LM2575-5.0WT Micrel Inc, LM2575-5.0WT Datasheet

IC REG BUCK 1A 5.0V TO-220-5

LM2575-5.0WT

Manufacturer Part Number
LM2575-5.0WT
Description
IC REG BUCK 1A 5.0V TO-220-5
Manufacturer
Micrel Inc
Type
Step-Down (Buck)r
Datasheet

Specifications of LM2575-5.0WT

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
1A
Frequency - Switching
42kHz ~ 63kHz
Voltage - Input
4 ~ 40 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Straight Leads)
Input Voltage
40V
Output Current
1A
Output Voltage
5V
No. Of Outputs
1
Supply Voltage Range
4V To 40V
No. Of Pins
5
Operating Temperature Range
-40°C To +85°C
Frequency
52kHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
576-1516-5
LM2575-5.0WT

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2575-5.0WT
Manufacturer:
MICREL
Quantity:
3 150
General Description
The LM2575 series of monolithic integrated circuits
provide all the active functions for a step-down (buck)
switching regulator. Fixed versions are available with a
3.3V, 5V, 12V, fixed output. Adjustable versions have an
output voltage range from 1.23V to 37V. Both versions are
capable of driving a 1A load with excellent line and load
regulation.
These regulators are simple to use because they require a
minimum number of external components and include
internal frequency compensation and a fixed-frequency
oscillator.
The LM2575 series offers a high efficiency replacement for
popular three-terminal adjustable linear regulators. It
substantially reduces the size of the heat sink, and in
many cases no heat sink is required.
A standard series of inductors available from several
different manufacturers are ideal for use with the LM2575
series. This feature greatly simplifies the design of switch-
mode power supplies.
The feedback voltage is guaranteed to ±2% tolerance for
adjustable versions, and the output voltage is guaranteed
to ±3% for fixed versions, within specified input voltages
and output load conditions. The oscillator frequency is
guaranteed to ±10%. External shutdown is included,
featuring less than 200µA standby current. The output
switch includes cycle-by-cycle current limiting and thermal
shutdown for full protection under fault conditions.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
___________________________________________________________________________________________________________
Typical Applications
May 2009
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
Unregulated
Note: Pin numbers are for TO-220 Package
DC Input
7V–40V
100µF
Fixed Regulation in Typical Application
C
IN
+
+V
IN
Gnd
1
LM2575-5.0
3
On/Off
5
4
Output
2
1N5822
Feedback
D1
330µH
L1
+
330µF
C
OUT
Regulated
+5V, 1A
Output
1
Features
• 3.3V, 5V, 12V, and adjustable output versions
• Voltage over specified line and load conditions:
• Guaranteed 1A output current
• Wide input voltage range
• Wide output voltage range
• Requires only 4 external components
• 52kHz fixed frequency internal oscillator
• Low power standby mode IQ typically <200µA
• 80% efficiency (adjustable version typically >80%)
• Uses readily available standard inductors
• Thermal shutdown and current limit protection
• 100% electrical thermal limit burn-in
Applications
• Simple high-efficiency step-down (buck) regulator
• Efficient pre-regulator for linear regulators
• On-card switching regulators
• Positive to negative converter (inverting Buck-Boost)
• Isolated flyback converter using minimum number of
• Negative boost converter
408
external components
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Unregulated
Note: Pin numbers are for TO-220 Package
Adjustable Regulation in Fixed Output Application
DC Input
7V–40V
100µF
V
52kHz Simple 1A Buck Regulator
C
OUT
Fixed version: ±3% max. output voltage
Adjustable version: ±2% max. feedback voltage
4V to 40V
1.23V to 37V
IN
+
= 1.23 1 +
+V
IN
Gnd
1
(
3
LM2575
On/Off
R2
R1
LM2575
)
5
4
Output
2
1N5822
Feedback
330µH
D1
L1
+
330µF
C
OUT
M9999-051209-B
Regulated
+5V, 1A
Output
R2 3.09k
R1 1k

Related parts for LM2575-5.0WT

LM2575-5.0WT Summary of contents

Page 1

... These regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator. The LM2575 series offers a high efficiency replacement for popular three-terminal adjustable linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required. ...

