AME5269 Datasheet, PDF (8/18 Pages) Analog Microelectronics – 2A, 28V, 340KHz Synchronous Rectified Step-Down Converter

AME
AME5269
n Electrical Specifications
V_IN = 12V, T_A = 25^OC, unless otherwise noted.
Parameter
Shutdown Current
Supply Current
Feedback Voltage
OVP Threshold Voltage
Error Amplifier Voltage Gain
Error Amplifier Transconductance
High-side Switch On Resistance
Low-side Switch On Resistance
Switch Leakage Current
High-side Switch Current Limit
Low-side Switch Current Limit
COMP to Current Sense
Transconductance
Symbol
I_SHDN
V_FB
A_EA
G_EA
R_DS,ON,HI
R_DS,ON,LO
I_SW,LK
G_{C S}
Current Limit Oscillation Frequency f_OSC,CL
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time
f_OSC,SCR
D_MAX
t_ON,MIN
Input Undervoltage Lockout
V_UVLO
Input Undervoltage Lockout
Hysteresis
Soft-Start Current Source
Soft-Start Period
V_UVLO,HYST
I_SS
t_SS
EN Lockout Threshold Voltage
V_EN
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysteresis
EN Lockout Hysteresis
Thermal Shutdown Temperature
OTP
Thermal Shutdown Hysteresis
8
OTH
2A, 28V, 340KHz Synchronous
Rectified Step-Down Converter
Test Condition
V_EN = 0V
V_EN = 2.0V, V_FB = 1.0V
4.75V V_IN 28V
∆IC = ±10µA
V_EN = 0V, V_SW = 0V
Minimum Duty Cycle
From Drain to Source
T_A = 25^OC
-40^OC T_A +85^OC
V_FB = 0V
V_FB = 0.8V
V_IN rising, T_A = 25^OC
-40^OC T_A +85^OC
V_SS = 0V
C_SS = 0.1µF
T_A = 25^OC
-40^OC T_A +85^OC
V_EN Rising
Shutdown, temperature
increasing
Restore, temperature
decreasing
Min Typ Max Units
1
3.0 µA
1.3
1.5 mA
0.9 0.925 0.95 V
1.10
V
400
V/V
800
µA/V
135
mΩ
105
mΩ
10
µA
2.4
A
1.1
A
5.2
A/V
300 340 380 KHz
270
400 KHz
116
KHz
90
%
220
nS
3.8 4.05
4.3
V
3.5
4.7
V
210
mV
6
µA
15
mS
2.2
2.5
2.7
V
2.2
2.7
V
1.1 1.56
2
V
210
mV
210
mV
160
O_C
20
O_C
Rev. B.01