My Inquiry
My Account
Diodes Incorporated AP7370-50WW-7
- Part No.:
- AP7370-50WW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7370-50WW-7.pdf
- Description:
- IC REG LINEAR 5V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7370-50WW-7 from Diodes Incorporated is a fixed 5.0V, 300mA ultra-low dropout (ULDO) linear regulator in SOT25 package, featuring 18V max input voltage, 500mV dropout at 100mA, ±1% output accuracy, and reverse current protection. It delivers stable power to USB peripherals, portable instrumentation, and battery-powered weighing scales where low quiescent current (1.5–2.5µA) and thermal shutdown are critical.
For engineers reviewing the AP7370-50WW-7 datasheet, AP7370-50WW-7 pinout, AP7370-50WW-7 application, or AP7370-50WW-7 equivalent, this page provides verified technical context, pin-level design meaning, real-world use cases, and validated alternative options for industrial and portable power management designs.
Technical Context
The AP7370-50WW-7 integrates a precision voltage reference, error amplifier, and resistor network to maintain 5.0V output with ±1% accuracy across -40°C to +125°C junction temperature. Its internal current limit circuit triggers at 350mA for VOUT > 2.5V, and thermal shutdown activates at +160°C with +20°C hysteresis.
Designed for high PSRR and low noise, it operates with ceramic capacitors as low as 1.0µF on input and output, supports line regulation of 0.05%/V, and achieves load regulation of ≤0.5% over full output current range - enabling reliable operation in dynamically loaded portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - ensures compatibility with 5V logic, USB peripheral rails, and analog sensor supplies without external feedback. |
| Max Input Voltage | 18V - supports wide-input applications including automotive accessory ports, multi-cell battery packs, and industrial 12V rails. |
| Dropout Voltage | 450–550mV @ 100mA - enables regulation down to VIN = 5.45V, preserving headroom in battery-discharge scenarios. |
| Quiescent Current | 1.5–2.5µA - extends battery life in always-on metering and weighing scale standby modes. |
| Current Limit | 350mA min - protects downstream circuitry during short-circuit events while allowing full 300mA continuous output. |
| Thermal Shutdown | +160°C activation with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Reverse Current Protection | Integrated - blocks backfeed from VOUT to VIN when input is absent, eliminating need for external blocking diode. |
Pinout & Package
SOT25 (WW) package: 5-pin surface-mount with exposed pad (EP) tied to GND for thermal enhancement. Pin 1 = VIN, Pin 2 = GND, Pin 3 = VOUT, Pins 4–5 = NC (no-connect) for fixed-output version.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts up to 18V DC and must be decoupled with ≥1µF ceramic capacitor near pin. |
| 2 | GND | Analog/digital ground reference; connects to EP for optimal thermal dissipation and noise immunity. |
| 3 | VOUT | Regulated 5.0V output; requires ≥1µF ceramic capacitor to stabilize loop and suppress load transients. |
| 4, 5 | NC | No internal connection - must remain unconnected per datasheet; floating or tied to GND degrades performance. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.2–18V) | Enables single-regulator support across multiple battery chemistries (Li-ion, LiFePO₄, 3×AA) and unregulated wall adapters. |
| Ultra-low quiescent current (1.5–2.5µA) | Reduces standby power loss to <13nW per µA at 5V, critical for multi-year battery life in portable instruments. |
| Low ESR capacitor compatibility | Stable with 1.0µF ceramic output cap - eliminates cost/size penalty of tantalum or electrolytic alternatives. |
| Reverse current protection | Prevents VOUT-to-VIN backflow during hot-swap or input brownout, avoiding system-level reset or data corruption. |
| Thermal shutdown with hysteresis | Auto-recovery after cooldown avoids latch-up failure in thermally constrained enclosures or high ambient environments. |
Applications
| Battery-Powered Weighing Scales | Portable Medical Instrumentation |
|---|---|
Use Scenario: Precision load-cell excitation and ADC reference supply in handheld digital scales operating from two AA batteries (1.8–3.2V) boosted to 5V rail. IC Role / Device Role / Timing Role: ULDO regulator providing clean, stable 5.0V for 24-bit sigma-delta ADC and microcontroller core logic. Use Value: 0.5% load regulation and ±100ppm/°C tempco ensure <0.01% measurement drift across operating temperature range. | Use Scenario: Powering glucose meter mainboard including LCD driver, optical sensor, and BLE radio during active test cycles. IC Role / Device Role / Timing Role: Primary 5V supply with reverse current protection preventing battery drain when USB charging is disconnected mid-session. Use Value: 1.5µA quiescent current extends coin-cell backup runtime to >6 months in sleep mode. |
| USB-Powered Test Equipment | Industrial Portable Meters |
