參數(shù)資料
型號： RC5054
廠商： Fairchild Semiconductor Corporation
元件分類： DC/DC變換器
英文描述： Programmable Synchronous DC-DC Converter Controller for Low Voltage Microprocessors
中文描述： 可編程同步DC - DC轉(zhuǎn)換控制器，用于低電壓微處理器
文件頁數(shù)： 7/13頁
文件大?。?/td> 122K
代理商： RC5054
PRODUCT SPECIFICATION
RC5054A
7
Typical Application
+12V
+V
OUT
PGND
RC5054
VSEN
RT
FB
COMP
VID0
VID1
VID2
VID3
VID4
SS
PGOOD
D/A
GND
OSC
LGATE
UGATE
OCSET
PHASE
BOOT
EN
VCC
V
IN
= +5V
OVP
MONITOR AND
PROTECTION
+
-
+
-
Applications Discussion
Layout Considerations
As in any high frequency switching converter, layout is very
important. Switching current from one power device to another
can generate voltage transients across the impedances of the
interconnecting bond wires and circuit traces. These intercon-
necting impedances should be minimized by using wide, short
printed circuit traces. The critical components should be
located as close together as possible, using ground plane
construction or single point grounding.
Figure 3 shows the critical power components of the converter.
To minimize the voltage overshoot the interconnecting wires
indicated by heavy lines should be part of ground or power
plane in a printed circuit board The components shown in
Figure 3 should be located as close together as possible. Please
note that the capacitors C
IN
and C
O
each represent numerous
physical capacitors. Locate the RC5054A within 3 inches of
the MOSFETs, Q1 and Q2. The circuit traces for the MOSFETs’
gate and source connections from the RC5054A must be
sized to handle up to 1A peak current.
Figure 3. Printed Circuit Board
Power and Ground Planes or Islands
Figure 4 shows the circuit traces that require additional
layout consideration. Use single point and ground plane
construction for the circuits shown. Minimize any leakage
current paths on the SS PIN and locate the capacitor, C
SS
close to the SS pin because the internal current source is only
10
μ
A. Provide local V
CC
decoupling between V
CC
and
GND pins. Locate the capacitor, C
BOOT
as close as practical
to the BOOT and PHASE pins.
Figure 4. Printed Circuit Board
Small Signal Layout Guidelines
Feedback Compensation
Figure 5 highlights the voltage-mode control loop for a
synchronous-rectified buck converter. The output voltage
(V
OUT
) is regulated to the Reference voltage level. The error
amplifier (Error Amp) output (V
E/A
) is compared with the
oscillator (OSC) triangular wave to provide a pulse-width
modulated (PWM) wave with an amplitude of V
IN
at the
PHASE node. The PWM wave is smoothed by the output
filter (L
O
and C
O
).
PGND
L
O
C
O
LGATE
UGATE
PHASE
Q1
Q2
D2
V
IN
V
OUT
RETURN
RC5054A
C
IN
L
+12V
RC5054A
SS
GND
VCC
BOOT
D1
L
O
C
O
V
OUT
Q1
Q2
PHASE
+V
IN
C
BOOT
C
VCC
C
SS
L
相關(guān)PDF資料
PDF描述
RC5054A Programmable Synchronous DC-DC Converter Controller for Low Voltage Microprocessors
RC5054AM
RC5057 High Performance Programmable Synchronous DC-DC Controller for Low Voltage Microprocessors
RC5057M High Performance Programmable Synchronous DC-DC Controller for Low Voltage Microprocessors
RC5058 High Performance Programmable Synchronous DC-DC Controller for Multi-Voltage Platforms
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RC5054A 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Programmable Synchronous DC-DC Converter Controller for Low Voltage Microprocessors
RC5054ACB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Mode SMPS Controller
RC5054AM 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 DISC BY MFG 2/02 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
RC5054AMT 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 DISC BY MFG 2/02 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
RC5055 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
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