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| 型号： | LTC3251EMSE-1.5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SWITCHED CAP 10MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），切换电容（充电泵） |
| 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： | 多重 |
| 频率 - 开关： | 1MHz ~ 1.6MHz |
| 电流 - 输出： | 500mA |
| 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： | 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 |
LTC3251/
LTC3251-1.2/LTC3251-1.5
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 3.6V, C1 = C2 = 1 μ F, C IN = 1 μ F, C OUT = 10 μ F,
V MODE = 0V for LTC3251-1.2V or LTC3251-1.5, V OUT = 1.5V for LTC3251, all capacitors ceramic, unless otherwise noted.
PARAMETER
Line Regulation (LTC3251)
CONDITIONS
I OUT = 500mA, 2.7V ≤ V IN ≤ 5.5V
MIN
TYP
0.2
MAX
UNITS
%/V
Spread Spectrum Frequency Range
f MIN Switching Frequency
f MAX Switching Frequency
●
●
0.7
1.0
1.6
2
MHz
MHZ
Spread Spectrum Disabled Frequency
MD0, MD1 Input High Voltage
MODE = V IN
2.7V ≤ V IN ≤ 5.5V
●
●
1.3
1.6
0.8
2
1.2
MHz
V
MD0, MD1 Input Low Voltage
MD0, MD1 Input High Current
MD0, MD1 Input Low Current
FB Input Current (LTC3251)
2.7V ≤ V IN ≤ 5.5V
MD0 = V IN , MD1 = V IN
MD0 = 0V, MD1 = 0V
V FB = 0.85V
●
●
●
●
0.4
–1
–1
–50
0.8
1
1
50
V
μ A
μ A
nA
MODE Input High Voltage (LTC3251-1.2/LTC3251-1.5)
2.7V ≤ V IN ≤ 5.5V
●
50
70
%/V IN
MODE Input Low Voltage (LTC3251-1.2/LTC3251-1.5)
MODE Input High Current (LTC3251-1.2/LTC3251-1.5)
MODE Input Low Current (LTC3251-1.2/LTC3251-1.5)
Turn-On Time (Burst or Continuous Mode Operation)
2.7V ≤ V IN ≤ 5.5V
MODE = V IN
MODE = 0V
R OL = 3 ? , (Note 5)
●
●
●
30
–1
–1
50
1
1
1
%/V IN
μ A
μ A
ms
Open-Loop Output Impedance (LTC3251)
V IN = 3V, I OUT = 200mA (Note 6)
●
0.45
0.7
?
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Based on long term current density limitations.
Note 3: The LTC3251E 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.
Note 4: Minimum operating voltage required for regulation is:
V IN ≥ 2 ? (V OUT + R OL ? I OUT )
Note 5: V MODE = 0V or V MODE = V IN for LTC3251-1.2/LTC3251-1.5.
Note 6: Output not in regulation; R OL = (V IN /2 – V OUT )/I OUT .
(V FB = 0.76V). Burst or continuous mode operation.
Note 7: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125 ° C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
TYPICAL PERFOR A CE CHARACTERISTICS
No Load Supply Current vs Supply
No Load Supply Current vs Supply
Voltage (Continuous Mode Spread
Spectrum Enabled)
Voltage (Continuous Mode,
Spread Spectrum Disabled)
No Load Supply Current vs Supply
Voltage (Burst Mode Operation)
7
6
5
4
–40 ° C
25 ° C
85 ° C
10
9
8
7
6
–40 ° C
25 ° C
85 ° C
50
45
40
85 ° C
25 ° C
5
35
3
2
1
4
3
2
1
30
25
–40 ° C
0
2.7
3.2
3.7
4.2
4.7
5.2
0
2.7
3.2
3.7
4.2
4.7
5.2
20
2.7
3.2
3.7
4.2
4.7
5.2
V IN (V)
3251 G01
V IN (V)
3251 G17
V IN (V)
3251 G02
32511215fb
3
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| LTC3252EDE | 功能描述:IC REG BUCK SWITCHED CAP 12DFN 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 |
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