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参数资料
| 型号： | LT1271CT#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/8页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK INV FLYBK 4A TO220-5 |
| 标准包装： | 50 |
| 类型： | 降压（降压），反相，回扫 |
| 输出数： | 1 |
| 输入电压： | 3.5 V ~ 30 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 60kHz |
| 电流 - 输出： | 4A |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 100°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) |
LT1271/LT1269
A BSOLUTE
A XI U
R A TI G S
Supply Voltage ....................................................... 30V
Switch Output Voltage ............................................ 60V
Feedback Pin Voltage (Transient, 1ms) ................ ± 15V
Storage Temperature Range ................ – 65 ° C to 150 ° C
PACKAGE/ORDER I FOR ATIO
Operating Junction Temperature Range
Operating .............................................. 0 ° C to 100 ° C
Short Circuit ......................................... 0 ° C to 125 ° C
Lead Temperature (Soldering, 10 sec.)................ 300 ° C
FRONT VIEW
ORDER PART
ORDER PART
5
V IN
NUMBER
TOP VIEW
NUMBER
4
3
2
1
V SW
GND
FB
V C
LT1271CQ
LT1269CQ
V SW 1
V SW 2
NC 3
GND 4
20 V SW
19 V SW
18 NC
17 GND
LT1269CS
Q PACKAGE
5-LEAD PLASTIC DD
T J MAX = 100 ° C, θ JC = 4 ° C/W, θ JA = 30 ° C/W*
POWER
SWITCH
GND 5
GND 6
16 GND
15 GND
POWER
SWITCH
GND 7
14 GND
FRONT VIEW
ORDER PART
AGND 8
13 V IN
5
4
V IN
V SW
NUMBER
V C 9
FB 10
12 NC
11 NC
3
2
1
T PACKAGE
5-LEAD PLASTIC TO-220
GND
FB
V C
LT1271CT
LT1269CT
SW PACKAGE
20-LEAD PLASTIC WIDE SO
θ WILL VARY FROM APPROXIMATELY 40 ° C/W
WITH 0.75 SQ. IN. OF 1 OZ. COPPER TO 46 ° C/W
WITH 0.33 SQ. IN. OF 1 OZ. COPPER
T J MAX = 100 ° C, θ JC = 4 ° C/W, θ JA = 50 ° C/W
*With device soldered to 1/2 square inch of 1oz copper over backside or internal layer
ground plane. Consult factory for Industrial and Military grade parts.
ELECTRICAL C HARA C TERISTICS
V IN = 15V, V C = 0.5V, V FB = V REF, switch pin open, unless otherwise noted.
SYMBOL
V REF
I B
PARAMETER
Reference Voltage
Feedback Input Current
CONDITIONS
Measured at Feedback Pin
V C = 0.8V
V FB = V REF
q
MIN
1.224
1.214
TYP
1.244
1.244
350
MAX
1.264
1.274
750
UNITS
V
V
nA
q
1100
nA
gm
Error Amplifier
Transconductance
Error Amplifier Source or
Sink Current
? I C = ± 25 μ A
V C = 1.5V
q
q
3000
2400
150
120
4400
200
6000
7000
350
400
μ mho
μ mho
μ A
μ A
Error Amplifier Clamp
Hi Clamp, V FB = 1V
1.8
2.3
V
Voltage
Reference Voltage Line
Lo Clamp, V FB = 1.5V
3V ≤ V IN ≤ V MAX, V C = 0.8V
q
0.25
0.38
0.52
0.03
V
%/V
Regulation
A V
Error Amplifier Voltage Gain
Minimum Input Voltage (Note 3)
0.9V ≤ V C ≤ 1.4V
q
500
800
2.8
3.0
V/V
V
I Q
Supply Current
3V ≤ V IN ≤ V MAX , V C = 0.6V
7
10
mA
2
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相关代理商/技术参数 |
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|---|---|
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