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RC5037 Datasheet

  • RC5037

  • Adjustable Switching Regulator Controller

  • 12頁

  • FAIRCHILD

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www.fairchildsemi.com
RC5037
Adjustable Switching Regulator Controller
Features
鈥?High power switch-mode DC-DC controller can provide
in excess of 13A
鈥?Output voltage adjustable from 1.5V to 3.6V
鈥?85% ef鏗乧iency
鈥?Cumulative accuracy < 3% over line, load, and
temperature variations
鈥?Overvoltage and short circuit protection
鈥?Built-in soft start
Description
The RC5037 is a high power, switch-mode DC-DC controller
that provides ef鏗乧ient power for all low-voltage applications.
This controller has a built-in Soft Start feature which offers
system protection during power-up by reducing both inrush
current and output overshoot. When combined with the
appropriate external circuitry, the RC5037 can deliver load
currents as high as 13A at ef鏗乧iencies as high as 88%. The
RC5037 can generate output voltages from 1.5V up to 3.6V
using external resistors.
The RC5037 is designed to operate in a constant on-time
control mode under all load conditions. Its accurate low TC
reference eliminates the need for precision external compo-
nents in order to achieve the tight tolerance voltage regula-
tion required by many applications. Short circuit current
protection is provided through the use of a current sense
resistor, while overvoltage protection is provided internally.
Applications
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鈥?/div>
鈥?/div>
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I/O and AGP power for desktop computers
High ef鏗乧iency power for ASICs
High ef鏗乧iency power for DSPs
Adjustable step-down power supplies
Block Diagram
5V
2
+12V
4
+5V
RC5037
Feedback Control
3
8
1
Oscillator
Digital Logic
7
Vout
1.5V
Reference
5
6
REV. 1.0.1

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