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Analog Devices Inc. ADP2370ACPZ-R2
- Part No.:
- ADP2370ACPZ-R2
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2370ACPZ-R2.pdf
- Description:
- IC REG BUCK ADJ 800MA 8LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
ADP2370ACPZ-R2 from Analog Devices is a high-efficiency, low-quiescent-current 800 mA synchronous buck regulator in an 8-lead 3 mm × 3 mm LFCSP package. It operates from 3.2 V to 15 V input, delivers fixed 3.3 V output (per R2 suffix), achieves >90% efficiency at 250 mA, and features 1.2 MHz/600 kHz selectable switching frequency with power-good indication - ideal for battery-powered medical instruments and portable WSN nodes.
For engineers reviewing the ADP2370ACPZ-R2 datasheet, ADP2370ACPZ-R2 pinout, ADP2370ACPZ-R2 application, or ADP2370ACPZ-R2 equivalent, key selection considerations include its 14 µA PSM quiescent current, ±1% initial output accuracy, 100% duty cycle capability, and FSEL/SYNC-controlled frequency and mode selection under light-load and noise-sensitive conditions.
Technical Context
The ADP2370ACPZ-R2 uses a proprietary high-speed current-mode PWM control architecture with internal compensation and soft start, enabling stable regulation and fast transient response with only three external components. Its synchronous rectifier eliminates the need for an external diode, reducing conduction losses and improving efficiency across load range.
It supports dual operating modes: power-saving variable-frequency PSM below ~170 mA load and forced PWM (FPWM) via SYNC pin for consistent EMI profile. The device integrates undervoltage lockout (UVLO), thermal shutdown (150°C), short-circuit protection, and precision enable with 100 mV hysteresis - all optimized for single-cell Li-ion and multi-cell alkaline/NiMH supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.2 V to 15 V - supports single Li-ion (3.0–4.2 V), two alkaline/NiMH (2.4–3.6 V), or 5 V/12 V system rails without pre-regulation. |
| Output Current | 800 mA continuous - sufficient for powering microcontrollers, sensors, and RF transceivers in compact portable systems. |
| Quiescent Current (PSM) | <14 µA - extends battery life in always-on, low-duty-cycle applications like automatic meter readers. |
| Switching Frequency | Selectable 600 kHz or 1.2 MHz via FSEL pin - enables trade-off between inductor size (higher fSW → smaller L) and efficiency (lower fSW → lower switching loss). |
| Output Accuracy | ±1% initial tolerance at 25°C - ensures reliable logic-level compliance for 3.3 V I/O domains without post-regulation trimming. |
| Power-Good Threshold | Rising edge at 92% of nominal output - provides precise system reset or supervisor signaling before voltage collapse. |
| Shutdown Current | <1.2 µA - minimizes battery drain during deep sleep or storage modes. |
Pinout & Package
ADP2370ACPZ-R2 is housed in an 8-lead, 0.75 mm height, 3 mm × 3 mm LFCSP (QFN) package with exposed thermal pad electrically connected to PGND. The pad must be soldered to a PCB ground plane for thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Accepts 3.2–15 V input; requires local 10 µF ceramic decoupling close to pin for stability and EMI suppression. |
| FSEL (Pin 2) | Frequency Select | Logic-high = 1.2 MHz, logic-low = 600 kHz; hysteresis ensures noise immunity during mode transitions. |
| EN (Pin 3) | Enable with Precision Threshold | Active-high enable with 1.1–1.2 V valid-high window; supports direct connection to MCU GPIO or battery monitor outputs. |
| SYNC (Pin 4) | Synchronization / FPWM Control | Drives FPWM mode when pulled high; accepts external 400–800 kHz (FSEL = low) or 0.8–1.6 MHz (FSEL = high) clock for EMI reduction. |
| FB (Pin 5) | Feedback Input | Monitors output via resistor divider (for adjustable versions); not used in fixed-output ADP2370ACPZ-R2 (internally tied to 3.3 V reference). |
| PG (Pin 6) | Open-Drain Power-Good | Asserts low when VOUT drops below 92% of nominal; requires external pull-up for host processor reset or status monitoring. |
| SW (Pin 7) | Switch Node | Connects internal P/N MOSFETs to external inductor; high dv/dt node requiring tight layout and minimal trace length. |
| PGND (Pin 8) | Power Ground | High-current return path for switch and output capacitor; must be separated from AGND and tied to exposed pad. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables dropout operation down to VIN ≈ VOUT + 0.1 V - critical for maintaining regulation as battery discharges near end-of-life. |
| Integrated Soft Start | 350 µs controlled ramp prevents inrush current and input voltage sag during startup - eliminates need for external timing components. |
| Synchronous Rectification | Eliminates external Schottky diode; reduces conduction loss and improves full-load efficiency by up to 8% vs. asynchronous designs. |
| Low Shutdown Current | <1.2 µA shutdown leakage - preserves battery charge over months of storage in IoT endpoint devices. |
| Thermal & Short-Circuit Protection | Auto-recovery thermal shutdown at 150°C and cycle-by-cycle current limiting prevent damage during overload or poor heatsinking. |
Applications
| Portable Medical Sensors | Wireless Sensor Nodes (WSN) |
|---|---|
Use Scenario: Continuous glucose monitors and wearable ECG patches powered by coin-cell or LiPo batteries. IC Role / Device Role: Primary 3.3 V power rail generator with ultra-low IQ to maximize sensor uptime between charges. Use Value: 14 µA quiescent current extends 200 mAh battery life to >2 years in sleep-dominated operation. |
Use Scenario: Battery-operated environmental sensors transmitting data via BLE or LoRaWAN every 5–60 minutes. IC Role / Device Role: Efficient step-down converter supplying MCU, radio, and analog front-end from 2×AA or Li-ion sources. Use Value: 92% peak efficiency at 250 mA and PSM mode reduce average power draw by 3.5× vs. linear regulators. |
