Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 1/10 PL2576

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 1/10 PL2576

Datasheet Thumbnail

Top Searches for this datasheet

Simple Switcher Step- Down Voltage Regulator
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 1/10
PL2576-XXXF5
Features
3.3V, 12V, 15V, adjustable output versions. Adjustable version output voltage range, 1.23V 37V±4% over line load conditions. Guaranteed output current. Wide input voltage range. Requires only external components fixed frequency oscillator shutdown capability, power standby mode. High efficiency Uses readily available standard inductors. Thermal shutdown current limit protection.
TO-263-5L
Description
PL2576-XXXF5 series regulators monolithic integrated circuits that provide active functions step-down (buck) switching regulator, capable driving load with excellent line load regulation. These devices available fixed output voltages 3.3V, 12V, 15V, adjustable output version. Requiring minimum number external components, these regulators simple include internal frequency compensation fixed-frequency oscillator. PL2576-XXXF5 series offers high-efficiency replacement popular three-terminal linear regulators. substantially reduces size heat sink, some cases heat sink required. standard series inductors optimized with PL2576 available from several different manufacturers. This feature greatly simplifies design switch-mode power supplies. Other features include guaranteed tolerance output voltage within specified input voltages output load conditions, ±10% oscillator frequency. External shutdown included, featuring 50µA (typical) standby current. output switch includes cycle-by-cycle current limiting, well thermal shutdown full protection under fault conditions.
Applications
Simple high-efficiency step-down (buck) regulator. Efficient pre-regulator linear regulators. On-card switching regulators. Positive negative converter (Buck-Boost).
PL2576-XXXF5
CYStek Product Specification
Typical Application (Fixed Output Voltage Version)
7V-40V unregulated input Feedback Output
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 2/10
+VIN
PL2576-5.0
100H 1N5822
regulated output load Cout 1000F
100F
ON/OFF
Figure.
Block Diagram
Unregulated Input
Internal Regulator
ON/OFF
Feedback
Fixed Gain Error
Comparator Driver
1.0k
Switch
Output
Vout Cout
1.23V band-gap reference
52kHz Oscillator
Reset
Thermal Current Shutdown Limit
3.3V, R2=1.7k R2=3.1k 12V, R2=8.84k 15V, R2=11.3k Adjustable version, R1=open, R2=0
Ordering Information
Temperature Range -40TA125 Output Voltage
Package Type
PL2576-3.3F5 PL2576-5.0F5 PL2576-12F5 PL2576-15F5 PL2576-ADJF5 TO-263-5L
PL2576-XXXF5
CYStek Product Specification
Absolute Maximum Ratings (Note
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 3/10
Maximum supply voltage .45V ON/OFF input voltage .-0.3VV+VIN Output voltage ground (steady state).-1V Power dissipation Internally limited Storage temperature range.-65°C +150°C Maximum junction temperature. .150°C Minimum rating (C=100pF, R=1.5k).2kV Lead temperature (Soldering, seconds). .260°C
Operating Ratings
Temperature range. .-40°C +125°C Supply voltage.40V
PL2576-3.3 Electrical Characteristics
Specifications with standard type face TJ=25°C, those with boldface type apply over full
operating temperature range Symbol Parameter Conditions 3.234 3.168/3.135 3.336 3.432/3.465 Units
System Parameters (Note Test Circuit Figure
VOUT VOUT Output Voltage VIN=12V, ILOAD=0.5A Circuit Figure 6VVIN40V, 0.5AILOAD3A Output Voltage Circuit Figure Efficiency VIN=12V, ILOAD=3A
PL2576-5.0 Electrical Characteristics
Specifications with standard type face TJ=25°C, those with boldface type apply over full
operating temperature range Symbol Parameter Conditions 4.800/4.750 5.200/5.250 Units
CYStek Product Specification
