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ISL95901EVAL1Z

更新时间： 2024-02-04 21:57:30
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瑞萨 - RENESAS /
页数 文件大小 规格书
24页 1590K
描述
Wide VIN Dual Integrated Buck Regulator With 4A/4A Continuous Output Current and LDOs

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中文翻译

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ISL95901EVAL1Z 数据手册

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DATASHEET  
GNS  
NT  
r at  
ESI  
EME  
ente  
NE  
REP  
upp  
w.in  
W D  
LAC  
ort C  
ters  
FOR  
ED  
al S  
ww  
ED  
END  
hnic  
or  
END  
MM  
Tec  
RSIL  
MM  
ECO  
our  
NTE  
CO  
T RE  
NO R  
NO  
tact  
con  
c
m/ts  
il.co  
88-I  
1-8  
ISL95901  
FN7893  
Rev 1.00  
January 22, 2015  
Wide V Dual Integrated Buck Regulator With 4A/4A Continuous Output Current  
IN  
and LDOs  
The ISL95901 is a dual, high-efficient buck regulator capable  
Features  
of 4A per channel continuous output current. It integrates two  
• Wide input voltage range from 4.5V to 16V  
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.  
• 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  
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.  
• Innovative R4™ Modulator  
• Boot undervoltage detection  
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
FN7893 Rev 1.00  
January 22, 2015  
Page 1 of 24  
1234567...24

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