Preliminary datasheet, Electrical characteristics, Parameters symbol conditions min typ max unit – Diodes AP3422 User Manual
Page 5
Preliminary Datasheet
Dual 1.1MHz, 800mA Synchronous DC-DC Buck Converter AP3422
Feb. 2013 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
5
Electrical Characteristics
V
IN1
=V
IN2
=V
EN1
=V
EN2
=3.6V, T
A
=25
℃
, unless otherwise specified. Specifications with boldface type apply over
full operating temperature range from -40 to 85ºC.
Parameters Symbol
Conditions
Min
Typ
Max
Unit
Supply Current on Each
Converter
I
CC
V
FB
=0.55V
400
600
µA
Shutdown Supply Current
on Each Converter
I
SHDN
V
EN
=0V, V
IN
=5.5V 0.01 1
µA
Under Voltage Lockout
Threshold
V
UVLO
Rising Edge
2.27
V
Under Voltage Lockout
Hysteresis
V
HUVLO
200
mV
Feedback Bias Current
I
FB
V
FB
=0.65V -50
0.5
50
nA
Feedback Voltage
V
FB
I
OUT
=100mA
0.588/
0.582
0.600
0.612/
0.618
V
Maximum Output Current
I
OUT (MAX)
V
IN
=2.5V,
V
OUT
=0.9V
800
mA
V
IN
=3.6V,
V
OUT
=1.2V
800
V
IN
=4.6V,
V
OUT
=3.3V
800
Switch Current Limit
I
LIM
V
FB
=0.55V 0.95
1.25
A
Oscillator Frequency
f
OSC
0.8 1.1 1.4 MHz
EN Pin Threshold
V
ENL
0.6
V
V
ENH
1.5
EN Pin Input Leakage
Current
I
H
V
EN
=3.6V -0.1
0.1
µA
I
L
V
EN
=0V -0.1
0.1
µA
Internal PFET On
Resistance
R
DSONP
I
SW
=100mA
0.44
Ω
Internal NFET On
Resistance
R
DSONN
I
SW
=-100mA
0.29
Ω
Maximum Duty Cycle
D
MAX
V
FB
=0.55V
100
%
Soft-start Time
T
SS
V
EN
=0V to V
IN
I
OUT
＝
50mA
220
µs
Thermal Shutdown
Threshold
T
OTSD
160
ºC
Thermal Shutdown
Hysteresis
T
HYS
30
ºC