User Manual

AP1609
PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER
AP1609 Rev. 2 4 of 9 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Electrical Characteristics
AP1609 ( F
OSC
= 300kHz, V
OUT
= 5V ) T
A
= 25
o
C
Symbol Parameter Conditions Min Typ. Max Units
V
FB
FB Voltage 1.20 1.23 1.26 V
V
CC
Input Voltage 2.5 - 6 V
V
OUT
Output Voltage 3.0 - 17 V
I
OUT
Maximum Switching Output
Current
2.4 - - A
R
DS (ON)
Drain-Source On-State
Resistance
I
D
= 2.4A - 100 - mΩ
I
CCQ
Quiescent Current No Load, FB = 2V, CE = High - 80 130 μA
I
SD
Shutdown Current No Load, CE = Low - 1 - μA
Fosc Oscillator Frequency
Measuring of EXT Waveform,
V
IN
= Output Voltage +0.3V
240 300 360 kHz
MAXDTY Maximum Duty Ratio 80 - - %
PFMDTY PFM Duty Ratio No Load 15 25 35 %
V
CEH
CE “High” Voltage
No External Components,
V
FB
= 0V,
Apply 0.65V
CC
(min.) to CE,
Chip Enable
0.65 - - *V
CC
V
CEL
CE “Low” Voltage Same as V
CEH
, Chip Disable - - 0.20 *V
CC
EFFI Efficiency - 91 - %