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Diodes Incorporated AP1604AWG-7
- Part No.:
- AP1604AWG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- -
- Datasheet:
-
AP1604AWG-7.pdf
- Description:
- IC REG BUCK ADJ 800MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:5,778
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Product details
Overview
AP1604AWG-7 from Diodes Incorporated is a PWM/PFM dual-mode synchronous 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.
For engineers reviewing the AP1604AWG-7 datasheet, AP1604AWG-7 pinout, AP1604AWG-7 application, or AP1604AWG-7 equivalent, this device supports compact multi-rail power design in portable electronics requiring ultra-low standby current (2µA), light-load PFM efficiency optimization, and externally adjustable soft-start timing via CE/SS capacitor.
Technical Context
The AP1604AWG-7 integrates high-speed low-Rdson MOSFET drivers (350–450mΩ) and a dual-mode control architecture that automatically transitions between PWM (heavy load) and PFM (light load) to maintain >90% efficiency across 10mA–800mA output range. Its error amplifier compares FB voltage against 1.0V reference to regulate output.
It features internal thermal shutdown, cycle-by-cycle current limiting (800–1200mA peak), UVLO (2V min), and CE/SS pin that enables chip enable and soft-start control via external capacitor-no external bias required for startup sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V–5.5V: Supports single-cell Li-ion, Li-poly, or dual-cell alkaline/battery-powered systems without pre-regulation. |
| Switching Frequency | 600kHz (typ): Enables use of small 10µH inductors and low-ESR ceramic capacitors for board space reduction. |
| Output Accuracy | ±2.5% over line/load/temp: Achieved via 1.0V internal reference and FB resistor-divider feedback path. |
| Standby Current | 2µA (typ): Allows deep-sleep mode in portable devices with near-zero quiescent drain during system idle. |
| Current Limit | 1000mA (typ): Protects external FET and inductor under short-circuit or overload while sustaining 800mA continuous output. |
| Efficiency | 93% (typ @ 5V→3.3V/300mA): Minimizes thermal rise and extends battery runtime in high-current portable loads. |
| Rdson (HS/Low-Side) | 350–450mΩ: Reduces conduction loss and improves light-load PFM efficiency without external MOSFETs. |
Pinout & Package
SOT25 (5-pin, lead-free, green molding compound) package with 0.95mm pitch, 2.9mm × 1.6mm footprint, and exposed thermal pad (not electrically connected). Compatible with standard reflow profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CE/SS | Chip Enable / Soft-Start Control | Active-high enable; external capacitor to GND sets soft-start ramp time and prevents inrush current. |
| 2: VOUT | Power Switch Output | Drives external inductor; connects to LC filter node and feedback divider top. |
| 3: VCC | Input Supply Pin | Bypassed with 0.1µF ceramic; powers internal circuitry and gate drivers directly from VIN. |
| 4: GND | Power & Signal Ground | Common return for VCC, FB, CE/SS, and power stage; requires low-impedance PCB plane connection. |
| 5: FB | Feedback Input | Resistor-divider midpoint; regulates output by comparing against 1.0V internal reference. |
Key Features
| Feature | Design Value |
|---|---|
| PWM/PFM Dual-Mode Operation | Automatic mode switching maintains ≥90% efficiency from 10mA to 800mA output without external control logic. |
| Integrated High-Speed Drivers | Low Rdson (350–450mΩ) MOSFET drivers eliminate need for external gate drivers or discrete switches. |
| Externally Adjustable Soft-Start | Capacitor on CE/SS pin controls output voltage ramp rate, preventing overshoot and inductor saturation at startup. |
| Thermal Shutdown + Cycle-by-Cycle Current Limit | Protects IC and external components under fault conditions; no latch-up-auto-recovery after fault clears. |
| Ultra-Low Standby Current | 2µA shutdown current enables >1-year battery shelf life in always-on portable devices with periodic wake-up. |
Applications
| Electronic Organizers | Portable Audio Systems |
|---|---|
Use Scenario: Handheld PDA with LCD backlight, flash memory, and real-time clock requiring stable 3.3V rail from single Li-ion cell. IC Role / Device Role / Timing Role: Primary buck regulator supplying main system voltage; operates in PFM mode during calendar sync (low ILOAD) and PWM during data transfer (high ILOAD). Use Value: 93% efficiency at 300mA and 2µA standby extend usable battery life by >25% versus fixed-frequency alternatives. | Use Scenario: MP3 player with OLED display and stereo DAC needing clean, ripple-free 1.8V and 3.3V rails. IC Role / Device Role / Timing Role: Core 3.3V supply; FB resistor network sets precise output; soft-start prevents pop-noise in audio amplifiers during power-up. Use Value: 600kHz switching allows <10µH inductor and eliminates audible coil whine common in sub-500kHz converters. |
| Cellular Phones | Multi-function Power Supplies |
