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参数资料
| 型号： | FAN5361UMP123X |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.25 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 2 X 2 MM, MO-229VCCC, UMLP-6 |
| 文件页数： | 5/18页 |
| 文件大小： | 1326K |
| 代理商： | FAN5361UMP123X |
2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5361 Rev. 1.1.1
13
FAN5361
—
6MHz,
6
00mA
/750mA
Synchronous
Buck
Regul
ator
Under-Voltage Lockout (UVLO)
When EN is HIGH, the under-voltage lockout keeps the part
from operating until the input supply voltage rises high
enough to properly operate. This ensures no misbehavior of
the regulator during startup or shutdown.
Thermal Shutdown (TSD)
When the die temperature increases, due to a high load
condition and/or a high ambient temperature, the output
switching is disabled until the temperature on the die has
fallen sufficiently. The junction temperature at which the
thermal shutdown activates is nominally 150°C with a 15°C
hysteresis.
Minimum Off-Time Effect on Switching
Frequency
tOFF(MIN) is 50ns. This imposes constraints on the maximum
IN
OUT
V
that the FAN5361 can provide, or the maximum
output voltage it can provide at low VIN while maintaining a
fixed switching frequency in PWM mode.
When VIN is LOW, fixed switching is maintained as long as
7
.
0
1
)
(
SW
MIN
OFF
IN
OUT
f
t
V
.
The switching frequency drops when the regulator cannot
provide sufficient duty cycle at 6MHz to maintain regulation.
This occurs when VOUT is greater than or equal to 1.82V and
VIN is below 2.9V at high load currents (see Figure 15).
The calculation for switching frequency is given by:
MHz
t
f
MAX
SW
6
,
1
min
)
(
(3)
where:
OUT
ON
OUT
IN
OFF
OUT
MAX
SW
V
R
I
V
R
I
V
ns
t
1
50
)
(
(4)
where:
OFF
R
=
L
N
DSON
DCR
R
_
ON
R
=
L
P
DSON
DCR
R
_
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN5361UMP12X | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:6MHz, 600mA TinyBuck⑩ Synchronous Buck Regulator |
| FAN5361UMP13X | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:6MHz, 600mA TinyBuck⑩ Synchronous Buck Regulator |
| FAN5361UMP15X | 功能描述:直流/直流开关调节器 6MHz;600mA;TinyBuck Syncronous Buck Reg. RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| FAN5361UMP182X | 功能描述:直流/直流开关调节器 6MHz, 600mA/750mA Sync Buck Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| FAN5361UMP18X | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:6MHz, 600mA TinyBuck⑩ Synchronous Buck Regulator |
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