ILC6375 데이터 시트보기 (PDF) - Fairchild Semiconductor
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ILC6375 Datasheet PDF : 5 Pages
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www.fairchildsemi.com
ILC6375
1 Amp SOT-89 Step Down PWM Switcher Controller
Features
• Up to 1 Amp output current
• 85% to 90% efficiency at 0.5A to1A (VIN = 7V, VOUT =
5V)
• 85% efficiency at 10mA (VIN = 7V, VOUT = 5V)
• 100% Duty Cycle for ultra low drop-out
• 100kHz ±15% internal oscillator
• 10V(max) input voltage
• ±2.5% precision output
• Tiny SOT-89 package
Applications
• Cellular Phones
• Palmtop PCs and PDAs
• Portable instrumentation
• Digital cameras
• High efficiency 5V to 3.3V converter
Description
The ILC6375 is a high efficiency step-down DC-DC controller
using a PWM control scheme. The typical efficiency can be as high
as 85% to 90% at 10mA to 1 Amp load.
The ILC6375 drives an external switching transistor to deliver up to
1 Amp of output current. The internal oscillator operates at a fixed
100kHz frequency. Meanwhile, the device is capable of 100% duty
cycle thus allowing true low drop-out operation to maximize battery
life in portable applications. Output voltage is trimmed to ±2.5%
accuracy.
The device includes internal phase compensation and soft-start
circuitry. Available in a tiny SOT-89 package, the ILC6375 requires
an external PNP switching transistor, an inductor, a shottky diode
and capacitors.
Typical Applications
Tr
CIN +
VIN
RB
( 10V )
L
3
2
1
ILC6375
SD
4
5
GND
VOUT
5V/1A
+
CL
Tr
3
2
1
CIN +
VIN
ILC6375
RB
SD
( 5V to 10V )
4
5
VOUT
( 5V )
+
CL
GND
L: 100mH (SUMIDA CD-54)
SD: Shottky Diode (MATSUSHITA MA735)
CIN: 10mF/16VTantalum Capacitor (NICHICON F93)
CL: 47mF/10VTantalum Capacitor (NICHICON F93)
Tr: PNP Transistor (TOSHIBA 2SA1213)
RB: 1k
Rev.1.2
©2001 Fairchild Semiconductor Corporation
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