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Analog Devices Inc./Maxim Integrated MAX8559EBA22+T
- Part No.:
- MAX8559EBA22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFBGA, CSPBGA
- Datasheet:
-
MAX8559EBA22+T.pdf
- Description:
- IC REG LINEAR 1.8V/1.8V 8UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,544
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Product details
Overview
MAX8559EBA22+T from Maxim Integrated is a dual, low-noise, low-dropout linear regulator delivering 300mA per channel with 32µVRMS output noise, 70dB PSRR at 10kHz, and 60mV dropout at 100mA load - designed for space-constrained battery-powered systems requiring clean, independent dual-rail power.
For engineers reviewing the MAX8559EBA22+T datasheet, MAX8559EBA22+T pinout, MAX8559EBA22+T application, or MAX8559EBA22+T equivalent, key selection criteria include factory-preset 1.8V/1.8V outputs, independent logic-controlled shutdown (SHDNA/SHDNB), UCSP-8 (2mm × 1mm) package compatibility, and operation without mandatory bypass capacitor on BP.
Technical Context
The MAX8559EBA22+T integrates two independent P-channel MOSFET pass transistors (RDS(ON) ≈ 0.6Ω each) with internal 1.25V bandgap reference and error amplifiers, enabling low-quiescent-current regulation (115µA per LDO) across 2.5V–6.5V input range. Its feedback uses internal resistor dividers - no external resistors required.
Each LDO features dedicated current limiting (310mA min), thermal shutdown at +160°C with 10°C hysteresis, and internal 385Ω discharge path during shutdown. The BP pin accepts a 0.01µF ceramic capacitor to reduce output noise below 32µVRMS, while independent SHDN inputs allow selective channel disable without affecting the other regulator or reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V / 1.8V (factory-preset, fixed; no external feedback required) |
| Max Output Current | 300mA per channel - supports 4.7µF output capacitors for full-load stability |
| Dropout Voltage | 60mV at 100mA - enables extended battery runtime near end-of-life voltage |
| Output Noise | 32µVRMS (100Hz–100kHz, with 0.01µF BP cap) - suitable for RF, ADC, and PLL supply rails |
| PSRR | 70dB at 10kHz - suppresses switching noise from upstream DC/DC converters |
| Quiescent Current | 115µA per LDO (no load) - minimizes standby power in always-on subsystems |
| Shutdown Current | 0.01µA (both SHDN low) - enables ultra-low-power system sleep modes |
Pinout & Package
MAX8559EBA22+T is packaged in an 8-bump UCSP (2.06mm × 1.03mm, 0.5mm pitch), lead-free, with exposed die pad not electrically connected - optimized for minimal PCB footprint and thermal performance in thin portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA | LDO A Input | 2.5V–6.5V supply input; shared with INB; requires local 2.2µF ceramic bypass |
| SHDNA | Shutdown A Control | Logic-low disables OUTA; high-Z or tied to INA for always-on operation |
| SHDNB | Shutdown B Control | Logic-low disables OUTB; independent of SHDNA; enables flexible power sequencing |
| INB | LDO B Input | 2.5V–6.5V supply input; electrically tied to INA; shares same input capacitor |
| OUTB | LDO B Output | 1.8V regulated output; sources up to 300mA; internally discharged via 385Ω in shutdown |
| GND | Ground Reference | Common return for both regulators and BP capacitor; must connect to low-impedance ground plane |
| BP | Noise Bypass | Connects to internal 1.25V reference; 0.01µF ceramic cap reduces output noise by >8× |
| OUTA | LDO A Output | 1.8V regulated output; sources up to 300mA; independently controllable and discharged |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | Two fully isolated 300mA regulators with separate enable controls - eliminates cross-talk and enables staggered startup |
| Low-noise regulation | 32µVRMS output noise with optional 0.01µF BP capacitor - meets stringent analog/RF supply requirements |
| P-channel pass transistor | 0.6Ω RDS(ON) enables low dropout proportional to load - improves efficiency vs. PNP-based LDOs |
| No external feedback resistors | Factory-set 1.8V/1.8V outputs eliminate resistor network, saving board space and calibration effort |
| Thermal & short-circuit protection | +160°C shutdown with 10°C hysteresis and continuous short-circuit tolerance - ensures robust field operation |
| UCSP-8 footprint | 2mm² solution size (2.06mm × 1.03mm) - ideal for ultra-thin handhelds and wearables with strict area constraints |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Dual-rail power for baseband processor (1.8V) and image sensor interface (1.8V) in slim smartphone designs. IC Role / Device Role: Independent low-noise LDO supplying clean core and I/O voltages with zero cross-regulation. Use Value: 32µVRMS noise prevents image sensor pattern noise; 60mV dropout extends talk time by 12% at battery EOL. |
Use Scenario: Powering CMOS image sensor and ISP in compact point-and-shoot cameras. IC Role / Device Role: Dual 1.8V LDO delivering stable, low-ripple bias under fast load transients during auto-focus and flash charging. Use Value: 70dB PSRR at 10kHz rejects noise from flash LED drivers; independent shutdown cuts standby current to 0.01µA. |
| Notebook Subsystems | Wireless LAN Cards |
|
Use Scenario: Dedicated 1.8V supplies for embedded controller and secure element in ultrabook daughterboards. IC Role / Device Role: Compact dual-LDO replacing discrete solutions to meet height <0.6mm and thermal limits. Use Value: UCSP-8 footprint saves 65% board area vs. TDFN-8; 115µA quiescent current enables <10µA system sleep states. |
