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Analog Devices Inc./Maxim Integrated MAX5026EUT/GH9
- Part No.:
- MAX5026EUT/GH9
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX5026EUT/GH9.pdf
- Description:
- IC REG BOOST ADJ 260MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,930
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Product details
Overview
MAX5026EUT/GH9 from Maxim Integrated is a constant-frequency, current-mode PWM boost DC-DC converter optimized for low-noise, high-voltage bias generation in tuner applications. It operates from 3V to 11V input, delivers up to 36V output, switches at 500kHz (typ), integrates a 40V lateral DMOS power switch, and supports user-adjustable output voltage via external feedback resistors. It is deployed in TV tuner varactor diode biasing where stable 30V output and minimal switching noise are critical.
For engineers reviewing the MAX5026EUT/GH9 datasheet, MAX5026EUT/GH9 pinout, MAX5026EUT/GH9 application, or MAX5026EUT/GH9 equivalent, this page provides verified technical context, validated pin functions, confirmed design parameters including 500kHz switching frequency, 1.25V FB set point, 3V–11V input range, 36V max output, and 1.3Ω typical LX on-resistance - all essential for low-noise boost design validation and component selection.
Technical Context
The MAX5026EUT/GH9 implements a BiCMOS current-mode PWM architecture with direct-summing comparator control-eliminating traditional error amplifier phase shift for cycle-by-cycle regulation of peak inductor current. Its discontinuous conduction mode operation suppresses output voltage spikes during LX switch turn-on by avoiding simultaneous conduction paths through diode and switch to ground.
It features a 40ns typical LX switch turn-off time to reduce positive slew rate and limit inductor current-induced output voltage transients. The internal 40V lateral DMOS switch (1.3Ω typ RON) enables reliable 30V output generation up to 36V, while the 1.25V ±3% FB reference allows precise external resistor-based output setting across temperature (±0.5mV/°C drift).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 11V - enables direct operation from single Li-ion or 3.3V/5V system rails without pre-regulation. |
| Switching Frequency | 500kHz (typ) - permits use of compact 47µH inductors and simplifies EMI filtering with predictable spectral content. |
| FB Set Point | 1.25V ±3% - defines output voltage VOUT = 1.25V × (1 + R1/R2); tolerance directly impacts output accuracy under load/temperature. |
| LX On-Resistance | 1.3Ω (typ) at VCC = 5V - determines conduction loss and thermal rise at peak switch current (260mA limit). |
| Shutdown Current | 1µA (max) - ensures negligible battery drain in standby mode for portable tuner modules. |
| Output Voltage Range | VCC to 36V - supports 30V varactor biasing with 6V headroom for line/load transients and ripple margin. |
| Thermal Shutdown | 140°C with 2°C hysteresis - protects against sustained overload or poor PCB thermal design without oscillatory shutdown. |
Pinout & Package
MAX5026EUT/GH9 is housed in a thermally enhanced 6-pin SOT23 package (package code S8-2), with exposed pad for improved heat dissipation in high-duty-cycle boost applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGND | Power Ground | Low-impedance return path for LX switch current; must connect to local ground plane using star grounding to minimize noise coupling into analog sections. |
| 2 - GND | Analog Ground | Reference node for internal comparators and FB circuitry; separate from PGND to isolate sensitive analog signals from high di/dt switching currents. |
| 3 - FB | Feedback Input | Monitors divided output voltage; internal 1.25V reference sets regulation point; trace length must be minimized to avoid noise injection and stability degradation. |
| 4 - SHDN | Shutdown Control | Active-low enable: tie to GND for <1µA quiescent current; tie to VCC for normal operation; no pull-up required. |
| 5 - VCC | Input Supply | Power input pin requiring local 4.7µF ceramic bypass capacitor; accepts 3V–11V; powers internal logic and gate driver. |
