参数资料
型号: LTC3805IMSE-5#TRMPBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10
封装: LEAD FREE, PLASTIC, MSOP-10
文件页数: 17/20页
文件大小: 203K
代理商: LTC3805IMSE-5#TRMPBF
LTC3805-5
6
38055fb
PIN FUNCTIONS
SSFLT (Pin 1): Soft-Start Pin. A capacitor placed from
this pin to GND (Exposed Pad) controls the rate of rise of
converter output voltage during start-up. This capacitor is
also used for time out after a fault prior to restart.
ITH (Pin 2): Error Amplier Compensation Point. Normal
operating voltage range is clamped between 0.7V and
1.9V.
FB (Pin 3): Receives the feedback voltage from an external
resistor divider across the output.
RUN (Pin 4): An external resistor divider connects this pin
to VIN and sets the thresholds for converter operation.
FS (Pin 5): A resistor connected from this pin to ground
sets the frequency of operation.
SYNC (Pin 6): Input to synchronize the oscillator to an
external source.
ISENSE (Pin 7): Performs two functions: for current mode
control, it monitors the switch current, using the voltage
across an external current sense resistor. Pin 7 also injects
a current ramp that develops slope compensation voltage
across an optional external programming resistor.
OC (Pin 8): Overcurrent Pin. Connect this pin to the ex-
ternal switch current sense resistor. An additional resistor
programs the overcurrent trip level.
VCC (Pin 9): Supply Pin. A capacitor must closely decouple
VCC to GND (Exposed Pad).
GATE (Pin 10): Gate Drive for the External N-Channel
MOSFET. This pin swings from GND to VCC.
Exposed Pad (Pin 11): Ground. A capacitor must closely
decouple GND to VCC (Pin 9). Must be soldered to electri-
cal ground on PCB.
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