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参数资料
| 型号： | LT1074IT7 |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ TO220-7 |
| 标准包装： | 50 |
| 类型： | 降压（降压），升压（升压），反相，回扫 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.5 V ~ 50 V |
| 输入电压： | 8 V ~ 45 V |
| 频率 - 开关： | 100kHz |
| 电流 - 输出： | 5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-7 成形引线 |
| 包装： | 管件 |
| 供应商设备封装： | TO-220-7 |
LT1074/LT1076
Step-Down Switching
Regulator
FEATURES
ponents, are included on the chip. The topology is a classic
positive “buck” configuration but several design innova-
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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
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
APPLICATIO S
independent of input voltage. As a result, dynamic behav-
ior of the regulator is significantly improved over previous
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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
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
DESCRIPTIO
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-
TYPICAL APPLICATIO
Basic Positive Buck Converter
L1**
(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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Buck Converter Efficiency
LT1074
100
V OUT IN = 20V
10V TO 40V
V IN
LT1074
V SW
50 μ H (LT1074)
100 μ H (LT1076)
MBR745*
R1
2.8k
5V
5A
* USE MBR340 FOR LT1076
** COILTRONICS #50-2-52 (LT1074)
#100-1-52 (LT1076)
90
80
= 12V, V
V OUT = 5V, V IN = 15V
+
C3 ?
200 μ F
GND
V C
FB
R3
2.7k
C2
0.01 μ F
1%
R2
2.21k
1% +
C1
500 μ F
25V
?
PULSE ENGINEERING, INC.
#PE-92114 (LT1074)
#PE-92102 (LT1076)
HURRICANE #HL-AK147QQ (LT1074)
#HL-AG210LL (LT1076)
RIPPLE CURRENT RATING ≥ I OUT /2
70
60
50
0
1
L = 50 μ H TYPE 52 CORE
DIODE = MBR735
2 3 4
5
6
OUTPUT LOAD CURRENT (A)
LT1074?TA01
LT1074?TPC27
sn1074 1074fds
1
相关PDF资料 |
PDF描述 |
|---|---|
| SC104-331 | INDUCTOR SMD 330UH 0.42A 1KHZ |
| LT1076HVCR | IC REG MULTI CONFIG ADJ 2A D2PAK |
| SC104-330 | INDUCTOR SMD 33UH 1.26A 2.52MHZ |
| SC104-271 | INDUCTOR SMD 270UH 0.45A 1KHZ |
| SC104-270 | INDUCTOR SMD 27UH 1.44A 2.52MHZ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1074IT7#06PBF | 制造商:Linear Technology 功能描述:LEAD FREE 5A STEP DOWN SWITCHING REG |
| LT1074IT7#PBF | 功能描述:IC REG MULTI CONFIG ADJ TO220-7 RoHS:否 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 |
| LT1074ITPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 8-60V TO220-5 |
| LT1076CQ | 功能描述:IC REG MULTI CONFIG ADJ 2A D2PAK RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1076CQ#PBF | 功能描述:IC REG MULTI CONFIG ADJ 2A D2PAK 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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