参数资料
| 型号： | SC2440TETRT |
| 厂商： | Semtech |
| 文件页数： | 4/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 2A DL 16TSSOP |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出数： | 2 |
| 输入电压： | 2.8 V ~ 20 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-TSSOP |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC2440TEDKR |
SC2440
POWER MANAGEMENT
Pin Configuration
Ordering Information
TOP VIEW
Part Number
SC2440TETRT
Package (1)(2)
TSSOP-16 EDP
BOOST1
SW1
1
2
16
15
FB1
COMP1
SC2440EVB
Evaluation Board
IN
SYNC
ROSC
IN
SW2
BOOST2
3
4
5
6
7
8
14
13
12
11
10
9
PGOOD1
SS1
SS2
PGOOD2
COMP2
FB2
Notes:
(1) Only available in tape and reel packaging. A reel contains
2500 devices.
(2) Lead free product. This product is fully WEEE and RoHS
compliant.
(16 Pin TSSOP-EDP)
Underside metal must be soldered to ground.
Pin Descriptions
Pin #
1, 8
2, 7
3, 6
4
5
9, 16
10, 15
11, 14
12, 13
Underside
Metal
Pin Name
BOOST1,
BOOST2
SW1, SW2
IN
SYNC
ROSC
FB1, FB2
COMP1,
COMP2
PGOOD1,
PGOOD2
SS1, SS2
GND
Pin Function
Supply pins to the power transistor drivers.Tie to external diode-capacitor charge pumps to
generate drive voltages higher than V IN in order to fully saturate the internal NPN power switches.
Emitters of the internal power NPN transistors. Connect to the inductors, the freewheeling diodes
and the boost capacitors.
Input power supply pins of the SC2440 and also the common collector of the internal power
NPNs. Pins 3 and 6 are internally tied together and must be locally bypassed.
Driving the SYNC pin with an external clock synchronizes both step-down converters. The
external clock frequency must be at least twice the individual regulator set (or free-running)
frequency. Tie this pin to ground if not used.
An external resistor between this pin and the ground sets the master oscillator free-running
frequency. The set frequency is twice that of the individual switching regulator.
The inverting inputs of the error amplifiers. Each FB pin is tied to a resistive divider between its
output and the ground for setting the channel output voltage.
These are the outputs of the internal error amplifiers. The voltages on these pins control the peak
switch currents. RC networks at these pins compensate the control loops. Pulling either pin below
0.7V stops the corresponding switching regulator.
Open collector outputs of the Power Good comparators. Tie to external pull-up resistors from the
input or the output of the converter. The PGOOD outputs become valid as soon as V IN rises
above 1 V BE during power-up. PGOOD is actively pulled low until the corresponding FB pin rises
to within 10% of the final regulation voltage.
A capacitor from either SS pin to the ground provides soft-start and overload hiccup functions
for that channel. Pulling either SS pin below 0.8V with an open drain or collector transistor shuts
off the corresponding regulator. To completely shut off the SC2440 to low-current state, pull both
SS pins to the ground. Soft-start is recommended for all applications.
The exposed pad at the bottom of the package is the electrical ground connection of the
SC2440. It also provides a thermal contact to the circuit board. It is to be soldered to the ground
plane of the board.
? 2005 Semtech Corp.
4
www.semtech.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC2441 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441A | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441A_09 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441AEVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter |
| SC2441ATETRT | 制造商:Semtech Corporation 功能描述: |
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