LM2593HVEVAL National Semiconductor, LM2593HVEVAL Datasheet - Page 8

• Manufacturer Part Number: LM2593HVEVAL
• Description: BOARD EVALUATION LM2593
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r

Specifications of LM2593HVEVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 12V
• Current - Output: 2A
• Voltage - Input: 4.5 ~ 60V
• Regulator Topology: Buck
• Frequency - Switching: 150kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM2593
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

www.national.com
Test Circuit and Layout Guidelines
Component Values shown are for V
V
C
C
D1
L1
Select R
Component Values shown are for V
V
C
C
D1 — 3.3A, 60V Schottky Rectifier, 31DQ06 (International Rectifier)
L1 — 47 µH, See Inductor Selection Procedure
R
R
C
Typical Values
C
C
R
drag feedback pin below ground). Required if V
†
††
OUT
IN
OUT
OUT
IN
OUT
1
2
FF
SS
DELAY
PULL UP
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 (C
:
— 1 k , 1%
— 7.15k, 1%
— 0.1 µF
— 3.3 nF
—
—
:
= 5V, I
—
= 10V, I
— 470 µF, 35V, Aluminum Electrolytic Nichicon “PM Series”
— 0.1 µF
—
1
— 220 µF, 35V Aluminum Electrolytic, Nichicon “PM Series”
33 µH, See Inductor Selection Procedure
3.3A, 60V Schottky Rectifier, 31DQ06 (International Rectifier)
to be approximately 1 k , use a 1% resistor for best stability.
— 4.7k (use 22k if V
470 µF, 50V, Aluminum Electrolytic Nichicon “PM Series”
LOAD
220 µF, 25V Aluminum Electrolytic, Nichicon “PM Series”
LOAD
= 2A.
= 2A.
OUT
IN
IN
is
= 15V,
= 20V,
45V)
FIGURE 1. Standard Test Circuits and Layout Guides
IN
>
40V
Adjustable Output Voltage Versions
Fixed Output Voltage Versions
8
FF
not being able to discharge immediately will
10133325
10133324