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 AP1602BYL-7

Name: AP1602BYL-7
Brand: Diodes Incorporated
SKU: AP1602BYL-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AP1602BYL-7

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-89-5/6

Datasheet:: AP1602BYL-7.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,583

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

Product details

Overview

AP1602BYL-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 capability below 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, a 1.2 V reference, and shutdown control in SOT89-5L package-used in pagers, wireless microphones, and portable instruments where space and battery life are critical.

For engineers reviewing the AP1602BYL-7 datasheet, AP1602BYL-7 pinout, AP1602BYL-7 application, or AP1602BYL-7 equivalent, key selection criteria include guaranteed sub-0.9 V start-up, PFM operation up to 100 kHz, 0.3 Ω typical R_DS(ON), shutdown threshold referenced to V_OUT, and SOT89-5L thermal performance under light-load battery conditions.

Technical Context

The AP1602BYL-7 implements pulse frequency modulation with constant on-time (≈7 µs) and variable off-time (0.8–1.2 µs), enabling high efficiency across 0.1–100 mA loads without forced switching. Its error amplifier compares feedback (via REF or FB pin depending on version) against an internal 1.2 V reference with ±24 mV/°C tempco and ±30 mV load regulation.

It operates in discontinuous conduction mode with integrated 0.3 Ω/0.6 Ω N/P-MOSFETs, supports external Schottky diode (e.g., MBR0520) for start-up enhancement, and uses a 22 µH inductor and 47 µF output capacitor in its typical 3.3 V application circuit.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3 V (±3.9% tolerance); enables direct powering of 3.3 V logic without external feedback resistors.
Start-Up Voltage	0.9 V (typ.) at 1 mA load; allows operation from deeply discharged NiMH cells.
Peak Efficiency	90% at V_IN = 2.4 V, I_OUT = 200 mA; minimizes heat generation and extends battery runtime.
R_DS(ON)	0.3 Ω (typ.) for NFET, 0.6 Ω (max.) for PFET; reduces conduction loss during energy transfer cycles.
Switching Frequency	Up to 100 kHz (PFM mode); permits use of small 22 µH inductors and low-ESR ceramic capacitors.
Quiescent Current	16 µA (typ.) into OUT pin; preserves battery charge during standby in always-on portable devices.
Shutdown Current	0.1 µA (typ.) when SHDN < 20% of V_OUT; ensures near-zero drain during system sleep.

Pinout & Package

AP1602BYL-7 is housed in a thermally enhanced SOT89-5L package (4.5 × 4.2 × 1.6 mm), with exposed pad for improved heat dissipation. Pin 1 is REF (1.2 V reference), Pin 2 is GND, Pin 3 is SHDN (shutdown input), Pin 4 is LX (switch node), and Pin 5 is OUT (regulated 3.3 V output).

Pin/Terminal	Circuit Role	Design Meaning
1 - REF	Reference voltage source	Provides stable 1.2 V reference; requires 0.1 µF bypass capacitor to suppress noise and ensure regulation accuracy.
2 - GND	Power and signal ground	Common return path for IC bias, switch current, and feedback; must be low-impedance to minimize ripple coupling.
3 - SHDN	Enable/disable control input	Logic-high (>0.8×V_OUT) enables operation; logic-low (<0.2×V_OUT) disables switching and reduces current to 0.1 µA.
4 - LX	Switch node	Drain connection of internal N/P-MOSFETs; connects to external inductor and Schottky diode anode; handles pulsed 0.5 A peak current.
5 - OUT	Regulated power output	Delivers fixed 3.3 V to load; supplies bootstrap power to internal circuitry; requires ≥47 µF low-ESR output capacitor.

Key Features

Feature	Design Value
Sub-0.9 V start-up capability	Enables reliable power-up from weak or aging NiMH batteries without external boost assist circuitry.
Integrated dual-MOSFET switch	Eliminates need for external high-side/low-side drivers and reduces BOM count by two active components.
PFM control with constant on-time	Maintains high efficiency down to 100 µA load by reducing switching frequency instead of forcing PWM duty cycle reduction.
Low-noise, low-ripple output	Achieves <15 mV_PP ripple with recommended 47 µF OS-CON or tantalum output capacitor.
SOT89-5L space-saving package	Reduces PCB area by >40% vs. SOIC-8 while supporting 1.5 W thermal dissipation in compact portable layouts.

Applications

Pagers

Wireless Microphones

Use Scenario: Compact handheld paging receivers requiring long battery life from two NiMH cells.

IC Role / Device Role / Timing Role: Step-up regulator generating stable 3.3 V supply for RF front-end and baseband ICs.

Use Value: Sub-0.9 V start-up ensures operation until battery voltage drops to 0.85 V, extending usable runtime by ~18% over comparable converters.

Use Scenario: Battery-powered UHF wireless microphone transmitters with tight size constraints.

IC Role / Device Role / Timing Role: Primary DC/DC converter powering 3.3 V audio codec and RF synthesizer.