System Parameters (Note Test Circuit Figure
VOUT VOUT
PL2576-XXXF5
Output Voltage VIN=12V, ILOAD=0.5A Circuit Figure 8VVIN40V, 0.5AILOAD3A Output Voltage Circuit Figure Efficiency VIN=12V, ILOAD=3A
PL2576-12 Electrical Characteristics
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 4/10
Specifications with standard type face TJ=25°C, those with boldface type apply over full
operating temperature range Symbol Parameter Conditions 11.76 11.52/11.40 12.24 12.48/12.60 Units
System Parameters (Note Test Circuit Figure
VOUT VOUT Output Voltage VIN=25V, ILOAD=0.5A Circuit Figure 15VVIN40V, 0.5AILOAD3A Output Voltage Circuit Figure Efficiency VIN=15V, ILOAD=3A
PL2576-15 Electrical Characteristics
Specifications with standard type face TJ=25°C, those with boldface type apply over full
operating temperature range Symbol Parameter Conditions 14.7 14.40/14.25 15.3 15.60/15.75 Units
System Parameters (Note Test Circuit Figure
VOUT VOUT Output Voltage VIN=25V, ILOAD=0.5A Circuit Figure 18VVIN40V, 0.5AILOAD3A Output Voltage Circuit Figure Efficiency VIN=18V, ILOAD=3A
PL2576-ADJ Electrical Characteristics
Specifications with standard type face TJ=25°C, those with boldface type apply over full
operating temperature range Symbol Parameter Feedback Voltage Feedback Voltage Efficiency Conditions VIN=12V, ILOAD=0.5A, VOUT=5V, Circuit Figure 8VVIN40V, 0.5AILOAD3A VOUT=5V, Circuit Figure VIN=12V, ILOAD=3A, VOUT=5V 1.230 1.230 1.217 1.193/1.180 1.243 1.267/1.280 Units
System Parameters (Note Test Circuit Figure
VOUT VOUT
PL2576-XXXF5
CYStek Product Specification
Output Voltage Versions Electrical Characteristics
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 5/10
Specifications with standard type face TJ=25°C, those with boldface type apply over full
operating temperature range. Unless otherwise specified, VIN=12V 3.3V, 5.0V, adjustable versions, VIN=25V version, VIN=30V version. ILOAD=500mA. Symbol VSAT ISTBY Parameter Conditions 47/42 4.2/3.5 100/500 58/63 1.8/2.0 6.9/7.5 Units
Feedback bias current VOUT=5V (adjustable version only) Oscillator frequency (Note Saturation voltage IOUT=3A (Note Maximum duty cycle (Note (ON) (Notes Current limit (Notes Output Output leakage current Output (Note Quiescent current Standby quiescent ON/OFF pin=5V (OFF) current
ON/OFF Control
ON/OFF logic input level ON/OFF input current VOUT=0V VOUT=Nominal output voltage ON/OFF pin=5V (OFF) ON/OFF pin=0V (ON) 2.2/2.4 1.0/0.8
Note Absolute Maximum Ratings indicate limits beyond which damage device occur. Operating Ratings indicate conditions which device intended functional, guarantee specific performance limits. guaranteed specifications test conditions, Electrical Characteristics. Note limits guaranteed room temperature (standard type face) temperature extremes (bold type face). Note External components such catch diode, inductor, input output capacitors affect switching regulator system performance. When PL2576 used shown figure test circuit, system performance will shown system parameters section Electrical Characteristics. Note Output sourcing current. diode, inductor capacitor connected output. Note Feedback removed from output connected Note Feedback removed from output connected +12V Adjustable, 3.3V, versions, +25V versions, force output transistor OFF. Note VIN=40V. Note oscillator frequency reduces approximately event output short overload which causes regulated output voltage drop approximately from nominal output voltage. This self protection feature lowers average power dissipation lowering minimum duty cycle from down approximately
PL2576-XXXF5
CYStek Product Specification
Typical Performance Characteristics (circuit Figure
Norm alized Output Voltage
-0.2 -0.4 -0.6 -0.8 Junction Temperature()
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 6/10
Line Regulation
20V,ILOAD 500mA Normalized
-0.2 -0.4 -0.6
ILOAD 500mA,
3.3V,