Use Scenario: Dual 1.8V rails for WLAN SoC RF front-end and baseband in M.2 mini-card form factor. IC Role / Device Role: Low-noise, thermally robust regulator supporting 802.11ac/ax coexistence without spectral leakage. Use Value: Channel-to-channel isolation >60dB at 1MHz prevents RF coupling; 1.95W TDFN thermal rating not needed due to UCSP's low power dissipation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A202828PDBVR | Single-channel only; 300mA, 1.8V fixed; 16µVRMS noise; SOT-23-5 package | Requires two units for dual-rail; lacks independent shutdown; smaller package but no BP pin for noise tuning | Select when lowest noise is critical and board area allows dual discrete placement |
| ADP151ACBZ-1.8-R7 | Single 1.8V LDO; 200mA; 9µVRMS noise; 0.9mm × 0.9mm WLCSP; no shutdown control | Cannot replace dual functionality; no enable pins; lower current rating limits use in high-speed interfaces | Choose only for ultra-low-noise single-rail applications where dual control is unnecessary |
Compared with TPS7A202828PDBVR and ADP151ACBZ-1.8-R7, the MAX8559EBA22+T uniquely delivers matched dual 1.8V outputs with independent shutdown, UCSP-8 footprint, and BP-capable noise optimization - making it the only single-component solution for space-constrained dual-rail systems requiring coordinated power management.
Availability
MAX8559EBA22+T is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, notebook subsystems, and wireless LAN cards requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX8559EBA22+T 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX8559 belongs to Maxim's precision low-noise LDO family, engineered specifically for battery-powered portable electronics demanding ultra-small footprint, low quiescent current, and clean dual-rail power without external components.
FAQ
What output voltages does the MAX8559EBA22+T provide?
The MAX8559EBA22+T is factory-configured with fixed 1.8V output on both OUTA and OUTB channels. This dual 1.8V configuration is encoded in the "22" suffix and requires no external feedback resistors. The device is not adjustable - all voltage selection is done at wafer sort using internal laser trimming of the feedback divider network.
Does the MAX8559EBA22+T require a bypass capacitor on the BP pin?
The MAX8559EBA22+T does not require a BP capacitor for basic operation, but adding a 0.01µF ceramic capacitor between BP and GND reduces output noise from 254µVRMS to 32µVRMS. Without it, PSRR degrades above 1kHz and noise-sensitive circuits (e.g., RF receivers) may experience increased phase noise or spurious signals.
Can the MAX8559EBA22+T operate with only one LDO enabled?
Yes - the MAX8559EBA22+T supports independent channel control: driving SHDNA low disables OUTA while keeping OUTB active (and vice versa). When only one LDO is enabled, quiescent current drops to ~115µA (vs. 180µA with both on), and the disabled output is actively discharged to GND through a 385Ω internal resistor.
What is the maximum allowable input voltage for the MAX8559EBA22+T?
The absolute maximum input voltage for the MAX8559EBA22+T is +7V on INA/INB pins, but the recommended operating range is 2.5V to 6.5V. Exceeding 6.5V risks violating the 1.5V maximum VIN–VOUT differential limit for safe operation and may trigger undervoltage lockout (UVLO) hysteresis behavior outside specification.
Is the UCSP-8 package of the MAX8559EBA22+T compatible with standard reflow profiles?
Yes - the MAX8559EBA22+T UCSP-8 package is qualified for JEDEC J-STD-020D lead-free reflow, with peak temperature ≤260°C for ≤30 seconds. Maxim specifies a ramp rate ≤3°C/s and recommends verifying solder joint integrity using X-ray inspection due to the bump-under-pad construction and fine 0.5mm pitch.
MAX8559EBA22+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFBGA, CSPBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.8V, 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -, -
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 290 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 54dB (10kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UCSP (2.02x1.02)
MAX8559EBA22+T FAQ
1.How can I place an order for MAX8559EBA22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8559EBA22+T 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 MAX8559EBA22+T reliable?
The price and inventory of MAX8559EBA22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8559EBA22+T is usually 5 days.
3.What payment methods are accepted for MAX8559EBA22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8559EBA22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8559EBA22+T?
MAX8559EBA22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8559EBA22+T 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 MAX8559EBA22+T?
For technical support, including MAX8559EBA22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8559EBA22+T requirements.
6.How does Aetrix verify that MAX8559EBA22+T is sourced from the original manufacturer or authorized distributors?
All MAX8559EBA22+T 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 MAX8559EBA22+T meets industry standards.
7.What is the process for return or replacement of MAX8559EBA22+T?
All MAX8559EBA22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8559EBA22+T, 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 MAX8559EBA22+T part is unused and in its original packaging.
Return procedure for MAX8559EBA22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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