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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Analog Devices Inc. ADP1828YRQZ-R7

Name: ADP1828YRQZ-R7
Brand: Analog Devices Inc.
SKU: ADP1828YRQZ-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADP1828YRQZ-R7

Manufacturer:: Analog Devices Inc.

Category:: DC DC Switching Controllers

Package:: 20-SSOP (0.154", 3.90mm Width)

Datasheet:: ADP1828YRQZ-R7.pdf

Description:: IC REG CTRLR BUCK 20QSOP

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Product details

Overview

ADP1828YRQZ-R7 from Analog Devices is a synchronous buck PWM DC-to-DC controller driving all-N-channel MOSFET power stages to regulate output voltages from 0.6 V up to 85% of input (1 V–24 V input range), with ±0.85% FB regulation accuracy over 0°C–70°C and fixed or resistor-adjustable 300 kHz–600 kHz switching frequency. It integrates internal 5 V LDO, clock output for multi-controller synchronization, and lossless current sensing via MOSFET R_DS(on).

For engineers reviewing the ADP1828YRQZ-R7 datasheet, ADP1828YRQZ-R7 pinout, ADP1828YRQZ-R7 application, or ADP1828YRQZ-R7 equivalent, key selection criteria include its wide bias voltage range (3.0 V–20 V), tracking capability for power sequencing, thermal shutdown at 145°C, and availability in 20-lead QSOP - critical for telecom, DSP core, and medical imaging point-of-load designs.

Technical Context

The ADP1828YRQZ-R7 implements voltage-mode PWM control with an internal error amplifier (70 dB open-loop gain, 20 MHz GBW) and ramp-based comparator. Its oscillator supports pin-selectable 300/600 kHz operation, resistor tuning (300–600 kHz), or external synchronization up to 1.2 MHz - with CLKOUT configurable for 1× or 2× oscillator frequency via CLKSET.

It features integrated gate drivers (DH/DL) with 1.5 Ω sink/2 Ω source R_ON at 5 V drive, 15 ns rise/fall times into 3 nF, and 40 ns dead time. Current limiting uses lossless sensing via CSL input referenced to PGND with −38 mV threshold, while soft start and reverse-current protection manage precharged outputs.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	Pin-selectable 300 kHz or 600 kHz; resistor-adjustable 300–600 kHz; sync-capable up to 1.2 MHz - enables EMI control and inductor size optimization.
FB Regulation Accuracy	±0.85% at 0°C–70°C - ensures tight output voltage tolerance for DSP/microprocessor core rails.
Input Voltage Range (Bias)	3.0 V–20 V - supports direct operation from 3.3 V, 5 V, or 12 V system rails without external bias supply.
VREG Output	5.0 V ±2.5% (−40°C to +125°C), 220 mA current limit - powers internal circuitry and gate drivers; requires ≥1 μF ceramic bypass.
Current Sense Threshold	−38 mV (typ) at CSL pin - enables lossless current limiting using MOSFET R_DS(on), eliminating sense resistor losses.
Thermal Shutdown	145°C trigger with 15°C hysteresis - protects against sustained overload in enclosed industrial or telecom enclosures.
Shutdown Current	15 μA max - minimizes standby power in battery-backed or energy-sensitive systems.

Pinout & Package

ADP1828YRQZ-R7 is packaged in a 20-lead QSOP (YRQZ suffix), with exposed pad not present - distinct from the LFCSP variant. Pin functions are electrically identical across packages per datasheet Table 3.

Pin/Terminal	Circuit Role	Design Meaning
IN	Bias supply input	Accepts 3.0–20 V; powers internal LDO (VREG) when ≥5.5 V; tied to VREG/PV for <5.5 V operation.
VREG	LDO output	5 V regulated supply for control logic and gate drivers; requires ≥1 μF ceramic bypass to AGND.
DH / DL	High-side / low-side gate drivers	Drive N-channel MOSFET gates; DH sourced from BST-SW boost rail; DL referenced to PV.
SW	Switch node	Connects to inductor and high-side MOSFET drain; critical for layout low-inductance routing.
CSL	Current sense comparator input	Inverting input referenced to PGND; senses voltage drop across MOSFET R_DS(on) for lossless current limit.
FB	Feedback input	Monitors output via resistor divider; regulates to 600 mV ±0.85%; high-impedance (5–100 nA bias).
TRK	Tracking input	Enables voltage sequencing by following master rail; supports coincident or ratiometric startup/shutdown.
CLKOUT	Synchronization output	Provides 1× or 2× oscillator frequency (via CLKSET) to synchronize other ADP1828/ADP1829 controllers.

