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參數(shù)資料
| 型號(hào)： | SC198EVB |
| 廠(chǎng)商： | Semtech Corporation |
| 英文描述： | Dual DC-DC Buck Converter with High Current Capability |
| 中文描述： | 雙的DC - DC降壓轉(zhuǎn)換器高電流能力 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大小： | 399K |
| 代理商： | SC198EVB |
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Description
The SC198 is a high-ef
fi
ciency, dual synchronous buck
converter designed for use in low power applications. Each
converter is capable of supplying up to 600mA of average
current at one of eight programmable output voltages
commonly used as microprocessor supply voltages.
October 19, 2006
Typical Application Circuit
The SC198 uses a single control logic block for the two
converters, but their controls can be set independently.
The SC198 employs a
fl
exible clocking scheme that
allows the user to use the
fi
xed internal 1MHz oscillator or
synchronize the clock to an external source. The device
also has an optional power-save mode that optimizes
ef
fi
ciency for light loads.
The SC198 provides output voltage
fl
exibility while
conserving board space by using control pins to select
the output voltage instead of external resistor voltage
divider circuits. This eliminates at least four parts from
the traditional dual buck converter bill of materials.
Dual Buck Converters with Independent Control
High Ef
fi
ciency - Over 90% Peak
8 Programmable Output Voltages
Input Voltage Range Between 2.7V to 5.5V
Fixed-Frequency Operation - 1MHz
Optional SYNC Clock Input
Optional
Power-Save Under Light-Load
Conditions
Shutdown Current <1
μ
A
Soft-Start to Limit In-Rush Current
4mm x 4mm MLPQ Package
Features
Applications
Mobile Phones
Cordless Phones
MP3 Players
Digital Cameras
PDAs
Single Li-ion Cell or (3) NiMH/NiCd Cell Devices
Digital Multimedia Broadcast (DMB) Devices
Portable Gaming Systems
4.7
μ
H
4.7
μ
H
VINA
VINR
VINB
ENA
CTLA0
CTLA1
CTLA2
ENB
CTLB0
CTLB1
CTLB2
LXA
VOUTA
GNDA
LXB
VOUTB
GNDB
SYNC
GNDR
VOUTB
1
18
15
5
6
7
16
11
10
9
17
2
4
3
14
12
13
8
20
10
μ
F
10
μ
F
VOUTA
10
μ
F
SC198
www.semtech.com
1
SC198
Dual DC-DC Buck Converter
with High Current Capability
POWER MANAGEMENT
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