Use Scenario: Feature phone baseband processor requiring 1.2V core and 2.8V I/O rails with dynamic load steps. IC Role / Device Role / Timing Role: Secondary buck converter for I/O domain; CE/SS pin synchronized to PMIC enable signal for coordinated power sequencing. Use Value: 85–90% maximum duty ratio supports high VIN-to-VOUT ratios (e.g., 4.2V→2.8V), minimizing dropout risk during battery discharge. | Use Scenario: USB-powered smart sensor hub with BLE radio, accelerometer, and EEPROM needing isolated 3.3V and 1.8V outputs. IC Role / Device Role / Timing Role: Main 3.3V source feeding LDOs; PFM mode reduces noise coupling into analog sensor paths during idle periods. Use Value: Low 2.2V minimum input enables operation down to nearly depleted USB power banks (≈2.4V), improving system uptime. |
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 output capability; 1.2MHz switching; integrated inductor option available; 1.2V reference. | Targets higher-current applications (e.g., Wi-Fi modules); requires different layout due to higher frequency and current density. | Select when >800mA sustained load or smaller solution size (integrated inductor) is required. |
| RT8059GJ6 | Fixed 3.3V output; no FB pin; 1.5MHz switching; 3.5µA quiescent current; SOT23-6 package. | Designed for plug-and-play 3.3V supply; lacks adjustable output and soft-start flexibility. | Select only for fixed-output, space-constrained designs where external resistor network and soft-start are unnecessary. |
Compared with AP63202WU-7 and RT8059GJ6, the AP1604AWG-7 uniquely balances adjustability (FB-based VOUT), ultra-low ISTB (2µA), and proven 600kHz PFM/PWM efficiency across wide load range-ideal for battery-sensitive portable systems where programmability and standby integrity are prioritized over raw current or integration level.
Availability
AP1604AWG-7 is available at Aetrix Electronics and suitable for electronic organizers, portable audio systems, and cellular phones requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for AP1604AWG-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 consumer, industrial, and automotive markets.
The AP1604A series belongs to Diodes' high-efficiency DC/DC converter product line, designed specifically for compact, battery-operated portable electronics demanding low quiescent current, flexible output configuration, and robust thermal performance in minimal footprint.
FAQ
What is the minimum input voltage required for AP1604AWG-7 to regulate output?
The AP1604AWG-7 requires a minimum input voltage of 2.0V to initiate regulation, but its guaranteed operational UVLO threshold is 2.0V (typical), with full specification compliance starting at 2.2V per datasheet. Below 2.2V, output may drop out or exhibit instability under load.
Can AP1604AWG-7 be used without an external soft-start capacitor?
Yes-the CE/SS pin functions as a simple enable input when no capacitor is connected; applying a logic-high voltage (>1.4V) enables the device immediately. However, omitting the soft-start capacitor risks inrush current and output overshoot during startup, especially with large output capacitance.
What is the recommended FB resistor value range for stable operation?
The datasheet specifies R1 = 100kΩ to 200kΩ (top resistor), with R2 selected to achieve target VOUT using VOUT = 1.0V × (1 + R1/R2). Total FB divider current should be 10–100µA; values outside this range may degrade regulation accuracy or increase noise susceptibility.
Does AP1604AWG-7 require an external Schottky diode in the buck topology?
No-the AP1604AWG-7 integrates synchronous rectification drivers and does not require an external catch diode. The internal low-side MOSFET replaces the diode, reducing conduction loss and improving efficiency, particularly at light loads.
AP1604AWG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AP1604AWG-7 FAQ
1.How can I place an order for AP1604AWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1604AWG-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 AP1604AWG-7 reliable?
The price and inventory of AP1604AWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1604AWG-7 is usually 5 days.
3.What payment methods are accepted for AP1604AWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1604AWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1604AWG-7?
AP1604AWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1604AWG-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 AP1604AWG-7?
For technical support, including AP1604AWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1604AWG-7 requirements.
6.How does Aetrix verify that AP1604AWG-7 is sourced from the original manufacturer or authorized distributors?
All AP1604AWG-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 AP1604AWG-7 meets industry standards.
7.What is the process for return or replacement of AP1604AWG-7?
All AP1604AWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1604AWG-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 AP1604AWG-7 part is unused and in its original packaging.
Return procedure for AP1604AWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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