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Analog Devices Inc. ADP1853ACPZ-R7
- Part No.:
- ADP1853ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP1853ACPZ-R7.pdf
- Description:
- IC REG CTRLR BUCK 20LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,501
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Product details
Overview
ADP1853ACPZ-R7 from Analog Devices is a synchronous step-down DC-to-DC controller supporting input voltages from 2.75 V to 20 V, output voltages from 0.6 V to 90% VIN, and >25 A output current capability. It implements valley-current-mode control with ±1% output voltage accuracy over −40°C to +125°C and features voltage tracking, synchronization, and programmable switching frequency (200 kHz–1.5 MHz) for telecom base station POL systems.
For engineers reviewing the ADP1853ACPZ-R7 datasheet, ADP1853ACPZ-R7 pinout, ADP1853ACPZ-R7 application, or ADP1853ACPZ-R7 equivalent, key selection considerations include its dual-mode (current/voltage) control architecture, integrated bootstrap diode, precision enable and power good outputs, configurable slope compensation, and support for precharged load startup in high-reliability intermediate bus converters.
Technical Context
The ADP1853ACPZ-R7 uses emulated peak current mode control with valley current sensing for fast transient response, and can be reconfigured to voltage mode via external resistor on DL pin. Its internal oscillator supports resistor-programmed or externally synchronized operation (170–1725 kHz), with CLKOUT providing phase-shifted clock output for interleaving.
It integrates a 5 V LDO (VCCO) with 350 mA current limit, internal bootstrap diode, and dual gate drivers (DH/DL) with <25 ns dead time, 14–16 ns rise/fall times, and RON of 1.5–2.3 Ω. Protection includes UVLO (2.55 V rising), overvoltage/undervoltage on FB (±18 mV hysteresis), thermal shutdown at 155°C, and accurate current-limit sensing via ILIM pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.75 V to 20 V - supports common intermediate bus rails (3.3 V, 5 V, 12 V) and wide industrial inputs. |
| Output Voltage Accuracy | ±1% over −40°C to +125°C - enables tight regulation without external calibration in harsh environments. |
| Switching Frequency | 200 kHz to 1.5 MHz - adjustable via FREQ pin resistor or external SYNC signal for EMI optimization and size reduction. |
| Current Sense Gain | Programmable 3×, 6×, or 12× via DL-to-PGND resistor - allows precise current limit setting across MOSFET RDS(on) variations. |
| VCCO LDO Output | 5.0 V ±0.3 V at 100 mA - powers internal circuitry and gate drivers; remains active during EN low for controlled sequencing. |
| Power Good Threshold | FB overvoltage = 0.65 V ±20 mV, undervoltage = 0.55 V ±15 mV - provides reliable system-level rail monitoring with internal 12.5 kΩ pull-up. |
| Soft Start Current | 6.5 µA typical - sets linear ramp time with external SS capacitor; supports controlled startup into precharged loads. |
Pinout & Package
ADP1853ACPZ-R7 is housed in a 20-lead, 4 mm × 4 mm LFCSP package with exposed pad thermally connected to AGND. The package supports high-power density layouts and efficient thermal dissipation in multi-phase or high-current buck applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable Input | Logic-controlled startup; 0.63 V threshold with 30 mV hysteresis enables precision UVLO using resistor divider from VIN. |
| FB | Feedback Input | Monitors output via resistor divider; 0.6 V reference enables 0.6 V–90% VIN regulation; tied to VCCO for slave mode in interleaved configurations. |
| SYNC | Synchronization Input | Accepts external clock (170–1725 kHz); forces PWM mode and locks switching frequency; pull-up to VCCO ensures fallback to PWM if signal lost. |
| CLKOUT | Internal Clock Output | 1× frequency, 180° phase-shifted output - synchronizes secondary ADP185x controllers to reduce input ripple and improve EMI. |
| DL / DH | Gate Driver Outputs | Drive low-side/high-side N-MOSFET gates; support ≤20 nF total capacitance; feature <25 ns dead time and <2 Ω RON for efficient switching. |
| ILIM | Current-Limit Comparator Input | Inverting input referenced to PGND; used with sense resistor at low-side source for accurate cycle-by-cycle current limiting. |
