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參數(shù)資料
| 型號： | LTC3534EGN#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1150 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 18/20頁 |
| 文件大小： | 218K |
| 代理商： | LTC3534EGN#TR |
LTC3534
7
3534f
GND Pads (Pins 1, 8, 9, 16; GN Package): IC Substrate
Grounds. These pins MUST be soldered to the printed
circuit board ground to provide both electrical contact
and a good thermal contact to the PCB.
RUN/SS (Pin 2): Combined Shutdown and Soft-Start. Ap-
plying a voltage below 400mV shuts down the IC. Apply
a voltage above 1.4V to enable the IC and above 2.4V to
ensure that the error amp is not clamped from soft-start.
An R-C from the enable command signal to this pin will
provide a soft-start function by limiting the rise time of
the VC pin.
GND (Pin 3): Signal Ground for the IC.
PGND1, PGND2 (Pins 4, 7): Power Ground for the In-
ternal N-channel MOSFET Power Switches (Switches B
and C).
SW1 (Pin 5): Switch Pin where Internal Switches A and
B are Connected. Connect inductor from SW1 to SW2.
Minimize trace length to reduce EMI.
SW2 (Pin 6): Switch Pin where Internal Switches C and D
are Connected. Minimize trace length to reduce EMI.
PWM (Pin 10): Burst Mode Select. Applying a voltage
below 400mV enables Burst Mode operation, providing a
signicant efciency improvement at light loads. During the
period where the IC is supplying energy to the output, the
inductor peak current will reach 400mA typical and return
to zero current on each cycle. Burst Mode operation will
continue until this pin is driven high. Applying a voltage
above 1.4V disables Burst Mode operation, enabling low
noise, xed frequency operation.
VOUT (Pin 11): Output of the Synchronous Rectier. A
lter capacitor is placed from VOUT to GND. A ceramic
bypass capacitor is recommended as close to the VOUT
and GND pins as possible. VOUT is given by the following
equation:
VOUT = 1.000
R1
+R2
R2
V
PVIN (Pin 12): Power VIN Supply Pin. A 10μF ceramic
capacitor is recommended as close to the PVIN and PGND
pins as possible.
VIN (Pin 13): Input Supply Pin. Connect the power source
to this pin.
VC (Pin 14): Error Amp Output. An R-C network is con-
nected from this pin to FB for loop compensation. Refer
to “Closing the Feedback Loop” section for component
selection guidelines.
FB (Pin 15): Feedback Pin. Connect VOUTresistordividertap
to this pin. The output voltage can be adjusted from 1.8V
to 7V. The feedback reference voltage is typically 1V.
Exposed Pad (Pin 17; DHC Package): IC Substrate Ground.
This pin MUST be soldered to the printed circuit board
ground to provide both electrical contact and a good
thermal contact to the PCB.
PIN FUNCTIONS
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