| 6 - LX | Switch Node | Drain of internal 40V DMOS FET; connects to inductor and catch diode; high dv/dt node requiring short, low-inductance routing to limit EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Constant 500kHz PWM frequency | Enables predictable EMI filtering and consistent inductor sizing; avoids variable-frequency noise spreading that complicates compliance testing. |
| Discontinuous conduction mode (DCM) | Eliminates output voltage spike during LX turn-on by preventing simultaneous conduction through diode and switch, reducing need for snubbers. |
| 40ns LX turn-off time | Reduces dV/dt-induced capacitive coupling and radiated emissions; lowers peak output voltage overshoot during light-load transitions. |
| Integrated 40V lateral DMOS switch | Supports 30V output with 6V margin; eliminates external MOSFET and associated gate-drive complexity in space-constrained tuner PCBs. |
| User-adjustable output via FB pin | Permits precise 30V tuning (±0.5V) using standard 1% resistors; accommodates production tolerances and aging effects in varactor diodes. |
Applications
| TV Tuner Varactor Biasing | Set-Top Box Tuner Power Supply |
|---|---|
Use Scenario: Generating stable 30V bias for voltage-controlled oscillator (VCO) varactor diodes in terrestrial/cable TV tuners. IC Role / Device Role / Timing Role: Primary boost regulator delivering low-noise, regulated DC bias; replaces discrete charge-pump or transformer-based solutions. Use Value: 500kHz fixed frequency and DCM operation reduce conducted EMI below 30MHz, easing FCC Part 15 compliance without added filtering components. |
Use Scenario: Providing 30V rail for tuner module in digital set-top boxes operating from 3.3V or 5V main supply. IC Role / Device Role / Timing Role: Compact, integrated step-up converter enabling single-layer PCB layout with minimal BOM count. Use Value: 1.3Ω typical RON and 1µA shutdown current extend battery backup runtime and reduce thermal load in enclosed chassis. |
| PCI Cable Modem Tuner | Avalanche Photodiode (APD) Biasing |
Use Scenario: Local 30V generation for QAM tuner front-end in PCI-express cable modems with tight board area constraints. IC Role / Device Role / Timing Role: High-efficiency boost controller supporting up to 4mA output with <1% load regulation (0–4mA). Use Value: SOT23-6 footprint and 47µH inductor compatibility allow full tuner power stage in <15mm² area, meeting PCIe add-in card height limits. |
Use Scenario: Precision high-voltage bias source for APDs in optical receivers requiring stable 25–35V with low ripple. IC Role / Device Role / Timing Role: Low-noise DC-DC converter with RC-filter-ready output stage to achieve <1mVp-p ripple at 30V. Use Value: 1.25V FB reference with ±3% tolerance and <0.5mV/°C drift ensures APD gain stability over industrial temperature range (−40°C to +85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5028EUT-T | Fixed 30V output (no external resistors needed); identical 3V–11V input, 500kHz, SOT23-6 package. | Eliminates R1/R2 design effort but removes output adjustability; FB pin internally connected to output divider. | Select MAX5028EUT-T when 30V is fixed and board space for feedback resistors is constrained. |
| TPS61040DBVR | 500kHz, 28V max output, 1.8V–6V input, 0.5Ω RDS(on), but requires external compensation and lacks integrated 40V switch. | Lower input range suits single-cell Li-ion; lower max output limits use in 30V+ varactor apps without derating. | Choose TPS61040DBVR only if input is ≤6V and output ≤28V; verify external FET and diode ratings for 30V operation. |
Compared with MAX5026EUT/GH9, MAX5028EUT-T offers drop-in 30V simplicity but sacrifices adjustability, while TPS61040DBVR provides lower RDS(on) at the cost of external component dependencies and reduced output voltage margin-making MAX5026EUT/GH9 optimal for 30V tuner bias where precision, noise, and integration are prioritized.
Availability
MAX5026EUT/GH9 is available at Aetrix Electronics and suitable for TV tuner modules, set-top box power supplies, and PCI cable modem designs requiring stable component supply, long-term manufacturability, and guaranteed parametric performance across −40°C to +85°C.
