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Analog Devices Inc. ADP5303ACBZ-2-R7
- Part No.:
- ADP5303ACBZ-2-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 9-WFBGA, WLCSP
- Datasheet:
-
ADP5303ACBZ-2-R7.pdf
- Description:
- IC REG BCK PRG 50MA/500MA 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:7,268
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Product details
Overview
ADP5303ACBZ-2-R7 from Analog Devices is an ultralow-power, dual-mode step-down regulator with integrated battery voltage monitor (VINOK), designed for keep-alive and ultra-low-quiescent-current power management in battery-powered systems. It delivers up to 50 mA in hysteresis mode (240 nA IQ) or 500 mA in PWM mode (630 µA IQ), supports 2.15 V–6.50 V input, and offers factory- or resistor-programmable output from 0.8 V to 5.0 V in a 9-ball WLCSP package.
For engineers reviewing the ADP5303ACBZ-2-R7 datasheet, ADP5303ACBZ-2-R7 pinout, ADP5303ACBZ-2-R7 application, or ADP5303ACBZ-2-R7 equivalent, this page provides verified technical context, mode-specific current/efficiency trade-offs, VINOK threshold programmability, SYNC/MODE pin behavior, and real-world design implications of hysteresis vs. PWM operation - all critical for energy metering, medical wearables, and long-life IoT sensor nodes.
Technical Context
The ADP5303ACBZ-2-R7 implements a synchronous buck topology with two distinct operational modes controlled by the SYNC/MODE pin: hysteresis mode enables 240 nA quiescent current and 50 mA output with large ripple, while PWM mode delivers 500 mA output, 2 MHz fixed switching (synchronizable 1.5–2.5 MHz), and ±1.5% output accuracy over temperature. Its internal 0.808 V feedback reference and high-impedance FB divider preserve ultralow IQ.
It integrates a factory-programmable VINOK comparator (threshold range 2.05 V–5.15 V, ±3% accuracy), UVLO (2.06 V rising), thermal shutdown (142°C), OCP (1000 mA typical in PWM), and quick output discharge. The 9-ball WLCSP (1.65 mm × 1.87 mm) supports −40°C to +125°C junction operation with 132°C/W θJA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.15 V to 6.50 V - supports single Li-ion, dual alkaline/NiMH, or wide-input industrial rails without pre-regulation. |
| Quiescent Current (HYS) | 240 nA typical - enables >10-year battery life in always-on keep-alive applications at zero load. |
| Output Current (PWM) | Up to 500 mA - sufficient to power microcontrollers, RF transceivers, or sensors during active bursts. |
| Switching Frequency | 2 MHz (PWM), synchronizable 1.5–2.5 MHz - allows compact 2.2 µH inductors and minimizes EMI in noise-sensitive systems. |
| VINOK Threshold Accuracy | ±3% over −40°C to +125°C - ensures reliable low-battery detection across automotive and industrial temperature ranges. |
| Output Voltage Range | 0.8 V to 5.0 V - selectable via VID resistor or factory fuse, covering core logic, I/O, and analog supply requirements. |
| Protection Features | UVLO, OCP, TSD, and frequency foldback on short-circuit - eliminates need for external fault-handling circuitry. |
Pinout & Package
ADP5303ACBZ-2-R7 is housed in a 9-ball, 1.65 mm × 1.87 mm wafer-level chip-scale package (WLCSP) rated for −40°C to +125°C junction temperature, optimized for space-constrained portable and metering applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Connects to external inductor; carries high di/dt PWM/hysteresis current; requires tight layout to minimize EMI. |
| PVIN | Main power input | Accepts 2.15–6.50 V; supplies internal bias and power switches; must be decoupled near package. |
| EN | Enable control | Logic-high enables regulation; logic-low disables device into 18 nA shutdown state; no pull-up required. |
| PGND | Power ground | High-current return path for SW and internal FETs; must be separated from AGND and tied at single point. |
| AGND | Analog ground | Reference for FB, VID, VINOK, and internal comparators; connects to clean ground plane under IC. |
| SYNC/MODE | Mode selection & sync input | Logic low = hysteresis mode; logic high = PWM mode; also accepts 1.5–2.5 MHz external clock for EMI reduction. |
| VINOK | Open-drain battery OK flag | Asserts low when PVIN falls below factory-programmed threshold; requires external pull-up for system monitoring. |
