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參數(shù)資料
| 型號(hào)： | LSP3121D12E |
| 廠商： | LITE-ON SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PSSO5 |
| 封裝： | TO-252, 5 PIN |
| 文件頁數(shù)： | 3/8頁 |
| 文件大小： | 142K |
| 代理商： | LSP3121D12E |
Liteon Semiconductor Corporation
LSP3121
52KHZ 3A PWM Buck DC/DC Converter
Rev1.1
3/8
ELECTRICAL CHARACTERISTICS (ALL OUTPUT VOLTAGE VERSIONS)
Unless otherwise specified, VIN=12V for 3.3V,5V, adjustable version and VIN=24V for the 12V version. ILOAD=0.5A
Symbol
Paramrter
Conditions
Min.
Typ.
Max.
Unit
50
IB
Feedback bias current
VFB=1.3V(Adjustable
version only)
40
100
nA
44
52
60
FOSC
Oscillator frequency
38
66
KHz
VSAT
Saturation voltage
IOUT=3A
no outside circuit
VFB=0V force driver on
1.4
1.8
V
Max.Duty Cycle(ON)
VFB=0V force driver on
100
DC
Min.Duty Cycle(OFF)
VFB=12V force driver off
0
%
ICL
Current limit
Peak current
no outside circuit
VFB=0V force driver on
5.8
A
Output=0
no outside circuit
VFB=12V force driver off
2
mA
IL
Output=-1
Output
leakage
current
VIN=40V
30
mA
IQ
Quiescent Current
VFB=12V force driver off
5
10
mA
ISTBY
Standby Quiesient
Current
ON/OFF Pin=5V
VIN=40V
80
200
A
VIL
Low(regultaor ON)
0.8
VIH
ON/OFF pin logic input
threshold voltage
High(regultaor OFF)
2.4
1.4
V
IH
ON/OFF pin logic input
current
VLOGIC=2.5V(OFF)
30
IL
ON/OFF pin input
current
VLOGIC=0.5V(ON)
10
A
θJC
Thermal Resistence
TO252-5L
Junction
to case
10
/W
θJA
Thermal Resistence
With copper area of
approximately 3 in
2
TO252-5L
Junction
to ambient
30
/W
ELECTRICAL CHARACTERISTICS (CONTINUED)
Symbol
Parameter
Conditions
Typ.
Limit
Unit
VFB
Output Feedback
4.5V≤VIN≤40V
0.2A≤ILOAD≤3A
VOUT programmed for
3V
1.23
1.193/1.18
1.267/1.28
V
VMIN
VMAX
LSP3121-ADJ
η
Efficiency
VIN =12V, ILOAD =3A
72
%
VOUT
Output voltage
5V≤VIN≤40V
0.2A≤ILOAD≤3A
3.3
3.168/3.135
3.432/3.465
V
VMIN
VMAX
LSP3121-3.3V
η
Efficiency
VIN =12V, ILOAD =3A
72
%
VOUT
Output voltage
7V≤VIN≤40V
0.2A≤ILOAD≤3A
5
4.8/4.75
5.2/5.25
V
VMIN
VMAX
LSP3121-5V
η
Efficiency
VIN =12V, ILOAD =3A
79
%
VOUT
Output voltage
15V≤VIN≤40V
0.2A≤ILOAD≤3A
12
11.52/11.4
12.48/12.6
V
VMIN
VMAX
LSP3121-12V
η
Efficiency
VIN =15V, ILOAD =3A
90
%
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