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ISL95901EVAL1Z

更新时间： 2024-09-25 01:11:07
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英特矽尔 - INTERSIL /
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24页 1136K
描述
Wide VIN Dual Integrated Buck Regulator With 4A/4A Continuous Output Current and LDOs

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DATASHEET  
Wide V Dual Integrated Buck Regulator With 4A/4A  
IN  
Continuous Output Current and LDOs  
ISL95901  
Features  
The ISL95901 is a dual, high-efficient buck regulator capable  
of 4A per channel continuous output current. It integrates two  
LDOs and one low-impedance switch. This power management  
IC delivers power in portable and embedded systems. With an  
input range of 4.5V to 16V, it provides a high frequency power  
solution for a variety of point-of-load applications. Outputs are  
adjustable to meet system needs.  
• Wide input voltage range from 4.5V to 16V  
• Adjustable output voltages with continuous output current  
up to 4A  
• 1% accuracy over temperature and V range  
CC  
• Built-in low-power LDO for external µC  
• Built-in compensation  
A PWM controller drives two pairs of internal switching  
N-channel power MOSFETs to generate output voltage. The  
integrated power switch is optimized for excellent thermal  
performance for up to 4A of output current per channel.  
• Internally set SS and OCP  
• Independent enable, power-good and standby control inputs  
for each output  
• Innovative R4™ Modulator  
• Boot undervoltage detection  
The ISL95901 modulator features Intersil R4™ Technology,  
which combines the best features of fixed-frequency and  
hysteretic PWMs while eliminating many of their drawbacks.  
Like R3™ Technology, the R4™ Technology allows variable  
frequency in response to load transients and maintains the  
benefits of current-mode hysteretic controllers. In addition, it  
reduces regulator output impedance and uses accurate  
referencing to eliminate the need for a high-gain voltage  
amplifier. The resulting topology can be tuned to voltage-mode  
hysteretic transient speed while maintaining a linear control  
model. This topology removes the need for compensation,  
which greatly simplifies regulator design for customers and  
reduces external component count and cost.  
Applications  
• General purpose, point-of-load DC/DC power conversion  
• Notebook, netbook and tablet  
• Embedded computing system  
Related Literature  
• See AN1743 “Wide V Dual Integrated Buck Regulator With  
IN  
4A/4A Continuous Output Current and LDOs”  
Protection features include overcorrect, negative overcorrect,  
UVLO and thermal overload. The ISL95901 is available in a  
46 Ld 5mmx6mm Quad Flat (QFN) Pb-free package.  
00  
90  
I
OUT  
12V PFM  
IN  
6V PFM  
IN  
80  
70  
60  
50  
40  
R4  
8.4V PFM  
IN  
R3  
6V PWM  
IN  
V
COMP  
8.4V PWM  
IN  
f
= 300kHz, V = 5V  
OUT  
SW  
12V PWM  
IN  
V
OUT  
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0  
OUTPUT LOAD (A)  
t
FIGURE 1. EFFICIENCY vs LOAD, V = 12V, T = +25°C  
IN  
FIGURE 2. R3™ vs R4™ IDEALIZED TRANSIENT RESPONSE  
A
January 22, 2015  
FN7893.1  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013, 2015. All Rights Reserved  
Intersil (and design) and R3 and R4 technologies are trademarks owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
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