Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SOT26

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AP1603 (Obsolete)

Step-up DC-DC converter

Datasheet

Evaluation Boards and User Guides

AP1603-EVM-User-Guide.pdf (172 KB)

Contact Sales

Description

The AP1603 is a high efficiency step-up DC/DC converter for applications using as few as a single NiMH or Li-Ion battery cells. Only four external components are required to deliver a fixed output voltage of 3.3V. The AP1603 starts up from less than 0.9V input with 1mA load. Pulse Frequency Modulation scheme brings optimized performance for applications with light output loading and low input voltages. The output ripple and noise are lower compared with the circuits operating in PSM mode. The PFM control circuit operating in 150KHz (max.) switching rate results in smaller passive components. The space saving SOT26 packages make the AP1603 an ideal choice of DC/DC converter for space conscious applications, like pagers, electronic cameras, and wireless microphones.

Feature(s)

A Guaranteed Start-Up from less than 0.9 V
High Efficiency
Low Quiescent Current
Less Number of External Components needed
Low Ripple and Low Noise
Space Saving Lead Free Package: SOT26
Lead Free Finish/RoHS Compliant

Application(s)

Pagers
Cameras
Wireless Microphones
Pocket Organizers
Battery Backup Suppliers
Portable Instruments

Specifications & Technical Documents

Product Parameters

MinimumInput Voltage (V)	0.9 V
MaximumInput Voltage (V)	5.5 V
Minimum Output Voltage (V)	2 V
Maximum Output Voltage (V)	5.5 V
LS RDS(ON) (mΩ)	600 mΩ
Quiescent Current Typ (μA)	0.016 mA
Shutdown Current Typ (µA)	0.07 µA
Type	Boost
Output Current (A)	0.2 A
Frequency Typ (Hz)	150K Hz
Efficiency (%)	90 %

Technical Documents

Application Notes

ANP_AP1603.pdf (1.3 MB)

Evaluation Boards and User Guides

AP1603-EVM-User-Guide.pdf (172 KB)

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
PCN-2672	2024-03-11	2024-09-07	Device End of Life (EOL)
PCN-2654	2024-02-15	2024-04-28	Device End of Life (EOL)