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ISL8002AFRZ-T7A

更新时间： 2024-12-01 12:08:39
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英特矽尔 - INTERSIL 稳压器
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24页 1324K
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Compact Synchronous Buck Regulators

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Compact Synchronous Buck Regulators  
ISL8002, ISL8002A, ISL80019, ISL80019A  
ISL8002, ISL8002A, ISL80019 and ISL80019A are highly  
efficient, monolithic, synchronous step-down DC/DC converters  
Features  
• V range 2.7V to 5.5V  
IN  
that can deliver up to 2A of continuous output current from a 2.7V  
to 5.5V input supply. They use peak current mode control  
architecture to allow very low duty cycle operation. They operate  
at either 1MHz or 2MHz switching frequency, thereby providing  
superior transient response and allowing for the use of small  
inductors. They also have excellent stability and provide both  
internal and external compensation options.  
• V  
range is 0.6V to V  
OUT  
IN  
maximum is 1.5A or 2A (see Table 1 on page 3)  
• I  
OUT  
• Switching frequency is 1MHz or 2MHz (see Table 1 on  
page 3)  
• Internal or external compensation option  
• Selectable PFM or PWM operation option  
• Overcurrent and short circuit protection  
• Over-temperature/thermal protection  
ISL8002, ISL8002A, ISL80019 and ISL80019A integrate very low  
r
MOSFETs in order to maximize efficiency. In addition,  
DS(ON)  
since the high side MOSFET is a PMOS, the need for a Boot  
capacitor is eliminated, thereby reducing external component  
count. They can operate at 100% duty cycle (at 1MHz) with a  
dropout of 200mV at 2A output current.  
• V Undervoltage Lockout and V  
IN  
Overvoltage Protection  
OUT  
• Up to 95% peak efficiency  
These devices 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 reduces noise susceptibility and RF  
interference.  
Applications  
• General purpose point of load DC/DC  
• Set-top boxes and cable modems  
• FPGA power  
These devices are offered in a space saving 8 pin 2mmx2mm  
TDFN lead free package with exposed pad for improved thermal  
performance. The complete converter occupies less than  
• DVD, HDD drives, LCD panels, TV  
2
0.10in area.  
Related Literature  
• See AN1803, “1.5A/2A Low Quiescent Current High  
Efficiency Synchronous Buck Regulator”  
ISL8002  
L1  
100  
90  
1.2μH  
+1.8V/2A  
+2.7V …+5.5V  
1
2
3
4
8
7
6
5
VIN  
PHASE  
PGND  
FB  
VOUT  
GND  
VIN  
C1  
C5  
C6  
22μF  
22μF  
22μF  
GND  
EN  
80  
R1  
200kΩ 1%  
+0.6V  
EN  
PG  
MODE  
PG  
70  
R2  
100kΩ 1%  
2.5V  
1.8V  
1.5V  
1.2V  
0.9V  
0.8V  
OUT  
OUT  
OUT  
OUT  
OUT  
OUT  
COMP  
PAD  
60  
50  
40  
9
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  
= 1MHz, V = 3.3V, MODE = PFM, T = +25°C  
F
SW  
IN  
A
July 30, 2013  
FN7888.2  
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 2013. 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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