ap3409 BCD Semiconductor Manufacturing Limited, ap3409 Datasheet - Page 6

• Manufacturer Part Number: ap3409
• Description: 3a, 4mhz High Efficiency Synchronous Buck Converter
• Manufacturer: BCD Semiconductor Manufacturing Limited

Electrical Characteristics (Continued)
V
Jul. 2010 Rev. 1. 0
3A, 4MHz High Efficiency Synchronous Buck Converter
Parameters
OSCILLATOR SECTION
RT Pin Voltage
Switching Frequency
Maximum Duty Cycle
POWER SWITCH SECTION
Switch Current Limit
Internal
Resistance
Internal
Resistance
SHDN/RT SECTION
Shutdown Threshold
TOTAL DEVICE
Output Current
Output
Regulation
Output
Regulation
Soft-start Time
Thermal
Temperature
Thermal
Temperature Hysteresis
IN
=V
DD
=V
Voltage
Voltage
PVDD
N-FET
P-FET
=3.3V, T
Shutdown
Shutdown
Load
Line
On
On
A
=25℃, unless otherwise specified.
Symbol
R
R
T
D
I
LNR
LOD
T
I
V
f
NDSON
LIMIT
PDSON
T
OTSD
OUT
OSC
MAX
HYS
RT
SS
R
ADJ Frequency
V
V
I
I
V
V
V
I
I
I
SW
SW
OUT
OUT
OUT
OSC
FB
FB
DD
OUT
DD
Conditions
=500mA
=-500mA
=0.75V
=0.75V
=2.6 to 5.5V
=2.7 to 5.5V
=100mA
=0.01 to 3A
＝10mA
=330kΩ
=2.5V
6
Min
0.76
100
0.8
0.3
3.2
BCD Semiconductor Manufacturing Limited
3
Preliminary Datasheet
V
Typ
DD
0.11
0.11
±0.2
4.2
160
0.8
0.4
1.5
20
1
-0.7
V
Max
DD
0.16
0.17
0.84
1.2
4
-0.4
AP3409
Unit
MHz
MHz
%/V
ms
ºC
ºC
Ω
Ω
%
%
A
V
A
V