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ISL78234AARZ

更新时间： 2024-02-11 11:13:08
品牌 Logo 应用领域
瑞萨 - RENESAS /
页数 文件大小 规格书
21页 2210K
描述
4A Compact Synchronous Buck Regulator; TQFN16, WFQFN16; Temp Range: -40° to 125°C

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ISL78234AARZ 技术参数

生命周期：Unknown零件包装代码：TQFN, WFQFN
针数：16, 16Reach Compliance Code：compliant
Factory Lead Time：17 weeks风险等级：5.69
Base Number Matches：1

ISL78234AARZ 数据手册

 浏览型号ISL78234AARZ的Datasheet PDF文件第2页浏览型号ISL78234AARZ的Datasheet PDF文件第3页浏览型号ISL78234AARZ的Datasheet PDF文件第4页浏览型号ISL78234AARZ的Datasheet PDF文件第5页浏览型号ISL78234AARZ的Datasheet PDF文件第6页浏览型号ISL78234AARZ的Datasheet PDF文件第7页 
DATASHEET  
ISL78233, ISL78234  
3A and 4A Compact Synchronous Buck Regulators  
FN8359  
Rev.9.00  
Feb 21, 2019  
The ISL78233 and ISL78234 are highly efficient, monolithic,  
synchronous step-down DC/DC converters that can deliver 3A  
(ISL78233), or 4A (ISL78234) of continuous output current from  
a 2.7V to 5.5V input supply. The devices use current mode control  
architecture to deliver a very low duty cycle operation at high  
frequency with fast transient response and excellent loop stability.  
Features  
• 2.7V to 5.5V input voltage range  
• Very low ON-resistance FETs - P-channel 35mΩ and  
N-channel 11mΩ typical values  
• High efficiency synchronous buck regulator with up to 95%  
efficiency  
The ISL78233 and ISL78234 integrate a very low  
ON-resistance P-channel (35mΩ) high-side FET and N-channel  
(11mΩ) low-side FET to maximize efficiency and minimize  
external component count. The 100% duty-cycle operation  
allows less than 200mV dropout voltage at 4A output current.  
The operation frequency of the Pulse-Width Modulator (PWM)  
is adjustable from 500kHz to 4MHz. The default switching  
frequency of 2MHz is set by connecting the FS pin high.  
• -1.2%/1% reference accuracy over temperature/load/line  
• Complete BOM with as few as 3 external parts  
• Internal soft-start - 1ms or adjustable  
• Soft-stop output discharge during disable  
• Adjustable frequency from 500kHz to 4MHz - default at  
2MHz  
The ISL78233 and ISL78234 can be configured for  
discontinuous or forced continuous operation at light load.  
Forced continuous operation reduces noise and RF  
interference, while discontinuous mode provides higher  
efficiency by reducing switching losses at light loads.  
• External synchronization up to 4MHz  
• Over-temperature, overcurrent, overvoltage, and negative  
overcurrent protection  
• Shared common device pinout allows simplified output  
power upgrades over time  
Fault protection is provided by internal Hiccup mode current  
limiting during short-circuit and overcurrent conditions. Other  
protection, such as overvoltage and over-temperature are also  
integrated into the device. A power-good output voltage  
monitor indicates when the output is in regulation.  
• Tiny 3mmx3mm TQFN package  
• AEC-Q100 qualified  
Applications  
• DC/DC POL modules  
The ISL78233 and ISL78234 offer a 1ms Power-Good (PG)  
timer at power-up. When in shutdown, the ISL78233 and  
ISL78234 discharge the output capacitor through an internal  
soft-stop switch. Other features include internal fixed or  
adjustable soft-start and internal/external compensation.  
• μC/µP, FPGA, and DSP power  
• Video processor/SOC power  
• Li-ion battery powered devices  
• Automotive infotainment power  
The ISL78233 and ISL78234 are available in a 3mmx3mm 16  
Ld Thin Quad Flat (TQFN) Pb-free package and in a 5mmx5mm  
16 Ld Wettable Flank Quad Flat No-Lead (WFQFN) package  
with an exposed pad for improved thermal performance. The  
ISL78233 and ISL78234 are rated to operate across the  
temperature range of -40°C to +125°C.  
Related Literature  
For a full list of related documents, visit our website:  
• ISL78233, ISL78234 device pages  
100  
90  
3.3V  
OUT  
1.5V  
80  
OUT  
1.2V  
OUT  
1.8V  
OUT  
70  
60  
50  
40  
2.5V  
OUT  
0.0  
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
3.5  
4.0  
OUTPUT LOAD (A)  
FIGURE 1. EFFICIENCY vs LOAD (2MHz 5V PFM, T = +25°C)  
IN  
A
FN8359 Rev.9.00  
Feb 21, 2019  
Page 1 of 21  
1234567...21

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