Manual

AP1605
PWM/PFM DUAL-MODE STEP-DOWN SWITCHING
REGULATOR
AP1605 Rev. 2 4 of 8 FEBRUARY 2009
www.diodes.com © Diodes Incorporated
Electrical Characteristics (VIN = 5V, T
A
= 25°C, unless otherwise specified)
Symbol Parameter Conditions Min. Typ. Max. Unit
V
IN
Input Voltage AP1605 Series 2.5 -- 7 V
V
REF
Internal Reference Voltage 1.1625 1.2 1.2375 V
V
UVLO
UVLO Voltage Voltage required to maintain V
OUT
-- -- 2.2 V
MAXDTY Maximum Duty Ratio 100 -- -- %
PFMDTY PFM Duty Ratio 15 25 35 %
I
SW
Switch Current Duty = 50% 3 -- -- A
I
SS
Current Consumption
POWER
ON
V
OUT
= 2.5V -- 35 100 µA
I
SSS
Current Consumption
During Power Off
V
ON/OFF
= 0V -- -- 2 µA
∆V
OUT1
Line Regulation 2.5V~7V @ I
OUT
= 0.1A -- 0.2 0.5 %
∆V
OUT2
Load Regulation 0.1A~3A -- 1 1.5 %
F
OSC
Oscillation Frequency 220 300 380 KHz
V
CEH
CE Pin “High” Voltage Evaluate oscillation at SW pin 0.65 -- --
*Vcc
V
CEL
CE Pin “Low” Voltage
Evaluate oscillation stop at SW
pin
-- -- 0.2
I
SH
Power-Off Pin Input
Leakage Current
-- -0.1 -- 0.1 µA
I
SL
-- -0.1 -- 0.1 µA
EFFI Efficiency V
IN
= 5V, V
OUT
= 2.5V I
OUT
= 1A -- 93 -- %