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

LT1507CS8-3.3#PBF

更新时间： 2024-01-01 08:08:56
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
LT1507 - 500kHz Monolithic Buck Mode Switching Regulator; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C

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中文翻译

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LT1507CS8-3.3#PBF 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：SOP,
针数：8Reach Compliance Code：compliant
风险等级：5.08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 V
JESD-30 代码：R-PDSO-G8JESD-609代码：e3
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
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.75 mm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：Matte Tin (Sn)
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：30
宽度：3.9 mmBase Number Matches：1

LT1507CS8-3.3#PBF 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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LT1507CS8-3.3#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT1507CS8-3.3#TRPBF Linear

类似代替

 LT1507 - 500kHz Monolithic Buck Mode Switching Regulator; Package: SO; Pins: 8; Temperatur
LT1507IS8-3.3#TRPBF Linear

类似代替

 LT1507 - 500kHz Monolithic Buck Mode Switching Regulator; Package: SO; Pins: 8; Temperatur
LT1507CS8-3.3#TR Linear

功能相似

 LT1507 - 500kHz Monolithic Buck Mode Switching Regulator; Package: SO; Pins: 8; Temperatur

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