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

Diodes Incorporated AP1602AYL-7

Name: AP1602AYL-7
Brand: Diodes Incorporated
SKU: AP1602AYL-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP1602AYL-7

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-89-5/6

Datasheet:: AP1602AYL-7.pdf

Description:: IC REG BOOST 3.3V 800MA SOT89-5

Quantity:: RFQ Add To RFQ list

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Inventory:1,509

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Product details

Overview

AP1602AYL-7 from Anachip Corp. is a PFM-controlled step-up DC/DC converter optimized for single- or dual-cell NiMH battery systems, delivering a fixed 3.3 V output with start-up from ≤0.9 V, 90% peak efficiency at 200 mA load, and ultra-low 16 µA operating current. It integrates N- and P-channel power MOSFETs, precision 1.2 V reference, and shutdown control in SOT89-5L package for space-constrained portable instrumentation.

For engineers reviewing the AP1602AYL-7 datasheet, AP1602AYL-7 pinout, AP1602AYL-7 application, or AP1602AYL-7 equivalent, key selection criteria include guaranteed sub-0.9 V start-up under 1 mA load, PFM operation up to 100 kHz, internal R_DS(ON) of 0.3–0.6 Ω, ±1.5% output voltage accuracy (3.17–3.43 V), and SOT89-5L thermal performance in battery-powered microphones and pagers.

Technical Context

The AP1602AYL-7 implements pulse frequency modulation with constant on-time (~7 µs) and variable off-time (0.8–1.2 µs), enabling high light-load efficiency and low quiescent current. Its error amplifier compares feedback against a trimmed 1.2 V reference, while zero-crossing detection and current-limit amplification ensure stable discontinuous conduction mode operation across 1.1–5.5 V input range.

Internal power switches-N- and P-channel MOSFETs with combined R_DS(ON) ≤0.6 Ω-drive the LX node directly; REF requires 0.1 µF bypass, and SHDN accepts logic-level control referenced to V_OUT, not V_IN. No external compensation is needed due to integrated loop stability design.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3 V (±3.5% over temp & line: 3.17–3.43 V)
Start-Up Voltage	≤0.9 V at 1 mA load - enables operation from near-dead NiMH cells
Peak Efficiency	90% at V_IN=2.4 V, I_OUT=200 mA - minimizes battery drain in portable gear
Quiescent Current	16 µA typical into OUT - extends shelf life in always-on backup supplies
Switching Frequency	Up to 100 kHz (PFM modulated) - allows compact 22 µH inductor and low-ESR output cap
R_DS(ON)	0.3–0.6 Ω total (N+P FETs) - reduces conduction loss below 220 mA output
Shutdown Current	0.1–1 µA - preserves battery during standby in wireless mics and organizers

Pinout & Package

SOT89-5L package: 5-pin thermally enhanced surface-mount outline with exposed pad (pin 2 = GND), 4.5 mm × 4.15 mm footprint, 1.6 mm height, and recommended land pattern per Anachip spec.

Pin/Terminal	Circuit Role	Design Meaning
1 (REF)	Reference voltage output	1.2 V ±2%, requires 0.1 µF ceramic bypass to GND for stability
2 (GND)	Power and signal ground	Common return for IC core, LX switch, and thermal pad - must be low-impedance
3 (SHDN)	Enable/disable control input	Active-high logic: >0.8×V_OUT = ON; <0.2×V_OUT = shutdown (0.1–1 µA leakage)
4 (LX)	Switch node	Drain connection of internal N/P MOSFETs - connects to inductor and Schottky diode anode
5 (OUT)	Regulated power output	3.3 V supply rail; provides bootstrap power to IC and drives 220 µF output capacitor

Key Features

Feature	Design Value
Sub-0.9 V start-up capability	Enables reliable boot from depleted 1-cell NiMH (0.9 V typ., 1.1 V max) without external diode assist
Integrated dual-MOSFET switch	N- and P-channel devices co-located on die reduce layout parasitics and eliminate external gate drivers
PFM control with fixed t_ON	7 µs on-time ensures consistent energy transfer per cycle, improving light-load regulation vs. PWM
No external compensation required	Internally compensated error amplifier simplifies BOM and eliminates tuning risk in production
Low-noise, low-ripple output	Optimized switching waveform and internal current limiting reduce EMI and enable direct use in analog sensor rails

Applications

Pagers

Wireless Microphones

Use Scenario: Ultra-low-power receive-and-alert operation with intermittent RF bursts and long sleep intervals.

IC Role / Device Role / Timing Role: Primary 3.3 V system rail generator from single NiMH cell, managing wake-up sequencing and RF LNA bias.

Use Value: 16 µA quiescent current extends battery life beyond 6 months; sub-0.9 V start-up prevents brownout during cold-start after storage.

Use Scenario: Compact handheld mic with analog condenser capsule, op-amp preamp, and UHF transmitter.

IC Role / Device Role / Timing Role: Fixed 3.3 V supply for microphone bias, preamp rails, and transmitter VCO tuning voltage.

Use Value: Low output ripple (<10 mV_pp) avoids audible noise coupling; SOT89-5L footprint fits sub-15 mm PCB width.

