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ISL8002BFRZ-T7A

更新时间： 2024-09-30 01:02:43
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瑞萨 - RENESAS /
页数 文件大小 规格书
22页 1836K
描述
Compact Synchronous Buck Regulator

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ISL8002BFRZ-T7A 数据手册

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DATASHEET  
ISL8002B  
Compact Synchronous Buck Regulator  
FN8690  
Rev 3.00  
October 28, 2016  
The ISL8002B is a highly efficient, monolithic, synchronous  
step-down DC/DC converter that can deliver up to 2A of  
continuous output current from a 2.7V to 5.5V input supply. It  
uses peak current mode control architecture to allow very low  
duty cycle operation. ISL8002B operates at a 2MHz switching  
frequency, thereby providing superior transient response and  
allowing for the use of a small inductor. ISL8002B also has  
excellent stability.  
Features  
• V range 2.7V to 5.5V  
IN  
• I  
OUT  
maximum is 2A  
• External soft-start programmable  
• Output tracking and sequencing  
• Switching frequency is 2MHz  
The ISL8002B integrates very low r  
DS(ON)  
MOSFETs in order to  
• Selectable PFM or PWM operation option  
• Overcurrent and short-circuit protection  
• Over-temperature/thermal protection  
maximize efficiency. In addition, since the high-side MOSFET is a  
PMOS, the need for a boot capacitor is eliminated, thereby  
reducing external component count.  
• V undervoltage lockout and V  
IN  
overvoltage protection  
OUT  
The device can be configured for either PFM (discontinuous  
conduction) or PWM (continuous conduction) operation at light  
load. PFM provides high efficiency by reducing switching  
losses at light loads and PWM for fast transient response,  
which helps reduce the output noise and RF interference.  
• Up to 95% peak efficiency  
Applications  
• General purpose POL  
The device is offered in a space saving 8 Ld 2mmx2mm TDFN  
Pb-free package with exposed pad for improved thermal  
performance. The complete converter occupies less than  
• Industrial, instrumentation and medical equipment  
• FPGAs  
2
• Telecom and networking equipment  
• Game console  
64mm area.  
Related Literature  
• For a full list of related documents, visit our website  
- ISL8002B product page  
ISL8002B  
L1  
+1.8V/2A  
+2.7V … +5.5V  
1
2
3
4
8
7
6
100  
VIN  
PHASE  
PGND  
FB  
VOUT  
GND  
VIN  
C1  
22µF  
C2  
2.5V  
OUT  
3x10µF  
GND  
C3  
90  
80  
70  
60  
50  
40  
EN  
4.7pF  
R1  
200k1%  
EN  
PG  
MODE  
PG  
0.6V  
R2  
100k1%  
1.8V  
OUT  
1.5V  
OUT  
5
1.2V  
SS/TR  
PAD  
OUT  
R3  
200k1%  
TRACK  
9
0.9V  
OUT  
R4  
100k1%  
0.8V  
OUT  
V
O
(EQ. 1)  
-----------  
R
= R  
– 1  
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)  
1
2
VFB  
FIGURE 1. TYPICAL APPLICATION CIRCUIT CONFIGURATION (INTERNAL  
COMPENSATION OPTION)  
FIGURE 2. EFFICIENCY vs LOAD (f  
= 2MHz, V = 3.3V),  
IN  
SW  
MODE = PFM, T = +25°C  
A
FN8690 Rev 3.00  
October 28, 2016  
Page 1 of 22  
1234567...22

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