- 您现在的位置：买卖IC网 > PDF目录80080 > LT3500IMSE#PBF (LINEAR TECHNOLOGY CORP) 3.5 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO16 PDF资料下载
参数资料
| 型号： | LT3500IMSE#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件页数： | 27/28页 |
| 文件大小： | 318K |
| 代理商： | LT3500IMSE#PBF |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页当前第27页第28页
LT3500
8
3500fc
PIN FUNCTIONS
Driving the RT/SYNC pin with an external clock signal
will synchronize the switch to the applied frequency.
Synchronization occurs on the rising edge of the clock
signal after the clock signal is detected. Each rising clock
edge initiates an oscillator ramp reset. A gain control loop
servos the oscillator charging current to maintain a con-
stant oscillator amplitude. Hence, the slope compensation
remains unchanged. If the clock signal is removed, the
oscillator reverts to resistor mode and reapplies the 1V
bias to the RT/SYNC pin after the synchronization detection
circuitry times out. The clock source impedance should
be set such that the current out of the RT/SYNC pin in
resistor mode generates a frequency roughly equivalent
to the synchronization frequency. Floating or holding the
RT/SYNC pin above 1.1V will not damage the device, but
will halt oscillation.
PG: The power good bar pin is an open-collector output
that sinks current when the FB or LFB rises above 90%
of its nominal regulating voltage.
FB: The FB pin is the negative input to the switcher error
amplier. The output switches to regulate this pin to 0.8V
with respect to the exposed ground pad. Bias current
ows out of the FB pin.
LFB: The LFB pin is the negative input to the linear error
amplier. The LDRV pin servo’s to regulate this pin to 0.8V
with respect to the exposed ground pad. Bias current ows
out of the LFB pin.
LDRV: The LDRV pin is the emitter of an internal NPN that
can be congured as an output of a linear regulator or as
the drive for an external NPN high current regulator. Cur-
rent ows out of the LDRV pin when the LFB pin voltage is
below 0.8V. The LDRV pin has a typical maximum current
capability of 13mA.
BST: The BST pin provides a higher than VIN base drive to
the power NPN to ensure a low switch drop. A compara-
tor to VIN imposes a minimum off time on the SW pin if
the BST pin voltage drops too low. Forcing a SW off time
allows the boost capacitor to recharge.
SW: The SW pin is the emitter of the on-chip power NPN.
At switch off, the inductor will drive this pin below ground
with a high dV/dt. An external catch diode to ground, close
to the SW pin and respective VIN decoupling capacitor’s
ground, must be used to prevent this pin from excessive
negative voltages.
Exposed Pad: GND. The exposed pad is the only ground
connection for the device. The exposed pad should be
soldered to a large copper area to reduce thermal resis-
tance. The GND pin also serves as small-signal ground.
For ideal operation all small-signal ground paths should
connect to the GND pin at a single point, avoiding any
high current ground returns.
NC Pins (MSE Package Only): No Connection. The NC pins
are electrically isolated from the LT3500. The NC pins may
be connected to PCB traces to aid PCB layout.
相关PDF资料 |
PDF描述 |
|---|---|
| LWN1801-6EM1FK2G | DC-DC REG PWR SUPPLY MODULE |
| LWN1801-6EM2FK2G | DC-DC REG PWR SUPPLY MODULE |
| LT1304CS8-5#PBF | 1.2 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO8 |
| LX1004CDM-2.5-TR | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
| LT3574EMS#TRPBF | 1.1 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3500IMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller |
| LT3500T | 制造商:Eaton Corporation 功能描述:TYPE LT TRIP UNIT ONLY 3P 500A 600VAC MAX |
| LT3501 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Dual Tracking 3A Step-Down Switching Regulator |
| LT3501_12 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic Dual Tracking 3A Step-Down Switching |
| LT3501EFE | 制造商:Linear Technology 功能描述:Conv DC-DC Dual Step Down 3.1V to 25V 20-Pin TSSOP EP |
发布紧急采购，3分钟左右您将得到回复。