AP1605 Datasheet, PDF (1/7 Pages) Anachip Corp – PWM/PFM Dual-mode Step-Down Switching Regulator

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 and Green Package: SOP-8L
• Lead Free Finish/RoHS Compliant (Note 1)
Applications
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.
• 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
AP1605 X X X
Package Lead-Free
Packing
S : SOP-8L L : Lead-Free - U : Tube
G : Green
-13 : Taping
Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
(Note 2)
AP1605S
Package
Code
S
Packaging
SOP-8L
Tube
Quantity Part Number
Suffix
100
-U
13” Tape and Reel
Quantity
Part Number
Suffix
2500/Tape & Reel
-13
Note: 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. 1
1 of 7
www.diodes.com
JANUARY 2007
© Diodes Incorporated