MP1482 Просмотр технического описания (PDF) - KEXIN Industrial
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MP1482 Datasheet PDF : 4 Pages
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SMD Type
Integrate Circuit
MP1482
■ Electrical Characteristics (Ta = 25℃, VIN=12V,unless otherwise specified)
Parameter
Shutdown Supply Current
Supply Current
Feedback Voltage
Feedback Overvoltage Threshold
Error Amplifier Voltage Gain (4)
Error Amplifier Transconductance
High-Side Switch On Resistance (4)
Low-Side Switch On Resistance (4)
High-Side Switch Leakage Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense
Transconductance
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time (4)
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysteresis
EN Lockout Threshold Voltage
EN Lockout Hysterisis
Input Under Voltage Lockout
Threshold
Input Under Voltage Lockout
Threshold Hysteresis
Soft-Start Current
Soft-Start Period
Thermal Shutdown (1)
Note:
1) Guaranteed by design, not tested.
Symbol Condition
VEN = 0V
VEN = 2.0V; VFB = 1.0V
VFB 4.75V ≤ VIN ≤ 18V
AEA
GEA ∆IC = ±10µA
RDS(ON)1
RDS(ON)2
VEN = 0V, VSW = 0V
Minimum Duty Cycle
From Drain to Source
GCS
Fosc1
Fosc2
DMAX
VFB = 0V
VFB = 1.0V
VEN Rising
VIN Rising
VSS = 0V
CSS = 0.1µF
Min
0.900
2.4
1.1
2.2
3.80
Typ
1
1.3
0.923
1.1
400
800
130
130
3.4
1.1
3.5
340
100
90
220
1.5
210
2.5
210
4.10
210
6
15
160
Max
3.0
1.5
0.946
10
2.0
2.7
4.40
Units
µA
mA
V
V
V/V
µA/V
mΩ
mΩ
µA
A
A
A/V
KHz
KHz
%
ns
V
mV
V
mV
V
mV
µA
ms
°C
■ Typlacl Characteristics
INPUT
10nF
2
1
7
IN
EN
BS 3
SW
MP1482
8 SS
FB 5
GND
COMP
4
6
C3
3.3nF
OUTPUT
3.3V
2A
Efficiency vs
Load Current
100
95
VOUT = 3.3V
90
85
VOUT = 2.5V
80
75
70
65
60
55
50
0 0.5 1.0 1.5 2.0 2.5
LOAD CURRENT (A)
2
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