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参数资料
| 型号： | LTC1911EMS8-1.5#TR |
| 厂商： | Linear Technology |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 1.5V 0.25A 8MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.5V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 250mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-MSOP |
| 其它名称： | LTC1911EMS8-1.5TR LTC1911EMS81.5TR |
LTC1911-1.5/LTC1911-1.8
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
V IN to GND ................................................... – 0.3V to 6V
SS/SHDN to GND ........................ – 0.3V to (V IN + 0.3V)
TOP VIEW
ORDER PART
NUMBER
V OUT Short-Circuit Duration ............................ Indefinite
Operating Temperature Range (Note 2) .. – 40 ° C to 85 ° C
Storage Temperature Range ................. – 40 ° C to 150 ° C
Lead Temperature (Soldering, 10 sec).................. 300 ° C
V IN
C2 +
C2 –
GND
1 8 SS/SHDN
2 7 C1 +
3 6 V OUT
4 5 C1 –
MS8 PACKAGE
8-LEAD PLASTIC MSOP
LTC1911EMS8-1.5
LTC1911EMS8-1.8
MS8 PART MARKING
T JMAX = 125 ° C, θ JA = 160 ° C/ W
LTMY
LTNU
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are T A = 25 ° C. V IN = 3.6V, C1 = 1 μ F, C2 = 1 μ F, C IN = 10 μ F, C OUT = 10 μ F unless
otherwise noted.
PARAMETER
V IN Operating Voltage
CONDITIONS
q
MIN
2.7
TYP
MAX
5.5
UNITS
V
V OUT
V IN Operating Current
V IN Shutdown Current
LTC1911-1.5, 0mA ≤ I OUT ≤ 250mA, V IN = 2.7V to 5.5V
LTC1911-1.8, 0mA ≤ I OUT ≤ 250mA, V IN = 2.7V to 5.5V
I OUT = 0mA, V IN = 2.7V to 5.5V
SS/SHDN = 0V, V IN = 2.7V to 5.5V
q
q
q
q
1.44
1.73
1.5
1.8
180
10
1.56
1.87
350
20
V
V
μ A
μ A
Output Ripple
V OUT Short-Circuit Current
I OUT = 10mA
I OUT = 250mA
V OUT = 0V
5
12
600
mV P-P
mV P-P
mA
Switching Frequency
SS/SHDN Input Threshold
Oscillator Free Running
q
1.2
0.3
1.5
0.6
1.8
1
MHz
V
SS/SHDN Soft-Start Current
V SS/SHDN = 0V (Note 3)
V SS/SHDN = V IN
q
–5
–2
0.01
–1
μ A
μ A
Turn-On Time
Load Regulation
Line Regulation
C SS = 0pF, V IN = 3.3V
C SS = 10nF, V IN = 3.3V
0V ≤ I OUT ≤ 250mA
0V ≤ I OUT ≤ 250mA
0.03
10
0.13
0.3
ms
ms
mV/mA
%/V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 3: Currents flowing into the device are positive polarity. Currents
flowing out of the device are negative polarity.
Note 2: The LTC1911E is guaranteed to meet specified performance from
0 ° C to 70 ° C. Specifications over the – 40 ° C to 85 ° C operating temperature
range are assured by design, characterization and correlation with
statistical process controls.
1911f
2
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