Preliminary datasheet, Electrical characteristics – Diodes AP3203 User Manual
Page 5

Preliminary Datasheet
380kHz, 3A Asynchronous DC - DC Buck Converter AP3203
Mar. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
5
Electrical Characteristics
V
IN
=V
EN
=12V, V
OUT
=3.3V, T
A
=25
o
C, unless otherwise specified. And those in boldface type apply over
the full operating temperature rang (T
A
=-40ºC to +85ºC).
Parameter Symbol
Conditions
Min
Typ
Max
Unit
Input Voltage
V
IN
4.75 18 V
Quiescent Current
I
Q
V
EN
=2V,
V
FB
=1.35V
1.0
1.5
mA
Shutdown Supply Current
I
SHDN
V
EN
=0V
1
10
µA
Feedback Voltage
V
FB
1.185
1.222 1.258 V
Feedback Over Voltage
Threshold
V
FBOV
1.48
V
Feedback SCP Voltage Threshold
V
FB_SCP
0.6
V
Feedback Bias Current
I
FB
V
FB
= 1V
-0.1
0.1
µA
Upper Switch On-resistance
R
DSONH
I
SW
=0.5A
0.12
Ω
Lower Switch On-resistance
R
DSONL
I
SW
=0.05A
10
Ω
High-side Switch Leakage
Current
I
LEAKH
V
IN
=18V, V
EN
=0V
V
SW
=0V
0.1
10
µA
High-side Switch Current Limit
I
LIMH
4 5.2
A
Low-side Switch Current Limit
I
LIML
From Drain to
Source
0.15 A
V
ENH
1.5
V
EN Pin Threshold
V
ENL
0.5 V
EN Pull-up Current
I
EN_PH
V
EN
=0V
1.0
µA
Input UVLO Threshold
V
UVLO
V
IN
Rising
3.55
3.85
4.15
V
Input UVLO Hysteresis
V
HYS
0.3
V
Oscillator Frequency
f
OSC1
380 kHz
Short Circuit Oscillator
Frequency
f
OSC2
80
kHz
Maximum Duty Cycle
D
MAX
V
FB
=1.0V
90
%
Minimum Duty Cycle
D
MIN
V
FB
=1.35V
0
%
Error Amplifier Voltage Gain (Note 3)
A
EA
400
V/V
Error Amplifier Transconductance
G
EA
700
950
1200
µA/V
COMP to Current Sense
Transconductance
G
CS
5.4
A/V
Thermal Shutdown (Note 3)
T
OTSD
160
ºC
Thermal Shutdown Hysteresis (Note
3)
T
HYS
30
ºC
Soft-start Time (Note 3)
t
SS
C4=0.1
µF,
I
OUT
=500mA
10 ms
Soft-start Current
I
SS
6
µA