| Point-of-Sale Terminals | Medium-Format Display Tablets |
Use Scenario: Handheld credit card readers with integrated NFC and barcode scanner requiring clean, regulated 3.3 V rails. IC Role / Device Role: Main DC-DC converter delivering 800 mA with low noise and fast transient response for mixed-signal subsystems. Use Value: 1.2 MHz switching allows use of 1.0 µH inductors, shrinking solution size to <53 mm² - critical for slim form factors. |
Use Scenario: Industrial tablets with resistive/capacitive touchscreens and ARM Cortex-A processors running Linux. IC Role / Device Role: Core power supply for SoC I/O, display interface, and peripheral controllers from 5 V or 12 V adapter input. Use Value: Power-good output enables safe boot sequencing and brown-out detection before firmware initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DRVR | Lower IQ (0.075 µA), same 800 mA rating, but max input 5.5 V - unsuitable for 12 V or multi-cell inputs. | Optimized for ultra-low-power sub-1 V MCU cores; lacks PG output and 100% duty cycle. | Choose TPS62840DRVR only for single Li-ion systems where minimum IQ dominates design priority. |
| MP2451DT-LF-Z | Higher IQ (45 µA), 0.6–17 V input, no PSM mode, no PG output, 2 MHz fixed frequency. | Better suited for cost-sensitive industrial controls with AC/DC input; less optimal for battery longevity. | Choose MP2451DT-LF-Z when board space is constrained and 2 MHz operation simplifies EMI filtering - but expect ~3× higher standby drain. |
Compared with TPS62840DRVR and MP2451DT-LF-Z, ADP2370ACPZ-R2 uniquely balances wide-input capability (3.2–15 V), ultra-low PSM IQ (<14 µA), integrated PG, and 100% duty cycle - making it the only option among the three viable for long-life, multi-source portable equipment.
Availability
ADP2370ACPZ-R2 is available at Aetrix Electronics and suitable for portable medical sensors, wireless sensor networks, and point-of-sale terminals requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for ADP2370ACPZ-R2 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADP2370ACPZ-R2 belongs to Analog Devices' high-efficiency, low-IQ buck regulator product line designed specifically for battery-constrained portable and IoT applications demanding extended runtime and small solution footprint.
FAQ
What output voltage does the ADP2370ACPZ-R2 deliver?
The ADP2370ACPZ-R2 is a fixed-output variant delivering 3.3 V with ±1% initial accuracy at 25°C. Its feedback node (FB) is internally connected to the 3.3 V reference, eliminating external resistor dividers. Output remains stable across −40°C to +125°C junction temperature and load currents from zero to 800 mA.
How does the ADP2370ACPZ-R2 achieve ultra-low quiescent current?
The ADP2370ACPZ-R2 achieves <14 µA quiescent current in power-saving mode (PSM) by dynamically reducing switching frequency under light loads while maintaining regulation. This behavior is automatic unless overridden by the SYNC pin. In contrast, forced PWM mode draws ~725 µA - selected only when strict EMI control is required.
Can the ADP2370ACPZ-R2 operate with a 2.5 V input?
No. The ADP2370ACPZ-R2 has a minimum input voltage of 3.2 V, enforced by internal undervoltage lockout (UVLO) that disables operation below 3.19 V rising threshold. Attempting to operate below this risks unregulated output or latch-up. For sub-3.2 V inputs, consider the ADP2371 series with QOD or alternative low-VIN regulators.
What is the purpose of the exposed pad on the ADP2370ACPZ-R2 package?
The exposed pad on the ADP2370ACPZ-R2 is electrically connected to PGND and serves dual roles: thermal dissipation (θJA = 36.7°C/W) and low-impedance power ground return. It must be soldered to a dedicated PCB ground plane using ≥4 thermal vias - failure to do so degrades efficiency, increases junction temperature, and may trigger thermal shutdown under load.
Does the ADP2370ACPZ-R2 support synchronization to an external clock?
Yes. The ADP2370ACPZ-R2 supports external clock synchronization via the SYNC pin across two ranges: 400–800 kHz when FSEL = low, and 0.8–1.6 MHz when FSEL = high. The device locks to the external clock's rising edge and maintains phase coherence - essential for reducing beat frequencies in multi-rail systems.
ADP2370ACPZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.2V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 14V
- Current - Output:
- 800mA
- Frequency - Switching:
- 600kHz ~ 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-LFCSP-WD (3x3)
ADP2370ACPZ-R2 FAQ
1.How can I place an order for ADP2370ACPZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2370ACPZ-R2 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 ADP2370ACPZ-R2 reliable?
The price and inventory of ADP2370ACPZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2370ACPZ-R2 is usually 5 days.
3.What payment methods are accepted for ADP2370ACPZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2370ACPZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2370ACPZ-R2?
ADP2370ACPZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2370ACPZ-R2 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 ADP2370ACPZ-R2?
For technical support, including ADP2370ACPZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2370ACPZ-R2 requirements.
6.How does Aetrix verify that ADP2370ACPZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADP2370ACPZ-R2 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 ADP2370ACPZ-R2 meets industry standards.
7.What is the process for return or replacement of ADP2370ACPZ-R2?
All ADP2370ACPZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2370ACPZ-R2, 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 ADP2370ACPZ-R2 part is unused and in its original packaging.
Return procedure for ADP2370ACPZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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