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參數資料
| 型號： | LT1074 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Quadruple 1-of-2 Data Selectors/Multiplexers 16-SOIC 0 to 70 |
| 中文描述： | 降壓型開關穩壓器 |
| 文件頁數： | 1/16頁 |
| 文件大?。?/td> | 215K |
| 代理商： | LT1074 |
LT1074/LT1076
1
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIOU
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
Step-Down Switching
Regulator
The LT
1074 is a 5A (LT1076 is rated at 2A) monolithic
bipolar switching regulator which requires only a few
external parts for normal operation. The power switch, all
oscillator and control circuitry, and all current limit com-
ponents, are included on the chip. The topology is a classic
I
Buck Converter with Output Voltage Range of 2.5V
to 50V
I
Tapped-Inductor Buck Converter with 10A Output
at 5V
I
Positive-to-Negative Converter
I
Negative Boost Converter
I
Multiple Output Buck Converter
I
5A Onboard Switch (LT1074)
I
100kHz Switching Frequency
I
Greatly Improved Dynamic Behavior
I
Available in Low Cost 5 and 7-Lead Packages
I
Only 8.5mA Quiescent Current
I
Programmable Current Limit
I
Operates Up to 60V Input
I
Micropower Shutdown Mode
positive “buck” configuration but several design innova-
tions allow this device to be used as a positive-to-negative
converter, a negative boost converter, and as a flyback
converter. The switch output is specified to swing 40V
below ground, allowing the LT1074 to drive a tapped-
inductor in the buck mode with output currents up to 10A.
The LT1074 uses a true analog multiplier in the feedback
loop. This makes the device respond nearly instanta-
neously to input voltage fluctuations and makes loop gain
independent of input voltage. As a result, dynamic behav-
ior of the regulator is significantly improved over previous
designs.
On-chip pulse by pulse current limiting makes the LT1074
nearly bust-proof for output overloads or shorts. The input
voltage range as a buck converter is 8V to 60V, but a self-
boot feature allows input voltages as low as 5V in the
inverting and boost configurations.
The LT1074 is available in low cost TO-220 or TO-3
packages with frequency pre-set at 100kHz and current
limit at 6.5A (LT1076 = 2.6A). A 7-pin TO-220 package is
also available which allows current limit to be adjusted
down to zero. In addition, full micropower shutdown can
be programmed. See Application Note 44 for design
details.
A fixed 5V output, 2A version is also available. See LT1076-5.
Buck Converter Efficiency
Basic Positive Buck Converter
+
+
V
SW
V
IN
V
C
GND
FB
LT1074
5V
5A
C1
500
μ
F
25V
R1
2.8k
1%
R2
2.21k
1%
MBR745*
10V TO 40V
C3
200
μ
F
R3
2.7k
C2
0.01
μ
F
L1**
50
μ
H (LT1074)
100
μ
H (LT1076)
USE MBR340 FOR LT1076
COILTRONICS #50-2-52 (LT1074)
#100-1-52 (LT1076)
PULSE ENGINEERING, INC.
#PE-92114 (LT1074)
#PE-92102 (LT1076)
HURRICANE
#HL-AK147QQ (LT1074)
#HL-AG210LL (LT1076)
RIPPLE CURRENT RATING
≥
I
OUT
/2
*
**
LT1074TA01
OUTPUT LOAD CURRENT (A)
0
E
60
70
80
90
1
2
3
4
LT1074TPC27
5
6
100
50
L = 50
μ
H TYPE 52 CORE
DIODE = MBR735
V = 5V, V = 15V
V = 12V, V = 20V
LT1074
相關PDF資料 |
PDF描述 |
|---|---|
| LT1074CK | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1074CT | Quadruple 1-of-2 Data Selectors/Multiplexers 16-PDIP 0 to 70 |
| LT1074CT7 | Quadruple 1-of-2 Data Selectors/Multiplexers 16-PDIP 0 to 70 |
| LT1074IT | Quadruple 1-of-2 Data Selectors/Multiplexers 16-SO 0 to 70 |
| LT1074MK | Quadruple 1-of-2 Data Selectors/Multiplexers 16-SO 0 to 70 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LT1074CK | 制造商:Maxim Integrated Products 功能描述:5A, STEP-DOWN, PWM, SWITCH MODE DC-DC REGULAT - Rail/Tube |
| LT1074CT | 功能描述:IC REG MULTI CONFIG ADJ TO220-5 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 |
| LT1074CT#06 | 制造商:Linear Technology 功能描述:Step-Down Switching Regulator |
| LT1074CT#06PBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 7.3V to 45V 5-Pin(5+Tab) TO-220 制造商:Linear Technology 功能描述:IC REG MULTI CONFIG ADJ TO-220-5 |
| LT1074CT#30PBF | 制造商:Linear Technology 功能描述:IC REG MULTI CONFIG ADJ TO220-5 |
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