參數(shù)資料
型號： LTC1775CS
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Quadruple 2-Input Positive-NAND Gate 14-SOIC -40 to 85
中文描述： 2 A SWITCHING CONTROLLER, 165 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.150 INCH, PLASTIC, SO-16
文件頁數(shù)： 1/24頁
文件大小： 289K
代理商： LTC1775CS
1
LTC1775
DESCRIPTIOU
The LTC
1775 is a synchronous step-down switching
regulator controller that drives external N-channel power
MOSFETs using few external components. Current mode
control with MOSFET V
DS
sensing eliminates the need for
a sense resistor and improves efficiency. Largely similar
to the LTC1625, the LTC1775 has twice the maximum
sense voltage for high current applications. The frequency
of a nominal 150kHz internal oscillator can be synchro-
nized to an external clock over a 1.5:1 frequency range.
Burst Mode
TM
operation at low load currents reduces
switching losses and low dropout operation extends oper-
ating time in battery-powered systems. A forced continu-
ous mode control pin can assist secondary winding
regulation by disabling Burst Mode operation when the
main output is lightly loaded.
Fault protection is provided by foldback current limiting
and an output overvoltage comparator. An external ca-
pacitor attached to the RUN/SS pin provides soft start
capability for supply sequencing. A wide supply range
allows operation from 4V (4.3V for LTC1775I) to 36V at the
input and 1.19V to V
IN
at the output.
FEATURES
APPLICATIU
TYPICAL APPLICATIO
N
U
High Power
TM
Current Mode
No R
SENSE
Synchronous Step-Down
Switching Regulator
I
Highest Efficiency Current Mode Controller
I
No Sense Resistor Required
I
300mV Maximum Current Sense Voltage
I
Stable High Current Operation
I
Dual N-Channel MOSFET Synchronous Drive
I
Wide V
IN
Range: 4V to 36V
I
Wide V
OUT
Range: 1.19V to V
IN
I
±
1% 1.19V Reference
I
Programmable Fixed Frequency with Injection Lock
I
Very Low Drop Out Operation: 99% Duty Cycle
I
Forced Continuous Mode Control Pin
I
Optional Programmable Soft Start
I
Pin Selectable Output Voltage
I
Foldback Current Limit
I
Output Overvoltage Protection
I
Logic Controlled Micropower Shutdown: I
Q
< 30
μ
A
I
Available in 16-Lead Narrow SSOP and SO Packages
Figure 1. High Efficiency Step-Down Converter
Efficiency vs Load Current
I
Notebook Computers
I
Automotive Electronics
I
Battery Chargers
I
Distributed Power Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
No R
SENSE
and Burst Mode are trademarks of Linear Technology Corporation.
+
V
IN
TK
SYNC
LTC1775
RUN/SS
V
OSENSE
TG
SW
C
B
0.33
μ
F
D
CMDSH-3
C
C
2.2nF
R
C
10k
M2
SUD50N03-10
D1
MBRS340
M1
SUD50N03-10
C
VCC
4.7
μ
F
1775 F01
L1
6
μ
H
C
IN
22
μ
F
30V
×
4
BOOST
INTV
CC
BG
V
PROG
I
TH
SGND
PGND
+
C
OUT
680
μ
F
6.3V
V
3.3V
10A
V
5V TO
28V
C
SS
0.1
μ
F
+
LOAD CURRENT (A)
0.01
70
E
90
95
100
0.1
1
10
1775 F01b
85
80
75
V
= 10V
f = 150kHz
FCB = INTV
CC
V
OUT
= 5V
V
OUT
= 3.3V
相關PDF資料
PDF描述
LTC1775I Quadruple 2-Input Positive-NAND Gate 14-SOIC -40 to 85
LTC1775IS Quadruple 2-Input Positive-NAND Gate 14-SOIC -40 to 85
LTC1775 High Power Current Mode Synchronous Step-Down Switching Regulator(大功率，同步電流模式步降開關穩(wěn)壓器)
LTC1778-1 Wide Operating Range, No RSENSE Step-Down Controller
LTC1778 Wide Operating Range, No RSENSE Step-Down Controller
相關代理商/技術參數(shù)
參數(shù)描述
LTC1775CS#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® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
LTC1775CS#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
LTC1775CS#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
LTC1775IGN 功能描述:IC REG CTRLR BUCK PWM CM 16-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
LTC1775IGN#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:- 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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