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参数资料
| 型号： | LTC4267CGN-1#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator; Package: SSOP; No of Pins: 16; Temperature Range: 0°C to +70°C |
| 中文描述： | 1 A SWITCHING CONTROLLER, 240 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-16 |
| 文件页数： | 31/32页 |
| 文件大小： | 925K |
| 代理商： | LTC4267CGN-1#PBF |
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LTC4267-1
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PGND (Pin 1, 8, 9, 16): Switching Regulator Negative
Supply. This pin is the negative supply rail for the switching
regulator controller and must be tied to POUT.
ITH/RUN (Pin 2): Current Threshold/Run Input. This
pin performs two functions. It serves as the switching
regulator error amplier compensation point as well as
the run/shutdown control input. Nominal voltage range is
0.7V to 1.9V. Forcing the pin below 0.28V with respect to
PGND causes the controller to shut down.
NGATE (Pin 3): Gate Driver Output. This pin drives the
regulator’s external N-Channel MOSFET and swings from
PGND to PVCC.
PVCC (Pin 4): Switching Regulator Positive Supply. This
pin is the positive supply rail for the switching regulator
and must be closely decoupled to PGND.
RCLASS (Pin 5): Class Select Input. Used to set the current
value the PD maintains during classication. Connect a
resistor between RCLASS and VPORTN (see Table 2).
NC (Pin 6): No Internal Connection.
VPORTN (Pin 7): Negative Power Input. Tie to the –48V
input port through the input diodes.
POUT (Pin 10):Power Output. Supplies –48V to the switch-
ing regulator PGND pin and any additional PD loads through
an internal power MOSFET that limits input current. POUT
is high impedance until the voltage reaches the turn-on
UVLO threshold. The output is then current limited. See
the Application Information section.
PWRGD (Pin 11): Power Good Output, Open-Drain.
Indicates that the PD MOSFET is on and the switching
regulator can start operation. Low impedance indicates
power is good.
PWRGD is high impedance during detec-
tion, classication and in the event of a thermal overload.
PWRGD is referenced to V
PORTN.
SIGDISA (Pin 12): Signature Disable Input. SIGDISA al-
lows the PD to present an invalid signature resistance and
remain inactive. Connecting SIGDISA to VPORTP lowers
the signature resistance to an invalid value and disables
all functions of the LTC4267-1. If unused, tie SIGDISA to
VPORTN.
VPORTP (Pin 13): Positive Power Input. Tie to the input
port power return through the input diodes.
SENSE (Pin 14): Current Sense. This pin performs two
functions. It monitors the regulator switch current by read-
ing the voltage across an external sense resistor. It also
injects a current ramp that develops a slope compensation
voltage across an optional external programming resistor.
See the Applications Information section.
VFB(Pin15):FeedbackInput.Receivesthefeedbackvoltage
from the external resistor divider across the output.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4267CGN-1-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator |
| LTC4267CGN-1-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator |
| LTC4267CGN-3#PBF | 功能描述:IC POE 802.3AF W/REG 16-SSOP 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 |
| LTC4267CGN-3#TRPBF | 功能描述:IC POE 802.3AF INTERFACE 16SSOP 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 |
| LTC4267CGNPBF | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-Ch -57V SSOP16 |
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