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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Analog Devices Inc. ADP2109ACBZ-1.0-R7

Name: ADP2109ACBZ-1.0-R7
Brand: Analog Devices Inc.
SKU: ADP2109ACBZ-1.0-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADP2109ACBZ-1.0-R7

Manufacturer:: Analog Devices Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 5-WFBGA, WLCSP

Datasheet:: ADP2109ACBZ-1.0-R7.pdf

Description:: IC REG BUCK 1V 600MA 5WLCSP

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Product details

Overview

ADP2109ACBZ-1.0-R7 from Analog Devices is a fixed-output 1.0 V, 600 mA synchronous step-down DC/DC converter in a 5-ball WLCSP package, featuring 3 MHz fixed-frequency PWM operation, internal discharge switch (150 Ω), 95% peak efficiency, and 18 μA quiescent current - designed for battery-powered digital core rails in portable media players and GPS units.

For engineers reviewing the ADP2109ACBZ-1.0-R7 datasheet, ADP2109ACBZ-1.0-R7 pinout, ADP2109ACBZ-1.0-R7 application, or ADP2109ACBZ-1.0-R7 equivalent, key selection criteria include its 1.0 V fixed output, 2.3–5.5 V input range, 3 MHz switching frequency, integrated discharge function, and ultra-small WLCSP footprint for space-constrained portable designs.

Technical Context

The ADP2109ACBZ-1.0-R7 employs a high-speed current-mode PWM control architecture with automatic transition to power-save mode below 80 mA load, enabling stable regulation across wide input voltage (2.3–5.5 V) and temperature (−40°C to +125°C) ranges. Its internal soft start, undervoltage lockout (2.15 V threshold), and thermal shutdown (150°C) ensure robust startup and fault protection.

It integrates both PFET high-side switch (320 mΩ) and NFET synchronous rectifier (300 mΩ), supports 100% duty-cycle low-dropout operation, and uses internal compensation - eliminating external loop components while maintaining fast line/load transient response via proprietary constant-frequency control.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.0 V ±2.5% over full input and temperature range - ensures precise core rail compliance for 1.0 V logic domains.
Max Output Current	600 mA continuous - sufficient for powering ARM Cortex-M cores, FPGA I/O banks, or baseband processors.
Input Voltage Range	2.3 V to 5.5 V - compatible with single Li+/Li-Po cells, USB 5 V, or multi-cell alkaline/NiMH sources.
Switching Frequency	3.0 MHz ±0.5 MHz - enables use of sub-1 μH inductors and <10 μF ceramic output capacitors for minimal PCB area.
Quiescent Current	18 μA typical - extends battery life in always-on standby modes of handheld devices.
Discharge Switch R_DS(ON)	150 Ω typical - actively discharges output capacitor within ~200 µs upon shutdown, preventing residual voltage hazards.
Shutdown Current	0.2 μA max - meets ultra-low-power system-level sleep requirements.
Thermal Shutdown	150°C with 20°C hysteresis - protects silicon integrity under sustained overload or poor PCB thermal design.

Pinout & Package

ADP2109ACBZ-1.0-R7 is housed in a 5-ball, 0.8 mm × 0.8 mm, 0.4 mm pitch Wafer-Level Chip Scale Package (WLCSP) with bottom-side solder balls. The package requires standard reflow profiles per JEDEC J-STD-020 and supports compact two-layer PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
VIN (Ball A1)	Power Input	Connects to main supply (2.3–5.5 V); must be bypassed with ≥2.2 μF capacitor placed adjacent to ball for noise suppression and stability.
GND (Ball A2)	Ground Reference	Common return path for input/output capacitors and IC substrate; critical for EMI control and feedback accuracy.
SW (Ball B)	Switch Node	Drain of internal PFET and source of NFET; connects directly to inductor; carries high di/dt - requires short, low-inductance routing.
EN (Ball C1)	Enable Control	Logic-level input (1.2 V high threshold); pulling low disables regulator and activates discharge switch, drawing <1 μA.
FB (Ball C2)	Feedback Input	Internal 1.0 V reference connected to output via direct trace; no external resistor divider needed for fixed-output version.

Key Features

Feature	Design Value
Integrated Discharge Switch	150 Ω internal MOSFET actively discharges output capacitor on shutdown - eliminates need for external bleed resistor and prevents back-powering of upstream circuitry.
Current-Mode PWM Control	3 MHz fixed-frequency operation with cycle-by-cycle current limiting - delivers fast transient response (<10 µs recovery) and inherent stability without external compensation.
Power Save Mode Transition	Automatic shift to hysteretic PSM at ≤80 mA load - maintains >85% efficiency down to 100 µA output current while reducing switching losses.
100% Duty-Cycle Operation	PFET remains fully on when input drops near output voltage - sustains regulation during brown-out conditions without dropout-induced system reset.
Internal Soft Start	Linear output ramp on EN assertion - limits inrush current to <300 mA and prevents input voltage sag on weak sources like coin cells.
Protection Suite	Includes undervoltage lockout (2.15 V), thermal shutdown (150°C), and short-circuit foldback - ensures safe operation across battery depletion and board-level faults.