| RAMP | Slope Compensation Input | High-impedance node; resistor from VIN sets emulated ramp slope and provides VIN feedforward for improved line rejection. |
| TRK | Voltage Tracking Input | Enables output voltage sequencing relative to another rail; offset ≤±10 mV ensures tight tracking accuracy during power-up/down. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Control Mode | Current mode (fast transient response) or voltage mode (low noise/crosstalk) selected via DL-to-PGND resistor - adapts to digital vs. analog load requirements. |
| Integrated Bootstrap Diode | 16 Ω forward resistance - eliminates external bootstrap diode, reduces BOM count and layout area in high-frequency designs. |
| Precharged Load Startup | Validated operation with VOUT prebiased - avoids reverse current and inrush issues in hot-swap or redundant power systems. |
| Accurate Current Limit | ±5 mV ILIM threshold tolerance - enables narrow current-sense resistor tolerance selection and smaller overall converter footprint. |
| Power Saving Mode | Pulse skip at light load with 2.5 mA quiescent current - improves efficiency below ~10% load without compromising regulation stability. |
Applications
| Telecom Base Station POL | Industrial PLC Power Supply |
|---|---|
|
Use Scenario: Point-of-load conversion from 12 V intermediate bus to 3.3 V/5 V for FPGA, ASIC, and SerDes interfaces in 5G remote radio units. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing sequencing, voltage tracking, and synchronization across multiple rails. Use Value: Enables phase-shifted interleaving via CLKOUT to cut input ripple by >50%, reducing bulk capacitor size and improving thermal performance. |
Use Scenario: Regulating 24 V industrial bus to isolated 5 V and 3.3 V supplies for microcontroller, I/O, and communication modules in programmable logic controllers. IC Role / Device Role / Timing Role: High-accuracy, high-current controller with precision enable and PGOOD for safe power sequencing and fault reporting. Use Value: ±1% output accuracy and −40°C to +125°C operation ensure stable performance across extended temperature ranges without derating. |
| Medical Imaging Power Module | Test & Measurement Equipment |
|
Use Scenario: Generating tightly regulated 1.2 V and 1.8 V rails for high-speed ADCs and digital processing units in portable ultrasound and MRI subsystems. IC Role / Device Role / Timing Role: Dual-mode controller configured in voltage mode to minimize switching noise coupling into sensitive analog signal chains. Use Value: Low-noise voltage mode operation and programmable slope compensation suppress EMI-induced measurement errors in sub-mV resolution systems. |
Use Scenario: Providing stable, low-ripple 1.0 V–3.3 V supplies for FPGA-based logic analyzers and high-speed oscilloscope front-ends requiring fast load transient response. IC Role / Device Role / Timing Role: Valley-current-mode controller delivering <100 ns minimum on/off times and <200 ns load-step recovery for dynamic digital loads. Use Value: Fast step response (<10 µs to settle within ±1%) and programmable soft start prevent supply droop during instrument boot and configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2950GQ-Z | Fixed 600 kHz frequency; no voltage mode option; lacks TRK and CLKOUT; integrated MOSFETs (40 V, 12 A max). | Targeted at space-constrained, lower-current (<12 A) applications where external FETs are undesirable. | Select MP2950GQ-Z only when integrated power stage suffices and tracking/synchronization are not required. |
| LTC3891EFE#PBF | Wider VIN range (4–60 V); supports dual-output; no internal LDO or bootstrap diode; requires external bias supply. | Suitable for high-input industrial or automotive systems needing >20 V input or dual-rail generation. | Choose LTC3891EFE#PBF when operating above 20 V or requiring dual independent outputs with independent loop control. |
Compared with MP2950GQ-Z and LTC3891EFE#PBF, the ADP1853ACPZ-R7 uniquely balances wide input flexibility, dual control modes, integrated gate drive support, and advanced sequencing features - making it optimal for high-performance, multi-rail telecom and instrumentation POL designs where layout efficiency and signal integrity are critical.
