My Inquiry
My Account
Diodes Incorporated AP7370-12SA-7
- Part No.:
- AP7370-12SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7370-12SA-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,702
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7370-12SA-7 from Diodes Incorporated is a fixed-output 1.2V, 300mA ultra-low dropout (ULDO) linear regulator in SOT23 package, featuring 500mV dropout at 100mA, ±1% output voltage accuracy (for VOUT > 2.5V), 1.5–2.5µA quiescent current, and reverse current protection - designed for power management in space-constrained portable instrumentation and battery-powered metering systems.
For engineers reviewing the AP7370-12SA-7 datasheet, AP7370-12SA-7 pinout, AP7370-12SA-7 application, or AP7370-12SA-7 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in weighing scales and portable data loggers, and confirmed alternative regulators with documented functional trade-offs.
Technical Context
The AP7370-12SA-7 integrates a precision voltage reference, error amplifier, and resistor network to maintain stable 1.2V output across input voltages from 3.2V to 18V. Its internal current limit circuit activates at 350mA for VOUT > 2.5V (scaled to 200mA for ≤2.5V outputs), and thermal shutdown triggers at +160°C with +20°C hysteresis.
It supports low-ESR ceramic capacitors (1.0µF typical), achieves 0.05%/V line regulation and 0.5% load regulation, and blocks reverse current flow from VOUT to VIN - critical for multi-rail systems where supply sequencing or back-powering risks exist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±2% (VOUT ≤ 2.5V tolerance per datasheet) |
| Max Input Voltage | 18V - enables direct connection to 12V rails or stacked Li-ion batteries |
| Dropout Voltage | 600mV max @ 100mA - sustains regulation down to VIN = 1.8V for 1.2V output |
| Quiescent Current | 1.5–2.5µA - preserves battery life in always-on sensor nodes |
| Current Limit | 200mA (typical) - protects downstream circuitry during short-circuit events |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis - prevents permanent junction damage |
| Reverse Current Protection | Integrated - eliminates need for external blocking diode in shared-bus designs |
Pinout & Package
SOT23-3 package: compact 2.9mm × 1.3mm footprint with gull-wing leads; JEDEC MO-178AA compliant; RoHS 3 and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply pin - accepts 3.2V to 18V; requires local 1µF ceramic decoupling |
| 2 | GND | Power ground reference - must be low-impedance connection to system ground plane |
| 3 | VOUT | Regulated 1.2V output - drives load up to 300mA with <0.5% load regulation |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.2–18V) | Supports single-supply operation across industrial, automotive, and legacy adapter inputs without pre-regulation |
| Ultra-low IQ (1.5–2.5µA) | Extends battery runtime in maintenance-free IoT sensors operating for >5 years on coin cells |
| Reverse current protection | Eliminates external Schottky diode in multi-source power systems, reducing BOM count and forward drop loss |
| Low-ESR capacitor compatibility | Enables use of small, cost-effective 0402/0603 ceramic capacitors instead of larger tantalum or aluminum electrolytics |
| Thermal shutdown + hysteresis | Provides self-recovery after overtemperature fault without requiring system-level reset logic |
Applications
| Weighing Scales | Portable Data Loggers |
|---|---|
Use Scenario: Precision analog front-end (AFE) and microcontroller core power in handheld digital scales. IC Role / Device Role / Timing Role: Primary 1.2V LDO supplying ADC reference and low-power MCU core voltage. Use Value: ±2% output accuracy and 0.5% load regulation ensure consistent ADC reference stability across battery discharge cycles. |
Use Scenario: Battery-backed environmental monitoring node with temperature/humidity/pressure sensors. IC Role / Device Role / Timing Role: Standby-mode power source for RTC, memory, and wake-up controller during deep-sleep intervals. Use Value: 1.5µA quiescent current minimizes self-discharge, enabling >3-year operation on CR2032 cell. |
| Industrial Panel Meters | USB-Powered Test Equipment |
Use Scenario: Compact DIN-rail mounted multimeter with isolated RS-485 interface. IC Role / Device Role / Timing Role: Post-isolation 1.2V rail for isolated microcontroller and signal conditioning ICs. Use Value: Reverse current protection prevents back-feeding into isolated DC-DC converter during fault conditions. |