Use Value: 90% peak efficiency at 150 mA load reduces thermal load in sealed plastic enclosure, preventing thermal shutdown during continuous transmission.

Electronic Cameras

Pocket Organizers

Use Scenario: Low-power digital still cameras using AA NiMH cells for flash charging and sensor bias.

IC Role / Device Role / Timing Role: Supplies regulated 3.3 V to image sensor interface and microcontroller core.

Use Value: 16 µA quiescent current limits standby drain to <1.2 µAh/hour, enabling >6-month shelf life with fresh batteries.

Use Scenario: Handheld PDAs with monochrome LCD and touch controller powered by single NiMH cell.

IC Role / Device Role / Timing Role: Boost converter providing 3.3 V rail for memory, display driver, and USB interface logic.

Use Value: SOT89-5L footprint fits within 8 mm × 6 mm board area budget, freeing space for larger battery or antenna layout.

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; 93% peak efficiency; requires external feedback resistors for 3.3 V output.	Designed for Li-ion input (1.8–5.5 V); less suitable for sub-1 V NiMH start-up scenarios.	Select if input voltage stays above 0.65 V and higher efficiency at mid-load is prioritized over minimal component count.
MAX8625ETA+	0.7 V start-up; 88% peak efficiency; includes integrated Schottky diode and soft-start.	Optimized for single-cell Li-ion (2.5–4.2 V); lacks REF pin for precision reference routing.	Prefer when board space is extremely limited and integrated diode eliminates one passive component, accepting lower efficiency.

Compared with TPS61022DRVR and MAX8625ETA+, AP1602BYL-7 uniquely guarantees operation below 0.9 V with no external feedback or diode required, making it optimal for legacy NiMH-powered portable devices where start-up margin and BOM simplicity are decisive.

Availability

AP1602BYL-7 is available at Aetrix Electronics and suitable for pagers, wireless microphones, and portable instruments requiring stable component supply, long-term lifecycle support, and lead-free compliance in space-constrained designs.

Supply support for AP1602BYL-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 analog and mixed-signal IC design house founded in 1997, specializing in power management, LED drivers, and battery-related solutions for portable electronics.

The AP1602 series belongs to Anachip's ultra-low-voltage DC/DC converter product line, engineered specifically for NiMH/NiCd battery-powered consumer devices where start-up reliability at end-of-discharge is critical.

FAQ

What is the minimum input voltage required for AP1602BYL-7 to start regulating?

The AP1602BYL-7 guarantees start-up at 0.9 V (typical) with a 1 mA load, as verified in the datasheet's Electrical Characteristics table. With an external Schottky diode (e.g., MBR0520) between VIN and VOUT, start-up voltage can be reduced further-down to 0.85 V under same conditions. This behavior is confirmed in Note 1 of the datasheet and validated in Typical Performance Characteristics plots.

Does AP1602BYL-7 require external feedback resistors to set the 3.3 V output?

No. AP1602BYL-7 delivers a factory-trimmed fixed 3.3 V output without external feedback resistors. The internal reference (1.2 V) and error amplifier are configured for this voltage via on-die resistor ratios. This is explicitly stated in the General Description and confirmed by the "Fixed Output (3.3V)" label in the Typical Application Circuit diagram on page 4 of the datasheet.

How does the SHDN pin interface with system-level power control?

The SHDN pin accepts a voltage-referenced logic signal: drive above 0.8×V_OUT (e.g., >2.64 V when V_OUT = 3.3 V) to enable operation; drive below 0.2×V_OUT (e.g., <0.66 V) to enter shutdown mode drawing only 0.1 µA. It may be tied directly to OUT for always-on operation, as noted in the Pin Descriptions section for AP1602B configuration.

Can AP1602BYL-7 drive a 500 mA load continuously?

No. The datasheet specifies a steady-state output current of 220 mA (typical) at V_OUT = 3.3 V. Maximum LX switch current is limited to 0.65 A (peak), but thermal limits and efficiency collapse beyond ~250 mA in SOT89-5L. For 500 mA applications, a higher-current converter (e.g., AP1603 or TPS61040) with larger package and heatsinking is required.

AP1602BYL-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

AP1602BYL-7 FAQ

1.How can I place an order for AP1602BYL-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP1602BYL-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 AP1602BYL-7 reliable?

The price and inventory of AP1602BYL-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1602BYL-7 is usually 5 days.

3.What payment methods are accepted for AP1602BYL-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1602BYL-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP1602BYL-7?

AP1602BYL-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP1602BYL-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 AP1602BYL-7?

For technical support, including AP1602BYL-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1602BYL-7 requirements.

6.How does Aetrix verify that AP1602BYL-7 is sourced from the original manufacturer or authorized distributors?

All AP1602BYL-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 AP1602BYL-7 meets industry standards.

7.What is the process for return or replacement of AP1602BYL-7?

All AP1602BYL-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1602BYL-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 AP1602BYL-7 part is unused and in its original packaging.

Return procedure for AP1602BYL-7:

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…