LM2591HVT-ADJ National Semiconductor, LM2591HVT-ADJ Datasheet - Page 8

• Manufacturer Part Number: LM2591HVT-ADJ
• Description: IC, STEP-DOWN REGULATOR, TO-220-5
• Manufacturer: National Semiconductor

Specifications of LM2591HVT-ADJ

• Primary Input Voltage: 60V
• No. Of Outputs: 1
• Output Voltage: 57V
• Output Current: 1A
• No. Of Pins: 5
• Operating Temperature Range: -40°C To +125°C
• Supply Voltage Range: 4.5V To 60V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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 — 2A, 60V Schottky Rectifier, 21DQ06 (International Rectifier)
L1 — 100 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
Small signal Schottky diode to prevent damage to feedback pin by negative spike when output is shorted (C
:
— 1 kΩ, 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”
68 µH, See Inductor Selection Procedure
2A, 60V Schottky Rectifier, 21DQ06 (International Rectifier)
to be approximately 1 kΩ, 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
= 1A.
= 1A.
OUT
IN
IN
is ≥ 45V)
= 15V,
= 20V,
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
10129325
10129324