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Diodes Incorporated AP133-WG-7
- Part No.:
- AP133-WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP133-WG-7.pdf
- Description:
- IC REG LIN POS ADJ 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:519
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Product details
Overview
AP133-WG-7 from Diodes Incorporated is a 300mA adjustable-output low-dropout linear regulator in SOT25 package, featuring 40µA quiescent current, 350mV dropout at full load, 65dB PSRR at 1kHz, and ultra-fast 25µs startup. It delivers stable 1V–5V output for battery-powered portable electronics requiring minimal standby power and fast transient response.
For engineers reviewing the AP133-WG-7 datasheet, AP133-WG-7 pinout, AP133-WG-7 application, or AP133-WG-7 equivalent, key selection criteria include low-IQ operation across input range (2V–6V), thermal shutdown at +145°C, current limit protection (600mA typ.), and compatibility with 1µF ceramic output capacitors - critical for space-constrained mobile designs.
Technical Context
The AP133 integrates a PMOS pass transistor, precision 0.8V bandgap reference, error amplifier, and enable-controlled gate driver. Its architecture enables low dropout without external PNP transistors while maintaining stability with ultra-low-ESR ceramic capacitors.
Protection circuitry includes foldback current limiting (600mA typ.), short-circuit clamping (120mA), and thermal shutdown with 20°C hysteresis. The EN pin provides active-high logic control with VIH ≥ 1.4V and VIL ≤ 0.4V, supporting direct microcontroller interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 300mA max - supports baseband processors and RF ICs in handheld devices without thermal derating at ambient ≤+85°C |
| Quiescent Current | 40µA typ. - enables >340µA standby current reduction vs. 140µA alternatives, extending GSM phone standby time by ~1.4× |
| Dropout Voltage | 350mV at 300mA - maintains regulation down to VIN = VOUT + 0.35V, preserving headroom for Li-ion batteries at end-of-discharge |
| PSRR | 65dB at 1kHz - suppresses switching noise from DC/DC converters feeding RF/analog blocks in cellular handsets |
| Start-up Time | 25µs typ. - allows real-time entry/exit from deep-sleep modes in DSP-based applications without supply glitches |
| Reference Voltage | 0.8V ±2% - sets output accuracy via external resistor divider; R2 ≤ 250kΩ ensures reference stability |
| Thermal Shutdown | +145°C threshold with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking |
Pinout & Package
SOT25 package: 5-pin surface-mount, 1.6mm × 2.9mm footprint, 1.1mm height, RoHS-compliant "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input voltage supply | Bypassed to GND with ≥0.1µF capacitor; accepts 2V–6V input; must be routed with wide copper trace for low impedance |
| 2 GND | Power ground reference | Common return path for IN, OUT, and ADJ; requires low-inductance connection to PCB ground plane |
| 3 EN | Enable control input | Active-high logic interface (VIH ≥ 1.4V); tie to IN if always-on operation required; drives internal gate driver |
| 4 ADJ | Feedback reference node | Connects to resistor divider (R1/R2) setting VOUT = 0.8V × (1 + R1/R2); leakage <1µA preserves accuracy |
| 5 OUT | Regulated output | Delivers 1V–5V adjustable output; bypassed with 1µF–4.7µF X7R/X5R ceramic capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Low ESR capacitor support | Stable with 1µF ceramic output capacitor (10–100mΩ ESR), reducing BOM count and PCB area vs. tantalum solutions |
| Fast load transient response | Minimal overshoot/undershoot during 0→300mA load steps - sustains clean supply for GSM baseband ICs with 12.5% duty cycle |
| Adjustable output range | 1.0V–5.0V via external resistors - covers core voltages for DSPs (1.2V), I/O (1.8V/2.8V), RF (2.6V–3.0V), and analog (3.3V) |
| Integrated protection | Current limit (600mA), short-circuit clamp (120mA), and thermal shutdown (+145°C) eliminate need for external fault management circuitry |
| Ultra-low-noise operation | No added output noise beyond reference voltage drift; PSRR >65dB at 1kHz reduces ripple from noisy DC/DC sources |
Applications
| Cellular Baseband Power | GSM RF Front-End |
|---|---|
|
Use Scenario: Powering ARM-based baseband processors in 2G/3G handsets during burst transmit/receive cycles. IC Role / Device Role / Timing Role: Primary LDO supplying core logic (1.2V–1.8V) with fast transient response to handle 100µA ↔ 100mA load jumps within TDMA frames. Use Value: 25µs startup and <1% load regulation prevent processor brownouts during mode transitions, ensuring protocol compliance. |
Use Scenario: Providing clean 2.8V bias to LNA, mixer, and VCO stages in GSM handset RF transceivers. IC Role / Device Role / Timing Role: High-PSRR (65dB @1kHz) LDO rejecting switching noise from adjacent buck converters powering digital sections. Use Value: Maintains RF signal integrity by suppressing power-supply-induced phase noise and adjacent-channel interference. |
| Portable Audio Codec | Real-Time Clock (RTC) Backup |
