Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SO-8

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AP1609 (Obsolete)

PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER

Datasheet

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Description

The AP1609 is a high efficient step-up DC/DC converter. Large output current is possible having a built in internal N channel MOSFET, and using an external coil and diode. Output voltage is programmable with 1.23V of standard voltage supply internal, and using externally connected components, output voltage (FB) can be set up at will. With a 300KHz switching frequency, the size of the external components can be reduced. Control switches from PFM to PWM during light loads with the AP1609 (PWM/PFM switchable) and the series are highly efficient from light loads to large output currents. During stand-by time (CE pin “Low”), current consumption is reduced to 1µA.

Feature(s)

Input Voltage Range: 2.5~6V

Output Voltage Range: 3.0~17V (±2.5%)

PWM/PFM Switching Control

Oscillator Frequency: 300KHz (±20%)

High Efficiency: 91% (Typ.)

Stand-by Current: I_STB 1 = μA (Typ.)

Built-in internal N-Channel MOS

Lead Free Package: SO-8

SOP-8L: Available in “Green” Molding Compound (No Br, Sb)

Lead Free Finish/ RoHS Compliant

Application(s)

Electronic Information Organizers

Palmtops

Cellular and Portable Phones

Portable Audio Systems

Various Multi-Function Power Supplies

Specifications & Technical Documents

Product Parameters

Efficiency (%)	91
Frequency Typ (Hz)	300K
HS RDS(ON) (mΩ)	N/A
LS RDS(ON) (mΩ)	100
MaximumInput Voltage (V)	6
Maximum Output Voltage (V)	17
MinimumInput Voltage (V)	2.5
Minimum Output Voltage (V)	3
Output Current (A)	2.4
Quiescent Current Typ (μA)	0.08
Shutdown Current Typ (µA)	1
Type	Boost

Technical Documents

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

RoHSFile

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products