參數(shù)資料
型號(hào): LM2597M-12
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features
中文描述: 1.4 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PDSO8
封裝: PLASTIC, SOIC-8
文件頁數(shù): 7/34頁
文件大小: 900K
代理商: LM2597M-12
Typical Performance Characteristics
(Continued)
V
IN
and V
Current vs
V
BS
and Temperature
DS012440-17
Soft-start Response
DS012440-18
Shutdown /Soft-start
Threshold Voltage
DS012440-25
Continuous Mode Switching Waveforms
V
= 20V, V
OUT
= 5V, I
= 400 mA
L = 100 μH, C
OUT
= 120 μF, C
OUT
ESR = 140 m
DS012440-19
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.2A/div.
C: Output Ripple Voltage, 20 mV/div.
Horizontal Time Base: 2 μs/div.
Discontinuous Mode Switching Waveforms
V
= 20V, V
OUT
= 5V, I
= 200 mA
L = 33 μH, C
OUT
= 220 μF, C
OUT
ESR = 60 m
DS012440-20
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.2A/div.
C: Output Ripple Voltage, 20 mV/div.
Horizontal Time Base: 2 μs/div.
Load Transient Response for Continuous Mode
V
= 20V, V
OUT
= 5V, I
= 200 mA to 500 mA
L = 100 μH, C
OUT
= 120 μF, C
OUT
ESR = 140 m
DS012440-21
A: Output Voltage, 50 mV/div. (AC)
B: 200 mA to 500 mA Load Pulse
Horizontal Time Base: 50 μs/div.
Load Transient Response for Discontinuous Mode
V
= 20V, V
OUT
= 5V, I
= 100 mA to 200 mA
L = 33 μH, C
OUT
= 220 μF, C
OUT
ESR = 60 m
DS012440-22
A: Output Voltage, 50 mV/div. (AC)
B: 100 mA to 200 mA Load Pulse
Horizontal Time Base: 200 μs/div.
L
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