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MP1482 Datasheet(PDF) 2 Page - Guangdong Kexin Industrial Co.,Ltd

Part # MP1482
Description  2A, 18V Synchronous Rectified Step-Down Converter
PDF  4 Pages
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Manufacturer  KEXIN [Guangdong Kexin Industrial Co.,Ltd]
Direct Link  http://www.kexin.com.cn/index.asp
Logo KEXIN - Guangdong Kexin Industrial Co.,Ltd

MP1482 Datasheet(HTML) 2 Page - Guangdong Kexin Industrial Co.,Ltd

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Parameter
Symbol Condition
Min
Typ
Max
Units
Shutdown Supply Current
VEN = 0V
1
3.0
µA
Supply Current
VEN = 2.0V; VFB = 1.0V
1.3
1.5
mA
Feedback Voltage
VFB
4.75V
≤ VIN ≤ 18V
0.900
0.923
0.946
V
Feedback Overvoltage Threshold
1.1
V
Error Amplifier Voltage Gain
(4)
AEA
400
V/V
Error Amplifier Transconductance
GEA
∆IC = ±10µA
800
µA/V
High-Side Switch On Resistance
(4)
RDS(ON)1
130
mΩ
Low-Side Switch On Resistance
(4)
RDS(ON)2
130
mΩ
High-Side Switch Leakage Current
VEN = 0V, VSW = 0V
10
µA
Upper Switch Current Limit
Minimum Duty Cycle
2.4
3.4
A
Lower Switch Current Limit
From Drain to Source
1.1
A
COMP to Current Sense
Transconductance
GCS
3.5
A/V
Oscillation Frequency
Fosc1
340
KHz
Short Circuit Oscillation Frequency
Fosc2
VFB = 0V
100
KHz
Maximum Duty Cycle
DMAX
VFB = 1.0V
90
%
Minimum On Time
(4)
220
ns
EN Shutdown Threshold Voltage
VEN Rising
1.1
1.5
2.0
V
EN Shutdown Threshold Voltage
Hysteresis
210
mV
EN Lockout Threshold Voltage
2.2
2.5
2.7
V
EN Lockout Hysterisis
210
mV
Input Under Voltage Lockout
Threshold
VIN Rising
3.80
4.10
4.40
V
Input Under Voltage Lockout
Threshold Hysteresis
210
mV
Soft-Start Current
VSS = 0V
6
µA
Soft-Start Period
CSS = 0.1µF
15
ms
Thermal Shutdown
(1)
160
°C
Note:
1) Guaranteed by design, not tested.
www.kexin.com.cn
2
INPUT
OUTPUT
3.3V
2A
C3
3.3nF
10nF
MP1482
BS
IN
FB
SW
SS
GND
COMP
EN
1
2
3
5
6
4
8
7
100
95
90
85
80
75
70
65
60
55
50
0
1.0
2.0
2.5
1.5
0.5
LOAD CURRENT (A)
Efficiency vs
Load Current
VOUT = 3.3V
VOUT = 2.5V



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