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OCP2576 데이터시트 PDF




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부품번호 OCP2576 기능
기능 Simple Switch 3A Step-down Voltage Regulator
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OCP2576 데이터시트, 핀배열, 회로
OCP2576
Simple Switch 3A Step-down Voltage Regulator
„ Features
„ General Description
z Output voltage: 3.3V, 5V, 12V, 15V and adjustable The OCP2576 series of regulators are monolithic IC
output versions
that provide all the active function for a step-down
z Adjustable version output voltage range:1.23V to (buck) switching regulator, capable of driving 3A load
30V±4% max over line and load conditions
with excellent line and load regulation. These
z Guaranteed 3A output current
devices are available in fixed output voltages of
z Input voltage up to 36V
3.3V, 5V, 12V, 15V and an adjustable output version.
z
z
z
z
z
Requires only 4 external components
52KHz fixed frequency internal oscillator
TTL shutdown capability, low power standby mode
High efficiency
Thermal shutdown and current limit protection
Requiring a minimum number of external
components, these regulators are simple to use and
include internal frequency compensation and a fixed
frequency oscillator.
A standard series of inductors optimized for use with
„ Applications
z Simple High-efficiency step-down regulator
z Efficient pre-regulator for linear regulators
z Positive to negative converter(Buck-Boost)
the OCP2576 are available from several different
manufacturers. This feature greatly simplifiers the
design of switch-mode power supplies.
Others features include a guaranteed ±4% tolerance
on output within specified input voltages and output
load conditions, and ±10% on the oscillator
frequency. External shutdown in 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.
„ Pin Configuration
(1) TO220-5L
(Top View)
Metal Tab Gnd
5 SD
4 FB
3 GND
2 OUTPUT
1 VIN
Symbol
1
2
3
4
5
Name
Vin
Output
Gnd
FB
SD
Descriptions
Operating Voltage Input
Switching Output
Ground
Output Voltage Feedback Control
ON/OFF Shutdown
(2) TO263-5L
(Top View)
5 SD
4 FB
3 GND
2 OUTPUT
1 VIN
Metal Tab Gnd
Page1-9
Rev. 1.3 Mar. 02, 2006




OCP2576 pdf, 반도체, 판매, 대치품
OCP2576
Simple Switch 3A Step-down Voltage Regulator
„ Electrical Characteristics (Continued)
Specifications with standard type face are for TJ=25, System Parameters (Note 3)
Symbol
OCP2576-ADJ
OCP2576-3.3V
OCP2576-5V
OCP2576-12V
OCP2576-15V
VFB
η
VOUT
η
VOUT
η
VOUT
η
VOUT
η
Parameter
Feedback
Voltage
Efficiency
Output voltage
Efficiency
Output voltage
Efficiency
Output voltage
Efficiency
Output voltage
Efficiency
Conditions
8VVIN36V
0.5AILOAD3A
VOUT=5V
VIN =12V,
ILOAD =3A ,VOUT=5V
6VVIN36V
0.5AILOAD3A
VIN =12V, ILOAD =3A
8VVIN36V
0.5AILOAD3A
VIN =12V, ILOAD =3A
15VVIN36V
0.5AILOAD3A
VIN =15V, ILOAD =3A
18VVIN36V
0.5AILOAD3A
VIN =18V, ILOAD =3A
Min.
(Note 2)
1.193
Typ.
1.230
Max.
(Note 2)
1.267
Unit
V
77 %
3.168 3.3 3.432
V
75 %
4.800
5.0
5.20
V
77 %
11.520 12 12.480 V
88 %
14.400 15 15.600 V
88 %
Note 1: Absolute Maximum Ratings indicates limits beyound which damage to the device may occur. Operating
Ratings indicate conditions for which the device is intended to be functional, but specific performance is not
guaranteed. For guarabted spcifications and the best conditions, see the Electrical Characteristics.
Note 2: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face).
All room temperature limits at 100% production tested. All limits at temperature extremes are guaeanteed via
correlating using standard Statistical Quality Control (SQC) methods.
Note 3: External components such as the catch diode, inductor, input and output capacitors, and voltage programing
resistors can affect switching regulator system performance.
Note 4: Output pin sourcing current. No diode, inductor or capacitor connected to output pin.
Note 5: Feedback pin removed from output and connected to 0 V.
Note 6: Feedback pin removed from output and connected to +12V for the 3.3V, 5V, and the ADJ. version, and +25V
for the 12V and 15V version, to force the output transistir switch OFF.
Note 7: VIN=36V.
Note 8: Junction to ambient theraml resistance (no external heat sink) for the 5 lead TO220 package mounted
verticallly, with 1/2 inch leads in a socket, or on a PC board with minimum cooper area.
Note 9: Junction to ambient thermal resistance ( no extermal heat sink) for the 5 lead TO200 pckage mounted
vertically, with 1/4 inch leads soldered to a PC board contaning approximately 4 square inches of copper area
surrounding the leads.
Note 10: If the TO263-5L package is used, the thermal resistance can be reduced by increasing the PC board copper
area hermally to the package. Using 0.5 square inches of copper area θJA=50/W, with 1 square inch of copper area,
θJA=37/W, and with 1.6 or more square inches of cooper area θJA=32/W.
Note 11: The oscillator frequency reduces to approximately 11KHz in the event of an output short or an overload
which causes the regulated output voltage to drop approximately 40% from the nominal output voltage. The self-
protection feature lowers the average power dissipation of the minimum duty cycle from 5% to approximately 2%.
Page4-9
Rev. 1.3 Mar. 02, 2006

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OCP2576 전자부품, 판매, 대치품
OCP2576
Simple Switch 3A Step-down Voltage Regulator
„ Ordering Information
OCP2576XXXX
Package:
T: TO220-5L
K: TO263-5L
Output Voltage: Packing:
Temperature Grade:
Blank: ADJ
Blank: Tube or Bluk E: -40~125
33: 3.3V
A: Tape & Reel
50: 5.0V
12: 12V
15: 15V
„ Marking Information
1) TO220-5L
2) TO263-5L
2576-VV
YYWWXX
Logo
Part Number
2576-ADJ: ADJ
2576-33: 3.3V
2576-50: 5.0V
2576-12: 12V
2576-15: 15V
Internal Code
Date Code:
YY: Year (01=2001)
WW: Nth week (01~52)
2576-VV
YYWWXX
Logo
Part Number
2576-ADJ: ADJ
2576-33: 3.3V
2576-50: 5.0V
2576-12: 12V
2576-15: 15V
Internal Code
Date Code:
YY: Year (01=2001)
WW: Nth week (01~52)
Page7-9
Rev. 1.3 Mar. 02, 2006

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OCP2576

Simple Switch 3A Step-down Voltage Regulator

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