Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Diodes Incorporated AP1609SG-13

Name: AP1609SG-13
Brand: Diodes Incorporated
SKU: AP1609SG-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP1609SG-13

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AP1609SG-13.pdf

Description:: IC REG BOOST ADJ 2.4A 8SOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,882

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AP1609SG-13 from Diodes Incorporated is a PWM/PFM dual-mode step-up DC/DC converter with integrated 100 mΩ N-channel MOSFET, 300 kHz ±20% oscillator, 2.5–6 V input range, and programmable 3.0–17 V output (±2.5%). It delivers up to 2.4 A switching current and achieves 91% typical efficiency in portable audio and cellular phone power supplies.

For engineers reviewing the AP1609SG-13 datasheet, AP1609SG-13 pinout, AP1609SG-13 application, or AP1609SG-13 equivalent, key selection criteria include its PFM-to-PWM load-adaptive control, 1 µA standby current, SOP-8L package thermal performance, and FB-based output voltage programming using external resistors.

Technical Context

The AP1609SG-13 implements a current-mode PWM/PFM hybrid controller with internal ramp generation and comparator-based duty-cycle regulation. Its feedback loop references a precise 1.23 V ±3% internal bandgap, enabling stable output voltage setpoints across temperature and line variations.

It features dual ground pins (GND and PGND) for signal/power separation, dedicated LX switch nodes (pins 5 & 6) rated for −0.3 to 18 V and ±0.2 A peak current, and CE-controlled shutdown with 0.2×VCC disable threshold and 0.65×VCC enable threshold.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5–6 V: Supports single-cell Li-ion, dual-cell alkaline, or USB-powered systems without external LDO pre-regulation.
Output Voltage Range	3.0–17 V ±2.5%: Programmable via FB resistor divider; enables direct powering of white LEDs, LCD bias, or RF modules.
Oscillator Frequency	300 kHz ±20%: Balances EMI suppression and external component size-supports compact 10 µH inductors and low-ESR ceramics.
Switching Current Limit	2.4 A: Enables ≥1 W output at 5 V with minimal external components; defined by internal MOSFET R_DS(on) ≤100 mΩ.
Standby Current	1 µA (typ.): Achieved via CE pin assertion; critical for battery runtime extension in always-on subsystems.
Efficiency	91% (typ. at 5 V out, 500 mA): Measured under light-to-moderate loads; reflects combined conduction and switching loss optimization.
Feedback Reference	1.23 V ±3%: Internal precision reference enables <1% output error when using 1% FB resistors.

Pinout & Package

SOP-8L (Small Outline Package, 8-lead, gull-wing), lead-free and RoHS-compliant, with exposed thermal pad not connected internally. Dual GND pins (7, 8) and separate PGND (4) support clean power routing and noise isolation.

Pin/Terminal	Circuit Role	Design Meaning
CE (Pin 1)	Chip Enable control input	Active-high logic interface; asserts shutdown mode below 0.2×VCC, enabling ultra-low quiescent operation.
Vcc (Pin 2)	IC bias supply	Powers internal logic, reference, and gate driver; decoupling required within 5 mm of pin.
FB (Pin 3)	Output voltage sense feedback	Connects to resistor divider midpoint; regulates output by comparing to 1.23 V reference.
PGND (Pin 4)	Power ground return	Low-impedance return path for MOSFET source and LX node; must be routed separately from signal GND.
LX (Pins 5 & 6)	Switch node outputs	Drives external inductor/diode; high di/dt node requiring minimized trace area and short loop paths.
GND (Pins 7 & 8)	Signal ground reference	Reference for CE, FB, and internal circuitry; connects to system signal ground plane.

Key Features

Feature	Design Value
PWM/PFM dual-mode operation	Automatically transitions from PFM (light load, >15% duty) to PWM (heavy load, up to 80% max duty) to maintain >85% efficiency across 0.1–100% load range.
Integrated 100 mΩ N-MOSFET	Eliminates need for external high-side switch; reduces BOM count and PCB area while limiting conduction loss to <250 mW at 2 A.
Separate PGND and GND pins	Enables clean separation of high-current power return and sensitive analog/signal ground, reducing noise coupling into FB and CE paths.
Programmable output voltage	Uses standard 1.23 V reference and external resistor divider (R1/R2); supports fixed or dynamically adjusted outputs via DAC-driven FB network.
Thermal shutdown protection	Activates at T_J ≥150 °C; latches off until junction cools to ~130 °C, preventing sustained overtemperature operation.

Applications

Portable Audio Systems

Cellular and Portable Phones

Use Scenario: Powering Class D amplifier rails and LCD backlight drivers in Bluetooth speakers and headphone amplifiers.

IC Role / Device Role / Timing Role: Primary boost converter generating 9–12 V from 3.7 V Li-ion battery; regulated via FB pin with 1% resistors.

Use Value: Delivers 91% efficiency at 500 mA load, extending playback time by >18% versus fixed-frequency-only alternatives.

Use Scenario: Supplying 5 V USB OTG power and 13.5 V camera flash LED driver from single-cell battery.

