参数资料
型号: LT3467IS5
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: 2.5 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO6
封装: 1 MM HEIGHT, PLASTIC, MO-193, TSOT-23, 6 PIN
文件页数: 12/16页
文件大小: 245K
代理商: LT3467IS5
5
LT3467/LT3467A
3467afc
Figure 1. Block Diagram
+
+
RQ
S
0.01
Ω
SW
DRIVER
COMPARATOR
SHDN
VIN
SS
FB
+
Σ
RAMP
GENERATOR
1.255V
REFERENCE
RC
CC
1.3MHz
OSCILLATOR*
GND
3467 F01
Q1
A2
A1
R1 (EXTERNAL)
R2 (EXTERNAL)
FB
VOUT
SHUTDOWN
250k
*2.1MHz FOR LT3467A
(DFN/TSOT)
FB (Pin 1/Pin 3): Feedback Pin. Reference voltage is
1.255V. Connect resistive divider tap here. Minimize trace
area at FB. Set VOUT = 1.255V(1 + R1/R2).
GND (Pins 2, 5, 9/Pin 2): Ground. Tie directly to local
ground plane.
SW (Pins 3, 4/Pin 1): Switch Pin. (Collector of internal
NPN power switch) Connect inductor/diode here and
minimize the metal trace area connected to this pin to
minimize EMI.
VIN (Pin 6/Pin 6): Input Supply Pin. Must be locally
bypassed.
SS (Pin 7/Pin 5): Soft-Start Pin. Place a soft-start capaci-
tor here. Upon start-up, 4
μAofcurrentchargesthecapaci-
tor to 1.255V. Use a larger capacitor for slower start-up.
Leave floating if not in use.
SHDN (Pin 8/Pin 4): Shutdown Pin. Tie to 2.4V or more to
enable device. Ground to shut down.
UU
U
PI FU CTIO S
BLOCK DIAGRA
W
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