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LTC1436ACGN PDF预览

LTC1436ACGN

更新时间: 2024-11-22 22:57:35
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
High Efficiency Low Noise Synchronous Step-Down Switching Regulators

LTC1436ACGN 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:SSOP包装说明:SSOP, SSOP24,.24
针数:24Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.11其他特性:ALSO OPERATES IN ADJUSTABLE MODE FROM 1.19 TO 9V
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:36 V
最小输入电压:3.6 V标称输入电压:15 V
JESD-30 代码:R-PDSO-G24JESD-609代码:e0
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:
最大输出电流:2 A标称输出电压:5 V
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):235
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:PUSH-PULL最大切换频率:240 kHz
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)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:20宽度:3.9 mm
Base Number Matches:1

LTC1436ACGN 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

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