Electronic Cameras

Battery Backup Supplies

Use Scenario: Flash memory card interface and LCD backlight driver in digital still cameras powered by AA/AAA cells.

IC Role / Device Role / Timing Role: Step-up regulator for 3.3 V I/O and memory interface, decoupled from main 5 V rail.

Use Value: 90% efficiency at 200 mA sustains burst write performance; PFM mode suppresses switching noise near image sensor analog front-end.

Use Scenario: Real-time clock (RTC) and SRAM retention during main power failure in industrial controllers.

IC Role / Device Role / Timing Role: Standby DC/DC converter maintaining 3.3 V rail from coin cell or supercapacitor during AC loss.

Use Value: 0.1 µA shutdown current enables >10-year backup life; REF pin allows precise RTC voltage monitoring.

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
TPS61022DRVR	Higher 0.65 V start-up; 94% efficiency; requires external compensation; 2 MHz fixed-frequency PWM	Better suited for higher-current, noise-insensitive loads (e.g., LED drivers); less optimal for ultra-low-I_Q battery backup	Select if >300 mA output or tighter output regulation needed; avoid if sub-0.9 V start-up is mandatory
MAX1706BETA+	0.7 V start-up; 88% efficiency; 1.25 V reference; no integrated P-FET; requires external Schottky	Lower BOM cost in high-volume pager designs; higher no-load current (25 µA) limits shelf-life use	Prefer for cost-sensitive, non-critical backup rails where 0.7 V start-up suffices and layout area allows discrete diode

Compared with TPS61022DRVR and MAX1706BETA+, AP1602AYL-7 uniquely delivers guaranteed ≤0.9 V start-up with monolithic dual-FET integration and lowest quiescent current (16 µA), making it irreplaceable in long-life, single-cell NiMH applications like pocket organizers and legacy pagers where minimal external components are critical.

Availability

AP1602AYL-7 is available at Aetrix Electronics and suitable for pagers, wireless microphones, and portable instruments requiring stable component supply with lead-free compliance and long-lifecycle support.

Supply support for AP1602AYL-7 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

Anachip Corp. is a Taiwan-based fabless semiconductor company founded in 1997, specializing in analog and mixed-signal power management ICs for portable and battery-operated equipment.

The AP1602 series belongs to Anachip's ultra-low-voltage DC/DC converter product line, designed specifically to extend runtime in space-constrained, single-cell NiMH/NiCd applications where start-up reliability below 1 V is essential.

FAQ

What is the minimum input voltage required for AP1602AYL-7 to regulate 3.3 V output?

The AP1602AYL-7 guarantees start-up from ≤0.9 V at 1 mA load and maintains regulation down to 1.1 V input across temperature. Below 1.1 V, output voltage drops linearly with input; operation below 0.9 V is not functional. The datasheet specifies this with and without an external Schottky diode assist.

Can AP1602AYL-7 drive a 300 mA load continuously?

No - the AP1602AYL-7 is rated for 220 mA steady-state output current at 3.3 V. Attempting 300 mA causes thermal foldback or output droop due to internal current limit (0.4–0.65 A switch limit) and R_DS(ON)-related heating. For >250 mA, consider TPS61022 or discrete boost solutions.

Is the SOT89-5L package thermally adequate for continuous 200 mA operation?

Yes - the SOT89-5L package features an exposed thermal pad (pin 2 = GND) and achieves ~120°C/W junction-to-ambient in standard 2-layer FR4 with 1-in² copper pour. At 200 mA and 90% efficiency, power dissipation is ~75 mW, resulting in ~9°C rise - well within the -40°C to +80°C operating range.

Does AP1602AYL-7 require an external feedback resistor divider?

No - AP1602AYL-7 delivers a fixed 3.3 V output and contains no FB pin in its A-version configuration (per pinout: AP1602A uses REF/OUT/LX/GND/SHDN). The B-version has FB but A-version is internally trimmed; external resistors are unnecessary and would disrupt regulation.

AP1602AYL-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-89-5/6

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Step-Up

Output Configuration:: Positive

Topology:: Boost

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 1.1V

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 3.3V

Voltage - Output (Max):: -

Current - Output:: 800mA (Switch)

Frequency - Switching:: 100kHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 80°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-5

AP1602AYL-7 FAQ

1.How can I place an order for AP1602AYL-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP1602AYL-7 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 AP1602AYL-7 reliable?

The price and inventory of AP1602AYL-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1602AYL-7 is usually 5 days.

3.What payment methods are accepted for AP1602AYL-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1602AYL-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP1602AYL-7?

AP1602AYL-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP1602AYL-7 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 AP1602AYL-7?

For technical support, including AP1602AYL-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1602AYL-7 requirements.

6.How does Aetrix verify that AP1602AYL-7 is sourced from the original manufacturer or authorized distributors?

All AP1602AYL-7 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 AP1602AYL-7 meets industry standards.

7.What is the process for return or replacement of AP1602AYL-7?

All AP1602AYL-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1602AYL-7, 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 AP1602AYL-7 part is unused and in its original packaging.

Return procedure for AP1602AYL-7:

1.Submit a request within 90 days.

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

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