參數資料
型號： LTC1435CG
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, 400 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.209 INCH, PLASTIC, SSOP-16
文件頁數： 1/20頁
文件大小： 404K
代理商： LTC1435CG
1
LTC1435
High Efficiency Low Noise
Synchronous Step-Down
Switching Regulator
DESCRIPTIO
N
U
The LTC
1435 is a synchronous step-down switching
regulator controller that drives external N-channel power
MOSFETs using a fixed frequency architecture. Burst
Mode
TM
operation provides high efficiency at low load
currents. A maximum duty cycle limit of 99% provides low
dropout operation which extends operating time in bat-
tery-operated systems.
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 which can
be used to properly sequence supplies. 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).
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
Figure 1. High Efficiency Step-Down Converter
FEATURES
I
Dual N-Channel MOSFET Synchronous Drive
I
Programmable Fixed Frequency
I
Wide V
IN
Range: 3.5V to 36V Operation
I
Ultrahigh Efficiency
I
Very Low Dropout Operation: 99% Duty Cycle
I
Low Standby Current
I
Secondary Feedback Control
I
Programmable Soft Start
I
Remote Output Voltage Sense
I
Logic Controlled Micropower Shutdown: I
Q
< 25
μ
A
I
Foldback Current Limiting (Optional)
I
Current Mode Operation for Excellent Line and Load
Transient Response
I
Output Voltages from 1.19V to 9V
I
Available in 16-Lead Narrow SO and 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
TYPICAL APPLICATIO
N
U
I
TH
TG
C
68pF
C
330pF
R
C
10k
100pF
C
SS
0.1
μ
F
SENSE
–
SENSE
+
LTC1435
1000pF
+
4.7
μ
F
D
CMDSH-3
C
B
0.1
μ
F
M2
Si4412DY
D1
MBRS140T3
L1
10
μ
H
M1
Si4412DY
R
SENSE
0.033
+
C
IN
22
μ
F
35V
×
2
V
4.5V TO 28V
+
C
OUT
100
μ
F
10V
×
2
R1
32.4k
R2
22.1k
V
2.9V/3.5A
PGND
BG
C
OSC
V
IN
V
OSENSE
BOOST
1435 F01
SGND
RUN/SS
SW
INTV
CC
相關PDF資料
PDF描述
LTC1435CS High Efficiency Low Noise Synchronous Step-Down Switching Regulator
LTC1435I High Efficiency Low Noise Synchronous Step-Down Switching Regulator
LTC1435IS High Efficiency Low Noise Synchronous Step-Down Switching Regulator
LTC1435IG High Efficiency Low Noise Synchronous Step-Down Switching Regulator
LTC1435 High Efficiency Low Noise Synchronous Step-Down Switching Regulator(高效率，低噪聲，同步步降開關穩(wěn)壓器)
相關代理商/技術參數
參數描述
LTC1435CG#PBF 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP 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: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® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
LTC1435CG#TR 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Sync Step Down 3.5V to 36V Input 16-Pin SSOP T/R
LTC1435CG#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 16-SSOP 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: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
LTC1435CS 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:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 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:24-WQFN 裸露焊盤 包裝:帶卷 (TR)
LTC1435CS#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:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數: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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