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L5973ADTR PDF预览

L5973ADTR

更新时间: 2024-02-17 15:45:39
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管PC
页数 文件大小 规格书
14页 188K
描述
2A SWITCH STEP DOWN SWITCHING REGULATOR

L5973ADTR 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:LEAD FREE, HSOP-8针数:8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.83
模拟集成电路 - 其他类型:SWITCHING REGULATOR最大输入电压:36 V
最小输入电压:4 V标称输入电压:12 V
JESD-30 代码:R-PDSO-G8长度:4.9 mm
功能数量:1端子数量:8
最高工作温度:125 °C最低工作温度:-40 °C
最大输出电流:3.5 A封装主体材料:PLASTIC/EPOXY
封装代码:HLSOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.7 mm
表面贴装:YES切换器配置:BUCK
最大切换频率:280 kHz温度等级:AUTOMOTIVE
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:40
宽度:3.9 mmBase Number Matches:1

L5973ADTR 数据手册

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L5973AD  
2A SWITCH STEP DOWN SWITCHING REGULATOR  
1 GENERAL FEATURES  
Figure 1. Package  
2A INTERNAL SWITCH  
OPERATING INPUT VOLTAGE FROM 4.4V TO 36V  
3.3V / ( 2%) REFERENCE VOLTAGE  
OUTPUT VOLTAGE ADJUSTABLE FROM  
1.235V TO 35V  
HSOP8 (Exposed pad)  
LOW DROPOUT OPERATION: 100% DUTY  
CYCLE  
Table 1. Order Codes  
500KHz INTERNALLY FIXED FREQUENCY  
VOLTAGE FEEDFORWARD  
ZERO LOAD CURRENT OPERATION  
INTERNAL CURRENT LIMITING  
INHIBIT FOR ZERO CURRENT  
CONSUMPTION  
SYNCHRONIZATION  
PROTECTION AGAINST FEEDBACK  
DISCONNECTION  
Part Number  
L5973AD  
Package  
HSOP8  
L5973ADTR  
HSOP8 in Tape & Reel  
switching regulator with a switch current limit of 2A so  
it is able to deliver more than 1.5A DC current to the  
load depending on the application conditions.  
The output voltage can be set from 1.235V to 35V.  
The high current level is also achieved thanks to an  
SO8 package with exposed frame, that allows to re-  
THERMAL SHUTDOWN  
duce the R  
down to approximately 40°C/W  
th(j-amb)  
1.1 APPLICATIONS:  
The device uses an internal P-Channel D-MOS tran-  
sistor (with a typical of 200m ) as switching element  
to avoid the use of bootstrap capacitor and guarantee  
high efficiency.  
CONSUMER: STB, DVD, TV, VCR,CAR  
RADIO, LCD MONITORS  
NETWORKING: XDSL, MODEMS,DC-DC  
MODULES  
COMPUTER: PRINTERS, AUDIO/GRAPHIC  
CARDS, OPTICAL STORAGE, HARD DISK  
DRIVE  
INDUSTRIAL: CHARGERS, CAR BATTERY  
DC-DC CONVERTERS  
An internal oscillator fixes the switching frequency at  
500KHz to minimize the size of external components.  
Having a minimum input voltage of 4.4V only, it is  
particularly suitable for 5V bus, available in all com-  
puter related applications.  
Pulse by pulse current limit with the internal frequen-  
cy modulation offers an effective constant current  
short circuit protection.  
2 DESCRIPTION  
The L5973AD is a step down monolithic power  
Figure 2. Test and Application Circuit  
VREF  
L1 15µH  
3.3V  
VOUT=3.3V  
6
OUT  
FB  
1
5
VIN = 4.4V to 35V  
VCC  
D1  
STPS340U  
8
2
R1  
5.6K  
L5973AD  
SYNC.  
COMP  
C2  
330µF  
10V  
3
7
C1  
10µF  
35V  
4
C4  
22nF  
INH  
GND  
R2  
CERAMIC  
3.3K  
C3  
220pF  
R3  
4.7K  
D03IN1453  
Rev. 3  
1/14  
December 2004  

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