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L6997STR PDF预览

L6997STR

更新时间: 2024-11-18 21:53:19
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 开关光电二极管控制器PC
页数 文件大小 规格书
30页 518K
描述
STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS

L6997STR 技术参数

是否Rohs认证: 符合生命周期:Obsolete
零件包装代码:TSSOP包装说明:MO-153-AC, TSSOP-20
针数:20Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:8.01Samacsys Confidence:3
Samacsys Status:ReleasedSamacsys PartID:235356
Samacsys Pin Count:20Samacsys Part Category:Integrated Circuit
Samacsys Package Category:Small Outline PackagesSamacsys Footprint Name:TSSOP20
Samacsys Released Date:2015-11-23 08:23:37Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:5.5 V
最小输入电压:3 V标称输入电压:3.3 V
JESD-30 代码:R-PDSO-G20JESD-609代码:e4
长度:6.5 mm湿度敏感等级:3
功能数量:1端子数量:20
最高工作温度:125 °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:TSSOP20,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH认证状态:Not Qualified
座面最大高度:1.2 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:PUSH-PULL
温度等级:AUTOMOTIVE端子面层:Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式:GULL WING端子节距:0.65 mm
端子位置:DUAL宽度:4.4 mm
Base Number Matches:1

L6997STR 数据手册

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L6997S  
STEP DOWN CONTROLLER  
FOR LOW VOLTAGE OPERATIONS  
Figure 1. Package  
1 Features  
FROM 3V TO 5.5V VCC RANGE  
MINIMUM OUTPUT VOLTAGE AS LOW AS  
0.6V  
1V TO 35V INPUT VOLTAGE RANGE  
CONSTANT ON TIME TOPOLOGY  
VERY FAST LOAD TRANSIENTS  
0.6V, ±1% VREF  
SELECTABLE SINKING MODE  
LOSSLESS CURRENT LIMIT, AVAILABLE  
ALSO IN SINKING MODE  
TSSOP20  
Table 1. Order Codes  
Part Number  
L6997S  
Package  
TSSOP20  
Tape & Reel  
L6997STR  
REMOTE SENSING  
3 Description  
OVP,UVP LATCHED PROTECTIONS  
600µA TYP QUIESCENT CURRENT  
POWER GOOD AND OVP SIGNALS  
PULSE SKIPPING AT LIGTH LOADS  
94% EFFICIENCY FROM 3.3V TO 2.5V  
The device is a high efficient solution for networking  
dc/dc modules and mobile applications compatible  
with 3.3V bus and 5V bus.  
It's able to regulate an output voltage as low as 0.6V.  
The constant on time topology assures fast load tran-  
sient response. The embedded voltage feed-forward  
provides nearly constant switching frequency opera-  
tion in spite of a wide input voltage range.  
An integrator can be introduced in the control loop to  
reduce the static output voltage error.  
The remote sensing improves the static and dynamic  
regulation, recovering the wires voltage drop.  
Pulse skipping technique reduces power consump-  
tion at light loads. Drivers current capability allows  
output currents in excess of 20A.  
2 Applications  
NETWORKING  
DC/DC MODULES  
DISTRIBUTED POWER  
MOBILE APPLICATIONS  
CHIP SET, CPU, DSP AND MEMORIES  
SUPPLY  
Figure 2. Minimum Component Count Application  
3.3V  
Rin2  
Rin1  
Cin  
OSC  
Dboot  
BOOT  
HGATE  
HS  
LS  
Cboot  
L
0.6V  
PHASE  
LGATE  
PGOOD  
OVP  
Ro1  
DS  
Cout  
L6997S  
Ro2  
PGND  
ILIM  
GND  
GNDSENSE  
Rilim  
VSENSE  
SS  
Css  
INT  
VFB  
Vref  
SHDN  
Cvref  
REV. 1  
1/30  
June 2004  

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