AME5297 Datasheet, PDF (6/14 Pages) Analog Microelectronics – Step-Down DC/DC Converter

AME
AME5297
3A, 18V, 500KHz Synchronous
Step-Down DC/DC Converter
n Electrical Specifications
V_IN=12V, unless otherwise noted. Typical values are at T_A=25^oC.
Parameter
Supply Shutdown Current
Supply Current
Hihg Side Switch On-Resistance
Symbol
I_IN
I_Q
R_DS(ON)1
Test Condition
V_EN=0V
V_EN=2V, V_FB=1V, V_SS=3V
V_BST-SW=5V
Low Side Switch On-Resistance
Load Side Switch Leakage
Current
Switch Current Limit
Oscillator Frequency
Fold-back Frequency
Maximum Duty Cycle
Feedback Voltage
Feedback Current
EN Rising Threshold
EN Falling Threshold
R_RDS(ON)2
SW _LKG
f_OSC
f_FB
D_MAX
V_FB
I_FB
V_{EN_RISING}
V_{EN_FALLING}
EN Input Current
I_EN
EN Turn Off Delay
Input Under Voltage Lockout
Threshold
Input Under Voltage Lockout
Hysteresis
V_CC Regulator
V_CC Load Regulation
Soft-Start Current
Thermal Shutdown
Thermal Hysteresis
EN_TD-OFF
V_UVLO
∆V_UVLO
V_CC
I_SS
T_SD
V_CC=5V
V_EN=0V, V_SW=12V
V_FB=0.75V
V_FB<400mV
V_FB=700mV
T_A=25^oC
V_FB=800mV
V_EN=2V
V_EN=0V
I_CC=5mA
Min Typ Max Units
0.1
µA
0.7
mA
80
mΩ
30
mΩ
0.15
µA
4.2
5
A
440 500 580 KHz
0.25
f_SW
90
95
%
-2% 800 2% mV
10
50 nA
1.2 1.4 1.6 V
1.1 1.25 1.4 V
2
µA
0
µA
8
µs
3.6
V
650
mV
5
V
3
%
11
µA
150
o_C
20
o_C
6
Rev. A.05