參數(shù)資料
型號(hào)： LTC3426
廠商： Linear Technology Corporation
英文描述： 1.2MHz Step-Up DC/DC Converter in SOT-23
中文描述： 1.2MHz升壓型DC / DC轉(zhuǎn)換器采用SOT - 23
文件頁(yè)數(shù)： 4/12頁(yè)
文件大?。?/td> 152K
代理商： LTC3426
4
LTC3426
3426f
PIU
SW (Pin 1):
Switch Pin. Connect inductor between SW and
V
IN
. A Schottky diode is connected between SW and V
OUT
.
Keep these PCB trace lengths as short and wide as
possible to reduce EMI and voltage overshoot. If the
inductor current falls to zero, an internal 100
antiringing
switch is connected from SW to V
IN
to minimize EMI.
GND (Pin 2):
Signal and Power Ground. Provide a short
direct PCB path between GND and the (–) side of the output
capacitor(s).
FB (Pin 3):
Feedback Input to the g
m
Error Amplifier.
Connect resistor divider tap to this pin. The output voltage
can be adjusted from 2.5V to 5V by:
V
R
R
OUT
=
+
1 22
.
1
1
2
SHDN (Pin 4):
Logic Controlled Shutdown Input.
SHDN = High: Normal free running operation
SHDN = Low: Shutdown, quiescent current < 1
μ
A
Typically, SHDN should be connected to V
IN
through a 1M
pull-up resistor.
V
OUT
(Pin 5):
Output Voltage Sense Input. The NMOS
switch gate drive is derived from the greater of V
OUT
and
V
IN
.
V
IN
(Pin 6):
Input Supply. Must be locally bypassed.
BLOCK DIAGRA
Figure 1
4
SHUTDOWN AND
SOFT-START
1.22V
REFERENCE
RAMP
GENERATOR
1.2MHz
OSCILLATOR
3426 F01
PWM LOGIC
AND DRIVER
Σ
–
+
3
FB
FB
V
OUT
SHDN
SW
1
A1
–
+
–
+
A2
R
C
R2 (EXTERNAL)
R1 (EXTERNAL)
0.02
C
C
GND
2
V
IN
6
V
OUT
5
COMPARATOR
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3426ES6 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 1.6V to 4.3V 6-Pin TSOT-23
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