参数资料
型号: LTC3632EDD#TRPBF
厂商: LINEAR INTEGRATED SYSTEMS INC
元件分类: 稳压器
英文描述: 0.06 A SWITCHING REGULATOR, PDSO8
封装: 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-1, DFN-8
文件页数: 8/20页
文件大小: 247K
代理商: LTC3632EDD#TRPBF
LTC3632
16
3632f
APPLICATIONS INFORMATION
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the LTC3632. Check the following in your layout:
1. Large switched currents ow in the power switches
and input capacitor. The loop formed by these compo-
nents should be as small as possible. A ground plane
is recommended to minimize ground impedance.
2. Connect the (+) terminal of the input capacitor, CIN, as
close as possible to the VIN pin. This capacitor provides
the AC current into the internal power MOSFETs.
3. Keep the switching node, SW, away from all sensitive
small signal nodes. The rapid transitions on the switching
node can couple to high impedance nodes, in particular
VFB, and create increased output ripple.
4. Flood all unused area on all layers with copper. Flooding
with copper will reduce the temperature rise of power
components. You can connect the copper areas to any
DC net (VIN, VOUT, GND or any other DC rail in your
system).
TYPICAL APPLICATIONS
Figure 10. High Efciency 5V Regulator
3.3V, 20mA Regulator with Peak Current Soft-Start, Small Size
Soft-Start Waveforms
VIN
LTC3632
RUN
CIN
4.7μF
HYST
3632 F10a
SW
VIN
5V TO 50V
VOUT
5V
20mA
VFB
SS
ISET
GND
L1
1mH
R1
4.2M
R2
800k
CIN: TDK C5750X7R2A475MT
COUT: AVX 1812D107MAT
L1: COILCRAFT LPS6235-105ML
COUT
100μF
CSS
470nF
OUTPUT
VOLTAGE
1V/DIV
INDUCTOR
CURRENT
20mA/DIV
2ms/DIV
3632 TA03b
VIN
LTC3632
RUN
CIN
1μF
SS
3632 TA03a
SW
VIN
4.5V TO 24V
VOUT
3.3V
20mA
VFB
HYST
ISET
GND
L1
470μH
R1
294k
R2
93.1k
CIN: TDK C3216X7R1E105KT
COUT: AVX 08056D106KAT2A
L1: MURATA LQH43CN471K03
COUT
10μF
CSS
0.1μF
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