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ISL80019AEVAL1Z

更新时间： 2024-12-01 01:10:31
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Compact Synchronous Buck Regulators

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DATASHEET  
ISL8002, ISL8002A, ISL80019, ISL80019A  
Compact Synchronous Buck Regulators  
FN7888  
Rev 4.00  
July 31, 2014  
The ISL8002, ISL8002A, ISL80019 and ISL80019A are highly  
efficient, monolithic, synchronous step-down DC/DC converters  
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.  
Features  
• V range 2.7V to 5.5V  
IN  
• 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  
The ISL8002, ISL8002A, ISL80019 and ISL80019A 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 (at 1MHz)  
with a dropout of 200mV at 2A output current.  
• Over-temperature/thermal protection  
• 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  
Related Literature  
• See AN1803, “1.5A/2A Low Quiescent Current High  
Efficiency Synchronous Buck Regulator”  
2
0.10in area.  
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  
200k1%  
+0.6V  
EN  
PG  
MODE  
PG  
70  
R2  
100k1%  
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  
F
= 1MHz, V = 3.3V, MODE = PFM, T = +25°C  
SW  
IN  
A
FN7888 Rev 4.00  
July 31, 2014  
Page 1 of 23  
1234567...23

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