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Analog Devices Inc. ADP2370ACPZ-1.8-R7
- Part No.:
- ADP2370ACPZ-1.8-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2370ACPZ-1.8-R7.pdf
- Description:
- IC REG BUCK 1.8V 800MA 8LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,295
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Product details
Overview
ADP2370ACPZ-1.8-R7 from Analog Devices is a high-efficiency, low-quiescent-current 800 mA synchronous buck regulator with fixed 1.8 V output, 3.2 V to 15 V input range, and selectable 600 kHz/1.2 MHz switching frequency. It features power-good indication, precision enable, and 100% duty-cycle capability for ultra-low dropout operation in battery-powered systems.
For engineers reviewing the ADP2370ACPZ-1.8-R7 datasheet, ADP2370ACPZ-1.8-R7 pinout, ADP2370ACPZ-1.8-R7 application, or ADP2370ACPZ-1.8-R7 equivalent, key selection criteria include quiescent current (<14 µA in PSM), ±1% initial output accuracy, thermal performance in the 3 mm × 3 mm LFCSP package, and compatibility with compact 53 mm² total solution size using only three external components.
Technical Context
The ADP2370ACPZ-1.8-R7 employs a proprietary high-speed current-mode PWM control architecture with internal compensation and soft start, enabling excellent transient response and stability without external loop components. Its synchronous rectifier eliminates the need for an external Schottky diode, reducing conduction losses and board area.
It supports dual operating modes: forced PWM (FPWM) for noise-sensitive applications and power-saving mode (PSM) that reduces switching frequency under light load to maintain >90% efficiency across wide load ranges. The FSEL pin selects between 600 kHz and 1.2 MHz, while SYNC enables synchronization to an external clock or forces FPWM operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8 V ±1% initial accuracy ensures stable core supply for low-voltage microcontrollers and sensors. |
| Input voltage range | 3.2 V to 15 V supports single/dual lithium cells, multi-alkaline/NiMH batteries, and industrial 5–12 V rails. |
| Max output current | 800 mA continuous output enables powering SoCs, RF modules, and display drivers in portable devices. |
| Quiescent current | <14 µA in PSM extends battery life in always-on WSN and metering applications with intermittent activity. |
| Switching frequency | Selectable 600 kHz or 1.2 MHz via FSEL pin - higher frequency allows smaller inductors; lower frequency improves light-load efficiency. |
| Package | 8-lead 3 mm × 3 mm × 0.75 mm LFCSP with exposed thermal pad - requires PCB ground plane connection for θJA = 36.7°C/W thermal performance. |
| Power-good threshold | 92% nominal (1.656 V) rising edge with 5% hysteresis provides reliable system reset signaling during brownout conditions. |
Pinout & Package
ADP2370ACPZ-1.8-R7 uses an 8-lead, 3 mm × 3 mm × 0.75 mm lead frame chip scale package (LFCSP) with exposed thermal pad electrically connected to PGND. The exposed pad must be soldered to a dedicated PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 3.2 V–15 V input; decoupled with ≥10 µF ceramic capacitor near pin to suppress high-frequency noise. |
| FSEL (Pin 2) | Frequency select | Logic-high sets 1.2 MHz; logic-low sets 600 kHz - enables optimization of efficiency vs. EMI vs. component size. |
| EN (Pin 3) | Enable with precision threshold | Active-high enable with 1.135–1.26 V logic-high threshold; supports controlled sequencing in multi-rail systems. |
| SYNC (Pin 4) | Synchronization/FPWM control | Drives high to force PWM mode; driven by external 600 kHz–1.2 MHz clock for EMI reduction or timing alignment. |
| FB (Pin 5) | Feedback | Internally tied to 1.8 V output - not accessible; unused in fixed-output variants like ADP2370ACPZ-1.8-R7. |
| PG (Pin 6) | Power-good open-drain output | Asserts low when VOUT drops below 92% of 1.8 V; requires external pull-up for MCU reset or status monitoring. |
| SW (Pin 7) | Switch node | Connects internal P/N-channel 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 VOUT = VIN − dropout, supporting ultra-low-input scenarios such as single-cell Li-ion (3.0 V min) powering 1.8 V loads. |
| Integrated soft start | 350 µs internal ramp prevents inrush current and input overvoltage during startup - no external capacitor required. |
| Low shutdown current | <1.2 µA shutdown leakage minimizes battery drain in standby mode for long-life IoT endpoints and medical wearables. |
| Thermal and short-circuit protection | 150°C thermal shutdown with 15°C hysteresis and cycle-by-cycle current limiting prevent damage during overload or poor heatsinking. |
| Undervoltage lockout (UVLO) | 3.19 V rising / 2.80 V falling thresholds prevent deep battery discharge and ensure clean startup from weak sources. |
Applications
| Portable Medical Sensors | Smart Metering Nodes |
|---|---|
|
Use Scenario: Continuous glucose monitor with Bluetooth LE radio and low-power ADC sampling every 5 minutes. IC Role / Device Role / Timing Role: Primary 1.8 V supply for sensor front-end and BLE SoC, regulated from coin-cell or rechargeable Li-ion. Use Value: <14 µA quiescent current extends battery life beyond 2 years; 100% duty cycle maintains regulation down to 2.0 V input during end-of-life battery discharge. |
Use Scenario: Battery-backed automatic meter reading (AMR) node in water/gas meters, transmitting hourly via sub-GHz RF. IC Role / Device Role / Timing Role: Efficient 1.8 V rail for microcontroller, RF transceiver, and real-time clock during active transmission and sleep cycles. Use Value: >90% efficiency at 10–100 mA loads preserves battery capacity; PG output triggers firmware watchdog reset on undervoltage events. |
| Handheld POS Terminals | Industrial Tablet Displays |
|