IC Role / Device Role / Timing Role: Dual-output capable boost stage (with external diode steering) supporting simultaneous rail generation.

Use Value: 300 kHz switching allows use of 10 µH inductor and 22 µF ceramic output cap-reducing solution footprint by 35% vs. 1 MHz designs.

Electronic Information Organizers

Palmtops

Use Scenario: Generating stable 3.3 V and 5 V rails for microcontroller and peripheral ICs in handheld PDAs.

IC Role / Device Role / Timing Role: Main system power regulator with CE-controlled sleep mode during display-off periods.

Use Value: 1 µA shutdown current extends battery shelf life to >12 months in storage without periodic recharge.

Use Scenario: Providing adjustable 7–15 V bias for touchscreen controller and memory card interface in legacy palmtop platforms.

IC Role / Device Role / Timing Role: Programmable boost converter with external R1/R2 setting output to match legacy IC requirements.

Use Value: ±2.5% output tolerance ensures reliable operation of analog front-end circuits without post-regulation LDOs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-up DC/DC converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PAM2423	Higher 2.2 MHz switching frequency; lower 0.5 µA shutdown current; no PFM mode; requires external MOSFET.	Better suited for space-constrained designs needing smaller inductors; lacks adaptive efficiency optimization at light loads.	Select when board area is critical and load profile is predominantly medium-to-heavy; avoid if battery runtime at standby is primary concern.
MT3608	Fixed 1.2 MHz frequency; 2 A switch current; no CE pin; 1.25 V FB reference; higher 250 µA quiescent current.	Lower cost but less flexible; unsuitable for CE-gated power sequencing or ultra-low-I_Q systems.	Choose for cost-sensitive consumer electronics where standby current >10 µA is acceptable and programmability is not required.

Compared with PAM2423 and MT3608, the AP1609SG-13 uniquely combines integrated MOSFET, PFM/PWM adaptability, and sub-µA shutdown-making it optimal for battery-powered devices requiring both runtime and flexibility, despite its obsolete status and need for design migration planning.

Availability

AP1609SG-13 is available at Aetrix Electronics and suitable for portable audio systems, cellular and portable phones, and electronic information organizers requiring stable component supply during legacy design support and end-of-life transition phases.

Supply support for AP1609SG-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP1609 belongs to Diodes' DC/DC converter product line, designed specifically for high-efficiency, low-noise boost conversion in battery-powered portable electronics with stringent size and quiescent current constraints.

FAQ

What is the maximum recommended output current for AP1609SG-13?

The AP1609SG-13 supports up to 2.4 A switching current, but practical output current depends on input voltage, output voltage, and thermal conditions. At V_IN = 3.3 V and V_OUT = 5 V, continuous output current is typically 1.2–1.5 A with 2-layer PCB and 1-in² copper pour. Derating is required above 60 °C ambient.

Can AP1609SG-13 operate with an input voltage below 2.5 V?

No. The absolute minimum input voltage is 2.5 V per datasheet specifications. Operation below this level risks failure to start, unstable regulation, or excessive dropout-especially under load. For sub-2.5 V inputs, consider Diodes' AP3418 or AP6320x series, which support down to 0.9 V.

Is the SOP-8L package thermally enhanced?

The SOP-8L package used for AP1609SG-13 has no internal thermal pad or exposed die attach paddle. Thermal performance relies on copper area under pins 4 (PGND), 7–8 (GND), and proper PCB layout per AP02001 land pattern. Junction-to-ambient θ_JA is 120 °C/W on 2-layer FR-4 with 1-in² 2 oz copper.

Why does AP1609SG-13 have two LX pins and two GND pins?

Pins 5 and 6 are electrically tied internally as a single LX node to handle high peak currents (up to 2.4 A) with reduced trace inductance and voltage overshoot. Pins 7 and 8 are signal GND returns, while Pin 4 is dedicated PGND-separating high-di/dt power return from sensitive analog reference paths to minimize noise coupling into FB and CE.

AP1609SG-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Step-Up

Output Configuration:: Positive

Topology:: Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2.5V

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 3V

Voltage - Output (Max):: 17V

Current - Output:: 2.4A (Switch)

Frequency - Switching:: 300kHz

Synchronous Rectifier:: No

Operating Temperature:: -20°C ~ 80°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOP

AP1609SG-13 FAQ

1.How can I place an order for AP1609SG-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP1609SG-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AP1609SG-13 reliable?

The price and inventory of AP1609SG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1609SG-13 is usually 5 days.

3.What payment methods are accepted for AP1609SG-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1609SG-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP1609SG-13?

AP1609SG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP1609SG-13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AP1609SG-13?

For technical support, including AP1609SG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1609SG-13 requirements.

6.How does Aetrix verify that AP1609SG-13 is sourced from the original manufacturer or authorized distributors?

All AP1609SG-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP1609SG-13 meets industry standards.

7.What is the process for return or replacement of AP1609SG-13?

All AP1609SG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1609SG-13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AP1609SG-13 part is unused and in its original packaging.

Return procedure for AP1609SG-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…