|
Use Scenario: Supplying 3.3V to audio DAC/ADC and headphone amplifiers in Bluetooth headsets and MP3 players. IC Role / Device Role / Timing Role: Low-noise, low-IQ regulator delivering stable rail during dynamic audio playback with varying current demand. Use Value: 40µA quiescent current extends battery life in always-on audio streaming; small overshoot prevents pop/click artifacts. |
Use Scenario: Providing 1.8V backup supply to RTC circuits when main battery drops below 3.0V in smartphones. IC Role / Device Role / Timing Role: Always-on LDO operating from residual battery voltage (2.0V–3.2V) with minimal drain on aging cells. Use Value: 40µA IQ preserves months of RTC functionality without compromising primary system runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7330-WG-7 | 300mA, 25µA IQ, 200mV dropout at 300mA, fixed 3.3V output only | Lacks adjustability; optimized for fixed-rail systems where 3.3V suffices | Select when output voltage is fixed and lowest possible IQ is prioritized over flexibility |
| AP7343-WG-7 | 500mA, 35µA IQ, 220mV dropout, adjustable 1.2V–5.0V, DFN2020-6 only | Higher current capability and lower dropout; smaller DFN package requires tighter layout control | Select when higher load margin or improved thermal performance (θJA = 142°C/W) is needed |
Compared with AP133-WG-7, AP7330 offers lower quiescent current but no adjustability, while AP7343 provides higher current and lower dropout in a smaller package - both address newer design requirements where AP133 is marked "NOT RECOMMENDED FOR NEW DESIGN."
Availability
AP133-WG-7 is available at Aetrix Electronics and suitable for cellular phones, smart handhelds, Bluetooth headsets, and low-power portable instrumentation requiring stable component supply with consistent parametric performance across temperature and load.
Supply support for AP133-WG-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 high-reliability power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP133 belongs to Diodes' low-power LDO portfolio designed specifically for battery-operated portable electronics where ultra-low quiescent current, fast transient response, and small-footprint packaging are essential.
FAQ
What is the minimum input voltage required for AP133-WG-7 to regulate a 1.8V output?
The AP133-WG-7 requires VIN ≥ VOUT + VDROP. At 1.8V output and 300mA load, typical dropout is 350mV, so minimum VIN is 2.15V. Per datasheet Note 5, operation below VIN = 2.2V at cold temperatures may reduce output current capability, so 2.2V is recommended as practical minimum.
Can AP133-WG-7 operate without an external resistor divider?
No - the AP133-WG-7 is adjustable-only and requires an external R1/R2 divider connected between OUT, ADJ, and GND to set output voltage per VOUT = 0.8V × (1 + R1/R2). Leaving ADJ unconnected or floating will result in undefined output voltage and potential instability.
Is the SOT25 package of AP133-WG-7 thermally adequate for 300mA continuous operation at +85°C ambient?
Yes - with θJA = 176°C/W and maximum junction temperature of +150°C, power dissipation at 300mA and 350mV dropout is 105mW, resulting in ΔT = 18.5°C rise. Junction temperature remains at ~104°C, well within safe limits for continuous operation at +85°C ambient.
Does AP133-WG-7 require a minimum load current to maintain regulation stability?
No - the AP133-WG-7 is specified for stable operation from zero load to full 300mA. Application Note confirms "no minimum load is required to keep the device stable," and it remains regulated in no-load condition, making it suitable for intermittent-power systems like RTC backups.
AP133-WG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.45V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP133-WG-7 FAQ
1.How can I place an order for AP133-WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP133-WG-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 AP133-WG-7 reliable?
The price and inventory of AP133-WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP133-WG-7 is usually 5 days.
3.What payment methods are accepted for AP133-WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP133-WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP133-WG-7?
AP133-WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP133-WG-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 AP133-WG-7?
For technical support, including AP133-WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP133-WG-7 requirements.
6.How does Aetrix verify that AP133-WG-7 is sourced from the original manufacturer or authorized distributors?
All AP133-WG-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 AP133-WG-7 meets industry standards.
7.What is the process for return or replacement of AP133-WG-7?
All AP133-WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP133-WG-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 AP133-WG-7 part is unused and in its original packaging.
Return procedure for AP133-WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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