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参数资料
| 型号： | LTC4266AIUHF-4#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY MANAGEMENT CKT, PQCC38 |
| 封装： | 7 X 5 MM, LEAD FREE, PLASTIC, MO-220WHKD, QFN-38 |
| 文件页数： | 5/28页 |
| 文件大小： | 325K |
| 代理商： | LTC4266AIUHF-4#PBF |
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LTC4266A/LTC4266C
13
4266acf
pin Functions
RESET: Chip Reset, Active Low. When the RESET pin is
low, the LTC4266A/LTC4266C is held inactive with all ports
off and all internal registers reset to their power-up states.
When RESET is pulled high, the LTC4266A/LTC4266C
begins normal operation. RESET can be connected to
an external capacitor or RC network to provide a power
turn-on delay. Internal filtering of the RESET pin prevents
glitches less than 1s wide from resetting the LTC4266A/
LTC4266C. Internally pulled up to VDD.
MID: Midspan Mode Input. When high, the LTC4266A/
LTC4266C acts as a midspan device. Internally pulled
down to DGND.
INT: Interrupt Output, Open Drain. INT will pull low when
anyoneofseveraleventsoccurintheLTC4266A/LTC4266C.
It will return to a high impedance state when bits 6 or 7
are set in the Reset PB register (1Ah). The INT signal can
be used to generate an interrupt to the host processor,
eliminating the need for continuous software polling.
Individual INT events can be disabled using the Int Mask
register (01h). See the LTC4266A/LTC4266C Software
Programming documentation for more information. The
INT pin is only updated between I2C transactions.
SCL:SerialClockInput.Highimpedanceclockinputforthe
I2C serial interface bus. SCL must be tied high if not used.
SDAOUT: Serial Data Output, Open Drain Data Output for
the I2C Serial Interface Bus. The LTC4266A/LTC4266C
uses two pins to implement the bidirectional SDA function
to simplify optoisolation of the I2C bus. To implement a
standard bidirectional SDA pin, tie SDAOUT and SDAIN
together. SDAOUT should be grounded or left floating if
not used. See the Applications Information section for
more information.
SDAIN: Serial Data Input. High impedance data input for
the I2C serial interface bus. The LTC4266A/LTC4266C
uses two pins to implement the bidirectional SDA function
to simplify optoisolation of the I2C bus. To implement a
standard bidirectional SDA pin, tie SDAOUT and SDAIN
together. SDAIN must be tied high if not used. See the
Applications Information section for more information.
AD3: Address Bit 3. Tie the address pins high or low to set
the I2C serial address to which the LTC4266A/LTC4266C
responds. This address will be 010A3A2A1A0b. Internally
pulled up to VDD.
AD2: Address Bit 2. See AD3.
AD1: Address Bit 1. See AD3.
AD0: Address Bit 0. See AD3.
NC, DNC: All pins identified with “NC” or “DNC” must be
left unconnected.
DGND: Digital Ground. DGND is the return for the VDD
supply.
VDD: Logic Power Supply. Connect to a 3.3V power supply
relative to DGND. VDD must be bypassed to DGND near
the LTC4266A/LTC4266C with at least a 0.1F capacitor.
SHDN1: Shutdown Port 1, Active Low. When pulled low,
SHDN1 shuts down port 1, regardless of the state of the
internal registers. Pulling SHDN1 low is equivalent to set-
ting the Reset Port 1 bit in the Reset Pushbutton register
(1Ah). Internal filtering of the SHDN1 pin prevents glitches
less than 1s wide from reseting the port. Internally pulled
up to VDD.
SHDN2: Shutdown Port 2, Active Low. See SHDN1.
SHDN3: Shutdown Port 3, Active Low. See SHDN1.
SHDN4: Shutdown Port 4, Active Low. See SHDN1.
AGND: Analog Ground. AGND is the return for the VEE
supply.
SENSE4: Port 4 Current Sense Input. SENSE4 monitors
the external MOSFET current via a 0.5 or 0.25Ω sense
resistor between SENSE4 and VEE. Whenever the voltage
acrossthesenseresistorexceedstheovercurrentdetection
threshold VCUT, the current limit fault timer counts up. If
the voltage across the sense resistor reaches the current
limit threshold VLIM, the GATE4 pin voltage is lowered to
maintain constant current in the external MOSFET. See
the Applications Information section for further details.
If the port is unused, the SENSE4 pin must be tied to VEE.
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相关代理商/技术参数 |
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|---|---|
| LTC4266C | 制造商:LINER 制造商全称:Linear Technology 功能描述:12-Port PoE/PoE+/LTPoE++ PSE Controller |
| LTC4266CGW#PBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 36-Pin SSOP 制造商:Linear Technology 功能描述:IC POE CONTROLLER 3.3V SSOP-36 制造商:Linear Technology 功能描述:IC QUAD POE CONTROLLER 3.3V 制造商:Linear Technology 功能描述:IC, POE CONTROLLER, 3.3V, SSOP-36; Input Voltage:3.3V; Supply Current:-2.4mA; UVLO:25V; Digital IC Case Style:SSOP; No. of Pins:36; Duty Cycle (%):60%; Frequency:1MHz; Operating Temperature Min:0C; Operating Temperature Max:70C ;RoHS Compliant: Yes |
| LTC4266CGW#TRPBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 36-Pin SSOP W |
| LTC4266CIUHF#PBF | 功能描述:IC CONTROLLER PSE QUAD 38-QFN RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:2,450 系列:- 控制器类型:SPI 总线至 I²C 总线桥接 接口:I²C，串行，SPI 电源电压:2.4 V ~ 3.6 V 电流 - 电源:11mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-HVQFN（4x4） 包装:托盘 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名称:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC4266CIUHF#TRPBF | 功能描述:IC CONTROLLER PSE QUAD 38-QFN RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:2,450 系列:- 控制器类型:SPI 总线至 I²C 总线桥接 接口:I²C，串行，SPI 电源电压:2.4 V ~ 3.6 V 电流 - 电源:11mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-HVQFN（4x4） 包装:托盘 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名称:935286452157SC18IS600IBSSC18IS600IBS-ND |
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