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Analog Devices Inc. ADP2371ACPZ-1.2-R7
- Part No.:
- ADP2371ACPZ-1.2-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad, CSP
- Datasheet:
-
ADP2371ACPZ-1.2-R7.pdf
- Description:
- IC REG BUCK 1.2V 800MA 8LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,393
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Product details
Overview
ADP2371ACPZ-1.2-R7 from Analog Devices is a high-efficiency, low-quiescent-current 800 mA synchronous buck regulator with fixed 1.2 V output, 3.2 V to 15 V input range, and selectable 600 kHz/1.2 MHz switching frequency. It integrates quick output discharge (QOD), power-good indication, and operates in pulse-skipping mode for battery longevity in portable systems.
For engineers reviewing the ADP2371ACPZ-1.2-R7 datasheet, ADP2371ACPZ-1.2-R7 pinout, ADP2371ACPZ-1.2-R7 application, or ADP2371ACPZ-1.2-R7 equivalent, key selection criteria include its <14 µA quiescent current in PSM, ±1% initial output accuracy, 100% duty cycle capability, integrated QOD function, and 8-lead 3 mm × 3 mm LFCSP package optimized for space-constrained battery-powered designs.
Technical Context
The ADP2371ACPZ-1.2-R7 employs a proprietary high-speed current-mode PWM control architecture delivering excellent transient response and stability with only three external components. Its synchronous rectifier eliminates the need for an external diode, while the integrated switched resistor enables automatic output discharge during shutdown.
It supports dual-frequency operation via the FSEL pin (1.2 MHz high / 600 kHz low), offers forced PWM mode via SYNC, and includes precision enable thresholds (1.10–1.26 V logic-high), undervoltage lockout (3.19 V rising), and thermal shutdown at 150°C with 15°C hysteresis.
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 DC rails. |
| Output Voltage | Fixed 1.2 V ±1% initial accuracy - ensures stable core voltage for low-power MCUs and sensors. |
| Max Output Current | 800 mA - sufficient for powering SoCs, RF transceivers, and mixed-signal subsystems. |
| Quiescent Current | <14 µA in PSM - extends battery life in always-on, low-duty-cycle IoT endpoints. |
| Switching Frequency | Selectable 600 kHz or 1.2 MHz - balances EMI, inductor size, and efficiency per design constraints. |
| Package | 8-lead 3 mm × 3 mm LFCSP (QFN) with exposed pad - enables compact layout and efficient thermal dissipation. |
| QOD Function | Integrated switched resistor - discharges output automatically on disable, preventing backfeed or latch-up. |
Pinout & Package
ADP2371ACPZ-1.2-R7 is housed in an 8-lead, 0.75 mm profile, 3 mm × 3 mm LFCSP (QFN) package with an electrically grounded exposed pad requiring PCB thermal connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Accepts 3.2 V–15 V supply; decoupled with ≥10 µF ceramic capacitor near pin. |
| FSEL (Pin 2) | Frequency Select | Logic-high = 1.2 MHz, logic-low = 600 kHz; internal hysteresis prevents chatter. |
| EN (Pin 3) | Enable Input | Precision threshold (1.10–1.26 V); enables regulator only when VIN exceeds UVLO (3.19 V). |
| SYNC (Pin 4) | Synchronization Control | Forces FPWM mode when high; enables external clock sync (400–800 kHz or 0.8–1.6 MHz). |
| FB (Pin 5) | Feedback Input | Not used for fixed-output variants like ADP2371ACPZ-1.2-R7; internally tied to 1.2 V reference. |
| PG (Pin 6) | Power-Good Output | Open-drain signal asserting when VOUT ≥92% of nominal (1.104 V); 20 µs delay on rise. |
| SW (Pin 7) | Switch Node | Connects to external inductor; carries high dv/dt switching waveform; requires tight loop layout. |
| PGND (Pin 8) | Power Ground | High-current return path for internal MOSFETs; must be connected to solid ground plane under EPAD. |
Key Features
| Feature | Design Value |
|---|---|
| Quick Output Discharge (QOD) | Integrated 260–400 Ω pull-down resistor discharges VOUT within milliseconds upon EN deassertion. |
| 100% Duty Cycle Operation | Maintains regulation down to VOUT ≈ VIN − 0.3 V - critical for low-dropout battery backup scenarios. |
| Low Shutdown Current | <1.2 µA - minimizes battery drain during deep sleep or system standby modes. |
| Internal Soft Start | 350 µs monotonic ramp - prevents inrush current and input voltage sag at startup. |
| Thermal & Short-Circuit Protection | Auto-recovery thermal shutdown at 150°C; cycle-by-cycle current limiting protects against overload/fault. |
Applications
| Portable Medical Sensors | Smart Metering Nodes |
|---|---|
Use Scenario: Wearable ECG patch operating from two AAA batteries with multi-year shelf life requirement. IC Role / Device Role / Timing Role: Primary 1.2 V core supply for ultra-low-power MCU and analog front-end. Use Value: <14 µA quiescent current in PSM extends battery life; QOD prevents sensor bias drift during power cycling. | Use Scenario: Battery-backed automatic meter reading (AMR) node in utility infrastructure with intermittent RF transmission. IC Role / Device Role / Timing Role: Regulates 1.2 V rail for microcontroller and sub-GHz transceiver during burst transmit/receive cycles. Use Value: 800 mA peak current supports RF PA activation; 100% duty cycle sustains output during brownout conditions. |
| Handheld Diagnostic Tools | Industrial Edge Controllers |
