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參數資料
| 型號： | LT1171 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
| 中文描述： | 射頻放大器 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 275K |
| 代理商： | LT1171 |
1
LT1170/LT1171/LT1172
100kHz, 5A, 2.5A and 1.25A
High Efficiency Switching Regulators
I
Wide Input Voltage Range: 3V to 60V
I
Low Quiescent Current: 6mA
I
I
nternal 5A Switch (2.5A for LT1171,
1.25A for LT1172)
I
Shutdown Mode Draws Only 50
μ
A Supply Current
I
Very Few External Parts Required
I
Self-Protected Against Overloads
I
Operates in Nearly All Switching Topologies
I
Flyback-Regulated Mode Has Fully Floating Outputs
I
Comes in Standard 5-Pin Packages
I
LT1172 Available in 8-Pin MiniDIP and Surface Mount
Packages
I
Can Be Externally Synchronized
The LT
1170/LT1171/LT1172 are monolithic high power
switching regulators. They can be operated in all standard
switching configurations including buck, boost, flyback,
forward, inverting and “Cuk.” A high current, high effi-
ciency switch is included on the die along with all oscilla-
tor, control and protection circuitry. Integration of all
functions allows the LT1170/LT1171/LT1172 to be built in
a standard 5-pin TO-3 or TO-220 power package as well as
the 8-pin packages (LT1172). This makes them extremely
easy to use and provides “bust proof” operation similar to
that obtained with 3-pin linear regulators.
The LT1170/LT1171/LT1172 operate with supply volt-
ages from 3V to 60V, and draw only 6mA quiescent
current. They can deliver load power up to 100W with no
external power devices. By utilizing current-mode switch-
ing techniques, they provide excellent AC and DC load and
line regulation.
The LT1170/LT1171/LT1172 have many unique features
not found even on the vastly more difficult to use low
power control chips presently available. They use adaptive
antisat switch drive to allow very wide ranging load cur-
rents with no loss in efficiency. An externally activated
shutdown mode reduces total supply current to 50
μ
A
typically for standby operation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
SwitcherCAD is a trademark of Linear Technology Corporation.
Boost Converter (5V to 12V)
Maximum Output Power*
I
Logic Supply 5V at 10A
I
5V Logic to
±
15V Op Amp Supply
I
Battery Upconverter
I
Power Inverter (+ to –) or (– to +)
I
Fully Floating Multiple Outputs
USER NOTE:
This data sheet is only intended to provide specifications, graphs, and a general functional description
of the LT1170/LT1171/LT1172. Application circuits are included to show the capability of the
LT1170/LT1171/LT1172. A complete design manual (AN19) should be obtained to assist in
developing new designs. This manual contains a comprehensive discussion of both the LT1070 and
the external components used with it, as well as complete formulas for calculating the values of these
components. The manual can also be used for the LT1170/LT1171/LT1172 by factoring in the higher
frequency. A CAD design program called SwitcherCAD
TM
is also available.
DESCRIPTIOU
FEATURES
APPLICATIU
TYPICAL APPLICATIO
U
1170/1/2 TA01
D1
MBR330
C2
1000
μ
F
C1
1
μ
F
R1
10.7k
1%
R2
1.24k
1%
LT1170
GND
V
IN
5V
R3
1k
*REQUIRED IF INPUT LEADS
≥
2"
** COILTRONICS 50-2-52
PULSE ENGINEERING 92114
V
SW
FB
V
C
OUTPUT
FILTER
L2
10
μ
H
L1**
50
μ
H
C3
100
μ
F
12V
1A
C3*
100
μ
F
+
+
INPUT VOLTAGE (V)
0
P
*
100
80
60
40
20
0
40
LT1170/1/2 TA02
10
20
30
50
*
ROUGH GUIDE ONLY. BUCK MODE
P
= (5A)(V
)
SPECIAL TOPOLOGIES DELIVER
MORE POWER.
** DIVIDE VERTICAL POWER SCALE
BY TWO FOR LT1171, BY FOUR
FOR LT1172.
BOOST
BUCK-BOOST
V
O
= 30V
FLYBACK
BUCK-BOOST
V
O
= 5V
LT1170
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| LT1171C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators |
| LT1171CK | 制造商:LINER 制造商全稱:Linear Technology 功能描述:100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators |
| LT1171CQ | 功能描述:IC REG MULTI CONFIG ADJ D2PAK RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT1171CQ#PBF | 功能描述:IC REG MULTI CONFIG ADJ D2PAK RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關:2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT1171CQ#TR | 功能描述:IC REG MULTI CONFIG ADJ D2PAK RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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