My Inquiry
My Account
Diodes Incorporated AP7370-36SA-7
- Part No.:
- AP7370-36SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7370-36SA-7.pdf
- Description:
- IC REG LINEAR 3.6V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,472
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7370-36SA-7 from Diodes Incorporated is a 3.6V fixed-output, 300mA ultra-low dropout (ULDO) linear regulator in SOT23 package, featuring 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, and reverse current protection - designed for power management in portable instrumentation and battery-powered USB devices.
For engineers reviewing the AP7370-36SA-7 datasheet, AP7370-36SA-7 pinout, AP7370-36SA-7 application, or AP7370-36SA-7 equivalent, key selection criteria include wide VIN range (3.2–18V), ultra-low quiescent current (1.5–2.5µA), thermal shutdown at +160°C, compatibility with low-ESR ceramic capacitors, and SOT23 footprint constraints for space-constrained designs.
Technical Context
The AP7370-36SA-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 3.6V output, current-limit circuit (350mA typ), chip-enable logic, and reverse-current blocking - enabling stable regulation under variable load and input conditions without external compensation.
Its architecture supports operation from -40°C to +125°C junction temperature, delivers <0.5% load regulation across 1–300mA, maintains ±100ppm/°C output voltage drift, and features thermal hysteresis of +20°C to prevent oscillation during shutdown recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.6V ±1% - ensures stable MCU core or sensor biasing within tight tolerance bands |
| Max Input Voltage | 18V - supports direct connection to unregulated 12V rails or automotive transients |
| Dropout Voltage | 500mV @ 100mA - enables regulation down to VIN = 4.1V, critical for single-cell Li-ion systems |
| Quiescent Current | 1.5–2.5µA - extends battery life in always-on metering and weighing scale standby modes |
| Current Limit | 350mA min - provides robust short-circuit protection without external foldback circuitry |
| Thermal Shutdown | +160°C with +20°C hysteresis - prevents latch-up during sustained overload in sealed enclosures |
| Line Regulation | 0.05%/V - minimizes output drift across wide input swings (e.g., 5.3V to 18V) |
Pinout & Package
SOT23-3 package: 1.30mm × 2.40mm × 0.915mm body, surface-mount, RoHS-compliant, no lead added.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.2–18V with internal overvoltage clamp |
| 2 | GND | Power ground reference; tied to exposed pad in thermal path for SOT23 |
| 3 | VOUT | Regulated 3.6V output; requires ≥1µF low-ESR ceramic capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 3.2V to 18V - eliminates need for pre-regulation stages in multi-rail systems |
| Reverse current protection | Blocks backfeed from VOUT to VIN when input is absent - prevents battery drain in backup power paths |
| Low ESR capacitor compatible | Stable with ≥1µF X5R/X7R ceramics - reduces BOM count vs. tantalum or electrolytic solutions |
| Ultra-low ground current | 2.5µA max at full load - enables >10-year battery life in low-duty-cycle portable instruments |
| Thermal shutdown with hysteresis | +160°C trip / +140°C recovery - avoids cycling during transient overloads in compact PCB layouts |
Applications
| Portable Weighing Scales | Metering Devices |
|---|---|
Use Scenario: Battery-powered digital kitchen or industrial scales requiring millivolt-level ADC reference stability. IC Role / Device Role / Timing Role: Primary 3.6V supply for 24-bit sigma-delta ADC and microcontroller core. Use Value: ±1% output accuracy and <0.5% load regulation ensure consistent weight resolution across 0–300mA dynamic current draw. |
Use Scenario: Smart electricity/water meters operating on primary lithium batteries for 10+ years. IC Role / Device Role / Timing Role: Always-on LDO powering real-time clock, metrology ASIC, and RF transceiver sleep mode. Use Value: 1.5µA quiescent current extends battery service life while maintaining 3.6V rail integrity during wake-up bursts. |
| Laptop Peripheral Modules | USB-Powered Test Instruments |
Use Scenario: Docking station add-on modules (e.g., HDMI audio extractors) drawing burst current from USB 3.0 bus. IC Role / Device Role / Timing Role: Local 3.6V regulator for USB interface ICs and level translators. Use Value: 500mV dropout allows reliable operation even when USB bus sags to 4.1V under load. |
