参数资料
| 型号： | SC286ULTRT |
| 厂商： | Semtech |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 28MLPQ |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 3.3 V |
| 输入电压： | 2.9 V ~ 5.5 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 1.6MHz |
| 电流 - 输出： | 4A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-UFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 28-MLPQ（4x4） |
| 其它名称： | SC286ULDKR |
SC286
Pin Descriptions
Pin #
1, 2
3
4
5, 6, 7, 8
9
10
11
12
13, 14
15, 16
17
18
19, 20, 21, 22
23
24
25
26
27, 28
T
Pin Name
PVINA
AGNDA
AVINA
CTL XA
PGOODA
SSA
VOUTA
PGNDB
LXB
PVINB
AGNDB
AVINB
CTL XB
PGOODB
SSB
VOUTB
PGNDA
LXA
Thermal Pad
Pin Function
Input supply voltage for the converter power stage
Ground connection for the internal circuitry — AGNDA needs to be connected to PGNDA directly.
Power supply for the internal circuitry — AVINA is required to be connected to PVINA through an R-C filter of
1Ω and 100nF.
Control bit — see Table 1 for decoding. These pins have 500kΩ internal pull-down resistors which are switched
into the circuit whenever CTL XA is low or when the part is in under-voltage lockout.
Power good indicator — when the output voltage reaches the PGOODA threshold, this pin will be open-drain
(after the PGOODA delay), otherwise, it is pulled low internally.
Soft Start — connect a soft-start capacitor to program the soft start time. There is a 5μA charging current
flowing out of the pin.
Output voltage sense pin
Ground connection for converter power stage
Switching node — connect an inductor between this pin and the output capacitor.
Input supply voltage for the converter power stage
Ground connection for the internal circuitry — AGNDB needs to be connected to PGNDB directly.
Power supply for the internal circuitry — AVINB is required to be connected to PVINB through an R-C filter of
1Ω and 100nF.
Control bit — see Table 1 for decoding. These pins have 500kΩ internal pull-down resistors which are switched
into the circuit whenever CTL XB is low or when the part is in under-voltage lockout.
Power good indicator — when the output voltage reaches the PGOODB threshold, this pin will be open-drain
(after the PGOODB delay), otherwise, it is pulled low internally.
Soft Start — connect a soft-start capacitor to program the soft start time. There is a 5μA charging current
flowing out of the pin.
Output voltage sense pin
Ground connection for converter power stage
Switching node — connect an inductor between this pin and the output capacitor.
Thermal pad for heat sinking purposes — recommend to connect to PGND. It is not connected internally.
5
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