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參數(shù)資料
| 型號： | PM6685TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32 |
| 封裝： | 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, VFQFPN-32 |
| 文件頁數(shù)： | 24/52頁 |
| 文件大?。?/td> | 2536K |
| 代理商： | PM6685TR |
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Device description
PM6685
30/52
V5SW pin allows to keep the 5V linear regulator always active or to enable the internal
bootstrap-switch over function: if the 5V switching output is connected to V5SW, when the
voltage on V5SW pin is above 4.8V, an internal 3.0
max p-channel MOSFET switch
connects V5SW pin to LDO5 pin and simultaneously LDO5 shuts down. This configuration
allows to achieve higher efficiency. V5SW can be connected also to an external 5V supply.
LDO5 regulator turns off and LDO5 is supplied externally. If V5SW is connected to ground,
the internal 5V regulator is always on and supplies LDO5 output.
The 3.3V linear regulator is supplied by LDO5 output.
LDO3_SEL pin allows to keep 3.3V linear regulator always enabled, always disabled or to
enable the internal bootstrap-switch over function. According to Table 7:
●
If LDO3_SEL is connected to VREF pin, when the power good signal of the 3.3V
switching output voltage PGOOD3(see related sections) is high, the internal linear
regulator is turned off and LDO3 output is connected directly to OUT3 pin through an
internal 3
max p-channel MOSFET switch.
●
If LDO3_SEL is connected to 5V, the internal 3.3V regulator is always on and supplies
LDO3 output.
●
If LDO3_SEL is connected to ground, the internal 3.3V regulator is always off and
LDO3 output is clamped to ground.
7.11
Power up sequencing and operative modes
Let’s consider SHDN, EN5 and EN3 low at the beginning. The battery voltage is applied as
input voltage. The device is in shutdown mode.
When the SHDN pin voltage is above the shutdown device on threshold(1.5V typ.), the
controller begins the power-up sequence. All the latched faults are cleared. LDO5
undervoltage control is blanked for 4 ms and the internal regulator LDO5 turns on. If the
LDO5 output is above the UVLO threshold after this time, the device enters in standby
mode. The switching outputs are kept to ground by turning on the low side MOSFETs.
Table 7.
V5SW multifunction pin
V5SW
Description
GND
The 5V linear regulator is always turned on and supplies LDO5 output.
Switching 5V
output
The 5V linear regulator is turned off when the voltage on V5SW is above 4.8V
and LDO5 output is supplied by the switching 5V output.
External 5V
supply
The 5V linear regulator is turned off when the voltage on V5SW is above 4.8V
and LDO5 output is supplied by the external 5V.
Table 8.
LDO3_SEL multifunction pin
LDO3_SEL
Description
GND
The 3.3V linear regulator is always turned off.
VREF
The 3.3V linear regulator is turned off when PGOOD3 is high. LDO3 output is
supplied by the switching 3.3V output.
LDO5
The 3.3V linear regulator is always turned on and supplies LDO3 output.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PM6686 | 制造商:STMicroelectronics 功能描述: |
| PM6686TR | 功能描述:DC/DC 開關(guān)控制器 Step-down Controller w/adj. voltages-dual RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| PM6-6F-L | 功能描述:端子 Metric Fork Terminal non-insulated, 4.0 RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點電鍍:Tin over Nickel 觸點材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp |
| PM6-6R-D | 制造商:Panduit Corp 功能描述: |
| PM6-6R-L | 功能描述:端子 Metric Ring Terminal non-insulated, 2.5 RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點電鍍:Tin over Nickel 觸點材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp |
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