Availability
ADP1853ACPZ-R7 is available at Aetrix Electronics and suitable for telecom base station power management, industrial PLCs, medical imaging subsystems, and test equipment requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ADP1853ACPZ-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, RF, and signal chain technologies.
The ADP1853ACPZ-R7 belongs to Analog Devices' ADP185x family of high-efficiency synchronous buck controllers, designed specifically for demanding point-of-load applications requiring accurate voltage tracking, multi-controller synchronization, and robust protection in telecom, industrial, and medical systems.
FAQ
What is the maximum supported output current for ADP1853ACPZ-R7?
The ADP1853ACPZ-R7 is rated for maximum output current exceeding 25 A when paired with appropriately sized external N-channel MOSFETs and passive components. Actual achievable current depends on thermal design, PCB layout, input/output voltage differential, and switching frequency - but the controller's gate drivers, current sense amplifier, and protection circuitry are validated for continuous operation at ≥25 A under typical 12 VIN/3.3 VOUT conditions per the datasheet efficiency plots and load-step waveforms.
Can ADP1853ACPZ-R7 operate in voltage mode control, and how is it configured?
Yes, ADP1853ACPZ-R7 can be configured for voltage mode control by connecting a 100 kΩ ±5% resistor between the DL pin and PGND. This disables current sensing in the PWM comparator path and routes only the emulated ramp signal, resulting in lower noise and reduced crosstalk - ideal for powering noise-sensitive analog circuits. The configuration is latched at power-up and remains fixed until reset.
Does ADP1853ACPZ-R7 support startup into a precharged output, and what design considerations apply?
Yes, ADP1853ACPZ-R7 explicitly supports startup into a precharged output, as confirmed in the General Description and Figure 13 (Soft Start with Precharged Output). To ensure safe operation, the EN pin must be asserted only after the output reaches a stable prebias level, and the feedback divider must be designed to avoid false PGOOD assertion. No external reverse-current protection is required due to internal control logic preventing shoot-through.
What is the function of the TRK pin on ADP1853ACPZ-R7, and what tracking accuracy is achievable?
The TRK pin on ADP1853ACPZ-R7 accepts an external voltage reference to enable precise output voltage tracking during power-up and power-down sequences. When TRK is driven with a ramp or stepped voltage, the FB regulation point follows with an offset of −10 mV to +10 mV, ensuring tight matching (≤±10 mV) between rails - critical for FPGAs and processors requiring controlled voltage sequencing to avoid latch-up or damage.
How does the CLKOUT signal of ADP1853ACPZ-R7 enable interleaved operation with other controllers?
The CLKOUT signal of ADP1853ACPZ-R7 provides a 1× frequency, 180° phase-shifted clock output that can directly drive the SYNC pin of a second ADP1853ACPZ-R7 or compatible ADP185x device. This forces phase interleaving, reducing input ripple current amplitude by up to 50%, lowering RMS input capacitor stress, improving EMI signature, and enabling smaller bulk capacitance - all without requiring external timing ICs or complex PLL circuitry.
ADP1853ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-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:
- 1
- Output Phases:
- 1
- 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, Ramp, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LFCSP (4x4)
ADP1853ACPZ-R7 FAQ
1.How can I place an order for ADP1853ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1853ACPZ-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 ADP1853ACPZ-R7 reliable?
The price and inventory of ADP1853ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1853ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP1853ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1853ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1853ACPZ-R7?
ADP1853ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1853ACPZ-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 ADP1853ACPZ-R7?
For technical support, including ADP1853ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1853ACPZ-R7 requirements.
6.How does Aetrix verify that ADP1853ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1853ACPZ-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 ADP1853ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP1853ACPZ-R7?
All ADP1853ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1853ACPZ-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 ADP1853ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP1853ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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