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Analog Devices Inc. ADP1850ACPZ-R7
- Part No.:
- ADP1850ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP1850ACPZ-R7.pdf
- Description:
- IC REG CTRLR BUCK 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,091
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Product details
Overview
ADP1850ACPZ-R7 from Analog Devices is a dual-output/two-phase synchronous buck controller for high-current DC-DC conversion, supporting 2.75 V to 20 V input, 0.6 V to 90% VIN output, and >25 A per channel with ±0.85% reference accuracy and 180° interchannel phase shift. It enables precise current sharing in telecom base station power supplies and point-of-load converters.
For engineers reviewing the ADP1850ACPZ-R7 datasheet, ADP1850ACPZ-R7 pinout, ADP1850ACPZ-R7 application, or ADP1850ACPZ-R7 equivalent, key selection considerations include programmable switching frequency (200 kHz–1.5 MHz), independent channel enable/soft start, accurate voltage tracking, and integrated boost diodes for reduced BOM count in multi-rail industrial and networking systems.
Technical Context
The ADP1850ACPZ-R7 uses valley-current sensing in a fixed-frequency current-mode architecture to deliver fast transient response and enhanced noise immunity. Its dual-channel design supports both independent dual-output operation and interleaved two-phase single-output mode with 180° phase shift.
Each channel features independent error amplifiers (Gm = 385–715 µS), programmable current sense gain (3–24 V/V), and external slope compensation via RAMP pins. The device integrates a 5 V LDO (VCCO), internal boot diodes, and thermal shutdown at 155°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.75 V to 20 V - supports wide-input intermediate bus rails including 3.3 V, 5 V, 12 V, and up to 20 V industrial supplies |
| Output Voltage Accuracy | ±0.85% at −40°C to +85°C - ensures tight regulation for sensitive FPGA/CPU core rails |
| Switching Frequency | 200 kHz to 1.5 MHz - set by single resistor on FREQ pin; enables optimization of size vs. efficiency |
| Phase Shift | 180° between channels - reduces input RMS ripple current and cuts required bulk capacitance by ~2× |
| Current Sharing Accuracy | Interleaved operation with matched current limit thresholds (±6%) - enables stable parallel operation above 50 A total output |
| Power Good Accuracy | FB overvoltage threshold = 0.65 V ±15 mV - provides reliable sequencing feedback without external comparators |
| Thermal Protection | 155°C shutdown with 20°C hysteresis - prevents latch-up during sustained overload or poor airflow conditions |
Pinout & Package
ADP1850ACPZ-R7 is housed in a thermally enhanced 32-lead 5 mm × 5 mm LFCSP package with exposed pad connected to AGND. Pin count and layout support full dual-channel gate drive, independent feedback, soft start, tracking, and current sensing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 / EN2 | Independent channel enable inputs | Logic-level control (0.63 V threshold) with hysteresis - enables robust power sequencing and fault isolation per rail |
| DH1/DH2, DL1/DL2 | High-side and low-side MOSFET gate drivers | Capable of driving ≤20 nF total gate capacitance; RON = 1.5–2.3 Ω ensures fast edge rates and minimal dead-time loss |
| FB1/FB2 | Output voltage feedback nodes | 0.6 V reference with ±0.85% accuracy - sets output via resistor divider; supports remote sensing |
| TRK1/TRK2 | Voltage tracking inputs | Accepts external ramp or supply reference; enables precise pre-bias startup and multi-rail sequencing |
| ILIM1/ILIM2 | Current limit comparator inputs | −5 mV to +5 mV offset tolerance - allows accurate current-sense resistor placement at low-side MOSFET source |
| PGOOD1/PGOOD2 | Open-drain power-good outputs | Internal 12.5 kΩ pull-up to VCCO - eliminates need for external resistors; asserts low on UV/OV fault |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diodes | 16 Ω forward resistance at 20 mA - eliminates two external Schottky diodes per channel, reducing cost and board area |
| Programmable power saving mode (PSM) | Pulse-skipping below ~10% load - improves light-load efficiency without audible noise or regulation degradation |
| Independent soft start | 6.5 µA internal current source into SS1/SS2 - enables staggered ramp-up of dual outputs with user-set timing via capacitor |
| Accurate voltage tracking | ±10 mV FB-to-TRK offset - supports tight tracking (e.g., DDR memory VDDQ to VTT) without external op-amps |
| Synchronization input (SYNC) | Accepts 400–3000 kHz external clock - eliminates beat frequencies in multi-controller systems and enables deterministic EMI shaping |
Applications
| Telecom Base Station Power | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Dual-rail 12 V input converted to isolated 3.3 V and 1.8 V supplies for RF transceivers and digital signal processors. IC Role / Device Role / Timing Role: Dual-output buck controller providing synchronized, tracked outputs with independent enable and soft start for safe hot-swap insertion. Use Value: 180° phase shift reduces input capacitor RMS current by 30%, enabling smaller 1206 ceramic arrays instead of larger tantalum banks. |
Use Scenario: Compact DIN-rail mounted controller requiring 5 V and 3.3 V rails from 24 V DC field supply with strict sequencing and brown-out immunity. IC Role / Device Role / Timing Role: Two-phase controller operating in interleaved mode to deliver >30 A combined output while maintaining <10 mV cross-regulation. Use Value: Independent EN1/EN2 and TRK1/TRK2 allow firmware-controlled power-up order and voltage ramp matching across analog and digital subsystems. |
| Networking Switch ASIC Core Supply | Medical Imaging Sensor Bias Rails |
