.3V,6A
+
CO2
CO1
VOUT1
+1.0V, 6A
+
100μF
R4
15.8k ?
L1
1.0μH
RESN1
1.3k ?
+12V
C1
4.7μF
ISEN1
VIN
VCC_5V
EN23
CB1
ISL9443
CB2
ISEN2
FB2
UGATE3
BOOT3
PHASE3
CB3
0.1μF
RESN2
1.3k ?
+12V
Q3
R9
11.5k ?
R8
3.09k ?
L3
3.3μH
100μF
VOUT3
+5.0V,6A
R3
31.6k ?
RT
49.9k ?
CSS
10nF
FB1
RT
EN/SS1
R5
100k ?
R6
200k ?
R7
200k ?
LGATE3
ISEN3
RESN3
1.3k ?
R4
10.7k ?
R3
1.74k ?
+
CO3
100μF
FIGURE 1. TYPICAL APPLICATION
February 24, 2012
FN7663.1
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 Inc. 2011, 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL9443IRZ-T7A | 功能描述:软开关 PWM 控制器 ISL9443 TRIPLE STEP CONTRLR IMVP-6. 32LD RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| ISL9443IRZ-T7AS2750 | 制造商:Intersil Corporation 功能描述:ISL9443 TRIPLE, STEP- DOWN PWM CONTROLLER IMVP-6. 32 LD MLFP - Tape and Reel |
| ISL9443IRZ-TS2750 | 制造商:Intersil Corporation 功能描述:PB FREE. ISL9443 TRIPLE, STEP- DOWN PWM CONTROLLER IMVP-6. 3 - Tape and Reel |
| ISL9444CRZ | 制造商:Intersil Corporation 功能描述:PB FREE. ISL9444 TRIPLE, STEP- DOWN PWM CONTROLLER IMVP-6. 4 - Rail/Tube 制造商:Intersil Corporation 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN 制造商:Intersil 功能描述:Pb Free. ISL9444 Tri ple, Step- Down PWM |
| ISL9444CRZ-T | 制造商:Intersil Corporation 功能描述:PB FREE. ISL9444 TRIPLE, STEP- DOWN PWM CONTROLLER IMVP-6. 4 - Tape and Reel 制造商:Intersil Corporation 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN 制造商:Intersil 功能描述:Pb Free. ISL9444 Tri ple, Step- Down PWM |
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