Key Features

Feature	Design Value
All-N-channel MOSFET support	Reduces BOM cost and conduction losses vs. P-channel high-side solutions; enables high-efficiency 20 A point-of-load designs.
Lossless current limiting	Uses MOSFET R_DS(on) as current sense element via CSL pin - eliminates power loss and board space of discrete sense resistors.
Output voltage tracking	TRK pin accepts external voltage reference to coordinate startup/shutdown timing with other rails - essential for FPGA, DDR, and multi-core SoC sequencing.
Integrated 5 V LDO	Generates clean gate drive and logic supply from wide input (3–20 V); eliminates need for external bias regulator in most applications.
Programmable soft start	Capacitor-connected SS pin controls ramp rate; prevents input inrush and provides reverse-current protection during precharged output startup.

Applications

Telecom Base Station Power	DSP/Microprocessor Core Supply
Use Scenario: Generating 1.2 V/20 A core voltage for multicore baseband processors in 4G/5G remote radio units. IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating low-voltage, high-current rail with precise sequencing relative to I/O and memory supplies. Use Value: ±0.85% FB accuracy and 300 kHz operation enable stable regulation under dynamic load transients typical of burst-mode wireless processing.	Use Scenario: Delivering tightly regulated 1.8 V @ 20 A to digital signal processors in medical imaging subsystems (e.g., ultrasound beamformers). IC Role / Device Role / Timing Role: Voltage mode controller with TRK pin synchronized to auxiliary 3.3 V I/O rail for controlled power-up sequence. Use Value: Lossless R_DS(on) current sensing avoids added heat and efficiency loss in thermally constrained enclosures.
Set-Top Box SoC Power	Industrial PLC I/O Module Supply
Use Scenario: Providing 1.0 V–1.35 V core voltage to broadcast SoCs with rapid load steps during video decode bursts. IC Role / Device Role / Timing Role: High-frequency (600 kHz) buck controller minimizing output filter size while maintaining <1% output deviation. Use Value: 15 ns gate driver rise/fall times and 40 ns dead time ensure clean switching transitions and minimal shoot-through risk.	Use Scenario: Generating isolated 5 V or 3.3 V auxiliary rails in programmable logic controller backplanes with wide input (12–24 V DC). IC Role / Device Role / Timing Role: Robust controller operating across −40°C to +125°C junction temperature with thermal shutdown and UVLO. Use Value: 145°C thermal shutdown and 3.0 V–20 V bias range ensure reliable operation in unventilated industrial cabinets.

Telecom Base Station Power

DSP/Microprocessor Core Supply

Use Scenario: Generating 1.2 V/20 A core voltage for multicore baseband processors in 4G/5G remote radio units.

IC Role / Device Role / Timing Role: Primary synchronous buck controller regulating low-voltage, high-current rail with precise sequencing relative to I/O and memory supplies.

Use Value: ±0.85% FB accuracy and 300 kHz operation enable stable regulation under dynamic load transients typical of burst-mode wireless processing.

Use Scenario: Delivering tightly regulated 1.8 V @ 20 A to digital signal processors in medical imaging subsystems (e.g., ultrasound beamformers).

IC Role / Device Role / Timing Role: Voltage mode controller with TRK pin synchronized to auxiliary 3.3 V I/O rail for controlled power-up sequence.

Use Value: Lossless R_DS(on) current sensing avoids added heat and efficiency loss in thermally constrained enclosures.

Set-Top Box SoC Power

Industrial PLC I/O Module Supply

Use Scenario: Providing 1.0 V–1.35 V core voltage to broadcast SoCs with rapid load steps during video decode bursts.

IC Role / Device Role / Timing Role: High-frequency (600 kHz) buck controller minimizing output filter size while maintaining <1% output deviation.

Use Value: 15 ns gate driver rise/fall times and 40 ns dead time ensure clean switching transitions and minimal shoot-through risk.

Use Scenario: Generating isolated 5 V or 3.3 V auxiliary rails in programmable logic controller backplanes with wide input (12–24 V DC).

IC Role / Device Role / Timing Role: Robust controller operating across −40°C to +125°C junction temperature with thermal shutdown and UVLO.

