YOUDA INTEGRATED CIRCUIT
YD2576
SIMPLE SWITCHER 3A STEP-DOWN VOLTAGE
REGULATOR--YD2576
DESCRIPTION
The YD2576 series of regulators are monolithic integrated ciruits that provide all the active functions for a
step-dpwn(buck) switching egulator,capable of driving 3A load with excellent line and regulation.
FEATURES
*Guaranteed 3A output current
*Requires only 4 external components
*52kHz fixed frequency internal oscillator
*High efficiency
*thermal shutdown and current limit protection
BLOCK DIAGRAM
R1=2.2K,R2=6.8K.
WuXi YouDa Electronics Co., Ltd
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
Tel: 86-510-85205117 86-510-85205106 Fax: 86-510-85205110 Website: www.e-youda.com
SHENZHEN OFFICE Tel 86-755-83740369 Fax 86-755-83741418
Ver 5.0 1 of 3 2006-7-10
YOUDA INTEGRATED CIRCUIT
YD2576
ABSOLUTE MAXIMUM RATINGS
(Tamb=25)
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
45
V
Power Dissipation
P
D
15 W
Operating Temperature
Topr
-25 to +75
Storage Temperature
Tstg
-65 to +150
ELECTRICAL CHARACTERISTICS
(Vcc=12V,Tamb=25,Unless otherwise specified)
Parameter
Symbol Test
Condition Min.
Typ.
Max. Unit
Output
Voltage Vout
Iload=0.5A 4.9 5 5.1 V
0.5AIload3A
4.8
5
5.2
V
Output Voltage
Vout
8VVin40V
4.75
5
5.25
V
Efficiency
Iload=3A
77
Tj=25
52
kHz
Tj=0to+125
47
58
kHz
Osillator Frequency
Fosc
Tj=-40to+125
42
63
kHz
Tj=25
1.5
1.8
V
Saturation Voltage
Vsat
Tj=-40to+125
2
V
Max Duty Cycle
DC
94
98
Tj=25
4.2
5.8
6.9
A
Current Limit
IcL
Tj=-40to+125
3.5
7.5
A
Tj=25
0.8
2
mA
Output Leakage
IL
Tj=-40to+125
6
20
mA
Tj=25
5
9
mA
Quniescent Current
Iq
Tj=-40to+125
11
mA
Standby Quniescent
Current
Istby
Pin5=5V
50
200
uA
Standby Threshold
V
STB
2
V
WuXi YouDa Electronics Co., Ltd 2 of 3 Website: www.e-youda.com
PDF 
ZIP