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參數(shù)資料
| 型號： | TC1303A-AK2EMF |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
| 中文描述： | 500毫安同步降壓穩(wěn)壓器，300 mA的LDO具有電源就緒輸出 |
| 文件頁數(shù)： | 22/36頁 |
| 文件大?。?/td> | 463K |
| 代理商： | TC1303A-AK2EMF |
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TC1303A/TC1303B/TC1303C/TC1304
DS21949B-page 22
2005 Microchip Technology Inc.
4.6
TC1304 Sequencing
The TC1304 device features an integrated sequencing
option. A sequencing circuit using only the SHDN input,
(Pin1), will turn on the LDO output (V
OUT2
) and delay
the turn on of the Buck Regulator output (V
OUT1
) until
the LDO output is in regulation. During power-down,
the sequencing circuit will turn off the Buck Regulator
output prior to turning off LDO output.
FIGURE 4-2:
TC1304 Sequencing Circuit.
FIGURE 4-3:
from SHDN.
TC1304 Power-up Timing
4.7
Soft Start
Both outputs of the TC1303/TC1304 are controlled
during start-up. Less than 1% of V
OUT1
or V
OUT2
over-
shoot is observed during start-up from V
IN
rising above
the UVLO voltage or either SHDN1 or SHDN2 being
enabled.
4.8
Overtemperature Protection
The TC1303/TC1304 has an integrated overtempera-
ture protection circuit that monitors the device junction
temperature and shuts the device off if the junction tem-
perature exceeds the typical 165°C threshold. If the
overtemperature threshold is reached, the soft start is
reset so that, once the junction temperature cools to
approximately 155°C, the device will automatically
restart.
Enable
Enable
V
OUT2
V
OUT1
+
–
+
–
160 μs Delay
*
160 μs Delay
*
92% of V
OUT2
92% of V
OUT1
To PG
Delay CKT.
SHDN
* 160 μs delay on trailing edge
V
IN1
/V
IN2
V
OUT1
V
OUT2
Power Good
Power Up Timing From SHDN
300ms
t
WK
+ t
S
500 μs
TC1304
SHDN
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| TC1303A-AK2EUNTR | 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
| TC1303A-AK3EMF | 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
| TC1303A-AK3EMFTR | 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC1303A-AK2EMFTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
| TC1303A-AK2EUN | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
| TC1303A-AK2EUNTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
| TC1303A-AK3EMF | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
| TC1303A-AK3EMFTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
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