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The National
Semiconductor LM5000 Family
National Semiconductor's LM5000 family of voltage
regulators are the first fully integrated switching regulator
circuits that operate from 10 to 100 volts for high voltage
power conversion applications.
This high-voltage product capability is critical in base
stations, servers, cars, and other systems that have demanding
power needs.
A
new generation in DC/DC conversion:
high-voltage, high-frequency
simple switcher ICs |
|
LM5000/7
now available in the industry’s smallest packages
 |
LM5007
-
80V
internal power MOSFET, 0.5A peak
-
High-voltage
start-up regulator
-
Programmable
output voltage
-
Thermal
shutdown
-
Programmable
current limit
-
Line
under-voltage lockout
-
Low-power
shutdown mode
-
On-timer
varies inversely with line voltage
-
Operating
frequency remains constant with varying line
voltage
-
Ultra-fast
transient response
-
No
control loop compensation required
-
Available
in MSOP-8 and LLP-8 packages
|
|
 |
LM5000
- 80V
internal power MOSFET, 2A peak
- High-voltage
start-up regulator
- Programmable
output voltage
- Thermal
shutdown
- Programmable
current limit
- Line
under-voltage lockout
- Low-power
shutdown mode
- Configurable
as flyback, boost, or forward regulator
- Programmable
control loop compensation
- Pin-selectable
frequencies (0.3/0.6/0.7/1.25 MHz)
- Available
in TSSOP-16 and LLP-16 packages
|
|
Ideal
for use in telecommunications power systems, automotive
power systems, –48V distributed power systems, and
battery-powered applications. National. Powering innovation. First
in technology, performance and packaging.
Simplify
telecom power conversion –
new LM5030 100V PWM controller
with LM5642 dual buck regulator |
|
3G
Basestations: 850W Push-Pull DC/DC converter >90%
efficiency
 
|
LM5030
- Fully
integrated LM5030 includes: high bandwidth error
amp, precision reference, programmable softstart,
and dual-mode current sense
- Internal
high-voltage (100V) start-up regulator
- Single
resistor oscillator setting
- Synchronisable
to external clock
- 1A
sink/source drivers
- Thermal
shutdown
- Single
resistor oscillator setting
- Synchronizable
to external clock
- 1A
sink/source drivers
- Thermal
shutdown
|
|
DSL
Line Card: –48V multi-output isolated power supply
© National Semiconductor Corporation,
2003. National Semiconductor and are registered trademarks
of National Semiconductor Corporation.
All rights reserved. |
Primary
controller: LM5030 100 V current-mode Push-Pull
Secondary controller: LM5642 dual synchronous
buck
- 48VIN,
multiple outputs ±12V, 1.8V, and 1.5VOUT
- High
efficiency >90%
- Tight
regulation <2%
- Oscillators
synchronized to a master clock
- User-programmable
softstart and power
on/off sequencing
- Available
separately or together:
– LM5030 (MSOP-10)
– LM5642 (TSSOP-28)
|
|
| |
Ideal
for use in telecom power systems, automotive power systems, –48V
distributed power systems, industrial power
supplies, and Push-Pull, half-bridge, and full-bridge converters
Better
than 90% efficiency with 48VIN, 2.5VOUT
@ 50A with no output inductors and <2% ripple! |
|
Highly
integrated LM5041 cascaded PWM controller and 100V synchronous
buck driver “chipset” with user programmable
edge delay
 
© National Semiconductor
Corporation, 2003. National Semiconductor and
are registered trademarks of National Semiconductor
Corporation.
All rights reserved.
|
LM5000
- Cascaded
controller mates with 100V synchronous buck driver(s)
(LM5100 and LM5102)
- Wide
range, 15V to 100V start-up bias regulator
- High-speed
2A peak push-pull MOSFET drivers
- Integrated
under-voltage lockout circuitry on
both low-side and high-side drivers
- User
programmable 1 MHz oscillator, external
clock synchronization capability, and 100 ns
current limit propagation delay (LM5041)
- Tiny
thermally-enhanced packaging
(LM5041) LLP-16 and TSSOP-16
(LM510x) LLP-10, SOIC-8, and MSOP-10
Ideal
for use in telecommunications power systems,
automotive power systems, –48V distributed
power systems, industrial power supplies, motor
driver systems (LM510x), push-pull, half-bridge,
and full-bridge converters.
|
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