Use Scenario: Handheld multimeters or oscilloscope probes powered solely via USB-C PD negotiation. IC Role / Device Role / Timing Role: Post-regulator for precision analog front-end and display controller. Use Value: Reverse current protection prevents backfeed into USB port during hot-swap events or cable disconnects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-36SA-7 | Successor device with improved PSRR (>60dB @ 1kHz), lower dropout (400mV @ 100mA), and same SOT23-3 footprint | Recommended for new designs requiring higher noise immunity in sensitive analog signal chains | Select AP7375-36SA-7 where enhanced ripple rejection or tighter thermal performance is required |
| MCP1703T-3602E/MB | Microchip 3.6V LDO; 6V max VIN, 250mA rating, 1.8µA IQ, but lacks reverse current protection | Suitable for cost-sensitive, low-power embedded controllers where input voltage never exceeds 6V | Choose only if input stays ≤6V and reverse-blocking is handled externally |
Compared with AP7370-36SA-7, AP7375-36SA-7 offers superior PSRR and lower dropout for next-gen designs, while MCP1703T-3602E/MB trades input voltage headroom and reverse protection for lower unit cost in constrained-voltage applications.
Availability
AP7370-36SA-7 is available at Aetrix Electronics and suitable for portable weighing scales, utility metering systems, and USB-powered test instruments requiring stable component supply with long-term lifecycle support.
Supply support for AP7370-36SA-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.
The AP7370 series belongs to Diodes' high-reliability ULDO regulator product line, engineered specifically for battery-powered instrumentation and portable electronics demanding wide-input, low-quiescent-current regulation.
FAQ
Is AP7370-36SA-7 recommended for new designs?
No - Diodes Incorporated explicitly marks AP7370-36SA-7 as "NOT RECOMMENDED FOR NEW DESIGN" in its official datasheet (DS41820 Rev. 2-3). The AP7375-36SA-7 is the designated successor with improved specifications and full design support.
What is the minimum input voltage required for 3.6V output regulation?
The AP7370-36SA-7 requires VIN ≥ 3.2V per Recommended Operating Conditions. At 100mA load, dropout is 500mV, so stable 3.6V output needs VIN ≥ 4.1V; below that, regulation degrades progressively.
Can AP7370-36SA-7 be used with ceramic output capacitors?
Yes - the device is explicitly characterized and guaranteed stable with ≥1.0µF low-ESR ceramic capacitors (X5R/X7R), eliminating need for larger, less reliable tantalum or aluminum electrolytic types.
Does AP7370-36SA-7 provide reverse current protection?
Yes - the datasheet confirms integrated reverse current protection, preventing current flow from VOUT to VIN when input is removed or falls below output voltage - critical for battery backup and hot-swap safety.
AP7370-36SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 3.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 2.5 µA
- Current - Supply (Max):
- 300 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Reverse Current, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP7370-36SA-7 FAQ
1.How can I place an order for AP7370-36SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-36SA-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 AP7370-36SA-7 reliable?
The price and inventory of AP7370-36SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-36SA-7 is usually 5 days.
3.What payment methods are accepted for AP7370-36SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-36SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-36SA-7?
AP7370-36SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-36SA-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 AP7370-36SA-7?
For technical support, including AP7370-36SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-36SA-7 requirements.
6.How does Aetrix verify that AP7370-36SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-36SA-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 AP7370-36SA-7 meets industry standards.
7.What is the process for return or replacement of AP7370-36SA-7?
All AP7370-36SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-36SA-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 AP7370-36SA-7 part is unused and in its original packaging.
Return procedure for AP7370-36SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7370-36SA-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 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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
