My Inquiry
My Account
Diodes Incorporated AP7311-12WG-7
- Part No.:
- AP7311-12WG-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7311-12WG-7.pdf
- Description:
- IC REG LINEAR 1.2V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,295
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7311-12WG-7 from Diodes Incorporated is a 150mA fixed-output (1.2V) low-dropout linear regulator in SOT25 package, featuring 65µA quiescent current, 150mV dropout at full load, and 65dB PSRR at 100Hz. It integrates enable control, thermal shutdown, current limiting, and short-circuit protection - designed for battery-powered portable devices requiring stable, ultra-low-power voltage regulation.
For engineers reviewing the AP7311-12WG-7 datasheet, AP7311-12WG-7 pinout, AP7311-12WG-7 application, or AP7311-12WG-7 equivalent, key selection criteria include fixed 1.2V output accuracy (±2%), fast 80µs startup, stability with 1µF ceramic output capacitor, and operation across –40°C to +85°C ambient.
Technical Context
The AP7311-12WG-7 implements a P-channel MOSFET pass element with internal 0.4V bandgap reference and error amplifier, enabling precise 1.2V regulation without external feedback components. Its EN pin provides active-high logic control with VIH = 1.4V and VIL = 0.4V thresholds.
Protection circuitry includes foldback current limiting (200–300mA), short-circuit clamping (~50mA), and thermal shutdown at 140°C with 15°C hysteresis. The device maintains regulation down to 2V input and delivers excellent transient response due to optimized internal compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±2% over –40°C to +85°C; enables direct replacement of 1.2V logic rails without resistor network. |
| Max Output Current | 150mA continuous; sufficient for low-power microcontrollers, sensors, and RF front-end biasing. |
| Quiescent Current | 65µA typical at full load; minimizes standby power loss in always-on battery applications. |
| Dropout Voltage | 150mV typical at 150mA; allows operation from 1.35V input while maintaining 1.2V output. |
| PSRR | 65dB at 100Hz; suppresses low-frequency noise from switching DC/DC converters upstream. |
| Start-up Time | 80µs from EN high to regulated 1.2V; supports rapid wake-up in duty-cycled systems like GSM baseband. |
| Stability | Guaranteed with ≥1µF X5R/X7R ceramic output capacitor; eliminates need for electrolytic or tantalum. |
Pinout & Package
SOT25 (5-pin, 2.9mm × 1.6mm × 1.1mm) surface-mount package with RoHS-compliant lead-free finish and "Green" molding compound (no Br/Sb).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2V–6V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin for noise immunity. |
| 2 - GND | Power ground reference | Common return path for input, output, and enable; must connect to low-impedance PCB ground plane. |
| 3 - EN | Enable control input | Active-high logic interface; tie to IN for always-on operation; drives <1µA leakage when off. |
| 4 - NC | No connection | Internally unconnected; must remain floating - no external connection or PCB trace. |
| 5 - OUT | Regulated 1.2V output | Delivers up to 150mA; bypassed with ≥1µF ceramic capacitor directly between OUT and GND. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 65µA at full 150mA load enables >1-year battery life in coin-cell-powered IoT sensors. |
| Fast transient response | Stabilizes within microseconds during 0→150mA load steps - critical for GSM/TDMA burst-mode operation. |
| Integrated protection | Thermal shutdown (140°C), current limit (300mA), and short-circuit clamp (50mA) eliminate need for external safety circuitry. |
| Small-footprint stability | Operates reliably with 1µF ceramic output cap - reduces BOM count and PCB area vs. legacy LDOs requiring ≥10µF. |
| Wide input range | 2V–6V operation supports single-cell Li-ion (2.7–4.2V), dual-cell alkaline (2–3.2V), and USB-powered systems. |
Applications
| Portable Medical Sensors | GSM Baseband Power |
|---|---|
|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell with intermittent Bluetooth LE transmission. IC Role / Device Role / Timing Role: Primary 1.2V supply for ultra-low-power MCU and analog front-end; enabled only during measurement bursts. Use Value: 65µA quiescent current extends battery life beyond 18 months; 80µs startup synchronizes with BLE radio wake-up timing. |
Use Scenario: TDMA-based GSM handset baseband IC requiring clean 1.2V core voltage during transmit/receive cycles. IC Role / Device Role / Timing Role: Local LDO delivering fast-transient 1.2V to DSP and RF synthesizer blocks. Use Value: Sub-100µs load step recovery prevents voltage droop-induced bit errors; 65dB PSRR rejects switcher ripple. |
| Industrial Sensor Nodes | USB-Powered Peripherals |
|
Use Scenario: LoRaWAN node using AA batteries and sleeping >99% of time, waking hourly for sensor readout and transmission. IC Role / Device Role / Timing Role: Always-on 1.2V rail for real-time clock and wake-up controller; powers main MCU only on demand. Use Value: Low dropout (150mV) allows usable runtime down to 1.35V battery voltage; thermal shutdown prevents failure in sealed enclosures. |
