LM2591HVS-ADJ/NOPB National Semiconductor, LM2591HVS-ADJ/NOPB Datasheet - Page 8

• Manufacturer Part Number: LM2591HVS-ADJ/NOPB
• Description: IC REG SIMPLE SWITCHER TO263-5
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2591HVS-ADJ/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.2 ~ 57 V
• Current - Output: 1A
• Frequency - Switching: 150kHz
• Voltage - Input: 4.5 ~ 60 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (5 leads + tab)
• 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
• Msl: MSL 3 - 168 Hours
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2591HVS-ADJ; LM2591HVS-ADJ

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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