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부품번호 | PL2576-xxxF5 기능 |
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기능 | Simple Switcher 3A Step- Down Voltage Regulator | ||
제조업체 | Cystech Electonics | ||
로고 | |||
www.DataSheet4U.com
CYStech Electronics Corp. Spec. No. : C543F5
Issued Date : 2004.02.27
Revised Date :
Page No. : 1/10
Simple Switcher
3A Step- Down Voltage Regulator
PL2576-XXXF5
Features
3.3V, 5V, 12V, 15V, and adjustable output versions.
Adjustable version output voltage range, 1.23V to 37V±4% max over line
and load conditions.
Guaranteed 3A output current.
Wide input voltage range.
Requires only 4 external components
52 kHz fixed frequency oscillator
TTL shutdown capability, low power standby mode.
High efficiency
Uses readily available standard inductors.
Thermal shutdown and current limit protection.
TO-263-5L
Description
The PL2576-XXXF5 series of regulators are monolithic integrated circuits that provide all the 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 voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include internal
frequency compensation and a fixed-frequency oscillator.
The PL2576-XXXF5 series offers a high-efficiency replacement for popular three-terminal linear regulators. It
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 PL2576 are available from several different
manufacturers. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output
load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50µA (typical)
standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full
protection under fault conditions.
Applications
Simple high-efficiency step-down (buck) regulator.
Efficient pre-regulator for linear regulators.
On-card switching regulators.
Positive to negative converter (Buck-Boost).
PL2576-XXXF5
CYStek Product Specification
CYStech Electronics Corp. Spec. No. : C543F5
Issued Date : 2004.02.27
Revised Date :
Page No. : 4/10
PL2576-12 Electrical Characteristics
Specifications with standard type face are for TJ=25°C, and those with boldface type apply over full
operating temperature range
Symbol
Parameter
Conditions
Typ
System Parameters (Note 3) Test Circuit Figure 2
VOUT
Output Voltage VIN=25V, ILOAD=0.5A
Circuit of Figure 2
VOUT
Output Voltage
15V≤VIN≤40V, 0.5A≤ILOAD≤3A
Circuit of Figure 2
12
12
η
Efficiency
VIN=15V, ILOAD=3A
88
Min
11.76
11.52/11.40
Max Units
12.24
12.48/12.60
V
V
%
PL2576-15 Electrical Characteristics
Specifications with standard type face are for TJ=25°C, and those with boldface type apply over full
operating temperature range
Symbol
Parameter
Conditions
Typ
System Parameters (Note 3) Test Circuit Figure 2
VOUT
Output Voltage VIN=25V, ILOAD=0.5A
Circuit of Figure 2
15
VOUT
Output Voltage
18V≤VIN≤40V, 0.5A≤ILOAD≤3A
Circuit of Figure 2
3.3
η
Efficiency
VIN=18V, ILOAD=3A
88
Min
14.7
14.40/14.25
Max Units
15.3
15.60/15.75
V
V
%
PL2576-ADJ Electrical Characteristics
Specifications with standard type face are for TJ=25°C, and those with boldface type apply over full
operating temperature range
Symbol
Parameter
Conditions
Typ
System Parameters (Note 3) Test Circuit Figure 2
VOUT
VOUT
Feedback
Voltage
Feedback
Voltage
VIN=12V, ILOAD=0.5A,
VOUT=5V, Circuit of Figure 2
8V≤VIN≤40V, 0.5A≤ILOAD≤3A
VOUT=5V, Circuit of Figure 2
1.230
1.230
η
Efficiency
VIN=12V, ILOAD=3A,
VOUT=5V
77
Min
1.217
1.193/1.180
Max Units
1.243
1.267/1.280
V
V
%
PL2576-XXXF5
CYStek Product Specification
4페이지 CYStech Electronics Corp. Spec. No. : C543F5
Issued Date : 2004.02.27
Revised Date :
Page No. : 7/10
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
Switch Saturation Voltage
-55℃
25℃
150℃
0.5 1 1.5 2
Switch Current (A)
2.5
3
Oscillator Frequency
8
6 Normalized at 25℃
4
2
0
-2 VIN = 40V
-4
-6 VIN = 12V
-8
-75 -50 -25 0 25 50 75 100 125 150
Junction Temperature (℃)
Quiescent Current vs Duty Cycle
20
17.5 Adjustable version only
15 ILOAD = 0.5A
12.5
VIN=7V
10
7.5
VIN=40V
5
2.5
0
0 20 40 60 80
Duty Cycle (%)
PL2576-XXXF5
100
Efficiency
95
90 ILOAD = 3A
15V OUT
85
ILOAD = 0.2A
80
75 5V
ILOAD = 3A
70
65 TJ = 25℃
ILOAD = 0.2A
60
0
10 20 30 40
Input Voltage (V)
50
Minimum Operating Voltage
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
-50
Adjustable version only
VOUT ≒1.23V
ILOAD = 0.5A
-25 0 25 50 75 100 125
Junction Temperature (℃)
Feedback Voltage vs Duty Cycle
20
15
10
5
0
-5
-10
-15
-20
0
Adjustable version only
ILOAD = 0.5A
VIN=40V
VIN=7V
20 40 60 80
Duty Cycle (%)
100
CYStek Product Specification
7페이지 | |||
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부품번호 | 상세설명 및 기능 | 제조사 |
PL2576-xxxF5 | Simple Switcher 3A Step- Down Voltage Regulator | Cystech Electonics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |