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| 型号： | LT1270ACT#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/4页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG 10A TO220-5 |
| 标准包装： | 50 |
| 类型： | 降压（降压），升压（升压），反相，回扫 |
| 输出数： | 1 |
| 输入电压： | 3.5 V ~ 30 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 60kHz |
| 电流 - 输出： | 10A |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-5 成形引线 |
| 包装： | 管件 |
| 供应商设备封装： | TO-220-5 |
| 产品目录页面： | 1326 (CN2011-ZH PDF) |
LT1270A/LT1270
ELECTRICAL C HARA C TERISTICS The q denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T A = 25 ° C. V IN = 15V, V C = 0.5V, V FB = V REF , switch pin open, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I LIM
? I IN
? I SW
f
Switch Current Limit (LT1270A)
(Note 4)
Supply Current Increase
During Switch-ON Time
Switching Frequency
Duty Cycle = 50%, T J ≤ 100 ° C
Duty Cycle = 80%, T J ≤ 100 ° C
q
q
10.0
7.5
50
25
60
16.0
14.0
40
70
A
A
mA/A
kHz
q
50
70
kHz
DC MAX
Maximum Switch Duty Cycle
80
92
95
%
Flyback Sense Delay Time
1.5
μ s
Shutdown Mode Supply Current
3V ≤ V IN ≤ V MAX , V C = 0.05V
100
400
μ A
Shutdown Mode Threshold Voltage
3V ≤ V IN ≤ V MAX
q
100
50
150
250
300
mV
mV
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Measured with V C in Hi Clamp, V FB = 0.8V.
Note 3: For duty cycles (DC) between 50% and 80%, minimum guaranteed
switch current is given by I LIM = 6.67 (1.7 – DC) for the LT1270 and I LIM =
8.33 (1.7 – DC) for the LT1270A.
Note 4: Minimum current limit is reduced by 0.5A at 125 ° C. 100 ° C test
limits are guaranteed by correlation to 125 ° C tests.
TYPICAL PERFOR A CE CHARACTERISTICS
24
18
Switch Current Limit vs Duty Cycle
1.6
1.2
Switch Saturation Voltage
T J = 25° C
12
–55 ° C
25 ° C
0.8
125 ° C
6
0.4
0
0
20
40
60
80
100
0
0
2
4
6
8
10
DUTY CYCLE (%)
LT1270 ? TA03
TYPICAL APPLICATIO S
Boost Converter (5V to 12V)
SWITCH CURRENT (A)
LT1270 ? TA04
5V
V IN
55 μ H*
V SW
MBR1020
LT1270
10.7k
12V, 2A
GND
V C
FB
+ 1000 μ F
25V
1k
1.24k
+
1 μ F
PULSE ENGINEERING #PE-92116
LT1270 ? TA05
1270afc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However,
no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the
interconnection of circuits as described herein will not infringe on existing patent rights.
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1270C | 制造商:LINER 制造商全称:Linear Technology 功能描述:8A and 10A High Efficiency Switching Regulators |
| LT1270CT | 功能描述:IC REG MULTI CONFIG 8A 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 |
| LT1270CT#33 | 制造商:Linear Technology 功能描述:Q# 39696 |
| LT1270CT#PBF | 功能描述:IC REG MULTI CONFIG 8A 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 |
| LT1270CT06 | 制造商:LT 功能描述:* |
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