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RC5036M Datasheet

  • RC5036M

  • Current-Mode SMPS Controller

  • 110.65KB

  • 17頁

  • ETC

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上傳產(chǎn)品規(guī)格書

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www.fairchildsemi.com
RC5036
Dual Adjustable Voltage Regulator Controller
Features
鈥?Combines switching regulator and low dropout linear
regulator in single chip
鈥?Linear regulator on/off control
鈥?Each output voltage adjustable from 1.5V to 3.6V
鈥?Built-in soft start
鈥?Switcher can be con鏗乬ured for 13A loads, linear for 5A
鈥?Precision trimmed low TC voltage reference
鈥?Constant On-Time oscillator
鈥?Small footprint 16 lead SOIC package
Description
The RC5036 combines a switch-mode DC-DC converter
with a low-dropout linear regulator. In addition, it integrates
the circuitry required to switch the DC-DC converter output
between 3.5V and a user-selectable voltage from 1.5V to 3.6V
as well as an enable function to allow the linear regulator to
be turned off when not required. RC5036 has built-in soft
start feature which offers system protection during power-up
by reducing both inrush current and output overshoot.
With the appropriate external components, the DC-DC
converter can deliver load current as high as 13A and the
linear regulator can provide 5A. The DC-DC converter and
the linear regulator can be set independently using two
external resistors each to any value between 1.5V and 3.6V.
The factory trimmed internal reference achieves tight toler-
ance voltage regulation on both outputs. Independent short
circuit protection is also provided.
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
RAMBUS or SDRAM power with ACPI support
I/O and AGP power
High ef鏗乧iency power for DSPs
Programmable dual power supply for high current loads
Block Diagram
+12V
+5V
SWITCHING
REGULATOR
SWITCHER
SELECT
OSCILLATOR
FEEDBACK
CONTROL
DIGITAL
LOGIC
LINEAR
ENABLE
LINEAR REGULATOR
1.5V
REFERENCE
+
鈥?/div>
RC5036
REV. 2.0.0

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