Use Scenario: High-efficiency 0.85 V core rail for 16 nm switch ASIC with dynamic load steps up to 20 A/µs and strict ripple limits (<10 mVpp). IC Role / Device Role / Timing Role: Single two-phase configuration delivering >50 A with valley-current sensing and programmable slope compensation for stability under fast transients. Use Value: ±6% current limit accuracy enables tighter MOSFET SOA margining, reducing heatsink volume by 22% versus looser-tolerance controllers. |
Use Scenario: Low-noise, low-drift bias for CMOS image sensor arrays requiring matched 2.5 V and 1.2 V rails with sub-mV tracking error. IC Role / Device Role / Timing Role: Dual-output controller with precision 0.6 V reference and ±10 mV tracking offset used in closed-loop bias generation with external DAC feedback. Use Value: Integrated VCCO LDO (4.7–5.3 V @ 100 mA) powers external DAC and level-shifters, eliminating need for third discrete regulator. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2950GQ-Z | Fixed 600 kHz frequency; no SYNC input; lacks independent TRK/EN per channel | Targeted at cost-sensitive consumer SSD power; limited sequencing flexibility | Choose when fixed frequency and simplified layout outweigh need for tracking or synchronization |
| LTC3855EUH#PBF | Supports up to 4-phase operation; higher VIN max (38 V); requires external bootstrap diodes | Used in automotive infotainment and industrial motor drives with wider input range | Choose when >2-phase scalability or >20 V input is required, accepting added BOM and layout complexity |
Compared with MP2950GQ-Z and LTC3855EUH#PBF, the ADP1850ACPZ-R7 uniquely balances programmable frequency, per-channel tracking/enable, and integrated bootstrap diodes in a compact 5 mm × 5 mm footprint-making it optimal for space-constrained, multi-rail telecom and networking equipment where design reuse and EMI control are critical.
Availability
ADP1850ACPZ-R7 is available at Aetrix Electronics and suitable for telecom base station power supplies, industrial PLC I/O modules, and networking switch ASIC core supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ADP1850ACPZ-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 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 ADP1850ACPZ-R7 belongs to Analog Devices' high-current DC-DC controller product line, designed specifically for scalable, high-efficiency power conversion in multi-rail infrastructure equipment where reliability, thermal performance, and design flexibility are paramount.
FAQ
What is the maximum supported input voltage for the ADP1850ACPZ-R7?
The ADP1850ACPZ-R7 supports an absolute maximum input voltage of 21 V on the VIN pin, with guaranteed operational range from 2.75 V to 20 V. Operation beyond 20 V risks permanent damage, and the undervoltage lockout (UVLO) activates at 2.4–2.75 V rising threshold to prevent erratic startup.
Does the ADP1850ACPZ-R7 require external bootstrap diodes?
No, the ADP1850ACPZ-R7 integrates internal bootstrap diodes between VDL and BST1/BST2, with typical forward resistance of 16 Ω at 20 mA. This eliminates the need for two external Schottky diodes per channel, simplifying layout and reducing BOM count without sacrificing gate drive performance.
How does the ADP1850ACPZ-R7 achieve accurate current sharing between phases?
The ADP1850ACPZ-R7 achieves accurate current sharing through matched valley-current sensing architecture, ±6% current limit tolerance, and 180° interchannel phase alignment. Each channel's ILIMx input accepts identical current-sense resistor configurations, and the shared oscillator ensures synchronized ramp generation for balanced duty cycles.
Can the ADP1850ACPZ-R7 operate with only one channel enabled?
Yes, the ADP1850ACPZ-R7 supports single-channel operation: tie EN2 low to disable Channel 2 while running Channel 1 independently. RAMP2, TRK2, and other Channel 2 pins become high-impedance. The controller maintains full functionality-including soft start, PSM, and current limiting-for the active channel.
What is the purpose of the VDL pin on the ADP1850ACPZ-R7?
The VDL pin on the ADP1850ACPZ-R7 supplies power to the low-side gate drivers (DL1/DL2). It must be bypassed to PGNDx with ≥1 µF ceramic capacitance and is internally connected to VCCO. Using VDL instead of VCCO for low-side drive improves noise immunity and ensures robust turn-on of N-channel MOSFETs during high dV/dt switching events.
ADP1850ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 2.75V ~ 20V
- Frequency - Switching:
- 200kHz ~ 1.5MHz
- Duty Cycle (Max):
- 90%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LFCSP (5x5)
ADP1850ACPZ-R7 FAQ
1.How can I place an order for ADP1850ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1850ACPZ-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 ADP1850ACPZ-R7 reliable?
The price and inventory of ADP1850ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1850ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP1850ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1850ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1850ACPZ-R7?
ADP1850ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1850ACPZ-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 ADP1850ACPZ-R7?
For technical support, including ADP1850ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1850ACPZ-R7 requirements.
6.How does Aetrix verify that ADP1850ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1850ACPZ-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 ADP1850ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP1850ACPZ-R7?
All ADP1850ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1850ACPZ-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 ADP1850ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP1850ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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