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| 型號(hào)： | LTC1147LCS8-3.3 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | OCTAL BUS TRANSCEIVER O.C. 20-SOIC 0 to 70 |
| 中文描述： | SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大?。?/td> | 204K |
| 代理商： | LTC1147LCS8-3.3 |
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1
LTC1147-3.3
LTC1147-5/LTC 1147L
High Efficiency Step-Down
Switching Regulator C ontrollers
Figure 1. High Efficiency Step-Down Converter
U
A
O
PPLICATI
TYPICAL
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode
is a trademark of Linear Technology Corporation.
*LTC1147L and LTC1147L-3.3 only.
0V = NORMAL
>1.5V = SHUTDOWN
P-CHANNEL
Si4431DY
+
1
μ
F
L*
50
μ
H
R
**
0.05
V
OUT
5V/2A
+
C
100
μ
F
V
IN
(5.2V TO 14V)
I
TH
C
T
C
470pF
C
3300pF
R
C
1k
+
C
390
μ
F
D1
MBRD330
LT1147 F01
GND
V
IN
PDRIVE
LTC1147-5
SHDN
SENSE
+
SENSE
–
1000pF
COILTRONICS CTX50-2-MP
KRL SL-1-C1-0R050J
**
*
LOAD CURRENT (A)
0.001
70
E
90
95
100
0.01
0.1
1
LT1147 TA01
85
80
75
V
IN
= 6V
V
IN
= 10V
LTC1147-5 Efficiency
I
Very High Efficiency: Over 95% Possible
I
Wide V
IN
Range: 3.5V* to 16V
I
Current Mode Operation for Excellent Line and Load
Transient Response
I
High Efficiency Maintained Over Three Decades of
Output Current
I
Low 160
μ
A Standby Current at Light Loads
I
Logic Controlled Micropower Shutdown: I
Q
< 20
μ
A
I
Short-Circuit Protection
I
Very Low Dropout Operation: 100% Duty Cycle
I
High Efficiency in a Small Amount of Board Space
I
Output Can Be Externally Held High in Shutdown
I
Available in 8-Pin SO Package
The LTC
1147 series are step-down switching regulator
controllers featuring automatic Burst Mode
TM
operation to
maintain high efficiencies at low output currents. These
devices drive an external P-channel power MOSFET at
switching frequencies exceeding 400kHz using a constant
off-time current mode architecture providing constant
ripple current in the inductor.
The operating current level is user-programmable via an
external current sense resistor. Wide input supply range
allows operation from 3.5V* to 14V (16V maximum).
Constant off-time architecture provides low dropout regu-
lation limited by only the R
DS(ON)
of the external MOSFET
and resistance of the inductor and current sense resistor.
The LTC1147 series incorporates automatic power saving
Burst Mode
operation to reduce switching losses when
load currents drop below the level required for continuous
operation. Standby power is reduced to only 2mW at
V
IN
= 10V (at I
OUT
= 0). Load currents in Burst Mode
operation are typically 0mA to 300mA.
For applications where even higher efficiency is required,
refer to the LTC1148 data sheet and Application Note 54.
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
I
Notebook and Palmtop Computers
I
Portable Instruments
I
Battery-Operated Digital Devices
I
Cellular Telephones
I
DC Power Distribution Systems
I
GPS Systems
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1147C | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC1147CN8-3.3 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC1147CN8-5 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC1147CS8-3.3 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC1147CS8-5 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1147LIS8 | 功能描述:IC REG CTRLR BUCK PWM CM 8-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) |
| LTC1147LIS8#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 8-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) |
| LTC1147LIS8#TR | 功能描述:IC REG CTRLR BUCK PWM CM 8-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) |
| LTC1147LIS8#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 8-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) |
| LTC1148 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Synchronous Step-Down Switching Regulators |
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