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参数资料
| 型号： | LT1074HVIT7#35 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 8.5 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, PZFM7 |
| 封装： | PLASTIC, TO-220, 7 PIN |
| 文件页数： | 1/17页 |
| 文件大小： | 201K |
| 代理商： | LT1074HVIT7#35 |
LT1074/LT1076
1
sn1074 1074fds
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
U
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-
■ Buck Converter with Output Voltage Range of 2.5V
to 50V
■ Tapped-Inductor Buck Converter with 10A Output
at 5V
■ Positive-to-Negative Converter
■ Negative Boost Converter
■
Multiple Output Buck Converter
■ 5A Onboard Switch (LT1074)
■
Operates Up to 60V Input
■ 100kHz Switching Frequency
■ Greatly Improved Dynamic Behavior
■
Available in Low Cost 5 and 7-Lead Packages
■ Only 8.5mA Quiescent Current
■ Programmable Current Limit
■
Micropower Shutdown Mode
ponents, are included on the chip. The topology is a classic
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 DD 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
+
VSW
VIN
VC
GND
FB
LT1074
5V
5A
C1
500
F
R1
2.8k
1%
R2
2.21k
1%
MBR745*
10V TO 40V
C3
200
F
R3
2.7k
C2
0.01
F
L1**
50
H (LT1074)
100
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
≥ IOUT/2
*
**
LT1074TA01
25V
OUTPUT LOAD CURRENT (A)
0
EFFICIENCY
(%)
60
70
80
90
12
3
4
LT1074TPC27
5
6
100
50
L = 50
H TYPE 52 CORE
DIODE = MBR735
V
= 5V, V
= 15V
OUT
IN
V
= 12V, V
= 20V
OUT
IN
LT1074
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1074HVIT7PBF | 制造商:Linear Technology 功能描述:Switching Regulator Step-Down 5A TO220-7 |
| LT1074HVITPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 8-60V TO220-5 |
| LT1074IT | 功能描述:IC REG MULTI CONFIG ADJ TO220-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT1074IT#06 | 制造商:Linear Technology 功能描述:Step-Down Switching Regulator |
| LT1074IT#06PBF | 功能描述:IC REG MULTI CONFIG ADJ TO220-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
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