参数资料
型号: LTC3426ES6#TRPBF
厂商: Linear Technology
文件页数: 4/12页
文件大小: 0K
描述: IC REG BOOST ADJ 2A TSOT23-6
标准包装: 2,500
类型: 升压(升压)
输出类型: 可调式
输出数: 1
输出电压: 2.25 V ~ 5.5 V
输入电压: 1.6 V ~ 4.3 V
PWM 型: 电流模式
频率 - 开关: 1.2MHz
电流 - 输出: 2A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SOT-23-6 细型,TSOT-23-6
包装: 带卷 (TR)
供应商设备封装: TSOT-23-6
LTC3426
PI FU CTIO S
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:
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.
V OUT = 1 . 22 ? ? 1 +
?
?
?
R 1 ?
R 2 ?
BLOCK DIAGRA
V OUT
V IN
SW
1.22V
REFERENCE
+
COMPARATOR
5
6
1
A1
R C
C C
+
A2
PWM LOGIC
AND DRIVER
3
FB
V OUT
R1 (EXTERNAL)
FB
R2 (EXTERNAL)
SHDN
Σ
RAMP
GENERATOR
0.02 ?
4
SHUTDOWN AND
SOFT-START
1.2MHz
OSCILLATOR
2
3426 F01
GND
Figure 1
3426fa
4
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