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參數(shù)資料
| 型號： | SC424MLTRT |
| 廠商： | Semtech |
| 文件頁數(shù)： | 12/29頁 |
| 文件大?。?/td> | 496K |
| 描述： | IC REG DL BUCK/LINEAR 28MLPQ |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | SmartDrive™ |
| 拓?fù)洌?/td> | 降壓（降壓）（1），線性（LDO）（1） |
| 功能： | 任何功能 |
| 輸出數(shù)： | 2 |
| 頻率 - 開關(guān)： | 200kHz ~ 1MHz |
| 電壓/電流 - 輸出 1： | 可調(diào)至 0.75V，6A |
| 電壓/電流 - 輸出 2： | 5V，150mA |
| 帶 LED 驅(qū)動器： | 無 |
| 帶監(jiān)控器： | 無 |
| 帶序列發(fā)生器： | 無 |
| 電源電壓： | 3 V ~ 28 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 28-MLPQ（4x4） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | SC424MLDKR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁當(dāng)前第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
SC414/SC424
12
Pin Descriptions
Pin # Pin Name Pin Function
1
FB
Feedback input for switching regulator used to program the output voltage connect to an external resis-
tor divider from VOUT to AGND.
2
V5V
Bias input for internal analog circuits and gate drives connect to external 3V or 5V supply or bias connec-
tion to VLDO.
3, 26, PAD 1 AGND Analog ground
4
VOUT Switcher output voltage sense pin, and also the input to the internal switch-over between VOUT and VLDO.
5, 8-11
PAD 2
VIN Input supply voltage
6
VLDO 5V LDO output
7
BST
Bootstrap pin connect a capacitor from BST to LXBST to develop the fl oating supply for the high-side gate
drive.
12
LXBST LX Boost connect to the BST capacitor.
15,20, 21,
PAD 3
LX Switching (phase) node
13, 14, 16-19 PGND Power ground
22
PGOOD
Open-drain power good indicator high impedance indicates power is good. An external pull-up
resistor is required.
23
ILIM Current limit sense pin used to program the current limit by connecting a resistor from ILIM to LXS.
24
LXS LX sense connects to RILIM resistor
25
EN/PSV
Enable/power save input for the switching regulator connect to AGND to disable the switching regula-
tor. Float to operate in forced continuous mode (power save disabled). For SC414, connect to V5V to operate
with ultrasonic power save mode enabled. For SC424, connect to V5V to operate with power save mode
enabled with no minimum frequency.
27
TON On-time programming input set the on-time by connecting through a resistor to AGND
28
ENL
Enable input for the LDO connect ENL to AGND to disable the LDO. Drive with logic to +3V for logic con-
trol, or program the VIN UVLO with a resistor divider between VIN, ENL, and AGND.
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