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| 型号： | ISL78322ARZ-T |
| 厂商： | Intersil |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 12-DFN |
| 标准包装： | 6,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.8 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 2A，1.7A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-VFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 12-DFN（4x3） |
Dual 2A/1.7A Low Quiescent Current 2.25MHz High
Efficiency Synchronous Buck Regulator
ISL78322
The ISL78322 is a high efficiency, dual synchronous step-down
DC/DC regulator that can deliver up to 2A/1.7A continuous
output current per channel. The channels are 180° out-of-phase
for input RMS current and EMI reduction. The supply voltage
range of 2.8V to 5.5V allows for the use of a single Li+ cell, three
NiMH cells or a regulated 5V input. The current mode control
architecture enables very low duty cycle operation at high
frequency with fast transient response and excellent loop
stability. The ISL78322 operates at 2.25MHz switching frequency
which allows for the use of small, low cost inductors and
capacitors. Each channel is optimized for generating an output
voltage as low as 0.6V.
The ISL78322 has a user configurable mode of operation-forced
PWM mode and PFM/PWM mode. The forced PWM mode
reduces noise and RF interference while the PFM mode provides
highest efficiency by reducing switching losses at light loads. In
PFM mode of operation, both channels draw a total quiescent
current of only 40μA, hence enabling high light load efficiency
and maximizing battery life.
The ISL78322 offers a 1ms Power-Good (PG) signal to monitor
both outputs at power-up. When shutdown, ISL78322 discharges
the output capacitors. Other features include internal digital
soft-start, enable for power sequence, overcurrent protection,
and thermal shutdown. The ISL78322 is offered in a 4mmx3mm,
12 Lead DFN package with 1mm maximum height. The
complete converter occupies less than 1.8cm 2 area.
The ISL78322 is qualified to AEC Q100 and specified for
operation over the -40°C to +105°C (grade 2) ambient
temperature range.
100
90
80
Features
? Dual 2A/1.7A High Efficiency Synchronous Buck Regulator
with up to 97% Efficiency, Low Iq (40μA)
? 180° Out-of-Phase Outputs Reduce Ripple Current and EMI
? Start-up with Pre-biased Output Prevents Negative Current
Flow in Output Stage
? Selectable Forced PWM Mode and PFM Mode
? External Synchronization up to 8MHz
? Negative Current Detection and Protection
? 100% Maximum Duty Cycle for Lowest Dropout
? Internal Current Mode Compensation
? Peak Current Limiting, Hiccup Mode Short Circuit Protection
and Over-Temperature Protection
? Pb-free (RoHs Compliant)
? AEC Q100 Qualified Component
Applications
? DC/DC POL Modules
? μC/μP, FPGA and DSP Power
? Automotive Embedded Processor Power Supply Systems
2.5VOUT1PFM
70
60
50
2.5VOUT1PWM
3.3VOUT2 PWM
3.3VOUT2PFM
2.25MHz 5VIN AT +25°C
40
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
OUTPUT LOAD (A)
FIGURE 1. CHARACTERISTIC CURVE
January 14, 2014
FN7908.1
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 LLC 2012, 2014. 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 |
|---|---|
| ISL78322ARZ-TR5303 | 制造商:Intersil Corporation 功能描述: |
| ISL78419 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Integrated Automotive TFT-LCD Power Supply Regulator |
| ISL78419ARZ | 功能描述:其他电源管理 TFT-LCD POWER SUPPLY AUTOMOTIVE RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| ISL78419ARZ-T | 制造商:Intersil Corporation 功能描述:ISL78419ARZ INTEGRATED AUTOMOTIVE TFT-LCD POWER SUPPLY REGUL - Tape and Reel 制造商:Intersil Corporation 功能描述:IC TFT-LCD PS REGULATOR 28QFN 制造商:Intersil 功能描述:TFT-LCD POWER SUPPLY AUTOMOTIVE |
| ISL78420 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:100V, 2A Peak, Half-Bridge Driver with Tri-Level PWM Input and Adjustable Dead-Time |
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