| FB | Feedback input | Internally connected to output; no external resistor divider needed - simplifies layout and preserves IQ. |
| VID | Voltage ID configuration | Resistor-to-AGND selects output voltage (e.g., 11.8 kΩ = 1.2 V); short to PVIN selects factory-fixed option. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode regulation (HYS/PWM) | Enables dynamic power-state adaptation: hysteresis for multi-year standby, PWM for high-current active periods - no firmware or external control needed. |
| Integrated VINOK monitor | Factory-programmable threshold (2.05–5.15 V) with ±3% accuracy eliminates external voltage supervisor IC and reduces BOM count. |
| Ultralow 240 nA quiescent current | Extends battery life in gas/water meters and wearable medical devices where load current is often <10 µA for >99% of operating time. |
| 100% duty cycle operation | Maintains regulation as input drops near output voltage - prevents brownout during battery discharge without external LDO fallback. |
| Quick output discharge (QOD) | Internal 290 Ω discharge switch safely bleeds output capacitance after shutdown - meets safety requirements for medical and industrial systems. |
Applications
| Energy Metering | Portable Medical Sensors |
|---|---|
|
Use Scenario: Gas/water meter MCU and RTC remain powered for 10+ years on primary lithium battery. IC Role / Device Role / Timing Role: Keep-alive buck regulator supplying 3.3 V to microcontroller and real-time clock in hysteresis mode. Use Value: 240 nA IQ enables >12-year battery life at 1 µA average system load; VINOK flag triggers data upload before battery depletion. |
Use Scenario: Wearable ECG patch operates intermittently, requiring low-noise power during signal acquisition. IC Role / Device Role / Timing Role: Dual-mode regulator supplying 1.8 V to ADC and 3.3 V to BLE radio - hysteresis during sleep, PWM during transmission. Use Value: Seamless mode transition avoids software intervention; 2 MHz PWM minimizes output ripple (<5 mVpp) during analog sampling. |
| Industrial IoT Node | Low-Power Remote Monitor |
|
Use Scenario: Battery-powered vibration sensor transmits data hourly via LoRaWAN, sleeping otherwise. IC Role / Device Role / Timing Role: Primary power source for ARM Cortex-M0+ MCU, MEMS accelerometer, and RF front-end. Use Value: 500 mA PWM output powers RF burst without voltage sag; QOD ensures safe reset between cycles per IEC 62368-1. |
Use Scenario: Environmental sensor in remote location uses coin cell for 5+ years with periodic temperature/humidity reads. IC Role / Device Role / Timing Role: Single-supply regulator delivering 2.5 V to ultra-low-power sensor and microcontroller. Use Value: Factory-fused 2.5 V output eliminates VID resistor; UVLO prevents erratic operation below 2.06 V, preserving data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DRVR | 200 nA IQ, 1.8–5.5 V input, fixed 1.8/2.5/3.3 V outputs only; no VINOK or VID programming. | Lacks battery monitoring and adjustable output - suitable only for fixed-voltage, ultra-low-IQ apps without system-level battery management. | Choose if output voltage is fixed and VINOK is handled externally; avoid if programmable threshold or wide VOUT range is required. |
| MAX17651ATB+ | 600 nA IQ, 3–60 V input, 500 mA PWM, but no hysteresis mode or integrated VINOK. | Targets higher-input industrial rails; lacks sub-µA standby capability and battery-aware features. | Select for 12–48 V battery systems where hysteresis mode is unnecessary and wide VIN range dominates design priority. |
Compared with TPS62840DRVR and MAX17651ATB+, the ADP5303ACBZ-2-R7 uniquely combines ultralow hysteresis-mode IQ, programmable VINOK, and resistor-selectable VOUT in one WLCSP - enabling single-chip battery health monitoring and adaptive power states not possible with either alternative.
Availability
ADP5303ACBZ-2-R7 is available at Aetrix Electronics and suitable for energy metering, portable medical sensors, and industrial IoT nodes requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP5303ACBZ-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, serving precision instrumentation, industrial automation, and healthcare markets since 1965.
