参数资料
| 型号： | SC412AMLTRT |
| 厂商： | Semtech |
| 文件页数： | 6/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 16-MLP |
| 标准包装： | 1 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 325kHz |
| 占空比： | 90% |
| 电源电压： | 3 V ~ 25 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-MLP |
| 包装： | 标准包装 |
| 其它名称： | SC412AMLDKR |
POWER MANAGEMENT
Pin Descriptions
NOT RECOMMENDED FOR NEW DESIGN
SC412A
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
T
Pin Name
LX
BST
VCC
DL
GND
RTN
NC
NC
FB
VOUT
PGOOD
EN
ILIM
NC
NC
DH
PAD
Pin Function
Switching (phase) node
Boost capacitor connection for high-side gate drive
5V power input for internal analog circuits and gate drive outputs
Gate drive output for the low-side external MOSFET
Power ground — the return point for the DL driver output and the reference point
for the ILIM and Zero Cross circuits
Return or analog ground for VOUT sense — connect to GND at the chip
Not connected internally — leave unconnected or connect to GND
Not connected internally — leave unconnected or connect to GND
Feedback input — connect to an external resistor divider from
VOUT to program the output voltage
Output voltage sense point for determining the on-time
Open-drain Power Good indicator — high impedance indicates power is good —
an external pull-up resistor is required.
Enable input — connect EN to RTN to disable the SC412A
Current limit sense point — to program the current limit connect a resistor from ILIM to
LX or to a current sense resistor
Not connected internally — leave unconnected or connect to GND
Not connected internally — leave unconnected or connect to GND
Gate drive output for the high-side external FET
Thermal pad for heatsinking purposes — not connected internally — connect to system
ground through preferably one large via or multiple smaller vias
? 2006 Semtech Corp.
6
www.semtech.com
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