Use Scenario: Regulating 5V from USB host port (4.75–5.25V) to power FPGA configuration memory and signal conditioning circuitry. IC Role / Device Role / Timing Role: Low-noise post-regulator improving PSRR by >40dB above 10kHz to reduce USB bus noise coupling into analog front-end. Use Value: 0.05%/V line regulation maintains output stability despite USB cable voltage drop under high-current loads. | Use Scenario: Supplying isolated RS-485 transceiver and microcontroller in handheld multimeter with 9V alkaline battery input. IC Role / Device Role / Timing Role: Wide-input LDO accepting 6–18V battery+boost input to deliver regulated 5.0V with thermal foldback during extended continuity testing. Use Value: 350mA current limit prevents overheating during 2A continuity test pulses while maintaining safe operating area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7375-50W5-7 | Successor device with same pinout, improved 0.5% output accuracy, lower 400mV dropout at 100mA, and enhanced thermal resistance (θJA = 145°C/W). | Recommended for new designs requiring tighter regulation or higher efficiency at light loads; not drop-in due to different marking and minor electrical tuning. | Select AP7375-50W5-7 for new designs needing longer-term supply assurance and tighter specs; AP7370-50WW-7 remains viable for legacy BOMs and cost-sensitive replacements. |
| MCP1703T-5002E/MB | Microchip 5V LDO in SOT-23-3; 250mA rating, 600mV dropout at 250mA, no reverse current protection, higher 4µA IQ. | Limited to lower-current applications; lacks reverse current blocking and thermal hysteresis - requires external diode and thermal monitoring. | Choose only if SOT-23-3 footprint is mandatory and reverse current protection is handled externally; otherwise avoid due to reduced safety margin. |
Compared with AP7375-50W5-7, the AP7370-50WW-7 offers proven field reliability but higher dropout and looser accuracy; versus MCP1703T-5002E/MB, it delivers superior thermal protection and true reverse-blocking capability essential for battery-backed systems.
Availability
AP7370-50WW-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and USB-powered test equipment requiring stable component supply with RoHS-compliant, halogen-free packaging.
Supply support for AP7370-50WW-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 AP7370 series belongs to Diodes' wide-input ULDO regulator product line, engineered specifically for portable and battery-operated applications demanding ultra-low IQ, reverse current blocking, and robust thermal protection in space-constrained packages.
FAQ
What is the recommended input capacitor for AP7370-50WW-7?
A minimum 1.0µF X5R/X7R ceramic capacitor placed within 2mm of VIN and GND pins is required for stability and transient response. Larger values (e.g., 4.7µF) improve ripple rejection but do not affect loop compensation. Avoid high-ESR types like aluminum electrolytics.
Can AP7370-50WW-7 be used with a 2.5V input to deliver 5V output?
No - AP7370-50WW-7 is a step-down linear regulator only. Its minimum input voltage is 3.2V (per Recommended Operating Conditions), and it cannot boost or invert voltage. A 2.5V source is insufficient to regulate 5.0V output; a switching boost converter would be required instead.
Is the EP (exposed pad) on the SOT25 package electrically connected?
Yes - the EP is internally connected to GND and must be soldered to a PCB thermal pad tied to the system ground plane. This connection is essential for achieving the specified θJA = 155°C/W and preventing thermal shutdown under 300mA load at ambient >60°C.
Why is AP7370 marked "Not Recommended for New Design"?
Diodes has designated AP7370 as NRND because the pin-compatible AP7375 offers improved specifications (tighter accuracy, lower dropout, better thermal resistance) and long-term supply assurance. AP7370 remains fully functional and supported for existing designs but is not promoted for new schematics.
AP7370-50WW-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):
- 18V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 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-25
AP7370-50WW-7 FAQ
1.How can I place an order for AP7370-50WW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-50WW-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 AP7370-50WW-7 reliable?
The price and inventory of AP7370-50WW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-50WW-7 is usually 5 days.
3.What payment methods are accepted for AP7370-50WW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-50WW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-50WW-7?
AP7370-50WW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-50WW-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 AP7370-50WW-7?
For technical support, including AP7370-50WW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-50WW-7 requirements.
6.How does Aetrix verify that AP7370-50WW-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-50WW-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 AP7370-50WW-7 meets industry standards.
7.What is the process for return or replacement of AP7370-50WW-7?
All AP7370-50WW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-50WW-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 AP7370-50WW-7 part is unused and in its original packaging.
Return procedure for AP7370-50WW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7370-50WW-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.…