Page 2

... LM2575-5.0YWM –40° to +85°C LM2575-12YWM –40° to +85°C LM2575WT*/** –40° to +85°C LM2575-3.3WT** –40° to +85°C LM2575-5.0WT** –40° to +85°C LM2575-12WT** –40° to +85°C LM2575WU*/** –40° to +85°C LM2575-3.3WU** –40° to +85°C LM2575-5.0WU** – ...

Page 3

... NC 4 GND 16-Pin Plastic DIP (N) May 2009 5 ON/OFF GND 2 OUT 1 VIN PWR GND 16 VIN GND SIG GND 13 GND 12 GND ON/OFF 11 GND 10 NC PWR GND 9 ON/OFF 3 5 ON/OFF GND 2 OUT 1 VIN 5-Pin TO-263 ( 24-Pin Wide SOIC (WM) M9999-051209-B LM2575 OUT OUT NC VIN VIN NC ...

Page 4

... OUT Output Voltage LM2575-5.0 η Efficiency SYSTEM PARAMETERS, 12V REGULATORS (Note 3) Test Circuit Figure 1 Output Voltage V OUT Output Voltage LM2575-12 η Efficiency May 2009 (1) Operating Ratings Supply Voltage (V Junction Temperature Range (T = 25°C, and those with boldface type apply over full Operating ...

Page 5

... All limits at temperature extreme are guaranteed via testing. 3. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2575/LM1575 is used as shown in Figure 1 test circuit, system performance will be shown in system parameters section of Electrical Characteristics. ...

Page 6

... TO-3 socket—8112-AG7 (Augat Inc.) C — 100µF, 75V Aluminum Electrolytic IN C — 330µF, 15V Aluminum Electrolytic OUT D1 — Schottky, MBR360 L1 — 330µH, 415-0926 (AIE) 5-pin TO-220 socket — 2936 (Loranger Mfg. Co.) 4-pin TO-3 socket — 8112-AG7 (Augat Inc.) LM2575 M9999-051209-B ...

Page 7

... Efficiency 100 95 V OUT 90 85 200 OUT 65 60 0.8 1 INPUT VOLTAGE ( V) Feedback Pin Current 100 -25 -50 -75 -100 -75 -50 - 100 125150 Dropout Voltage 2 1.5 1.0 = 40V I = 200 0 12V IN 0 -75 -50 - 100125150 LM2575 = 5V = 12V 1A 200 OUT IND M9999-051209-B ...

Page 8

... Micrel, Inc. Typical Characteristics (continued) May 2009 Normalized Feedback Voltage 12V 200mA 15 Normalized -10 -15 -20 -25 -75 -50 - 100125150 * Adjustable version only 8 Feedback Voltage vs Duty Cycle 200 40V -10 -15 - 100 LM2575 M9999-051209-B ...

Page 9

... IN = 20V A: Output pin voltage 10V/div B: Output pin current 1A/div C: Inductor current 0.5A/div D: Output ripple voltage 20 mV/div. AC coupled Horizontal Time Base: 5µs/div 5 ON/OFF ON/OFF 1 AMP SWITCH DRIVER 2 OUT CURRENT LIMIT 3 GND 5 ON/OFF ON/OFF 1 AMP SWITCH DRIVER 2 OUT CURRENT LIMIT 3 GND LM2575 M9999-051209-B ...

Page 10

... PIN 1 0.030-0.110 (0.762-2.794) 0.020 0.040 (0.508) TYP (1.016) 0.125 MIN (3.175) 0.018±0.003 0.100±0.010 (0.457±0.076) (2.540±0.254) 16-Pin Plastic DIP (N) 24-Pin Wide SOIC (WM) 10 RAD 0.290-0.320 (7.336-8.128) 0-10 0.009-0.015 (0.229-0.381) +0.025 0.325 –0.015 +0.635 ( ) 8.255 –0.381 M9999-051209-B LM2575 ...

Page 11

... Micrel, Inc. May 2009 5-Pin TO-220 (T) 5-Pin TO-263 (T) 11 LM2575 M9999-051209-B ...

Page 12

... A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully May 2009 indemnify Micrel for any damages resulting from such use or sale. © 2000 Micrel, Incorporated. 12 LM2575 M9999-051209-B ...

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