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Datasheet > 电源电路 > 开关式稳压器或控制器> LT1507CS8-3.3
LT1507CS8-3.3 PDF预览

LT1507CS8-3.3

更新时间： 2024-11-10 22:55:51
品牌 Logo 应用领域
凌特 - Linear 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
页数 文件大小 规格书
20页 346K
描述
500kHz Monolithic Buck Mode Switching Regulator

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中文翻译

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LT1507CS8-3.3 技术参数

是否Rohs认证：不符合生命周期：Transferred
零件包装代码：SOIC包装说明：0.150 INCH, PLASTIC, SO-8
针数：8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.06Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
最大输入电压：15 V最小输入电压：4.3 V
标称输入电压：5 VJESD-30 代码：R-PDSO-G8
JESD-609代码：e0长度：4.9 mm
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：70 °C
最低工作温度：最大输出电流：3 A
标称输出电压：3.3 V封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：235认证状态：Not Qualified
座面最大高度：1.75 mm子类别：Switching Regulator or Controllers
最大供电电流 (Isup)：5.4 mA表面贴装：YES
切换器配置：BUCK最大切换频率：570 kHz
技术：BIPOLAR温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)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：20宽度：3.9 mm
Base Number Matches：1

LT1507CS8-3.3 数据手册

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LT1507  
500kHz Monolithic  
Buck Mode Switching Regulator  
FEATURES  
■
with all the necessary oscillator, control and logic cir-  
cuitry. High switching frequency allows a considerable  
reductioninthesizeofexternalcomponents.Thetopology  
is current mode for fast transient response and good loop  
stability. Both fixed output voltage (3.3V) and adjustable  
parts are available.  
Constant 500kHz Switching Frequency  
■
Uses All Surface Mount Components  
■
Operates with Inputs as Low as 4V  
Saturated Switch Design (0.3Ω)  
Cycle-by-Cycle Current Limiting  
Easily Synchronizable  
Inductor Size as Low as 2µH  
Shutdown Current: 20µA  
■
■
■
■
■
A special high speed bipolar process and new design  
techniques allow this regulator to achieve high efficiency  
at a high switching frequency. Efficiency is maintained  
over a wide output current range by keeping quiescent  
supply current to 4mA and by utilizing a supply boost  
capacitor to allow the NPN power switch to saturate. A  
shutdown signal will reduce supply current to 20µA. The  
LT1507 can be externally synchronized from 570kHz to  
1MHz with logic level inputs.  
U
APPLICATIONS  
■
Portable Computers  
Battery-Powered Systems  
Battery Charger  
Distributed Power  
■
■
■
U
The LT1507 fits into standard 8-pin SO and PDIP pack-  
ages. Temperature rise is kept to a minimum by the high  
efficiency design. Full cycle-by-cycle short-circuit protec-  
tionandthermalshutdownareprovided.Standardsurface  
mount external parts are used including the inductor and  
capacitors.  
DESCRIPTION  
TheLT®1507isa500kHzmonolithicbuckmodeswitching  
regulator, functionally identical to the LT1375 but opti-  
mized for lower input voltage applications. It will operate  
over a 4V to 15V input range, compared with 5.5V to 25V  
for the LT1375. A 1.5A switch is included on the die along  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
5V to 3.3V Volt Down Converter  
5V to 3.3V Efficiency  
100  
D2†  
1N914  
V
IN  
V
OUT  
= 5V  
= 3.3V  
90  
80  
70  
60  
50  
C2  
0.1µF  
BOOST  
OUTPUT  
3.3V  
5V  
V
IN  
V
SW  
L1***  
5µH  
1.25A  
LT1507-3.3  
C3*  
47µF  
16V  
+
DEFAULT  
(OPEN)  
= ON  
SHDN  
GND  
SENSE  
TANTALUM  
V
C
C1**  
100µF  
10V  
D1  
1N5818  
+
C
C
3.3nF  
TANTALUM  
AVX TPSD477M016R0150 OR SPRAGUE 593D EQUIVALENT.  
RIPPLE CURRENT RATING ≥ 0.6A  
*
0
0.25  
0.50  
0.75  
1.00  
1.25  
AVX TPSD108M010R0100 OR SPRAGUE 593D EQUIVALENT  
COILTRONICS CTX5-1. SUBSTITUTION UNITS SHOULD BE RATED  
AT ≥ 1.25A, USING LOW LOSS CORE MATERIAL  
**  
***  
LOAD CURRENT (A)  
LT1507 • TA02  
†
SEE BOOST PIN CONSIDERATIONS IN APPLICATIONS INFORMATION  
SECTION FOR ALTERNATIVE D2 CONNECTION  
1
1234567...20

中文翻译

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