My Inquiry
My Account
Diodes Incorporated AP7351D-15W5-7
- Part No.:
- AP7351D-15W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7351D-15W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,281
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7351D-15W5-7 from Diodes Incorporated is a 1.5V fixed-output, 150mA ultra-low quiescent current LDO regulator in SOT25 package, featuring ±1% output accuracy, 0.5µA quiescent current, and enable control for battery-powered wearable electronics. It operates from 1.4V to 5.5V input and delivers stable 1.5V output with 0.43V typical dropout at 150mA load.
For engineers reviewing the AP7351D-15W5-7 datasheet, AP7351D-15W5-7 pinout, AP7351D-15W5-7 application, or AP7351D-15W5-7 equivalent, key selection criteria include ultra-low IQ (0.5µA), tight VOUT accuracy (±1%), EN-controlled shutdown (0.02µA standby), and compatibility with 0.1µF ceramic input/output capacitors in space-constrained portable designs.
Technical Context
The AP7351D-15W5-7 integrates a precision voltage reference, error amplifier, current-limit circuit, and active output discharge. Its internal resistor network fixes the output at 1.5V, eliminating external feedback components.
It supports wide-input operation (1.4V–5.5V) with thermal shutdown (+160°C) and hysteresis (+20°C), and achieves 60dB PSRR at 1kHz. The EN pin accepts logic-level control (VIL ≤ 0.4V, VIH ≥ 1.0V) and must not float.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% at +25°C; ±2% over −40°C to +85°C - ensures stable MCU core or sensor bias under temperature variation |
| Max Output Current | 150mA - sufficient to power low-power microcontrollers, BLE radios, or image sensors without derating |
| Quiescent Current | 0.5µA typical - extends battery life in always-on wearables by minimizing standby drain |
| Dropout Voltage | 0.43V typical at 150mA - enables regulation from 1.93V input, critical for single-cell Li-ion or coin-cell operation |
| PSRR | 60dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails |
| Enable Thresholds | VEN_H ≥ 1.0V, VEN_L ≤ 0.4V - compatible with 1.8V/3.3V GPIO without level-shifting |
| Thermal Shutdown | +160°C with +20°C hysteresis - protects against sustained overload in sealed enclosures |
Pinout & Package
SOT25 package (3.0mm × 2.8mm × 1.3mm), moisture sensitivity level 1, lead-free and RoHS-compliant. Matte tin-plated leads, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN1 (VOUT) | Regulated output node | Delivers fixed 1.5V; requires 0.1µF ceramic capacitor placed adjacent to minimize ESR-induced instability |
| PIN2 (GND) | Power ground reference | Must connect directly to low-impedance PCB ground plane to avoid voltage drop affecting regulation accuracy |
| PIN3 (EN) | Active-high enable input | Drives regulator ON when ≥1.0V; pulls into shutdown (0.02µA IQ) when ≤0.4V; must not be left floating |
| PIN4 (VIN) | Unregulated input supply | Accepts 1.4V–5.5V; requires local 0.1µF decoupling capacitor between PIN4 and PIN2 to suppress supply transients |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.5µA typical - reduces battery leakage in multi-year IoT edge nodes |
| Active output discharge | 35Ω internal FET - rapidly discharges VOUT on shutdown, preventing back-powering of upstream circuits |
| High PSRR at low frequency | 60dB @ 1kHz - maintains clean 1.5V rail despite ripple from buck converter switching at 500kHz–2MHz |
| Wide input voltage range | 1.4V to 5.5V - supports direct connection to single-cell Li-ion (2.7–4.2V), NiMH (0.9–1.4V per cell), or coin cells |
| Thermal protection with hysteresis | +160°C trip / +140°C recovery - prevents thermal runaway during transient overloads without oscillation |
Applications
| Wearable Fitness Tracker | IoT Sensor Node |
|---|---|
|
Use Scenario: Continuous heart-rate monitoring using optical sensor and ultra-low-power MCU in wrist-worn device. IC Role / Device Role / Timing Role: Primary 1.5V supply for analog front-end and digital core, enabled only during measurement bursts. Use Value: 0.5µA quiescent current extends CR2032 battery life beyond 12 months; active discharge prevents sensor bias leakage during sleep. |
Use Scenario: Battery-powered environmental sensor (temperature/humidity) transmitting data via LoRaWAN every 10 minutes. IC Role / Device Role / Timing Role: Stable 1.5V rail for ADC, microcontroller, and RF transceiver during brief active periods. Use Value: ±1% output accuracy ensures consistent ADC reference across temperature; 150mA headroom supports peak transmit current. |
| Wireless Camera Module | Medical Patch Monitor |
|
Use Scenario: Miniature HD camera module in smart home doorbell, powered by rechargeable Li-ion cell. IC Role / Device Role / Timing Role: Dedicated 1.5V LDO for image sensor interface and ISP logic, sequenced via EN after main power-up. Use Value: 0.43V dropout allows full 1.5V regulation down to 1.93V battery voltage, maximizing usable cell capacity. |