Use Scenario: Compact point-of-sale terminal with capacitive touchscreen, barcode scanner, and secure element. IC Role / Device Role / Timing Role: Secondary 1.8 V supply for touch controller and secure IC, derived from main 3.3 V or 5 V rail. Use Value: 600 kHz/1.2 MHz frequency selection balances EMI compliance with inductor size constraints in space-constrained enclosures. |
Use Scenario: Ruggedized 7-inch industrial tablet with ARM Cortex-A processor, LCD backlight driver, and CAN interface. IC Role / Device Role / Timing Role: Dedicated 1.8 V core supply for memory interface and GPU subsystem, isolated from noisy digital rails. Use Value: Synchronous rectification and internal compensation reduce BOM count to just one inductor and two capacitors - simplifying layout and qualification. |
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 (0.36 µA), same 1.8 V fixed output, but max 600 mA output and 2.7–6.5 V input range - narrower VIN support. | Optimized for ultra-low-power IoT sensors; unsuitable for 12 V industrial inputs or 800 mA loads. | Select if battery life is paramount and input voltage never exceeds 6.5 V; verify thermal margin at full load. |
| MAX17503ATJ+ | Higher current (1.2 A), wider VIN (4.5–60 V), adjustable output - requires external feedback resistors and compensation. | Targets industrial 24 V systems; lacks integrated PG and precision enable; larger solution size due to external components. | Choose for high-VIN applications or when adjustable output is needed; expect longer design cycle due to loop tuning. |
Compared with TPS62840DLCR and MAX17503ATJ+, the ADP2370ACPZ-1.8-R7 uniquely balances 800 mA capability, 3.2–15 V flexibility, <14 µA quiescent current, and minimal external part count - making it optimal for mid-power portable equipment where input range and integration are critical.
Availability
ADP2370ACPZ-1.8-R7 is available at Aetrix Electronics and suitable for portable medical instruments, smart metering nodes, handheld POS terminals, and industrial display tablets requiring stable component supply, long-lifecycle availability, and consistent parametric performance.
Supply support for ADP2370ACPZ-1.8-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, serving industrial, automotive, communications, and healthcare markets.
The ADP2370 series was designed specifically for space- and power-constrained portable electronics, delivering high efficiency and ultra-low quiescent current in a thermally enhanced LFCSP package without sacrificing ease of use.
FAQ
What is the maximum input voltage rating for the ADP2370ACPZ-1.8-R7?
The ADP2370ACPZ-1.8-R7 has an absolute maximum input voltage of +17 V relative to PGND, but its recommended operating input range is 3.2 V to 15 V. Operation above 15 V may compromise reliability or violate safety margins defined in the datasheet's Absolute Maximum Ratings table. Always maintain input within 3.2–15 V for guaranteed performance and lifetime.
Does the ADP2370ACPZ-1.8-R7 require external compensation components?
No, the ADP2370ACPZ-1.8-R7 includes internal compensation circuitry optimized for its current-mode control architecture. This eliminates the need for external compensation networks, simplifying design and reducing bill-of-materials cost. Only three external components - input capacitor, output capacitor, and inductor - are required for full operation.
Can the ADP2370ACPZ-1.8-R7 operate with 100% duty cycle, and what does that enable?
Yes, the ADP2370ACPZ-1.8-R7 supports true 100% duty cycle operation, allowing VOUT to track VIN down to VOUT + dropout voltage. This enables regulation from inputs as low as ~2.0 V, critical for maintaining system operation during deep battery discharge in single-cell Li-ion or alkaline applications - a key advantage over regulators with minimum off-time limitations.
How does the power-good (PG) pin function on the ADP2370ACPZ-1.8-R7?
The PG pin on the ADP2370ACPZ-1.8-R7 is an open-drain output that pulls low when VOUT falls below 92% of its nominal 1.8 V value (i.e., <1.656 V). It includes 5% hysteresis to prevent chatter during marginal conditions. An external pull-up resistor is required to interface with MCU reset or status monitoring circuits.
Is the ADP2370ACPZ-1.8-R7 pin-compatible with the ADP2371 series?
The ADP2370ACPZ-1.8-R7 and ADP2371 share identical pinout, package, and electrical specifications except that the ADP2371 integrates a quick output discharge (QOD) function. No PCB changes are required to substitute ADP2370ACPZ-1.8-R7 for ADP2371, but QOD functionality will be unavailable unless externally implemented.
ADP2370ACPZ-1.8-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.2V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- 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-1.8-R7 FAQ
1.How can I place an order for ADP2370ACPZ-1.8-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2370ACPZ-1.8-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-1.8-R7 reliable?
The price and inventory of ADP2370ACPZ-1.8-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-1.8-R7 is usually 5 days.
3.What payment methods are accepted for ADP2370ACPZ-1.8-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2370ACPZ-1.8-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2370ACPZ-1.8-R7?
ADP2370ACPZ-1.8-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2370ACPZ-1.8-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-1.8-R7?
For technical support, including ADP2370ACPZ-1.8-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2370ACPZ-1.8-R7 requirements.
6.How does Aetrix verify that ADP2370ACPZ-1.8-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2370ACPZ-1.8-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-1.8-R7 meets industry standards.
7.What is the process for return or replacement of ADP2370ACPZ-1.8-R7?
All ADP2370ACPZ-1.8-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2370ACPZ-1.8-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-1.8-R7 part is unused and in its original packaging.
Return procedure for ADP2370ACPZ-1.8-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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