Diodes AUR9719 - Manual (Page 5)

Data Sheet
1.5MHz, 2A, STEP DOWN DC-DC CONVERTER AUR9719
Nov. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
5
Electrical Characteristics
V
IN_SW
=V
IN_A
=V
EN
=5V, V
OUT
=1.2V, V
FB
=0.8V, L=3.3µH, C
IN
=4.7µF, C
OUT
=22µF, T
A
=25°C, unless otherwise
specified.
Parameter Symbol Test Condition Min Typ Max Unit
Input Voltage Range V
IN
V
IN
=V
IN_SW
=V
IN_A
2.7 5.5 V
Shutdown Current I
OFF
V
EN
=0V 4 µA
Active Current I
ON
V
FB
=0.95V 460 µA
Regulated Feedback
Voltage
V
FB
For Adjustable Output Voltage 0.784 0.8 0.816 V
Regulated Output
Voltage Accuracy ∆V
OUT
/V
OUT
V
IN
=2.7V to 5.5V, I
OUT
=10mA to
2A
-3 3 %
Peak Inductor
Current
I
PK
2.2 3.2 A
Oscillator Frequency f
OSC
1.2 1.5 1.8 MHz
PMOSFET R
ON
R
ON(P)
I
SW
=0.75A 100 m Ω
NMOSFET R
ON
R
ON(N)
I
SW
=0.75A 100 m Ω
EN Input High
Threshold Voltage
V
EN_H
1.5 V
EN Input Low
Threshold Voltage
V
EN_L
0.4 V
EN Input Current I
EN
2 µA
Soft-start Time t
SS
450 µs
Maximum Duty
Cycle
D
MAX
90 %
Rising 2.4
Falling 2.3
Under Voltage Lock
Out Threshold
V
UVLO
Hysteresis 0.1
V
Thermal Shutdown T
SD
Hysteresis=30°C 150 °C