Supply support for MAX5026EUT/GH9 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 MAX5025–MAX5028 product line was designed specifically for low-noise, high-voltage DC-DC conversion in RF tuner and display bias applications-emphasizing fixed-frequency PWM control, integrated power switches, and SOT23 packaging for space-constrained systems.
FAQ
What is the exact input voltage range supported by MAX5026EUT/GH9?
The MAX5026EUT/GH9 supports an input voltage range of 3V to 11V, as confirmed in the Electrical Characteristics table under "Input Voltage Range" for MAX5026/MAX5028. This allows direct operation from single Li-ion cells (3.0–4.2V), 3.3V logic rails, or 5V system supplies without intermediate regulation. Operation below 3V will trigger undervoltage lockout (VUVLO = 2.65V typ).
Does MAX5026EUT/GH9 require external feedback resistors to set output voltage?
Yes, MAX5026EUT/GH9 is an adjustable-output variant and requires two external resistors (R1 and R2) connected to the FB pin to set VOUT = 1.25V × (1 + R1/R2). Unlike the fixed-output MAX5028EUT-T, it does not have internal feedback dividers; the FB pin must be externally biased to achieve 30V or other target voltages within the 36V maximum.
What is the typical switching frequency and its tolerance for MAX5026EUT/GH9?
The MAX5026EUT/GH9 operates at a typical switching frequency of 500kHz, with a tolerance of −18% to +34% across process, voltage, and temperature (per Selector Guide). At VCC = 3.3V, the range is specified as 410kHz to 670kHz. This fixed-frequency architecture enables deterministic EMI filter design and avoids subharmonic instability seen in variable-frequency converters.
Can MAX5026EUT/GH9 drive a 30V output at 4mA load continuously?
Yes, MAX5026EUT/GH9 is rated for continuous 30V output at up to 4mA load, as demonstrated in Typical Operating Characteristics (Figures toc24–toc25) and confirmed by the 120mW max output power rating. Efficiency exceeds 70% at 5V input/30V–4mA output (Figure toc04), and thermal shutdown (140°C) provides protection under sustained load with proper PCB copper area.
What package type and pin configuration does MAX5026EUT/GH9 use?
MAX5026EUT/GH9 uses a 6-pin SOT23 package (package code S8-2), with pin 1 = PGND, pin 2 = GND, pin 3 = FB, pin 4 = SHDN, pin 5 = VCC, and pin 6 = LX. This matches the mechanical outline in Maxim document 21-0058 and is electrically identical to MAX5025–MAX5028 family members-ensuring consistent layout reuse across variants.
MAX5026EUT/GH9 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 11V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 36V
- Current - Output:
- 260mA (Switch)
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX5026EUT/GH9 FAQ
1.How can I place an order for MAX5026EUT/GH9 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5026EUT/GH9 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 MAX5026EUT/GH9 reliable?
The price and inventory of MAX5026EUT/GH9 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5026EUT/GH9 is usually 5 days.
3.What payment methods are accepted for MAX5026EUT/GH9?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5026EUT/GH9 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5026EUT/GH9?
MAX5026EUT/GH9 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5026EUT/GH9 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 MAX5026EUT/GH9?
For technical support, including MAX5026EUT/GH9 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5026EUT/GH9 requirements.
6.How does Aetrix verify that MAX5026EUT/GH9 is sourced from the original manufacturer or authorized distributors?
All MAX5026EUT/GH9 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 MAX5026EUT/GH9 meets industry standards.
7.What is the process for return or replacement of MAX5026EUT/GH9?
All MAX5026EUT/GH9 units undergo pre-shipment inspection (PSI). If there is an issue with MAX5026EUT/GH9, 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 MAX5026EUT/GH9 part is unused and in its original packaging.
Return procedure for MAX5026EUT/GH9:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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