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參數(shù)資料
| 型號： | LTC1435ACG#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency Low Noise Synchronous Step-Down Switching Regulator |
| 中文描述： | 2 A SWITCHING CONTROLLER, 138 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 355K |
| 代理商： | LTC1435ACG#TRPBF |
1
LTC1435A
High Efficiency Low Noise
Synchronous Step-Down
Switching Regulator
Figure 1. High Efficiency Step-Down Converter
FEATURES
DESCRIPTION
U
s
Dual N-Channel MOSFET Synchronous Drive
s
Programmable Fixed Frequency
s
Wide VIN Range: 3.5V to 36V Operation
s
Low Minimum On-Time (
≤300ns) for High
Frequency, Low Duty Cycle Applications
s
Very Low Dropout Operation: 99% Duty Cycle
s
Low Standby Current
s
Secondary Feedback Control
s
Programmable Soft Start
s
Remote Output Voltage Sense
s
Logic Controlled Micropower Shutdown: IQ < 25A
s
Foldback Current Limiting (Optional)
s
Current Mode Operation for Excellent Line and Load
Transient Response
s
Output Voltages from 1.19V to 9V
s
Available in 16-Lead Narrow SO and SSOP Packages
The LTC
1435A is a synchronous step-down switching
regulator controller that drives external N-channel power
MOSFETs using a fixed frequency architecture. A wide
duty cycle range of 5% to 99% allows high VIN to low VOUT
DC/DC conversion, as well as low dropout operation that
extends operating time in battery-operated systems. Burst
Mode
TM operation provides high efficiency at low load
currents.
The operating frequency is set by an external capacitor
allowing maximum flexibility in optimizing efficiency. A
secondary winding feedback control pin, SFB, guarantees
regulation regardless of load on the main output by
forcing continuous operation. Burst Mode operation is
inhibited when the SFB pin is pulled low, which reduces
noise and RF interference.
Soft start is provided by an external capacitor that can be
used to properly sequence supplies. The operating cur-
rent level is user-programmable via an external current
sense resistor. Wide input supply range allows operation
from 3.5V to 30V (36V maximum).
s
Notebook and Palmtop Computers, PDAs
s
Cellular Telephones and Wireless Modems
s
Portable Instruments
s
Battery-Operated Devices
s
DC Power Distribution Systems
APPLICATIONS
U
TYPICAL APPLICATION
U
Burst Mode is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ITH
TG
COSC
43pF
CC
330pF
100pF
RC
10k
CSS
0.1
F
SENSE–
SENSE+
LTC1435A
1000pF
+
4.7
F
DB
CMDSH-3
CB
0.1
F
M2
Si4412DY
D1
MBRS140T3
L1
4.7
H
M1
Si4412DY
RSENSE
0.033
+
CIN
22
F
35V
× 2
VIN
4.5V TO 22V
+
COUT
100
F
6.3V
× 2
R1
35.7k
R2
102k
VOUT
1.6V/3A
PGND
BG
COSC
VIN
VOSENSE
BOOST
1435A F01
SGND
RUN/SS
SW
INTVCC
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| LTC1435ACS#PBF | High Efficiency Low Noise Synchronous Step-Down Switching Regulator |
| LTC1435ACS#TRPBF | High Efficiency Low Noise Synchronous Step-Down Switching Regulator |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1435ACS | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC 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 |
| LTC1435ACS#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 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:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LTC1435ACS#TR | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC 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 |
| LTC1435ACS#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 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 |
| LTC1435ACSPBF | 制造商:Linear Technology 功能描述:Step down switching regulator,LTC1435CS |
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