參數(shù)資料
型號(hào)： LSP5502SAC
廠商： LITE-ON SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 470 kHz SWITCHING FREQ-MAX, PDSO8
封裝： SOP-8
文件頁(yè)數(shù)： 4/11頁(yè)
文件大小： 275K
代理商： LSP5502SAC
LSP5502
2A Synchronous Step Down DC/DC Converter
2/11
Rev. 1.7
www.liteon-semi.com
ABSOLUTE MAXIMUM RATINGS
Parameter
Value
Unit
IN Supply Voltage
-0.3 to 30
V
SW Voltage
-1 to VIN + 0.3
V
BS Voltage
VSW – 0.3 to VSW + 6
V
EN, FB, COMP Voltage
-0.3 to 6
V
Continuous SW Current
Internally limited
A
Junction to Ambient Thermal Resistance (θJA)
(Test on Approximately 3 in
2 Copper Area 1OZ copper FR4 board)
70
°C/W
Junction to Ambient Case Resistance (θJC)
20
°C/W
Maximum Power Dissipation
0.76
W
Operating Temperature
-20 to 85
°C
Storage Temperature
-55 to 150
°C
Lead Temperature (Soldering, 10 sec)
300
°C
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long
periods may affect device reliability.)
Recommended Operating Conditions
Symbol
Parameter
Min
Max
Unit
VIN
Input Voltage
4.5
27
V
TJ
Operating Junction Temperature Range
-20
125
oC
ELECTRICAL CHARACTERISTICS
(VIN = 12V, TA= 25°C unless otherwise specified.)
Parameter
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Input Operating Voltage
VIN
VOUT = 1.0V, ILOAD = 0A to 2A
4.5
27
V
Input Holdup Voltage
VOUT = 1.0V, ILOAD = 0A to 2A
4.5
V
Feedback Voltage
VFB
4.5V ≤ VIN ≤ 20V
0.900
0.925
0.950
V
Feedback Overvoltage Threshold
1.1
V
High-Side Switch-On Resistance
120
m
Low-Side Switch-On Resistance
120
m
High-Side Switch Leakage
VEN = 0V, VSW = 0V
9
10
A
Upper Switch Current Limit
3.5
4.0
A
Lower Switch Current Limit
0.9
A
COMP to Current Limit
Transconductance
GCOMP
5.2
A/V
Error Amplifier Transconductance
GEA
ICOMP = ±10A
800
A/V
Error Amplifier DC Gain
AVEA
480
V/V
Switching Frequency
fSW
350
400
470
kHz
Short Circuit Switching Frequency
VFB = 0
150
kHz
Maximum Duty Cycle
DMAX
VFB = 0.8V
90
%
Minimum On Time
220
nS
EN Shutdown Threshold Voltage
VEN Rising
1.1
1.3
1.5
V
EN Shutdown Threshold Voltage
Hysterisis
200
mV
EN Lockout Threshold Voltage
2.2
2.5
2.7
V
EN Lockout Hysterisis
210
mV
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