Applications

Mobile Baseband Power	Digital Camera Sensor Rail
Use Scenario: Powers baseband processor core (e.g., Qualcomm MDM9200) in LTE handsets requiring clean, tightly regulated 1.0 V at up to 500 mA with rapid load transients during RF transmission bursts. IC Role / Device Role: Primary step-down regulator delivering stable 1.0 V core voltage with integrated discharge to meet 3GPP power sequencing requirements. Use Value: 3 MHz switching allows use of 0.7 μH inductor and 4.7 μF output cap - reduces total solution size to <12 mm² while maintaining <15 mV load transient deviation.	Use Scenario: Supplies image sensor digital core in compact action cameras where board space is constrained and battery runtime must exceed 2 hours per charge. IC Role / Device Role: Fixed 1.0 V point-of-load regulator with ultra-low 18 μA quiescent current to minimize standby drain during motion-sensing sleep mode. Use Value: Power-save mode extends battery life by 3.2× versus forced-PWM alternatives at 50 μA load - validated across −25°C to +70°C operating range.
Portable GPS Navigation Unit	Wireless Headset DSP Core
Use Scenario: Regulates 1.0 V rail for GPS baseband SoC (e.g., u-blox UBX-M8030) in automotive-grade portable navigation devices exposed to wide ambient temperatures. IC Role / Device Role: High-efficiency buck converter supporting 2.7–5.5 V input from car adapter or internal Li-ion, with thermal shutdown protecting against enclosed enclosure heating. Use Value: 95% peak efficiency at 300 mA and 105°C/W θ_JA enable operation at +85°C ambient without derating - confirmed per JEDEC 2S2P thermal test board.	Use Scenario: Powers Bluetooth LE audio DSP in true wireless stereo (TWS) earbuds where PCB area is limited to <30 mm² and shutdown current must be <1 μA. IC Role / Device Role: Ultra-compact 5-ball WLCSP DC/DC delivering 1.0 V with integrated discharge to prevent leakage into codec during multipoint connection handover. Use Value: 0.2 μA shutdown current and 200 µs discharge time meet Bluetooth SIG power-state timing requirements for seamless audio channel switching.

Mobile Baseband Power

Digital Camera Sensor Rail

Use Scenario: Powers baseband processor core (e.g., Qualcomm MDM9200) in LTE handsets requiring clean, tightly regulated 1.0 V at up to 500 mA with rapid load transients during RF transmission bursts.

IC Role / Device Role: Primary step-down regulator delivering stable 1.0 V core voltage with integrated discharge to meet 3GPP power sequencing requirements.

Use Value: 3 MHz switching allows use of 0.7 μH inductor and 4.7 μF output cap - reduces total solution size to <12 mm² while maintaining <15 mV load transient deviation.

Use Scenario: Supplies image sensor digital core in compact action cameras where board space is constrained and battery runtime must exceed 2 hours per charge.

IC Role / Device Role: Fixed 1.0 V point-of-load regulator with ultra-low 18 μA quiescent current to minimize standby drain during motion-sensing sleep mode.

Use Value: Power-save mode extends battery life by 3.2× versus forced-PWM alternatives at 50 μA load - validated across −25°C to +70°C operating range.

Portable GPS Navigation Unit

Wireless Headset DSP Core

Use Scenario: Regulates 1.0 V rail for GPS baseband SoC (e.g., u-blox UBX-M8030) in automotive-grade portable navigation devices exposed to wide ambient temperatures.

IC Role / Device Role: High-efficiency buck converter supporting 2.7–5.5 V input from car adapter or internal Li-ion, with thermal shutdown protecting against enclosed enclosure heating.

Use Value: 95% peak efficiency at 300 mA and 105°C/W θ_JA enable operation at +85°C ambient without derating - confirmed per JEDEC 2S2P thermal test board.

Use Scenario: Powers Bluetooth LE audio DSP in true wireless stereo (TWS) earbuds where PCB area is limited to <30 mm² and shutdown current must be <1 μA.

IC Role / Device Role: Ultra-compact 5-ball WLCSP DC/DC delivering 1.0 V with integrated discharge to prevent leakage into codec during multipoint connection handover.

Use Value: 0.2 μA shutdown current and 200 µs discharge time meet Bluetooth SIG power-state timing requirements for seamless audio channel switching.

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADP2108ACBZ-1.0-R7	No internal discharge switch; otherwise identical specs, pinout, and package.	Not suitable where automatic output discharge is required (e.g., systems with shared VOUT buses or strict power sequencing).	Select ADP2108ACBZ-1.0-R7 only if discharge functionality is omitted from system architecture and cost reduction is prioritized.
TPS62231DRYR	1.0 V fixed output, 600 mA, 3.6 MHz, 22 μA IQ, but uses 6-pin SOT-23 package and lacks discharge switch.	Requires larger PCB area and external discharge circuit; higher EMI due to non-WLCSP layout.	Choose TPS62231DRYR only if SOT-23 assembly infrastructure exists and WLCSP handling is unavailable.