Use Scenario: USB 2.0 audio interface dongle drawing power solely from host port, requiring clean 1.2V for DAC and op-amps. IC Role / Device Role / Timing Role: Post-regulator cleaning noisy 5V USB supply before sensitive analog signal chain. Use Value: 65dB PSRR at 100Hz suppresses USB switcher noise; 1µF ceramic stability simplifies layout in space-constrained dongle PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | 150mA, 1.2V fixed, 1.6µA IQ (lower), but 600mV dropout at 150mA (higher); SOT23-5 package. | Better for ultra-deep sleep, worse for low-input-voltage operation (requires ≥1.8V input). | Select if system prioritizes lowest possible standby current over input voltage headroom. |
| TPS70612DBVR | 150mA, 1.2V fixed, 900nA IQ (ultra-low), but 220mV dropout at 150mA; requires ≥2.2µF output capacitance. | Superior for energy-harvesting systems; less suitable for compact layouts due to larger cap requirement. | Select when nanowatt IQ dominates design constraints and board space permits ≥2.2µF ceramic. |
Compared with MCP1700T-1202E/TT and TPS70612DBVR, the AP7311-12WG-7 uniquely balances ultra-low IQ (65µA), low dropout (150mV), and minimal 1µF stability - making it optimal for space-constrained, battery-powered systems needing both long runtime and wide input voltage support.
Availability
AP7311-12WG-7 is available at Aetrix Electronics and suitable for portable medical sensors, GSM baseband power, industrial sensor nodes, and USB-powered peripherals requiring stable component supply with guaranteed long-term availability.
Supply support for AP7311-12WG-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 industrial, computing, and consumer markets.
The AP7311 belongs to Diodes' low-quiescent-current LDO family, engineered specifically for battery-constrained portable electronics where extended runtime, fast transient response, and minimal external components are critical.
FAQ
What is the minimum input voltage required for AP7311-12WG-7 to regulate 1.2V output at 150mA?
The AP7311-12WG-7 requires a minimum input voltage of 1.35V to maintain regulation at 150mA load, based on its typical 150mV dropout voltage. At lower loads, dropout decreases - e.g., ~50mV at 10mA - allowing operation down to ~1.25V input under light conditions. Input must remain ≥2V per absolute maximum rating.
Can AP7311-12WG-7 be used without an output capacitor?
No - an output capacitor is mandatory for stability and transient performance. The device is specified to be stable with ≥1µF X5R/X7R ceramic capacitors (ESR 10–200mΩ). Omitting the capacitor causes oscillation and unregulated output; even low-ESR tantalum or aluminum polymer types require ≥2.2µF and are not recommended per datasheet validation.
Is the EN pin internally pulled up or down?
The EN pin has no internal pull-up or pull-down; it presents <1µA leakage current in either state. To ensure reliable turn-on, EN must be actively driven high (≥1.4V) or tied directly to IN. Leaving EN floating risks undefined operation due to noise coupling or leakage-induced partial enable.
Does AP7311-12WG-7 support reverse polarity or backfeed protection?
No - the AP7311-12WG-7 lacks reverse-voltage or reverse-current protection. If OUT voltage exceeds IN (e.g., during hot-swap or backup battery scenarios), current flows backward through the pass FET, potentially damaging the IC or upstream source. An external Schottky diode in series with IN is required for such use cases.
AP7311-12WG-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:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 75 µA
- Current - Supply (Max):
- 85 µA
- PSRR:
- 65dB (100Hz)
- 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
AP7311-12WG-7 FAQ
1.How can I place an order for AP7311-12WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7311-12WG-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 AP7311-12WG-7 reliable?
The price and inventory of AP7311-12WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7311-12WG-7 is usually 5 days.
3.What payment methods are accepted for AP7311-12WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7311-12WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7311-12WG-7?
AP7311-12WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7311-12WG-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 AP7311-12WG-7?
For technical support, including AP7311-12WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7311-12WG-7 requirements.
6.How does Aetrix verify that AP7311-12WG-7 is sourced from the original manufacturer or authorized distributors?
All AP7311-12WG-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 AP7311-12WG-7 meets industry standards.
7.What is the process for return or replacement of AP7311-12WG-7?
All AP7311-12WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7311-12WG-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 AP7311-12WG-7 part is unused and in its original packaging.
Return procedure for AP7311-12WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7311-12WG-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
