參數(shù)資料
型號： LTC1436A-PLL
廠商： Linear Technology Corporation
元件分類： 基準電壓源/電流源
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 抗輻射高效，5安培開關穩(wěn)壓器
文件頁數(shù)： 1/28頁
文件大小： 518K
代理商： LTC1436A-PLL
1
LTC1436A
LTC1436A-PLL/LTC1437A
High Efficiency Low Noise
Synchronous Step-Down
Switching Regulators
DESCRIPTIO
N
U
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.
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).
Figure 1. High Efficiency Step-Down Converter
FEATURES
I
Maintains Constant Frequency at Low Output Currents
I
Dual N-Channel MOSFET Synchronous Drive
I
Programmable Fixed Frequency (PLL Lockable)
I
Wide V
IN
Range: 3.5V to 36V Operation
I
Low Minimum On-Time (
≤
300ns) for High
Frequency, Low Duty Cycle Applications
I
Very Low Dropout Operation: 99% Duty Cycle
I
Low Dropout, 0.5A Linear Regulator for CPU I/O
or Low Noise Audio Supplies
I
Built-In Power-On Reset Timer
I
Programmable Soft Start
I
Low-Battery Detector
I
Remote Output Voltage Sense
I
Foldback Current Limiting (Optional)
I
Pin Selectable Output Voltage
I
Logic Controlled Micropower Shutdown: I
Q
< 25
μ
A
I
Output Voltages from 1.19V to 9V
I
Available in 24-Lead Narrow SSOP and 28-Lead
SSOP Packages
APPLICATIO
S
U
I
Notebook and Palmtop Computers, PDAs
I
Cellular Telephones and Wireless Modems
I
Portable Instruments
I
Battery-Operated Devices
I
DC Power Distribution Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
Adaptive Power is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
N
U
C
OSC
RUN/SS
V
IN
TGL
V
PROG
V
OSENSE
+
+
+
V
4.5V TO 22V
C
B
0.1
μ
F
4.7
μ
F
1000pF
LTC1436A
M1
Si4412DY
L1
4.7
μ
H
R
0.02
C
OUT
100
μ
F
6.3V
×
2
R1
35.7k
R2
102k
C
IN
22
μ
F
35V
×
2
C
43pF
C
SS
0.1
μ
F
C
510pF
100pF
R
C
10k
V
1.6V
5A
M2
Si4412DY
D1
MBRS140T3
SENSE
+
SENSE
–
SGND
M3
IRLML2803
D
CMDSH-3
TGS
SW
BOOST
BG
PGND
1436 F01
INTV
CC
I
TH
相關PDF資料
PDF描述
LTC1436ACGN RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1436AIGN RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1437A RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1437ACG RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1437AIG Dual, Micropower, Push-Pull Outputs, LinCMOS(TM) Voltage Comparator 8-SOIC 0 to 70
相關代理商/技術參數(shù)
參數(shù)描述
LTC1436CGN 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱: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 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC1436IGN 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC1436IGN-PLL 功能描述:IC REG CTRLR BUCK PWM CM 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
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