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Analog Devices Inc. ADP2370ACPZ-R7
- Part No.:
- ADP2370ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2370ACPZ-R7.pdf
- Description:
- IC REG BUCK ADJ 800MA 8LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,978
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Product details
Overview
ADP2370ACPZ-R7 from Analog Devices is a high-efficiency, low-quiescent-current synchronous buck regulator delivering 800 mA output current with input voltage range 3.2 V to 15 V, fixed 3.3 V output, and 1.2 MHz/600 kHz selectable switching frequency. It features power-good indication, precision enable with hysteresis, and 100% duty cycle capability for ultra-low dropout operation in portable battery-powered systems.
For engineers reviewing the ADP2370ACPZ-R7 datasheet, ADP2370ACPZ-R7 pinout, ADP2370ACPZ-R7 application, or ADP2370ACPZ-R7 equivalent, key selection criteria include quiescent current <14 µA in PSM mode, ±1% initial output accuracy, forced PWM (FPWM) support via SYNC pin, and thermal performance enabled by its 3 mm × 3 mm LFCSP package with exposed ground pad.
Technical Context
The ADP2370ACPZ-R7 employs a proprietary high-speed current-mode, constant-frequency PWM control architecture optimized for stability and fast transient response. Its integrated P-channel and N-channel MOSFETs eliminate external rectifiers, while internal soft-start and compensation reduce external component count to just three passive parts.
It supports dual operating modes: power-saving variable-frequency PSM under light load and forced PWM for noise-sensitive applications. Frequency selection is implemented via FSEL pin (high = 1.2 MHz, low = 600 kHz) or synchronization to an external 400–800 kHz / 0.8–1.6 MHz clock on the SYNC pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.2 V to 15 V - supports multi-cell alkaline/NiMH, single/dual Li-ion, and industrial 5–12 V rails. |
| Output Current | 800 mA continuous - sufficient for powering microcontrollers, sensors, and RF transceivers in compact portable designs. |
| Quiescent Current | <14 µA in PSM mode - extends battery life in always-on, low-duty-cycle applications like AMR endpoints. |
| Switching Frequency | 600 kHz or 1.2 MHz (pin-selectable) - enables optimization of inductor size vs. efficiency and EMI profile. |
| Output Accuracy | ±1% initial tolerance - 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 timing and fault detection before downstream circuitry powers up. |
| Shutdown Current | <1.2 µA - minimizes battery drain during deep sleep or standby states in energy-harvested or coin-cell devices. |
Pinout & Package
ADP2370ACPZ-R7 is housed in an 8-lead, 0.75 mm × 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 and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Accepts 3.2–15 V supply; requires local 10 µF ceramic decoupling per datasheet recommendations. |
| FSEL (Pin 2) | Frequency Select | Logic-high sets 1.2 MHz; logic-low sets 600 kHz - enables layout-optimized frequency choice without external components. |
| EN (Pin 3) | Enable with Precision Threshold | Active-high with 1.135–1.26 V valid-high window - prevents false turn-on due to noise or slow-rising supplies. |
| SYNC (Pin 4) | Synchronization/FPWM Control | Drives FPWM mode when high; accepts external clock 400–800 kHz (FSEL = low) or 0.8–1.6 MHz (FSEL = high). |
| FB (Pin 5) | Feedback Input | Internally tied to 3.3 V output; not accessible - eliminates external resistor network for fixed-output variant. |
| PG (Pin 6) | Open-Drain Power-Good | Asserts low when VOUT falls below 92% of nominal; requires external pull-up for MCU reset or sequencing logic. |
| SW (Pin 7) | Switch Node | Connects to external inductor; carries high di/dt switching waveform - demands tight layout and minimal trace length. |
| PGND (Pin 8) | Power Ground | Separate return path for high-current switch node; must be joined to exposed pad and system ground at single point. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables regulation down to VIN − VDROP ≈ VOUT, critical for maintaining 3.3 V output as input drops to 3.3 V in single-cell Li-ion discharge. |
| Internal Soft Start | 350 µs controlled ramp - prevents inrush current and input voltage sag during startup across wide input and load ranges. |
| Thermal & Short-Circuit Protection | 150°C shutdown with 15°C hysteresis and cycle-by-cycle current limiting - ensures robustness in unattended or sealed industrial deployments. |
| Low EMI Synchronous Architecture | No external catch diode required; integrated MOSFETs with matched RDS(on) minimize conduction loss and switching noise. |
| Ultra-Low Shutdown Current | <1.2 µA over −40°C to +85°C - meets stringent leakage budgets for battery-backed real-time clocks and sensor wake-up circuits. |
Applications
| Portable Medical Sensors | Smart Metering Endpoints |
|---|---|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell with intermittent Bluetooth LE transmission. IC Role / Device Role / Timing Role: Primary 3.3 V power rail generator for analog front-end, MCU, and BLE radio; regulates down from 3.0–3.3 V battery range. Use Value: 14 µA quiescent current extends battery life beyond 12 months; 100% duty cycle maintains stable 3.3 V output even at end-of-life battery voltage. |
Use Scenario: Battery-backed automatic meter reading (AMR) node in water/gas meter with 10-year deployment requirement. IC Role / Device Role / Timing Role: Always-on 3.3 V supply for RTC, memory retention, and wake-up controller; operates from primary alkaline stack or backup supercap. Use Value: <1.2 µA shutdown current prevents measurable battery depletion during 99.9% sleep time; PG signal triggers data logging on power restoration. |
| POS Terminal Peripherals | Industrial Handheld Scanners |
