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ISL80030A

更新时间： 2024-01-28 13:48:50
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英特矽尔 - INTERSIL /
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20页 925K
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3A Synchronous Buck Converter In 2x2 DFN Package

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DATASHEET  
3A Synchronous Buck Converter In 2x2 DFN Package  
ISL80030, ISL80030A, ISL80031, ISL80031A  
The ISL80030, ISL80030A, ISL80031 and ISL80031A are highly  
efficient, monolithic, synchronous step-down DC/DC converters  
Features  
• V range 2.7V to 5.5V  
that can deliver up to 3A 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 a 1MHz or 2MHz switching frequency, thereby providing  
superior transient response and allowing for the use of small  
inductors. They have excellent stability.  
IN  
• Up to 3A of output current  
• Switching frequency is 1MHz or 2MHz (see Table 1 on page 3)  
• 35µA quiescent current (ISL80031/A)  
• Overcurrent and short-circuit protection  
• Over-temperature/thermal protection  
• Negative current protection  
The ISL80030, ISL80030A, ISL80031 and ISL80031A integrate  
very low r  
MOSFETs in order to maximize efficiency. In  
DS(ON)  
addition, 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.  
• Power-good and enable  
• 100% duty cycle  
The ISL80031, ISL80031A configured for PFM discontinuous  
conduction operation, provides high efficiency by reducing  
switching losses at light loads.  
• Internal soft-start and soft-stop  
• V undervoltage lockout and V  
IN  
overvoltage protection  
OUT  
• Up to 95% peak efficiency  
ISL80030, ISL80030A configured for PWM pulse width  
modulation operation, provides a fast transient response,  
which helps reduce the output noise and RF interference.  
Applications  
• General purpose POL  
These devices are offered in a space saving 8 pin 2mmx2mm  
DFN lead-free package with exposed pad for improved thermal  
performance. The complete converter occupies less than  
• Industrial, instrumentation and medical equipment  
• Telecom and networking equipment  
• Game console  
2
64mm area.  
100  
ISL80030/ISL80031  
L1  
V
= 3.3V  
OUT  
+1.8V/3A  
+2.7V …+5.5V  
1
2
3
4
8
7
6
VIN  
PHASE  
PGND  
PGND  
FB  
VOUT  
GND  
VIN  
VIN  
EN  
93  
87  
80  
73  
67  
60  
C1  
22µF  
C2  
22µF  
GND  
C3  
EN  
PG  
22pF  
R1  
V
= 1.8V  
OUT  
200k1%  
5
0.6V  
PG  
EPAD  
R
2
100k1%  
V
= 2.5V  
OUT  
9
V
O
(EQ. 1)  
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0  
LOAD (A)  
-----------  
R
= R  
– 1  
1
2
VFB  
FIGURE 1. TYPICAL APPLICATION CIRCUIT CONFIGURATION  
FIGURE 2. EFFICIENCY vs LOAD, ISL80031, V = 5V, T = +25°C  
IN  
A
July 20, 2015  
FN8766.0  
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 2015. 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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