参数资料
型号: MIC3839YMM TR
厂商: Micrel Inc
文件页数: 5/11页
文件大小: 0K
描述: IC REG CTRLR ISO PWM 10-MSOP
标准包装: 2,500
PWM 型: 电流/电压模式
输出数: 1
频率 - 最大: 1MHz
占空比: 50%
电源电压: 2 V ~ 14 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
包装: 带卷 (TR)
其它名称: MIC3839YMMTR
MIC3839YMMTR-ND
MIC3838/3839
Micrel
Parameter
Condition
Min
Typ
Max
Units
Undervoltage Lockout Section
Start Threshold
Minimum Operating Voltage
After Start
Hysteresis
MIC3838, Note 11
MIC3839
MIC3838
MIC3839
MIC3838
MIC3839
11.5
4.1
7.6
3.9
3.5
0.1
12.5
4.3
8.3
4.1
4.2
0.2
13.5
4.5
9
4.3
5.1
0.3
V
V
V
V
V
V
Soft Start Section
COMP Rise Time
FB = 1.8V, Rise from 0.5V to 3V
2.5
20
ms
Overall Section
Startup Current
Operating Supply Current
V DD < Start Threshold (MIC3839)
FB = 0V, Ramp = I LIM = 0V, Notes 11, 12
130
1.5
260
2
μ A
mA
V DD Zener Shunt Voltage
I DD = 10mA, Note 13
13
14
15
V
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Maximum operating voltage is equal to the V DD (zener) shunt voltage. When operating at or near the shunt voltage, care must be taken to limit
the V DD pin current less than the 20mA V DD maximum current rating.
Specification for packaged product only.
Measured at RC.
COMP pin is internally clamped to 3.65V(typ.). COMP pin source current is measured at V COMP = 3.0V to avoid interferring with clamp.
Minimum source current is higher as V COMP approaches V CLAMP .
Note 8.
Gain is defined by A =
? V COMP
? V CS
, 0 ≤ V CS ≤ 0.4V.
Note 9.
Parameter measured at trip point of latch with FB at 0V
Note 10. The internal current sink on the Ramp and I LIM pin are designed to discharge an external filter capacitor. It is not intended to be a DC sink
path. Internal discharge FET should be able to discharge the Volt-Sec clamp and feed-forward circuits in the figure below within 50ns.
Note 11. For MIC3838, set V DD above the start threshold before setting at 10V.
Note 12. Does not include current in the external oscillator network.
Note 13. Start threshold and Zener Shunt threshold track one another.
April 2005
5
MIC3838/3839
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