參數(shù)資料
型號(hào)： SC471
廠商： Semtech Corporation
英文描述： Synchronous Buck Controller with Multi-Level VOUT Transition Support
中文描述： 同步降壓控制器具有多層次VOUT電源支持過(guò)渡
文件頁(yè)數(shù)： 7/27頁(yè)
文件大?。?/td> 634K
代理商： SC471
7
2006 Semtech Corp.
SC471/SC471A
www.semtech.com
POWER MANAGEMENT
Pin Descriptions
Pin
Pin Name
Pin Function
1
LX
Switching (phase) node
2
BST
Boost capacitor connection for high-side gate drive
3
VCC
5V power input for the internal circuits and gate drive outputs
4
DL
Gate drive output for the low-side external MOSFET
5
GND
Power ground. This is the return point for the DL driver output, and the reference point for the
ILIM and zero cross circuits
6
RTN
Return or analog ground for the FB input and FB resistor divider . Connect to GND directly at the
IC. All feedback components should connect to this ground.
7
D1
Drain of second internal MOSFET which is controlled by G1
8
D0
Drain of
fi
rst internal MOSFET which is controlled by G0
9
FB
Feedback sense point. The FB threshold is 0.75V; the resistor divider ratio between VOUT and
FB sets the output voltage. This ratio can be modi
fi
ed using the G0/G1 inputs to switch resistors
in/out at D0/D1.
10
VOUT
Output voltage sense point for determining On-Time
11
PGOOD
Open-drain power good indicator - a high impedance indicates power is good - an external pull-up
resistor is required
12
EN
Enable input - connect EN to RTN to disable the SC471/A
13
ILIM
Current limit sense point — to program the current limit connect a resistor from ILIM to
LX or to a current sense resistor
14
G0
Control input for the D0 MOSFET. A logic high (low) energizes the D0 MOSFET on the SC471
(SC471A), pulling D0 to ground.
15
G1
Control input for the D1 MOSFET. A logic high (low) energizes the D1 MOSFET on the SC471
(SC471A), pulling D1 to ground.
16
DH
Gate drive output for the high-side external MOSFET
T
PAD
Mounting pad. Not connected internally - connect to system ground plane through preferably one
large vias or multiple smaller vias
相關(guān)PDF資料
PDF描述
SC471A Synchronous Buck Controller with Multi-Level VOUT Transition Support
SC471AMLTRT Synchronous Buck Controller with Multi-Level VOUT Transition Support
SC472B Single-Phase Single Chip Graphics Core Power Supply
SC473 Single-Phase Single Chip Graphics Core Power Supply
SC473EVB Single-Phase Single Chip Graphics Core Power Supply
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC471_08 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Multi-Level VOUT Transition Support
SC471A 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Multi-Level VOUT Transition Support
SC471AEVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Multi-Level VOUT Transition Support
SC471AMLTRT 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Multi-Level VOUT Transition Support
SC471EVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Multi-Level VOUT Transition Support
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