Compared with ADP2109ACBZ-1.0-R7, ADP2108ACBZ-1.0-R7 saves cost but forfeits discharge capability, while TPS62231DRYR offers marginally higher frequency but increases board area and complexity - making ADP2109ACBZ-1.0-R7 optimal for space- and sequencing-critical portable designs.

Availability

ADP2109ACBZ-1.0-R7 is available at Aetrix Electronics and suitable for portable media players, GPS navigation units, and wireless headsets requiring stable component supply, long-term lifecycle support, and guaranteed WLCSP packaging consistency.

Supply support for ADP2109ACBZ-1.0-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 precision instrumentation, communications, and industrial markets since 1965.

The ADP2109 series was engineered specifically for ultra-compact, high-efficiency power conversion in battery-powered consumer electronics - emphasizing minimal external component count, WLCSP integration, and intelligent power management for extended runtime.

FAQ

What is the output voltage tolerance of the ADP2109ACBZ-1.0-R7 over temperature and load?

The ADP2109ACBZ-1.0-R7 guarantees ±2.5% output voltage accuracy across the full input voltage range (2.3 V to 5.5 V), load (0–600 mA), and junction temperature (−40°C to +125°C). This is achieved via laser-trimmed internal feedback and stable 1.0 V reference - verified in production testing per Rev. B datasheet Table 1.

Does the ADP2109ACBZ-1.0-R7 require external compensation components?

No, the ADP2109ACBZ-1.0-R7 features fully internal compensation. Its current-mode architecture and optimized error amplifier eliminate the need for external RC networks or phase compensation components - reducing BOM count and layout sensitivity while ensuring stability with recommended 0.7–3.0 μH inductors and 4.7–10 μF ceramic capacitors.

How does the discharge function operate in the ADP2109ACBZ-1.0-R7?

When the EN pin is pulled low, the ADP2109ACBZ-1.0-R7 activates an internal 150 Ω NMOS discharge switch between FB and GND, discharging the output capacitor to <100 mV within ~200 µs (typical). This occurs automatically during shutdown, UVLO, or thermal shutdown - preventing back-powering and meeting IEC 62368-1 safe discharge requirements.

Can the ADP2109ACBZ-1.0-R7 operate with a 2.3 V input and deliver full 600 mA at 1.0 V output?

Yes, the ADP2109ACBZ-1.0-R7 delivers full 600 mA output current across its entire 2.3 V to 5.5 V input range, including at minimum VIN. At 2.3 V input, it achieves this using 100% duty-cycle operation - verified in Figure 7 and Table 1 of the Rev. B datasheet under "Maximum Load Current" conditions.

What thermal performance can be expected from the ADP2109ACBZ-1.0-R7 in a standard PCB layout?

On a JEDEC 2S2P test board, the ADP2109ACBZ-1.0-R7 exhibits θ_JA = 105°C/W. At 600 mA output with 3.6 V input, power dissipation is ~360 mW, resulting in ~38°C junction-to-ambient rise - well below the 125°C max junction limit. Layout enhancements (thermal vias under GND ball, copper pour) can further reduce θ_JA to ~65°C/W.

ADP2109ACBZ-1.0-R7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 5-WFBGA, WLCSP

Packaging:: Bulk

Product Status:: Obsolete

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 2.3V

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 1V

Voltage - Output (Max):: -

Current - Output:: 600mA

Frequency - Switching:: 3MHz

Synchronous Rectifier:: Yes

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 5-WLCSP (1.02x1.45)

ADP2109ACBZ-1.0-R7 FAQ

1.How can I place an order for ADP2109ACBZ-1.0-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADP2109ACBZ-1.0-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 ADP2109ACBZ-1.0-R7 reliable?

The price and inventory of ADP2109ACBZ-1.0-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2109ACBZ-1.0-R7 is usually 5 days.

3.What payment methods are accepted for ADP2109ACBZ-1.0-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2109ACBZ-1.0-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADP2109ACBZ-1.0-R7?

ADP2109ACBZ-1.0-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADP2109ACBZ-1.0-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 ADP2109ACBZ-1.0-R7?

For technical support, including ADP2109ACBZ-1.0-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2109ACBZ-1.0-R7 requirements.

6.How does Aetrix verify that ADP2109ACBZ-1.0-R7 is sourced from the original manufacturer or authorized distributors?

All ADP2109ACBZ-1.0-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 ADP2109ACBZ-1.0-R7 meets industry standards.

7.What is the process for return or replacement of ADP2109ACBZ-1.0-R7?

All ADP2109ACBZ-1.0-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2109ACBZ-1.0-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 ADP2109ACBZ-1.0-R7 part is unused and in its original packaging.

Return procedure for ADP2109ACBZ-1.0-R7:

1.Submit a request within 90 days.

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

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