S5ELM2576 Datasheet, PDF (1/8 Pages) SeCoS Halbleitertechnologie GmbH – Simple Switcher 3A Step-Down Voltage Regulator

Elektronische Bauelemente
S5ELM2576
Simple Switcher
3A Step-Down Voltage Regulator
Description
The S5ELM2576 series of regulators are monolithic integrated
circuits that provide all active functions for a step-down (buck)
switching regulator, capable of driving 3A load with excellent line
and load regulation. These devices are available in fixed output
voltage of 3.3V,5V,12V,15V and an adjustable output version.
Requiring a min. rumber of external components, these regulators
are simple to use and include internal frequency components and
a fixed-frequency oscillator. The S5ELM2576 series offers a high-
efficiency replacement for popular three-terminal linear regulators.
If substantially reduces the size of the heat sink, and in some
cases no heat sink is required. A standard series if inductors
optimized for use with the S5ELM2576 are available from several
different manufactures. The feature greatly simplifies the design
of switching-mode power supplies. Other feature include a
guaranteed ±4% to tolerance on output voltage within specified
input voltages and output load condition, and ^±10% on the
oscillator frequency. External shutdown is included, featuring
50uA(Typ.) standby current. The output switch includes cycle-by-
cycle current limiting, as well as thermal shutdown for full
protection under fault condition.
Features
* High Efficiency
* Wide Input Voltage Range
* 52KHz Fixed Frequency Oscillator
* 3.3V,5V,12V,15V and Adjustable Output Versions
* Uses Readily Available Standard Inductors
* TTL Shutdown Capability, Low Power Standby Mode
* Thermal Shutdown And Current Limit Protection
* Guaranteed 3A Output Current
* Efficient Per-regulator For Linear Regulators
* Requires Only 4 Extermal Components
* Adjustable Version Output Voltage Range,
1.23V to 37V ±4% Max. Over Line And Load Conditions
Applications
* Positive To Negative Converter (Buck-Boost)
* Simple High-Effciency Step-Down (Buck) Regulator
* One-Card Switching Regulators
REF.
A
b
c
D
E
L4
Millimeter
Min. Max.
4.40 4.80
0.76 1.00
0.36 0.50
8.60 9.00
9.80 10.4
14.7 15.3
REF.
c1
b1
L
e
L1
Ø
Millimeter
Min. Max.
1.25 1.45
1.17 1.47
13.25 14.25
2.54 REF.
2.60 2.89
3.71 3.96
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
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