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参数资料
型号： LTC1436AEGN#PBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 2 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO24
封装： 0.150 INCH, PLASTIC, SSOP-24
文件页数： 1/28页
文件大小： 493K
代理商： LTC1436AEGN#PBF
1
LTC1436A
LTC1436A-PLL/LTC1437A
14367afb
High Efficiency Low Noise
Synchronous Step-Down
Switching Regulators
Figure 1. High Efficiency Step-Down Converter
■ Maintains Constant Frequency at Low Output Currents
■ 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
■
Dual N-Channel MOSFET Synchronous Drive
■ Very Low Dropout Operation: 99% Duty Cycle
■ Low Dropout, 0.5A Linear Regulator for CPU I/O
or Low Noise Audio Supplies
■ Built-In Power-On Reset Timer
■ Programmable Soft Start
■ Low-Battery Detector
■ Remote Output Voltage Sense
■ Foldback Current Limiting (Optional)
■ Pin Selectable Output Voltage
■ Logic Controlled Micropower Shutdown: IQ < 25A
■ Output Voltages from 1.19V to 9V
■ Available in 24-Lead Narrow SSOP and 28-Lead
SSOP Packages
The LTC
1436A/LTC1437A are synchronous step-down
switching regulator controllers that drive external
N-channel power MOSFETs in a phase lockable, fixed
frequency architecture. The Adaptive Power
TM output stage
selectively drives two N-channel MOSFETs at frequencies
up to 400kHz while reducing switching losses to maintain
high efficiencies at low output currents.
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.
An additional comparator is available for use as a low-
battery detector. A power-on reset timer (POR) is included
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.
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
■ Battery-Operated Devices
■ DC Power Distribution Systems
COSC
RUN/SS
VIN
VPROG
+
VIN
4.5V TO 22V
CB
0.1
F
4.7
F
1000pF
LTC1436A
M1
Si4412DY
L1
4.7
H
RSENSE
0.02
COUT
100
F
6.3V
×2
R1
35.7k
R2
102k
CIN
22
F
35V
×2
COSC
43pF
CSS
0.1
F
CC
510pF
100pF
RC
10k
VOUT
1.6V
5A
M2
Si4412DY
D1
MBRS140T3
SENSE+
SENSE–
SGND
M3
IRLML2803
DB
CMDSH-3
TGL
TGS
SW
BOOST
BG
PGND
1436 F01
INTVCC
ITH
VOSENSE
, LTC and LT are registered trademarks of Linear Technology Corporation.
Adaptive Power is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5481178, 6304066, 5929620, 6580258,
5705919, 5731731
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
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相关代理商/技术参数
参数描述
LTC1436AIGN 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC1436AIGN#PBF 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC1436AIGN#TR 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC1436AIGN#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
LTC1436AIGN-PLL 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX
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