AP1605_09 Datasheet, PDF (1/8 Pages) Diodes Incorporated – PWM/PFM DUAL-MODE STEP-DOWN SWITCHING

Features
AP1605
PWM/PFM DUAL-MODE STEP-DOWN SWITCHING
REGULATOR
General Description
• Low current consumption:
In operation: 100µA max.
Power off: 2µA max.
• Input voltage: 2.5V to 7V
Adjustable version (+2.5%)
• PWM/PFM dual Mode
• Oscillation frequency: 300KHz (Typ.)
• With a power-off function.
• Built-in internal SW P-channel MOS
• Lead Free package: SOP-8L
• SOP-8L: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
AP1605 consists of CMOS step-down switching regulator with
PWM/PFM dual mode control. These devices include a reference
voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AP1605 provides low-ripple power, high efficiency, and excellent
transient characteristics. The PWM/PFM control circuit is able to
vary the duty ratio linearly 0%~0.25% (PFM) and 25%~100%
(PWM).
With the addition of an internal P-channel Power MOS, a coil,
capacitors, and a diode connected externally, these ICs can function
as step-down switching regulators. They serve as ideal power
supply units for portable devices when coupled with the SOP-8L
mini-package, providing such outstanding features as low current
consumption. Since this converter can accommodate an input
voltage of up to 7V, it is also ideal when operating via an AC
adapter.
Applications
• On-board power supply of battery
devices for portable telephones,
electronic notebooks, PDA, and other
hand-held sets
• Power supplies for audio equipment,
including portable CD players and
headphone stereo equipment
• Fixed voltage power supply for cameras,
video equipment and communications
equipment
• Power supplies for microcomputers.
• Conversion from four Ni-H or Ni-Cd cells or
two lithium-ion cells to 3.3V/3V
• Conversion of AC adapter input to 5V/3V
Ordering Information
AP 1605 S X - 13
Package
S : SOP-8L
Lead Free
L : Lead Free
G : Green
Packing
13 : Tape & Reel
Device
AP1605SL-13
Lead-free
AP1605SG-13
Package
Code
S
S
Packaging
(Note 2)
SOP-8L
SOP-8L
13” Tape and Reel
Quantity
Part Number Suffix
2500/Tape & Reel
-13
2500/Tape & Reel
-13
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AP1605 Rev. 2
1 of 8
www.diodes.com
FEBRUARY 2009
© Diodes Incorporated