MP1482 Datasheet, PDF (3/12 Pages) Monolithic Power Systems – 2A, 18V Synchronous Rectified Step-Down Converter

MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
V_IN = 12V, T_A = +25°C, unless otherwise noted.
Parameter
Shutdown Supply Current
Supply Current
Feedback Voltage
Feedback Overvoltage Threshold
Error Amplifier Voltage Gain ⁽⁵⁾
Error Amplifier Transconductance
High-Side Switch On Resistance ⁽⁵⁾
Low-Side Switch On Resistance ⁽⁵⁾
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 ⁽⁵⁾
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 ⁽⁵⁾
Symbol Condition
V_EN = 0V
V_EN = 2.0V; V_FB = 1.0V
V_FB 4.75V  V_IN  18V
A_EA
G_EA
R_DS(ON)1
R_DS(ON)2
I_C = 10μA
V_EN = 0V, V_SW = 0V
Minimum Duty Cycle
From Drain to Source
GCS
F_osc1
F_osc2
D_MAX
V_FB = 0V
V_FB = 1.0V
V_EN Rising
V_IN Rising
V_SS = 0V
C_SS = 0.1μF
Note:
5) Guaranteed by design, not tested.
Min
0.900
2.4
305
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
375
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
MP1482 Rev. 1.31
www.MonolithicPower.com
3
7/9/2012
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