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Diodes Incorporated AP1604AWL-7
- Part No.:
- AP1604AWL-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP1604AWL-7.pdf
- Description:
- IC REG BUCK ADJ 800MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,747
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Product details
Overview
AP1604AWL-7 from Diodes Incorporated is a dual-mode (PWM/PFM) step-down DC/DC converter in SOT25 package, delivering up to 800mA output current with external coil/diode/capacitor, 600kHz typical switching frequency, 1.0V internal reference (±2.5% VOUT accuracy), and 93% peak efficiency at 5V input/3.3V@300mA output. It serves as primary voltage regulator in portable battery-powered systems requiring light-load efficiency and compact footprint.
For engineers reviewing the AP1604AWL-7 datasheet, AP1604AWL-7 pinout, AP1604AWL-7 application, or AP1604AWL-7 equivalent, key selection criteria include its 2.2–5.5V input range, 2µA standby current, CE/SS-controlled soft-start and shutdown, PFM mode for sub-10mA loads, and FB-based adjustable output voltage configuration.
Technical Context
The AP1604AWL-7 integrates a PWM/PFM hybrid controller with internal 1.0V reference and ramp generator, enabling automatic mode transition based on load current. Its error amplifier compares FB voltage against VREF to regulate output, while current-limit protection triggers at 800–1200mA (typ./max) and thermal shutdown prevents fault escalation.
Operation relies on external feedback resistors (R1/R2) to set VOUT = 1×(1 + R1/R2), with line regulation ≤0.12% and load regulation ≤1.2%. The CE/SS pin provides both enable control (VCEH ≥1.4V, VCEL ≤0.6V) and soft-start timing via external capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 5.5V - supports single-cell Li-ion, Li-poly, or triple-AA alkaline inputs without pre-regulation |
| Switching Frequency | 600kHz (typ.) - enables use of small 10µH inductors and low-ESR ceramic capacitors for board space reduction |
| Feedback Reference | 1.0V (typ., ±2.5% tolerance) - sets output accuracy when using standard resistor ratios (e.g., R1=100kΩ, R2=30.1kΩ → 4.3V) |
| Standby Current | 2µA (typ.) - extends battery life in always-on sleep states of handheld devices |
| Peak Efficiency | 93% (at VIN=5V, VOUT=3.3V, IOUT=300mA) - minimizes thermal rise and power loss in thermally constrained enclosures |
| Current Limit | 1000mA (typ.) - protects external MOSFETs and inductor during short-circuit or overload conditions |
| Rdson (HS FET) | 350–450mΩ (at IOUT=300mA) - determines conduction loss and thermal dissipation under full load |
Pinout & Package
SOT25 package: 5-pin, surface-mount, lead-free, green molding compound; dimensions per AP02001 pad layout; thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CE/SS | Chip Enable / Soft-Start Control | Active-high enable; voltage <0.6V forces shutdown (ISTB=2µA); external capacitor to GND sets soft-start ramp time |
| 2: VOUT | Power Output | Switched output node connected to external inductor and output capacitor; carries pulsed high-current waveform |
| 3: VCC | Input Supply | Main power input (2.2–5.5V); powers internal circuitry and gate driver; requires local 0.1µF bypass |
| 4: GND | Ground Reference | Power and signal return path; must be low-impedance connection to minimize noise coupling into FB and CE/SS |
| 5: FB | Feedback Input | Resistor-divider midpoint; compared to 1.0V internal reference to regulate VOUT; high-impedance node sensitive to PCB leakage |
Key Features
| Feature | Design Value |
|---|---|
| Dual PWM/PFM operation | Automatically switches to PFM below ~10mA load, maintaining >85% efficiency across 10µA–800mA range |
| Adjustable output voltage | VOUT set externally via resistor divider (FB pin), supporting 1.2V–5.0V outputs with ±2.5% accuracy |
| Integrated soft-start control | External capacitor on CE/SS pin provides monotonic VOUT ramp, preventing inrush current and overshoot |
| Comprehensive protection | Current limit (1000mA typ.), thermal shutdown, and UVLO (2.0V min.) ensure robust operation under fault conditions |
| Low quiescent current | 90–120µA operating supply current (ICCQ) enables long-term operation from coin cells or energy-harvesting sources |
Applications
| Electronic Information Organizers | Palmtop Computers |
|---|---|
Use Scenario: Power management in pen-based PDAs with flash memory, LCD, and IR transceiver. IC Role / Device Role / Timing Role: Primary buck regulator supplying 3.3V core logic and 1.8V I/O rails from single Li-ion cell. Use Value: PFM mode sustains >88% efficiency at 50µA display-backlight standby current, extending battery runtime by 32% vs. fixed-frequency converters. | Use Scenario: Compact handheld computing device with ARM processor, QVGA LCD, and SD card interface. IC Role / Device Role / Timing Role: Main system regulator delivering 1.2V CPU core and 3.3V peripheral voltage from 3.6V nominal battery. Use Value: 600kHz switching allows 10µH inductor and 68µF ceramic output cap, reducing solution size by 40% versus 1MHz alternatives requiring smaller but higher-cost magnetics. |
| Cellular Handsets | Portable Audio Systems |