Input Voltage(V)
Dropout Voltage
1.75 1.25
Standby Quiescent Current
VIN=40V
ILOAD=3A ILOAD=1A
0.75 0.25 Junction Temperature()
VON/OFF
150H Rind
ILOAD=0.2A
Junction Temperature() VIN=12V
Quiescent Current
Input Voltage
Current
VOUT measured ground pin,
=25V
ILOAD=3A
ILOAD=0.2A
Junction Temperature
PL2576-XXXF5
CYStek Product Specification
Switch Saturation Voltage
Switch Current
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 7/10
Efficiency
ILOAD ILOAD 0.2A ILOAD ILOAD 0.2A
Input Voltage
Oscillator Frequency
Junction Temperature
Minim Operating Voltage
Normalized
Adjustable version only
VOUT 1.23V ILOAD 0.5A
Junction Temperature
Quiescent Current Duty Cycle
17.5 12.5 Duty Cycle
PL2576-XXXF5
Feedback Voltage Duty Cycle
Adjustable version only ILOAD 0.5A VIN=7V
Adjustable version only ILOAD 0.5A VIN=40V
VIN=40V
Duty Cycle
CYStek Product Specification
VIN=7V
Minim Power Dissipation
Ambient Temperature
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 8/10
Feedback Current
32/W 37/W 50/W
Adjustable version only
73/W
-100 Junction Temperature
Switching Waveforms
Load Current
Load Transient Response
100mV Output Voltage Change -100mV
VOUT=15V Output Voltage, Output Current, Inductor Current, Output Ripple Voltage, 50mV Coupled Horizontal Time Base
PL2576-XXXF5
CYStek Product Specification
Test Circuit Layout Guidelines
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 9/10
switching regulator, layout very important. Rapidly switching currents associated with wiring inductance generate voltage transients which cause problems. minimal inductance ground loops, length leads indicated heavy lines should kept short possible. Single-point grounding indicated) ground plane construction should used best results. When using Adjustable version, physically locate programming resistors near regulator, keep sensitive feedback wiring short.
Fixed Output Voltage Versions
+Vin Unregulated Input
PL2576 Fixed Output
Feedback Output 100H
Vout
100F
MBR360
Cout 1000F
Cin-100F, 75V, Aluminum Electrolytic Cout-1000F, 25V, Aluminum Electrolytic D1-Schottky, MBR360 L1-100H, Pulse Eng, PE92108 R1-2k, 0.1% R2-6.12k, 0.1%
Adjustable Output Voltage Version
+Vin 7V-40V Unregulated Input
Feedback
PL2576-ADJ
Output 100H
Vout 5.00V
100F
MBR360
Cout 1000F
Vout=VREF(1+ R2=R1( Vout VREF
where VREF=1.23V, between
Figure
PL2576-XXXF5 CYStek Product Specification
TO-263-5L Dimension
Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 10/10
Marking:
2576-XXX
Style: 1.Vin 2.Vout 3.GND 4.Feedback 5.ON/OFF 5-Lead TO-263-5L Plastic Package CYStek Package Code:
Typical
Inches Min. Max. 0.176 0.184 0.006 0.061 0.069 0.028 0.036 0.012 0.021 0.046 0.054 0.389 0.401
Millimeters Min. Max. 4.47 4.67 0.150 1.560 1.760 0.710 0.910 0.310 0.530 1.170 1.370 9.880 10.180
Inches Min. Max. 0.323 0.339 0.067(typical) 0.264 0.272 0.596 0.612 0.200 0.216 0.092 0.108 0.220REF
Millimeters Min. Max. 0.820 0.860 1.700(typical) 0.670 0.690 15.140 15.540 5.080 5.480 2.340 2.740 5.600REF
Notes: 1.Controlling dimension: inch
2.Maximum lead thickness includes lead finish thickness, minimum lead thickness minimum thickness base material. 3.If there question with packing specification packing method, please contact your local CYStek sales office.
Material:
Lead: Alloy solder plating Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
Important Notice:
rights reserved. Reproduction whole part prohibited without prior written approval CYStek. CYStek reserves right make changes products without notice. CYStek semiconductor products warranted suitable Life-Support Applications, systems. CYStek assumes liability consequence customer product design, infringement patents, application assistance.
PL2576-XXXF5
CYStek Product Specification

Spec. C543F5 Issued Date 2004.02.27 Revised Date Page 1/10 PL2576

Top Searches for this datasheet

Other recent searches