The ADP5303 belongs to Analog Devices' ultralow-power DC/DC regulator product line, engineered specifically for battery-operated equipment where multi-year runtime, accurate battery monitoring, and minimal PCB area are non-negotiable design constraints.
FAQ
What is the quiescent current of the ADP5303ACBZ-2-R7 in hysteresis mode?
The ADP5303ACBZ-2-R7 draws 240 nA typical quiescent current in hysteresis mode at 25°C, rising to 520 nA maximum over −40°C to +125°C. This ultralow IQ enables decade-long battery life in keep-alive applications such as utility meters and implantable medical monitors. The ADP5303ACBZ-2-R7 achieves this by disabling most internal circuitry during standby intervals while maintaining precise hysteresis-based regulation.
How does the ADP5303ACBZ-2-R7 select between hysteresis and PWM modes?
The ADP5303ACBZ-2-R7 uses the SYNC/MODE pin for mode selection: a logic low forces hysteresis mode (240 nA IQ, 50 mA output), while a logic high enables PWM mode (630 µA IQ, 500 mA output). When an external clock (1.5–2.5 MHz) is applied to SYNC/MODE, the device automatically synchronizes and remains in PWM mode. The ADP5303ACBZ-2-R7 supports dynamic switching between modes during operation without reset.
Can the ADP5303ACBZ-2-R7 monitor battery voltage, and how is the threshold set?
Yes, the ADP5303ACBZ-2-R7 integrates a dedicated VINOK pin that outputs an open-drain power-good signal when PVIN exceeds a factory-programmed threshold (2.05 V–5.15 V range). Threshold accuracy is ±3% over −40°C to +125°C. No external components are required - the ADP5303ACBZ-2-R7's VINOK function replaces discrete supervisors and simplifies battery health monitoring in space-constrained designs.
What output voltage options does the ADP5303ACBZ-2-R7 support, and how are they configured?
The ADP5303ACBZ-2-R7 supports output voltages from 0.8 V to 5.0 V via the VID pin: connect a resistor from VID to AGND (e.g., 11.8 kΩ = 1.2 V) or short VID to PVIN for factory-fused options (e.g., 2.5 V or 1.3 V). The ADP5303ACBZ-2-R7 samples VID at startup and holds the setting; no reconfiguration is possible without power cycle. Internal feedback eliminates external resistors, preserving ultralow IQ.
Does the ADP5303ACBZ-2-R7 include protection features, and what are they?
Yes, the ADP5303ACBZ-2-R7 integrates UVLO (2.06 V rising), overcurrent protection (1000 mA typical in PWM), thermal shutdown (142°C), and short-circuit frequency foldback. It also features 100% duty cycle operation to maintain regulation near dropout and quick output discharge (290 Ω internal switch) for safe power-down. These protections eliminate the need for external discrete components in most battery-powered applications using the ADP5303ACBZ-2-R7.
ADP5303ACBZ-2-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 9-WFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.15V
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 50mA, 500mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLCSP (1.87x1.65)
ADP5303ACBZ-2-R7 FAQ
1.How can I place an order for ADP5303ACBZ-2-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP5303ACBZ-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 ADP5303ACBZ-2-R7 reliable?
The price and inventory of ADP5303ACBZ-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 ADP5303ACBZ-2-R7 is usually 5 days.
3.What payment methods are accepted for ADP5303ACBZ-2-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP5303ACBZ-2-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP5303ACBZ-2-R7?
ADP5303ACBZ-2-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP5303ACBZ-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 ADP5303ACBZ-2-R7?
For technical support, including ADP5303ACBZ-2-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP5303ACBZ-2-R7 requirements.
6.How does Aetrix verify that ADP5303ACBZ-2-R7 is sourced from the original manufacturer or authorized distributors?
All ADP5303ACBZ-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 ADP5303ACBZ-2-R7 meets industry standards.
7.What is the process for return or replacement of ADP5303ACBZ-2-R7?
All ADP5303ACBZ-2-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP5303ACBZ-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 ADP5303ACBZ-2-R7 part is unused and in its original packaging.
Return procedure for ADP5303ACBZ-2-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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