Use Scenario: Dual-SIM GSM/WCDMA phone with RF front-end, baseband processor, and backlight LED driver. IC Role / Device Role / Timing Role: Secondary buck converter generating stable 2.8V RF bias rail independent of main PMIC. Use Value: 2µA standby current enables zero-power retention of RF calibration data during deep-sleep modes, eliminating need for backup battery. | Use Scenario: Bluetooth-enabled MP3 player with OLED display, audio DAC, and Class-D amplifier. IC Role / Device Role / Timing Role: Dedicated 1.8V supply for digital audio subsystem (codec, memory, MCU) with low-noise regulation. Use Value: Low 120µA ICCQ and 0.12% line regulation prevent audible switching noise coupling into analog audio paths during battery voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP63202WU-7 | Higher 2A current capability, 1.2MHz switching, integrated inductor option available | Better suited for higher-power SoC applications; larger solution size due to integrated inductor | Select when >800mA continuous load or faster transient response required |
| TPS62231DRVR | 3MHz fixed-frequency operation, 0.9V reference, 1.5µA ISTB, DSBGA package | Ultra-low standby current ideal for IoT sensors; smaller footprint but lower max output current (600mA) | Select when minimum quiescent current and ultra-compact layout are prioritized over output current headroom |
Compared with AP1604AWL-7, AP63202WU-7 offers higher current and frequency at the cost of board area, while TPS62231DRVR trades output capability for ultra-low ISTB and package miniaturization-making AP1604AWL-7 optimal for balanced portable power where 800mA, 600kHz, and 2µA standby define the design envelope.
Availability
AP1604AWL-7 is available at Aetrix Electronics and suitable for electronic information organizers, palmtop computers, and cellular handsets requiring stable component supply, RoHS-compliant packaging, and long-lifecycle availability.
Supply support for AP1604AWL-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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for high-volume consumer and industrial markets.
The AP1604A belongs to Diodes' high-efficiency DC/DC converter product line, designed specifically for battery-powered portable electronics needing wide-input-range regulation, light-load efficiency, and minimal external component count.
FAQ
What is the minimum input voltage required for AP1604AWL-7 to regulate output?
The AP1604AWL-7 requires a minimum input voltage of 2.0V to maintain regulation, as defined by its UVLO threshold. Below this level, the device disables switching and enters shutdown mode to prevent unstable output behavior. This ensures reliable start-up from partially discharged Li-ion cells down to 2.8V open-circuit voltage, corresponding to ~20% remaining capacity.
How is output voltage adjusted on AP1604AWL-7?
Output voltage is set externally using a resistor divider between VOUT and GND, with the midpoint connected to the FB pin. The internal 1.0V reference is compared to FB voltage, so VOUT = 1.0V × (1 + R1/R2). Recommended R2 values range from 10kΩ to 100kΩ; R1 should be 100kΩ–200kΩ to minimize divider current while maintaining accuracy.
Does AP1604AWL-7 require an external Schottky diode?
Yes, the AP1604AWL-7 requires an external Schottky diode (e.g., B240A) in the standard buck topology to provide freewheeling current path during low-side switch off-time. The diode must have ≤0.4V forward voltage and ≥1A peak repetitive reverse voltage rating to ensure efficiency and reliability under maximum load and temperature conditions.
Can AP1604AWL-7 operate without soft-start components?
Yes, AP1604AWL-7 operates without external soft-start components-the CE/SS pin defaults to enable when pulled high, and VOUT ramps naturally due to internal soft-start circuitry. However, omitting the external capacitor may cause output overshoot (>5%) during cold start; adding a 10nF–100nF capacitor to CE/SS improves monotonicity and reduces inrush stress on input capacitors.
AP1604AWL-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.2V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 800mA
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP1604AWL-7 FAQ
1.How can I place an order for AP1604AWL-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1604AWL-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 AP1604AWL-7 reliable?
The price and inventory of AP1604AWL-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1604AWL-7 is usually 5 days.
3.What payment methods are accepted for AP1604AWL-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1604AWL-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1604AWL-7?
AP1604AWL-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1604AWL-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 AP1604AWL-7?
For technical support, including AP1604AWL-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1604AWL-7 requirements.
6.How does Aetrix verify that AP1604AWL-7 is sourced from the original manufacturer or authorized distributors?
All AP1604AWL-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 AP1604AWL-7 meets industry standards.
7.What is the process for return or replacement of AP1604AWL-7?
All AP1604AWL-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1604AWL-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 AP1604AWL-7 part is unused and in its original packaging.
Return procedure for AP1604AWL-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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