Use Scenario: Portable ultrasound probe powered by Li-ion pack, requiring clean, stable 1.2 V for ADC and FPGA logic. IC Role / Device Role / Timing Role: High-efficiency step-down converter with low noise and fast load transient response. Use Value: >90% efficiency at 250 mA reduces thermal load; PG signal validates rail integrity before data acquisition. | Use Scenario: DIN-rail mounted controller with wide-input industrial supply (12–24 V) powering 1.2 V FPGA configuration logic. IC Role / Device Role / Timing Role: Compact, robust DC-DC stage tolerant to input ripple and temperature extremes (−40°C to +85°C). Use Value: −40°C to +125°C junction rating and 36.7°C/W θJA ensure reliability; UVLO prevents deep battery discharge in backup mode. |
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 (300 nA in shutdown, 250 nA in DCM), 1.8–5.5 V input, 800 mA, fixed 1.2 V; smaller 1.2 mm × 0.8 mm WSON. | Better suited for coin-cell or energy-harvesting systems where nanoamp shutdown is mandatory. | Choose TPS62840DRVR if sub-µA shutdown current is required and input voltage stays below 5.5 V. |
| MAX17552ATC+ | Wider input (4.5–60 V), higher current (1 A), adjustable output, no integrated QOD; 12-pin TDFN. | Designed for harsh industrial environments with high-voltage transients and extended temperature range. | Choose MAX17552ATC+ for 24 V or 48 V bus regulation where input exceeds 15 V and QOD is implemented externally. |
Compared with TPS62840DRVR and MAX17552ATC+, the ADP2371ACPZ-1.2-R7 uniquely combines 3.2–15 V input flexibility, integrated QOD, and precision 1.2 V output in a thermally enhanced 3 mm × 3 mm LFCSP-making it optimal for mid-range battery-powered systems demanding both efficiency and controlled shutdown behavior.
Availability
ADP2371ACPZ-1.2-R7 is available at Aetrix Electronics and suitable for portable medical sensors, smart metering nodes, and handheld diagnostic tools requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ADP2371ACPZ-1.2-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.
The ADP2370/ADP2371 product line was designed specifically for space- and power-constrained portable and battery-operated equipment, emphasizing ultra-low quiescent current, small solution size, and robust protection features.
FAQ
What is the maximum input voltage rating for the ADP2371ACPZ-1.2-R7?
The ADP2371ACPZ-1.2-R7 has an absolute maximum input voltage rating of +17 V relative to PGND, but its recommended operating input range is 3.2 V to 15 V. Exceeding 15 V may trigger overvoltage stress or reduce reliability, even if within absolute limits. Always observe the 15 V operational ceiling specified in the datasheet for sustained performance.
Does the ADP2371ACPZ-1.2-R7 require external feedback resistors?
No, the ADP2371ACPZ-1.2-R7 does not require external feedback resistors because it is a fixed-output variant with an internally trimmed 1.2 V reference. Pin 5 (FB) is not connected externally and must remain unpopulated or left floating per the datasheet - unlike adjustable versions such as ADP2371ACPZ-R7.
How does the Quick Output Discharge (QOD) function operate in the ADP2371ACPZ-1.2-R7?
The ADP2371ACPZ-1.2-R7 integrates a dedicated 260–400 Ω switched resistor between VOUT and PGND that activates automatically when the EN pin is pulled low. This discharges the output capacitor rapidly - typically within a few milliseconds - eliminating residual voltage that could cause backfeed, latch-up, or sequencing issues in multi-rail systems.
Can the ADP2371ACPZ-1.2-R7 synchronize to an external clock?
Yes, the ADP2371ACPZ-1.2-R7 supports external clock synchronization via the SYNC pin. When FSEL is set low, it accepts 400–800 kHz clocks; when FSEL is high, it accepts 0.8–1.6 MHz clocks. The SYNC pin also forces FPWM mode when held high, overriding PSM for noise-sensitive applications.
What thermal considerations apply to the ADP2371ACPZ-1.2-R7 in continuous 800 mA operation?
In continuous 800 mA operation at full load and worst-case ambient, the ADP2371ACPZ-1.2-R7's junction temperature must stay ≤125°C. With θJA = 36.7°C/W, a 1 W power dissipation would raise TJ by ~37°C above TA. Proper PCB layout - including full EPAD soldering to a ≥2 cm² ground plane and thermal vias - is essential to maintain safe thermal margins.
ADP2371ACPZ-1.2-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):
- 1.2V
- 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)
ADP2371ACPZ-1.2-R7 FAQ
1.How can I place an order for ADP2371ACPZ-1.2-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2371ACPZ-1.2-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 ADP2371ACPZ-1.2-R7 reliable?
The price and inventory of ADP2371ACPZ-1.2-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2371ACPZ-1.2-R7 is usually 5 days.
3.What payment methods are accepted for ADP2371ACPZ-1.2-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2371ACPZ-1.2-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2371ACPZ-1.2-R7?
ADP2371ACPZ-1.2-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2371ACPZ-1.2-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 ADP2371ACPZ-1.2-R7?
For technical support, including ADP2371ACPZ-1.2-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2371ACPZ-1.2-R7 requirements.
6.How does Aetrix verify that ADP2371ACPZ-1.2-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2371ACPZ-1.2-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 ADP2371ACPZ-1.2-R7 meets industry standards.
7.What is the process for return or replacement of ADP2371ACPZ-1.2-R7?
All ADP2371ACPZ-1.2-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2371ACPZ-1.2-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 ADP2371ACPZ-1.2-R7 part is unused and in its original packaging.
Return procedure for ADP2371ACPZ-1.2-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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