参数资料
型号: LT1933HS6#TRMPBF
厂商: Linear Technology
文件页数: 10/20页
文件大小: 0K
描述: IC REG BUCK ADJ 0.6A TSOT23-6
标准包装: 500
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 1.25 V ~ 31.7 V
输入电压: 3.6 V ~ 36 V
PWM 型: 电流模式
频率 - 开关: 500kHz
电流 - 输出: 600mA
同步整流器:
工作温度: -40°C ~ 150°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
LT1933
APPLICATIONS INFORMATION
Figure 1 shows the transient response of the LT1933 with
several output capacitor choices. The output is 3.3V. The
load current is stepped from 100mA to 400mA and back to
100mA, and the oscilloscope traces show the output volt-
age. The upper photo shows the recommended value. The
second photo shows the improved response (less voltage
drop) resulting from a larger output capacitor and a phase
lead capacitor. The last photo shows the response to a high
performance electrolytic capacitor. Transient performance
is improved due to the large output capacitance, but output
ripple (as shown by the broad trace) has increased because
of the higher ESR of this capacitor.
16.5k
V OUT
V OUT
50mV/DIV
FB
22μF
10k
I OUT
200mA/DIV
1933 F01a
V OUT
V OUT
16.5k
FB
470pF
22μF
50mV/DIV
2x
10k
I OUT
200mA/DIV
1933 F01b
16.5k
+
V OUT
V OUT
50mV/DIV
FB
10k
100μF
SANYO
4TPB100M
I OUT
200mA/DIV
1933 F01c
Figure 1. Transient Load Response of the LT1933 with Different
Output Capacitors as the Load Current is Stepped from 100mA
to 400mA. V IN = 12V, V OUT = 3.3V, L = 22μH.
1933fe
10
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