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LTC1436ACGN-PLL#PBF PDF预览

LTC1436ACGN-PLL#PBF

更新时间： 2024-11-23 13:09:47
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
28页 521K
描述
LTC1436A - High Efficiency Low Noise Synchronous Step-Down Switching Regulators; Package: SSOP; Pins: 24; Temperature Range: 0°C to 70°C

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LTC1436ACGN-PLL#PBF 技术参数

是否Rohs认证：符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP24,.24
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.12Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：30 V
最小输入电压：3.5 V标称输入电压：15 V
JESD-30 代码：R-PDSO-G24JESD-609代码：e3
长度：8.65 mm湿度敏感等级：1
功能数量：1端子数量：24
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SSOP24,.24封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH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
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：SINGLE最大切换频率：400 kHz
技术：CMOS温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.635 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3.9116 mm
Base Number Matches：1

LTC1436ACGN-PLL#PBF 数据手册

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LTC1436A  
LTC1436A-PLL/LTC1437A  
High Efficiency Low Noise  
Synchronous Step-Down  
Switching Regulators  
U
FEATURES  
DESCRIPTION  
The LTC®1436A/LTC1437A are synchronous step-down  
switching regulator controllers that drive external  
N-channel power MOSFETs in a phase lockable, fixed  
frequencyarchitecture.TheAdaptivePowerTM outputstage  
selectively drives two N-channel MOSFETs at frequencies  
up to 400kHz while reducing switching losses to maintain  
high efficiencies at low output currents.  
■
Maintains Constant Frequency at Low Output Currents  
■
Dual N-Channel MOSFET Synchronous Drive  
■
Programmable Fixed Frequency (PLL Lockable)  
■
Wide VIN Range: 3.5V to 36V Operation  
Low Minimum On-Time (≤300ns) for High  
■
Frequency, Low Duty Cycle Applications  
Very Low Dropout Operation: 99% Duty Cycle  
Low Dropout, 0.5A Linear Regulator for CPU I/O  
or Low Noise Audio Supplies  
■
■
An auxiliary 0.5A linear regulator using an external PNP  
pass device provides a low noise, low dropout voltage  
source. A secondary winding feedback control pin (SFB)  
guarantees regulation regardless of the load on the main  
output by forcing continuous operation.  
■
■
■
■
■
■
■
■
■
Built-In Power-On Reset Timer  
Programmable Soft Start  
Low-Battery Detector  
Remote Output Voltage Sense  
Foldback Current Limiting (Optional)  
Pin Selectable Output Voltage  
An additional comparator is available for use as a low-  
batterydetector. Apower-onresettimer(POR)isincluded  
which generates a signal delayed by 65536/fCLK (300ms  
typically) after the output is within 5% of the regulated  
output voltage. Internal resistive dividers provide pin  
selectable output voltages with remote sense capability.  
Logic Controlled Micropower Shutdown: IQ < 25µA  
Output Voltages from 1.19V to 9V  
Available in 24-Lead Narrow SSOP and 28-Lead  
SSOP Packages U  
APPLICATIONS  
The operating current level is user-programmable via an  
external current sense resistor. Wide input supply range  
allows operation from 3.5V to 30V (36V maximum).  
■
Notebook and Palmtop Computers, PDAs  
■
Cellular Telephones and Wireless Modems  
■
Portable Instruments  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Adaptive Power is a trademark of Linear Technology Corporation.  
■
Battery-Operated Devices  
■
DC Power Distribution Systems  
U
TYPICAL APPLICATION  
V
IN  
4.5V TO 22V  
C
V
OSC  
IN  
C
IN  
C
+
OSC  
M1  
Si4412DY  
22µF  
35V  
× 2  
TGL  
TGS  
43pF  
RUN/SS  
M3  
C
SS  
IRLML2803  
0.1µF  
SW  
L1  
4.7µH  
R
SENSE  
0.02Ω  
I
D
B
CMDSH-3  
TH  
V
1.6V  
5A  
OUT  
C
B
R
LTC1436A  
C
C
C
0.1µF  
10k  
INTV  
CC  
510pF  
SGND  
BOOST  
R1  
+
100pF  
C
D1  
MBRS140T3  
4.7µF  
35.7k  
OUT  
+
M2  
Si4412DY  
100µF  
6.3V  
× 2  
V
PROG  
BG  
R2  
102k  
V
OSENSE  
SENSE  
PGND  
+
–
SENSE  
1000pF  
1436 F01  
Figure 1. High Efficiency Step-Down Converter  
1
1234567...28

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