Use Scenario: Handheld oscilloscope probe with USB-C bus-powered operation. IC Role / Device Role / Timing Role: Local 1.2V regulator for FPGA configuration logic and ADC biasing. Use Value: 500mV dropout allows full 1.2V regulation even when USB bus drops to 4.4V under heavy load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361-12SA-7 | Lower 150mA output current; identical 1.2V output, SOT23 package, and 1.5µA IQ | Not suitable for loads >150mA; acceptable only in lower-current sensor interfaces | Select when load current is confirmed ≤120mA and cost sensitivity outweighs headroom needs |
| MCP1700T-1202E/TT | 100mA output, 6µA IQ, 1.2V fixed, SOT23-3; no reverse current protection | Lacks reverse current blocking - requires external diode in bidirectional power paths | Choose only for non-critical, single-rail, low-cost consumer devices with no back-power risk |
Compared with AP7370-12SA-7, AP7361-12SA-7 trades 150mA current capability for identical form factor and ultra-low IQ, while MCP1700T-1202E/TT sacrifices both current drive and reverse protection to achieve lower unit cost - making AP7370-12SA-7 the only option supporting 300mA loads with integrated safety features in SOT23.
Availability
AP7370-12SA-7 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered test equipment, and industrial metering applications requiring stable component supply and long-term manufacturability assurance.
Supply support for AP7370-12SA-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 and consumer markets.
The AP7370 series belongs to Diodes' wide-input ULDO regulator product line, engineered specifically for battery-powered and multi-rail embedded systems demanding low IQ, reverse current blocking, and robust thermal performance in miniature packages.
FAQ
Is AP7370-12SA-7 recommended for new designs?
No - Diodes Incorporated explicitly marks AP7370 as "NOT RECOMMENDED FOR NEW DESIGN" and recommends AP7375 as its functional successor. AP7370-12SA-7 remains available for existing production and legacy design support, but new projects should evaluate AP7375 for improved specs and long-term supply assurance.
What is the minimum input voltage required for regulation at 1.2V output?
The datasheet specifies a minimum input voltage of 3.2V for all operating conditions. At 100mA load, dropout is 600mV max, so VIN must be ≥1.8V to sustain 1.2V output - however, the absolute minimum VIN is 3.2V due to internal circuitry requirements, not just dropout margin.
Does AP7370-12SA-7 require an external enable signal?
No - AP7370-12SA-7 has no enable (EN) pin. It operates continuously when VIN is within specification. The SOT23-3 variant lacks the NC pins present in SOT25/U-DFN versions; all three pins are functional (VIN, GND, VOUT), and the device has no shutdown mode.
Can AP7370-12SA-7 be used with ceramic output capacitors smaller than 1.0µF?
While the datasheet specifies 1.0µF ceramic for characterization, Diodes confirms stable operation with ≥0.47µF X7R ceramics (per application note AP02011). Values below 0.47µF may compromise transient response and PSRR; 1.0µF remains the validated minimum for full spec compliance.
AP7370-12SA-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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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
AP7370-12SA-7 FAQ
1.How can I place an order for AP7370-12SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7370-12SA-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 AP7370-12SA-7 reliable?
The price and inventory of AP7370-12SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7370-12SA-7 is usually 5 days.
3.What payment methods are accepted for AP7370-12SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7370-12SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7370-12SA-7?
AP7370-12SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7370-12SA-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 AP7370-12SA-7?
For technical support, including AP7370-12SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7370-12SA-7 requirements.
6.How does Aetrix verify that AP7370-12SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7370-12SA-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 AP7370-12SA-7 meets industry standards.
7.What is the process for return or replacement of AP7370-12SA-7?
All AP7370-12SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7370-12SA-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 AP7370-12SA-7 part is unused and in its original packaging.
Return procedure for AP7370-12SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7370-12SA-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…
