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LM2825N-ADJ Datasheet

  • LM2825N-ADJ

  • Integrated Power Supply 1A DC-DC Converter

  • 12頁

  • NSC

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LM2825 Integrated Power Supply 1A DC-DC Converter
May 1997
LM2825
Integrated Power Supply 1A DC-DC Converter
General Description
The LM2825 is a complete 1A DC-DC Buck converter pack-
aged in a 24-lead molded Dual-In-Line integrated circuit
package.
Contained within the package are all the active and passive
components for a high efficiency step-down (buck) switching
regulator. Available in fixed output voltages of 3.3V, 5V and
12V, as well as two adjustable versions, these devices can
provide up to 1A of load current with fully guaranteed electri-
cal specifications.
Self-contained, this converter is also fully protected from out-
put fault conditions, such as excessive load current, short
circuits, or excessive temperatures.
Features
n
n
n
n
n
n
n
n
n
n
n
Minimum design time required
3.3V, 5V and 12V fixed output versions
Two adjustable versions allow 1.23V to 15V outputs
Wide input voltage range, up to 40V
Low-power standby mode, I
Q
typically 65 碌A(chǔ)
High efficiency, typically 80%
鹵
4% output voltage tolerance
Excellent line and load regulation
TTL shutdown capability/programmable Soft-start
Thermal shutdown and current limit protection
鈭?0藲C to +85藲C ambient temperature range
Highlights
n
No external components required (fixed output voltage
versions)
n
Integrated circuit reliability
n
MTBF over 20 million hours
n
Radiated EMI meets Class B stipulated by CISPR 22
n
High power density, 35 W/in
3
n
24-pin DIP package profile (1.25 x 0.54 x 0.26 inches)
Applications
n
n
n
n
n
Simple high-efficiency step-down (buck) regulator
On-card switching regulators
Efficient pre-regulator for linear regulators
Distributed power systems
DC/DC module replacement
Connection Diagram
DS012661-27
Standard Application
(Fixed output voltage versions)
DS012661-2
鈥淣C (Do not use)鈥?pins: See
Figure 11.
Top View
DS012661-1
Ordering Information
Order Number LM2825N-3.3, LM2825N-5.0, LM2825N-12,
LM2825N-ADJ or LM2825HN-ADJ
See NS Package Number NA24F
Radiated EMI
Radiated emission of electromagnetic fields is measured at
10m distance. The emission levels are within the Class B
limits stipulated by CISPR 22.
30. . . .230 MHz
230. . . .1000 MHz
1. . . .10 GHz
30 dB 碌V/m
37 dB 碌V/m
46 dB 碌V/m
漏 1997 National Semiconductor Corporation
DS012661
www.national.com

LM2825N-ADJ 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 40 V

  • 150 KHz

  • 1.23 V to 15 V

  • 1 A

  • 1

  • + 85 C

  • Through Hole

  • PDIP-24

  • - 40 C

  • Tube

  • 12

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