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SC338

更新时间: 2024-02-02 23:30:38
品牌 Logo 应用领域
商升特 - SEMTECH 控制器
页数 文件大小 规格书
14页 241K
描述
Ultra Low Output Voltage Dual Linear FET Controller

SC338 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Not Recommended零件包装代码:MSOP
包装说明:TSSOP, TSSOP10,.19,20针数:10
Reach Compliance Code:compliantHTS代码:8542.39.00.01
风险等级:5.28Samacsys Description:DC/DC Cntrlr Dual-OUT 10-Pin MSOP T/R
其他特性:IT CAN ALSO OPERATRE FROM A 12V NOMINAL SUPPLY模拟集成电路 - 其他类型:ANALOG CIRCUIT
JESD-30 代码:S-PDSO-G10JESD-609代码:e3
长度:3 mm功能数量:1
端子数量:10最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:TSSOP封装等效代码:TSSOP10,.19,20
封装形状:SQUARE封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度):NOT SPECIFIED电源:5 V
认证状态:Not Qualified座面最大高度:1.1 mm
子类别:Power Management Circuits最大供电电流 (Isup):0.9 mA
最大供电电压 (Vsup):13.2 V最小供电电压 (Vsup):4.5 V
标称供电电压 (Vsup):5 V表面贴装:YES
温度等级:INDUSTRIAL端子面层:Matte Tin (Sn)
端子形式:GULL WING端子节距:0.5 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:3 mm

SC338 数据手册

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SC338(A)  
Ultra Low Output Voltage  
Dual Linear FET Controller  
POWER MANAGEMENT  
Description  
Features  
The SC338(A) is an ultra low output voltage dual power  
supply controller designed to simplify power management  
for notebook PCs. It is part of Semtech’s Smart LDOTM  
family of products. The SC338(A) has two user  
adjustable outputs that can be set anywhere between  
0.5V and 3.3V (VIN = 12V, anywhere between 0.5V and  
1.8V for VIN = 5V) using two external resistors per  
output.  
‹ ±1.5% and ±2.5% reference voltage options  
available  
‹ Two independant and fully adjustable outputs  
‹ Wide supply voltage range permits operation from  
5V or 12V rails  
‹ Very low quiescent current (500µA typical with both  
outputs enabled and 5V input)  
‹ Indivdual Enable control for each output  
‹ Individual Power Good monitoring and signalling for  
each output  
‹ Gate drives from input supply enable use of  
N-channel MOSFETs  
‹ User selectable dropout voltage  
‹ Individual under-voltage protection for each output  
‹ MSOP-10 surface mount package  
SC338(A) features for each output include tight output  
voltage regulation (±2.5% over -40°C to +85°C for  
SC338, ±1.5% over 0°C to +85°C for SC338A), enable  
controls, open drain power good signals, under-voltage  
protection and soft start. The enable pins allow the part  
to enter a very low power standby mode. Pulling them  
high enables the outputs. The power good pins are open  
drain and assert low when the voltage at their  
respective adjust pins is below 88% (typ.) of nominal. If  
the voltage at the adjust pin is below 50% (typ.) of  
nominal, the under voltage protection circuitry will shut  
down that output. The SC338(A) is available in an  
MSOP-10 surface mount package.  
Applications  
‹ Notebook PCs  
‹ Simple dual power supplies  
Typical Application Circuit  
5V or 12V IN  
1.2V +/-5% IN  
1.8V +/-5% IN  
C2  
C1  
0.1uF (1)  
0.1uF (1)  
8
7
6
5
1
3
1.05V @ 3A  
1.5V @ 1.5A  
Q1  
IRF7311  
or similar  
C3  
C4  
2
1
4
100uF, 25mOhm POSCAP  
R1  
100uF, 25mOhm POSCAP  
U1  
DRV1  
SC338(A)  
IN  
R5 2k (2)  
R3  
10  
9
11.0k  
R6 2k (2)  
20.0k  
2
ADJ1 DRV2  
3
4
5
8
1.05V Enable  
EN1  
ADJ2  
EN2  
7
1.05V Power Good  
1.5V Enable  
PGD1  
GND  
6
1.5V Power Good  
PGD2  
R2  
C5  
10nF (2)  
C6  
0.1uF  
C7  
R4  
10.0k  
10nF (2)  
10.0k  
R1  
R2  
R3  
R4  
Notes:  
VOUT1 = 0.5 1+  
VOUT2 = 0.5 1+  
(1) Additional capacitance may be required if far from supply  
(2) Optional soft-start components  
Revision: November 12, 2004  
1
www.semtech.com  

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