AME
AME5269
n
Electrical Specifications
V
IN
= 12V, T
A
= 25
O
C, 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
Current Limit Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time
Input Undervoltage Lockout
Input Undervoltage Lockout
Hysteresis
Soft-Start Current Source
Soft-Start Period
EN Lockout Threshold Voltage
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysteresis
EN Lockout Hysteresis
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
8
2A, 28V, 340KHz Synchronous
Rectified Step-Down Converter
Symbol
I
SHDN
Test Condition
V
EN
= 0V
V
EN
= 2.0V, V
FB
= 1.0V
4.75V
≦V
IN
≦28V
Min
Typ
1
1.3
Max
3.0
1.5
0.95
Units
µA
mA
V
V
V/V
µA/V
mΩ
mΩ
V
FB
A
EA
G
EA
R
DS,ON,HI
R
DS,ON,LO
I
SW,LK
0.9
0.925
1.10
400
∆IC
= ±10µA
800
135
105
V
EN
= 0V, V
SW
= 0V
Minimum Duty Cycle
From Drain to Source
10
2.4
1.1
5.2
µA
A
A
A/V
G
CS
f
OSC,CL
f
OSC,SCR
D
MAX
t
ON,MIN
V
UVLO
V
UVLO,HYST
I
SS
t
SS
V
EN
V
SS
= 0V
C
SS
= 0.1µF
T
A
= 25
O
C
-40
O
C≦T
A
≦+85
O
C
V
EN
Rising
2.2
2.2
1.1
V
IN
rising, T
A
= 25
O
C
-40
O
C≦T
A
≦+85
O
C
3.8
3.5
T
A
= 25
O
C
-40
O
C≦T
A
≦+85
O
C
V
FB
= 0V
V
FB
= 0.8V
300
270
340
380
400
KHz
KHz
KHz
%
nS
116
90
220
4.05
4.3
4.7
210
6
15
2.5
2.7
2.7
1.56
210
210
2
V
V
mV
µA
mS
V
V
V
mV
mV
O
OTP
OTH
Shutdown, temperature
increasing
Restore, temperature
decreasing
160
20
C
C
O
Rev. A.01
AME [ ANALOG MICROELECTRONICS ]
