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L4955

更新时间: 2024-11-13 22:47:23
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 稳压器
页数 文件大小 规格书
14页 144K
描述
5A ULDO LINEAR REGULATORS FAMILY

L4955 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:ZFM包装说明:HEPTAWATT-7
针数:7Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.89可调性:ADJUSTABLE
最大回动电压 1:1.5 V标称回动电压 1:1.5 V
JESD-30 代码:R-PZFM-T7JESD-609代码:e0
最大电网调整率 (%/V):0.047最大负载调整率 (%):0.82%
功能数量:1输出次数:1
端子数量:7工作温度TJ-Max:125 °C
工作温度TJ-Min:最大输出电流 1:5 A
最大输出电压 1:1.298 V最小输出电压 1:1.222 V
封装主体材料:PLASTIC/EPOXY封装代码:ZIP
封装等效代码:ZIP7,.2,.1TB封装形状:RECTANGULAR
封装形式:FLANGE MOUNT峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified调节器类型:ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR
子类别:Other Regulators表面贴装:NO
技术:BCD端子面层:Tin/Lead (Sn/Pb)
端子形式:THROUGH-HOLE端子节距:1.27 mm
端子位置:ZIG-ZAG处于峰值回流温度下的最长时间:NOT SPECIFIED
Base Number Matches:1

L4955 数据手册

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L4955  
5A ULDO LINEAR REGULATORS FAMILY  
UP TO 5A OUTPUT CURRENT  
2% PRECISE OUTPUT VOLTAGES  
MULTIPOWER BCD TECHNOLOGY  
±
FAST TRANSIENT RESPONSE  
0.75V TYP. DROP OUT VOLTAGEAT 5A  
OPERATING INPUT VOLTAGEFROM 4.5V  
ADJUSTABLE VERSION:  
VO = 1.26V  
INHIBIT (IQ = 120µA TYP.)  
HEPTAWATT  
VERSAWATT  
(TO-220)  
POWER GOOD  
PROGRAMMABLECURRENT LIMIT  
OUTPUT  
VOLTAGE  
HEPTAWATT PACKAGE  
FIXED VERSION:  
ORDERING  
NUMBERS  
PACKAGE  
3.3V, 5.1V OUTPUTS  
L4955  
1.26V ADJ  
3.3V  
HEPTAWATT  
VERSAWATT  
VERSAWATT  
VERSAWATT PACKAGE  
L4955V3.3  
L4955V5.1  
VERYLOW QUIESCENT CURRENT  
SHORT CIRCUIT PROTECTION (Foldback  
function)  
5.1V  
The dropout voltage is only 0.75V (Typ.) at 5A, di-  
rectly dependenton the output current conditions.  
THERMAL SHUTDOWN  
Realized in BCDII technology, it has on board a  
charge pump to properly drive an N-channel  
APPLICATIONS  
PENTIUM AND POWER PC SUPPLIES  
power mos Transistor with 150m of R  
.
DSON  
POSTREGULATOR FOR SMPS  
LOW COST SOLUTION FOR 5V TO 3.3V  
CONVERSION  
It operates from a 4.5V minimum supply, with a  
very low quiescent current irrespective of the  
load; a minimum of 22µF output capacitor is re-  
quired for stability.  
LOW COST BATTERY CHARGER  
CONSTANT CURRENT REGULATOR  
The on-chip trimming techniques improve the pre-  
SUITABLE  
FOR  
APPLICATION WITH  
cision of the available output voltages to 2%.  
±
STANDBY FEATURE  
Ancillary functions like power good, inhibit with  
low power consumption, programmable output  
voltage and current limiting make the flexible  
heptawatt version usable in applications where  
power management, stand-by, features, post  
regulation and adjustable current generators for  
battery chargers are important.  
DESCRIPTION  
The L4955 is a family of monolithic ultra very low  
drop linear regulators designed to supply the  
most recent microprocessors.  
TYPICAL APPLICATIONS  
INH  
3
PG  
6
IN  
OUT  
ADJ  
IN  
OUT  
VIN  
1
7
5
VOUT  
VIN  
1
3
VOUT  
L4955  
R1  
L4955VXXX  
2
4
C1  
C2  
2
C1  
C2  
CL  
GND  
R2  
GND  
D97IN590  
D97IN589  
1/14  
February 1999  

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