LM2591HVS-3.3/NOPB National Semiconductor, LM2591HVS-3.3/NOPB Datasheet - Page 8
![IC REG SIMPLE SWITCHER TO263-5](/photos/7/0/70012/ts5b_sml.jpg)
LM2591HVS-3.3/NOPB
Manufacturer Part Number
LM2591HVS-3.3/NOPB
Description
IC REG SIMPLE SWITCHER TO263-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2591HVS-ADJNOPB.pdf
(20 pages)
Specifications of LM2591HVS-3.3/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
3.3V
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)
Dc To Dc Converter Type
Step Down
Pin Count
5 +Tab
Input Voltage
60V
Output Voltage
3.3V
Switching Freq
173KHz
Output Current
1A
Efficiency
77%
Package Type
TO-263
Output Type
Fixed
Switching Regulator
Yes
Mounting
Surface Mount
Input Voltage (min)
4.5V
Operating Temperature Classification
Automotive
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Compliant
Other names
*LM2591HVS-3.3
*LM2591HVS-3.3/NOPB
LM2591HVS-3.3
*LM2591HVS-3.3/NOPB
LM2591HVS-3.3
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