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| 型号： | LTC3780MPG#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/30页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM CM 24-SSOP |
| 标准包装： | 59 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 440kHz |
| 占空比： | 99% |
| 电源电压： | 4 V ~ 36 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -55°C ~ 125°C |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
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LTC3780
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T A = 25°C. (Note 7) V IN = 15V unles s otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PGOOD Output
? V FBH
? V FBL
? V FB(HYST)
V PGL
I PGOOD
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Low Voltage
PGOOD Leakage Current
V OSENSE Rising
V OSENSE Falling
V OSENSE Returning
I PGOOD = 2mA
V PGOOD = 5V
5.5
–5.5
7.5
–7.5
2.5
0.1
10
–10
0.3
±1
%
%
%
V
μA
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: T J for the QFN package is calculated from the temperature T A and
power dissipation P D according to the following formula:
T J = T A + (P D ? 34°C/W)
Note 3: The IC is tested in a feedback loop that servos V ITH to a specified
voltage and measures the resultant V OSENSE .
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 6: The minimum on-time condition is specified for an inductor
peak-to-peak ripple current ≥ 40% of I MAX (see minimum on-time
considerations in the Applications Information section).
Note 7: The LTC3780 is tested under pulsed load conditions such that T J ≈
T A . The LTC3780E is guaranteed to meet specifications from 0°C to 85°C
junction temperature. Specifications over the –40°C to 85°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3780I is guaranteed
over the –40°C to 125°C operating junction temperature range, and
the LTC3780MP is tested and guaranteed over the full –55°C to 125°C
operating junction temperature range.
Note 8: This parameter is guaranteed by design.
Note 9: f OSC is the running frequency for the application.
3780ff
For more information www.linear.com/LTC3780
5
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