Use Value: 145°C thermal shutdown and 3.0 V–20 V bias range ensure reliable operation in unventilated industrial cabinets.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADP1829YRQZ-R7	Pin-compatible successor with enhanced current-sense accuracy (±3%), lower shutdown current (5 μA), and extended FREQ range (200–1000 kHz).	Preferred for new designs requiring tighter current monitoring or wider frequency flexibility; shares same QSOP footprint.	Select ADP1829YRQZ-R7 when upgrading for improved current-limit precision or broader frequency tuning.
TPS40210DGQR	Current-mode controller with external compensation; no integrated LDO; requires external 5 V bias; 100–1000 kHz adjustable frequency.	Suitable where system already provides clean 5 V bias and current-mode control is preferred for fast transient response.	Choose TPS40210DGQR only if existing 5 V bias rail exists and current-mode architecture is mandated for loop stability.

Compared with ADP1828YRQZ-R7, ADP1829YRQZ-R7 offers higher current-sense accuracy and lower quiescent current in identical packaging, while TPS40210DGQR trades integrated bias regulation for greater loop design flexibility - making ADP1828YRQZ-R7 optimal for cost-sensitive, self-biased, voltage-mode applications.

Availability

ADP1828YRQZ-R7 is available at Aetrix Electronics and suitable for telecom infrastructure, DSP core power, and medical imaging systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADP1828YRQZ-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, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets.

The ADP1828 belongs to Analog Devices' high-efficiency DC-to-DC controller product line, designed specifically for demanding point-of-load applications in telecom, computing, and medical equipment where precision regulation, sequencing, and thermal robustness are critical.

FAQ

What is the function of the TRK pin on the ADP1828YRQZ-R7?

The TRK pin on the ADP1828YRQZ-R7 enables voltage tracking for power supply sequencing. When driven by a resistor divider from a master rail, it forces the ADP1828YRQZ-R7's output to follow that voltage during startup, shutdown, and fault conditions - ensuring safe ramp-up/down order for FPGAs, DDR memory, or multi-rail SoCs without external supervisors.

Does the ADP1828YRQZ-R7 require an external current sense resistor?

No, the ADP1828YRQZ-R7 does not require an external current sense resistor. It implements lossless current limiting by sensing the voltage drop across the low-side MOSFET's R_DS(on) via the CSL pin, with a typical threshold of −38 mV - reducing power loss, board area, and BOM cost compared to shunt-based solutions.

What package type is used for the ADP1828YRQZ-R7?

The ADP1828YRQZ-R7 uses a 20-lead QSOP (Quad Small Outline Package) with standard gull-wing leads. The "YRQZ" part number suffix explicitly denotes this package; it is distinct from the LFCSP variant (e.g., ADP1828ACPZ-R7) and has no exposed thermal pad.

Can the ADP1828YRQZ-R7 operate with a 3.3 V input supply?

Yes, the ADP1828YRQZ-R7 operates with a 3.3 V input supply. When IN is between 3.0 V and 5.5 V, the datasheet requires tying IN, PV, and VREG together - bypassing the internal LDO and powering control circuitry and gate drivers directly from the 3.3 V rail, with appropriate decoupling.

How is the switching frequency set on the ADP1828YRQZ-R7?

The switching frequency of the ADP1828YRQZ-R7 is set via the FREQ pin: grounded for 300 kHz, pulled high to VREG for 600 kHz, or connected to GND through a resistor (e.g., 35.7 kΩ for 450 kHz). It also supports external synchronization via the SYNC pin up to 1.2 MHz when FREQ is high.

ADP1828YRQZ-R7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 20-SSOP (0.154", 3.90mm Width)

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):: 3V ~ 20V

Frequency - Switching:: 300kHz, 600kHz

Duty Cycle (Max):: 93%

Synchronous Rectifier:: Yes

Clock Sync:: Yes

Serial Interfaces:: -

Control Features:: Enable, Frequency Control, Power Good, Soft Start, Tracking

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-QSOP

ADP1828YRQZ-R7 FAQ

1.How can I place an order for ADP1828YRQZ-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADP1828YRQZ-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 ADP1828YRQZ-R7 reliable?

The price and inventory of ADP1828YRQZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1828YRQZ-R7 is usually 5 days.

3.What payment methods are accepted for ADP1828YRQZ-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1828YRQZ-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADP1828YRQZ-R7?

ADP1828YRQZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADP1828YRQZ-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 ADP1828YRQZ-R7?

For technical support, including ADP1828YRQZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1828YRQZ-R7 requirements.

6.How does Aetrix verify that ADP1828YRQZ-R7 is sourced from the original manufacturer or authorized distributors?

All ADP1828YRQZ-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 ADP1828YRQZ-R7 meets industry standards.

7.What is the process for return or replacement of ADP1828YRQZ-R7?

All ADP1828YRQZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1828YRQZ-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 ADP1828YRQZ-R7 part is unused and in its original packaging.

Return procedure for ADP1828YRQZ-R7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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