Use Scenario: Disposable ECG patch worn for 72-hour continuous cardiac monitoring. IC Role / Device Role / Timing Role: Precision 1.5V supply for low-noise instrumentation amplifier and SAR ADC. Use Value: 60dB PSRR rejects noise from Bluetooth LE radio; ±1% accuracy maintains clinical-grade signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-IQ LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1502E/TT (Microchip) | 1.5V fixed, 250mA, 1.6µA IQ, no active discharge, SOT23-5 | Lacks EN-controlled shutdown and output discharge; higher quiescent current reduces battery life in deep-sleep systems | Choose if cost sensitivity outweighs IQ and discharge requirements; verify layout compatibility with 5-pin SOT23 |
| Torex XC6210B152MR-G (Torex) | 1.5V fixed, 150mA, 0.6µA IQ, no EN pin, SOT25 | No enable function - regulator always on; lacks shutdown mode for system-level power gating | Select only for always-on applications; cannot replace AP7351D-15W5-7 where EN sequencing or zero-standby current is required |
Compared with MCP1700T-1502E/TT and XC6210B152MR-G, the AP7351D-15W5-7 uniquely combines sub-µA quiescent current, integrated EN control, and active output discharge in a 4-pin SOT25 - enabling true zero-power shutdown and safe power sequencing in compact, battery-limited systems.
Availability
AP7351D-15W5-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor nodes, wireless camera modules, and medical patch monitors requiring stable component supply with guaranteed long-term availability.
Supply support for AP7351D-15W5-7 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-efficiency power management, signal integrity, and protection solutions.
The AP7351D belongs to Diodes' ultra-low-IQ LDO family, designed specifically for extended-battery-life applications in wearables, IoT endpoints, and portable medical devices.
FAQ
What is the minimum input voltage required for AP7351D-15W5-7 to regulate 1.5V output at full 150mA load?
The minimum input voltage is determined by dropout voltage: 0.43V typical at 150mA, so VIN(min) = 1.5V + 0.43V = 1.93V. At worst-case (0.75V dropout), VIN must be ≥2.25V. Operation below 1.4V input is prohibited per Absolute Maximum Ratings.
Does AP7351D-15W5-7 require an external pull-up on the EN pin if unused?
No - the EN pin must not be left floating. If enable functionality is not needed, tie EN directly to VIN to maintain permanent ON state. Do not use a pull-up resistor, as it adds unnecessary leakage current that defeats the ultra-low-IQ advantage.
Can AP7351D-15W5-7 be used with ceramic output capacitors smaller than 0.1µF?
No - the datasheet specifies stability with ≥0.1µF ceramic COUT. Using smaller values risks oscillation due to insufficient phase margin. X5R/X7R dielectrics are recommended for minimal capacitance drift over temperature and bias.
Is the exposed pad (EP) on SOT25 electrically connected to GND in AP7351D-15W5-7?
No - the SOT25 package does not include an exposed pad. That feature applies only to the X2-DFN1010-4 (Type B) variant. The SOT25 version has standard matte tin-plated leads; thermal dissipation relies on copper area connected to PIN2 (GND) and PIN4 (VIN) traces.
AP7351D-15W5-7 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.75V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7351D-15W5-7 FAQ
1.How can I place an order for AP7351D-15W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7351D-15W5-7 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 AP7351D-15W5-7 reliable?
The price and inventory of AP7351D-15W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7351D-15W5-7 is usually 5 days.
3.What payment methods are accepted for AP7351D-15W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7351D-15W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7351D-15W5-7?
AP7351D-15W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7351D-15W5-7 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 AP7351D-15W5-7?
For technical support, including AP7351D-15W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7351D-15W5-7 requirements.
6.How does Aetrix verify that AP7351D-15W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7351D-15W5-7 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 AP7351D-15W5-7 meets industry standards.
7.What is the process for return or replacement of AP7351D-15W5-7?
All AP7351D-15W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7351D-15W5-7, 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 AP7351D-15W5-7 part is unused and in its original packaging.
Return procedure for AP7351D-15W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7351D-15W5-7 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…
