參數(shù)資料
型號(hào)： LTC1266CS
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Synchronous Regulator Controller for N- or P-Channel MOSFETs
中文描述： SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.150 INCH, PLASTIC, SO-16
文件頁(yè)數(shù)： 1/20頁(yè)
文件大?。?/td> 361K
代理商： LTC1266CS
1
LTC1266
LTC1266-3.3/LTC1266-5
Synchronous Regulator
Controller for
N- or P-Channel MOSFETs
U
ESCRIPTIO
The LTC
1266 series is a family of synchronous switching
regulator controllers featuring automatic Burst Mode
TM
operation to maintain high efficiencies at low output
currents. These devices drive external power MOSFETs at
switching frequencies up to 400kHz using a constant off-
time current mode architecture providing constant ripple
current in the inductor. They can drive either an N-channel
or a P-channel topside MOSFET.
The operating current level is user-programmable via an
external current sense resistor. Wide input supply range
allows operation from 3.5V to 18V (20V maximum).
Constant off-time architecture provides low dropout regu-
lation limited only by the R
DS(ON)
of the topside MOSFET
(when using the P-channel) and the resistance of the
inductor and current sense resistor.
The LTC1266 series combines synchronous switching for
maximum efficiency at high currents with an automatic
low current operating mode, called Burst Mode
operation,
which reduces switching losses. Standby power is re-
duced to only 1mW at V
IN
= 5V (at I
OUT
= 0). Load currents
in Burst Mode
operation are typically 0mA to 500mA.
S
FEATURE
D
I
Ultra-High Efficiency: Over 95% Possible
I
Drives N-Channel MOSFET for High Current or
P-Channel MOSFET for Low Dropout
I
Pin Selectable Burst Mode Operation
I
1% Output Accuracy (LTC1266A)
I
Pin Selectable Phase of Topside Driver for Boost
or Step-Down Operation
I
Wide V
IN
Range: 3.5V to 20V
I
On-Chip Low-Battery Detector
I
High Efficiency Maintained over Large Current Range
I
Low 170
μ
A Standby Current at Light Loads
I
Current Mode Operation for Excellent Line and Load
Transient Response
I
Logic Controlled Micropower Shutdown: I
Q
< 40
μ
A
I
Short Circuit Protection
I
Synchronous Switching with Nonoverlaping Gate Drives
I
Available in 16-Pin Narrow SO Package
U
S
A
O
PPLICATI
, 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
LTC1266-3.3 Efficiency
LOAD CURRENT (A)
0.01
80
E
85
90
95
100
0.1
5
1
LTC1266 TA02
V
IN
= 5V
0V = NORMAL
>1.5V = SHUTDOWN
N-CHANNEL
Si9410
+
C
IN
100
μ
F
×
2
L*
5
μ
H
D2
MBR0530T1
R
0.02
100k
V
3.3V
5A
LOW BAT OUT
V
IN
4V TO 9V
I
TH
C
T
BINH
SGND
C
T
180pF
C
3300pF
R
C
470
+
C
OUT
330
μ
F
×
2
D1
MBRS130LT3
LTC1266 TA01
BDRIVE
PGND
N-CHANNEL
Si9410
V
IN
PWR V
IN
LB
OUT
LB
IN
PINV
LTC1266-3.3
SHDN
SENSE
+
TDRIVE
SENSE
–
1000pF
C
B
0.1
μ
F
*COILTRONICS CTXO212801
LOW BAT IN
I
Notebook and Palmtop Computers
I
Portable Instruments
I
Cellular Telephones
I
DC Power Distribution Systems
I
GPS Systems
U
A
O
PPLICATI
TYPICAL
相關(guān)PDF資料
PDF描述
LTC1266CS-3.3 Synchronous Regulator Controller for N- or P-Channel MOSFETs
LTC1266CS-5 Synchronous Regulator Controller for N- or P-Channel MOSFETs
LTC1267- ADJ 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
LTC1267- ADJ5 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
LTC1267-ADJ5 Circular Connector; No. of Contacts:37; Series:LJT06R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-35
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1266CS#PBF 功能描述:IC REG CTRLR BST 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(biāo)準(zhǔn)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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 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(yè)面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
LTC1266CS#TR 功能描述:IC REG CTRLR BST 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(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR)
LTC1266CS#TRPBF 功能描述:IC REG CTRLR BST 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(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR)
LTC1266CS-3.3 功能描述:IC REG CTRLR BST 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(biāo)準(zhǔn)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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 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
LTC1266CS-3.3#PBF 功能描述:IC REG CTRLR BST 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(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無(wú) 升壓:是 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR)
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