Diodes AP1534 - Manual (Page 3)

AP1534
PWM CONTROL 2A STEP-DOWN CONVERTER
AP1534
Document number: DS31314 Rev. 6 - 2
3 of 9
www.diodes.com
April 2011
© Diodes Incorporated
Recommended Operating Conditions
Symbol Parameter Min Max Unit
V
IN
Input Voltage 3.6 18 V
I
OUT
Output Current 0 2 A
T
A
Operating Ambient Temperature -20 85
o
C
Electrical Characteristics (V
IN
= 12V, T
A
= 25
°C, unless otherwise specified)
Symbol Parameter Conditions Min Typ. Max Unit
V
FB
Feedback Voltage I
OUT
= 0.1A 0.784 0.8 0.816 V
I
FB
Feedback Bias Current I
OUT
= 0.1A - 0.1 0.5 µA
I
SW
Switch Current -- 2.0 - - A
I
SHDN
Current Consumption During Power Off V
EN
= 0V - 10 - µA
∆V
OUT
/ V
IN
Line Regulation V
IN
= 5V~18V - 1 2 %
∆V
OUT
/V
OUT
Load Regulation I
OUT
= 0.1 to 2A - 0.2 0.5 %
f
OSC
Oscillation Frequency Measure waveform at SW pin 240 300 400 KHz
f
OSC1
Frequency of Current Limit or Short Circuit
Protect
Measure waveform at SW pin - 50 - KHz
V
IH
EN Pin Input Voltage
Evaluate oscillation at SW pin 2.0 - -
V
V
IL
Evaluate oscillation stop at SW pin - - 0.8
I
SH
EN Pin Input Leakage Current
-- - 20 - µA
I
SL
-- - -10 - µA
I
OCSET
OCSET Pin Bias Current -- 75 90 105 µA
R
DS(ON)
Internal MOSFET R
DS(ON)
V
IN
= 5V, V
FB
= 0V - 160 -
m Ω
V
IN
= 12V, V
FB
= 0V - 100 -
EFFI Efficiency V
IN
= 12V, V
OUT
= 5V, I
OUT
= 2A - 91 - %
T
SHDN
Thermal shutdown threshold - 150 - °C
T
HYS
Thermal shutdown hysteresis - 55 - °C
θ
JA
Thermal Resistance Junction-to-Ambient SO-8 (Note 3) - 127 - o C/W
θ
JC
Thermal Resistance Junction-to-Case SO-8 (Note 3) - 28 -
o
C/W
Notes: 3. Test condition for SO-8: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
For better thermal performance, larger copper pad for heatsink is needed.