Use Scenario: Compact barcode scanner module integrated into retail POS terminal with USB-powered 5 V input. IC Role / Device Role / Timing Role: Step-down converter generating clean 3.3 V for CMOS image sensor and decode ASIC from noisy 5 V USB bus. Use Value: Forced PWM mode (via SYNC pin) suppresses switching noise near sensitive analog imaging path; >90% efficiency minimizes thermal rise in sealed enclosure. |
Use Scenario: Ruggedized handheld RFID scanner using dual AA alkaline cells (3.0–3.6 V) and requiring 3.3 V for FPGA and UHF transceiver. IC Role / Device Role / Timing Role: Main DC-DC regulator supporting dynamic load steps from idle to active scan bursts up to 800 mA. Use Value: Fast transient response (<20 µs PG delay) and current-mode control maintain VOUT within ±3% during 100 mA → 800 mA load jumps; LFCSP package enables compact 53 mm² total solution size. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DLCR | Lower IQ (300 nA), 1.8–5.5 V input, 600 mA max, 1.8–5.5 V adjustable output; no fixed 3.3 V option. | Targeted at ultra-low-power IoT nodes where sub-µA quiescent current outweighs output current need. | Select if battery life >10 years is mandatory and load ≤600 mA; verify external feedback resistors needed for 3.3 V. |
| MP2451DT-LF-Z | 3.3–36 V input, 0.6–28 V adjustable output, 600 mA, 2 MHz fixed frequency, no PSM mode, higher IQ (~100 µA). | Suited for industrial 12/24 V systems needing wider VIN range and higher voltage outputs; less optimal for coin-cell use. | Choose for 12–24 V input designs where cost sensitivity dominates; accept reduced light-load efficiency and no PG output. |
Compared with TPS62840DLCR and MP2451DT-LF-Z, ADP2370ACPZ-R7 uniquely balances 800 mA output, fixed 3.3 V, <14 µA PSM IQ, and integrated PG in a 3 mm × 3 mm footprint - making it optimal for space-constrained, battery-powered 3.3 V systems requiring guaranteed power sequencing and long service life.
Availability
ADP2370ACPZ-R7 is available at Aetrix Electronics and suitable for portable medical sensors, smart metering endpoints, POS terminal peripherals, and industrial handheld scanners requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for ADP2370ACPZ-R7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design and manufacturing expertise spanning precision power, signal chain, and RF technologies.
The ADP2370ACPZ-R7 belongs to Analog Devices' ADP237x family of high-voltage, low-IQ buck regulators engineered specifically for battery-powered portable equipment where extended runtime, small solution size, and reliable power sequencing are critical.
FAQ
What is the output voltage configuration of the ADP2370ACPZ-R7?
The ADP2370ACPZ-R7 is a fixed-output variant configured for 3.3 V. Unlike the adjustable ADP2370 variants, it integrates internal feedback resistors - eliminating external components and ensuring ±1% initial accuracy without calibration. This simplifies design for standard 3.3 V logic and interface rails.
Does the ADP2370ACPZ-R7 support synchronization to an external clock?
Yes, the ADP2370ACPZ-R7 supports external clock synchronization via its SYNC pin. When FSEL is low, it accepts 400–800 kHz clocks; when FSEL is high, it accepts 0.8–1.6 MHz clocks. This allows precise EMI control and phase alignment in multi-rail systems - a capability confirmed in the Rev. E datasheet Section "Synchronizing".
How does the ADP2370ACPZ-R7 manage efficiency at light loads?
The ADP2370ACPZ-R7 uses a power-saving mode (PSM) that reduces switching frequency under light loads, achieving <14 µA quiescent current. This mode automatically engages below ~170 mA (at VIN = 7.2 V, VOUT = 3.3 V), significantly extending battery life in intermittently active applications without sacrificing regulation accuracy.
What thermal considerations apply to the ADP2370ACPZ-R7's LFCSP package?
The ADP2370ACPZ-R7's 3 mm × 3 mm LFCSP package has θJA = 36.7°C/W on a 4-layer board. Its exposed pad must be soldered to a solid ground plane to achieve rated thermal performance. Without proper pad connection, junction temperature rise increases substantially - risking thermal shutdown above ~400 mW dissipation at ambient.
Is the ADP2370ACPZ-R7 pin-compatible with the ADP2371 series?
No, the ADP2370ACPZ-R7 is not pin-compatible with ADP2371 variants. While both share identical pinout and package, the ADP2371 includes an integrated quick output discharge (QOD) function absent in ADP2370. Using ADP2371 in place of ADP2370ACPZ-R7 may cause unintended output discharge during shutdown unless QOD is disabled or accounted for in system design.
ADP2370ACPZ-R7 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-R7 FAQ
1.How can I place an order for ADP2370ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2370ACPZ-R7 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-R7 reliable?
The price and inventory of ADP2370ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2370ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP2370ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2370ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2370ACPZ-R7?
ADP2370ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2370ACPZ-R7 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-R7?
For technical support, including ADP2370ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2370ACPZ-R7 requirements.
6.How does Aetrix verify that ADP2370ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2370ACPZ-R7 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-R7 meets industry standards.
7.What is the process for return or replacement of ADP2370ACPZ-R7?
All ADP2370ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2370ACPZ-R7, 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-R7 part is unused and in its original packaging.
Return procedure for ADP2370ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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