参数资料
型号: LTC1436AIGN-PLL#TR
厂商: Linear Technology
文件页数: 1/28页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 24-SSOP
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 138kHz
占空比: 99%
电源电压: 3.5 V ~ 30 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 24-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
其它名称: LTC1436AIGN-PLLTR
LTC1436A
LTC1436A-PLL/LTC1437A
High Efficiency Low Noise
Synchronous Step-Down
Switching Regulators
FEATURES
DESCRIPTIO
Maintains Constant Frequency at Low Output Currents
Programmable Fixed Frequency (PLL Lockable)
Wide V IN 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: I Q < 25 μ A
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/f CLK (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.
APPLICATIO S
The operating current level is user-programmable via an
Notebook and Palmtop Computers, PDAs
Cellular Telephones and Wireless Modems
Portable Instruments
Battery-Operated Devices
DC Power Distribution Systems
external current sense resistor. Wide input supply range
allows operation from 3.5V to 30V (36V maximum).
, 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
TYPICAL APPLICATIO
V IN
4.5V TO 22V
C OSC
43pF
C SS
0.1 μ F
R C
10k
C C
510pF
100pF
C OSC
RUN/SS
I TH
SGND
V PROG
V OSENSE
SENSE –
LTC1436A
V IN
TGL
TGS
SW
INTV CC
BOOST
BG
PGND
SENSE +
+
D B
CMDSH-3
4.7 μ F
M3
IRLML2803
C B
0.1 μ F
M1
Si4412DY
M2
Si4412DY
L1
4.7 μ H
+
D1
MBRS140T3
C IN
22 μ F
35V
× 2
R SENSE
0.02 ?
R1
35.7k
R2
102k
+
V OUT
1.6V
5A
C OUT
100 μ F
6.3V
× 2
1000pF
1436 F01
Figure 1. High Efficiency Step-Down Converter
14367afb
1
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LTC1436CGN 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
LTC1436CGN#PBF 制造商:Linear Technology 功能描述:Step-Down Switching Regulators
LTC1436CGN-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
LTC1436IGN 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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