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LM2593HVS-3.3 数据表(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM2593HVS-3.3
功能描述  SIMPLE SWITCHER Power Converter 150 kHz 2A Step-Down Voltage Regulator, with Features
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM2593HVS-3.3 数据表(HTML) 8 Page - National Semiconductor (TI)

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Test Circuit and Layout Guidelines
Fixed Output Voltage Versions
10133324
Component Values shown are for VIN = 15V,
VOUT = 5V, ILOAD = 2A.
CIN
470 µF, 50V, Aluminum Electrolytic Nichicon “PM Series”
COUT
220 µF, 25V Aluminum Electrolytic, Nichicon “PM Series”
D1
3.3A, 60V Schottky Rectifier, 31DQ06 (International Rectifier)
L1
33 µH, See Inductor Selection Procedure
Adjustable Output Voltage Versions
10133325
Select R1 to be approximately 1 kΩ, use a 1% resistor for best stability.
Component Values shown are for VIN = 20V,
VOUT = 10V, ILOAD = 2A.
CIN:
— 470 µF, 35V, Aluminum Electrolytic Nichicon “PM Series”
COUT:
— 220 µF, 35V Aluminum Electrolytic, Nichicon “PM Series”
D1 — 3.3A, 60V Schottky Rectifier, 31DQ06 (International Rectifier)
L1 — 47 µH, See Inductor Selection Procedure
R1 —1 kΩ,1%
R2 — 7.15k, 1%
CFF — 3.3 nF
Typical Values
CSS — 0.1 µF
CDELAY — 0.1 µF
RPULL UP — 4.7k (use 22k if VOUT is ≥ 45V)
† Resistive divider is required to aviod exceeding maximum rating of 45V/3mA on/into flag pin.
†† Small signal Schottky diode to prevent damage to feedback pin by negative spike when output is shorted (CFF not being able to discharge immediately will
drag feedback pin below ground). Required if VIN > 40V
FIGURE 1. Standard Test Circuits and Layout Guides
www.national.com
8


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