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Analog Devices Inc./Maxim Integrated MAX889TESA+TG002
- Part No.:
- MAX889TESA+TG002
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
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MAX889TESA+TG002.pdf
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Product details
Overview
MAX889TESA+TG002 from Maxim Integrated is a high-frequency, regulated inverting charge pump DC-DC converter delivering up to 200mA negative output current with adjustable regulation from −2.5V to −VIN. It operates from 2.7V to 5.5V input, features 2MHz switching frequency, 0.05Ω regulated output resistance, and 0.1µA shutdown current. It serves as a compact, capacitor-based negative voltage rail generator in TFT panel bias supplies.
For engineers reviewing the MAX889TESA+TG002 datasheet, MAX889TESA+TG002 pinout, MAX889TESA+TG002 application, or MAX889TESA+TG002 equivalent, key selection criteria include regulated negative output range, 2MHz switching capability for minimal external capacitance (1µF flying cap), SO-8 package compatibility, and thermal/short-circuit protection behavior under load transients.
Technical Context
The MAX889TESA+TG002 integrates four on-chip power MOSFETs and a 2MHz oscillator to implement a continuous-duty inverting charge-pump topology. Regulation is achieved by modulating the gate drive of S1 to control flying-capacitor charge transfer, maintaining FB at GND and enabling precise output voltage setting via external resistor divider.
In regulated mode, it delivers stable −3.3V (or other user-defined negative voltage) with ≤10mV load regulation over 0–200mA and exhibits 0.05Ω effective output impedance. In free-run mode (FB tied to IN), it inverts VIN with ~2Ω open-loop output resistance and supports unregulated inversion without feedback components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2MHz - enables use of 1µF flying capacitor and 4.7µF output capacitor, reducing board area vs. lower-frequency variants |
| Max Output Current | 200mA at VOUT = −3.3V, VIN = 5V - sufficient for LCD bias, sensor analog rails, and op-amp dual-supply generation |
| Output Voltage Range | −2.5V to −VIN - supports flexible negative rail generation across common input voltages (3.3V, 5V) |
| Regulated Output Resistance | 0.05Ω - ensures <10mV droop under full 200mA load, critical for precision analog circuits |
| Shutdown Current | 0.1µA - enables ultra-low-power standby in battery-powered instruments and portable imaging systems |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion, two-cell alkaline, and standard 3.3V/5V system rails |
| Thermal Shutdown Threshold | 160°C with 15°C hysteresis - provides robust fault recovery during sustained overload or poor PCB thermal design |
Pinout & Package
MAX889TESA+TG002 is housed in an 8-pin SO (SOIC-N) surface-mount package with standard 1.27mm pitch and 5.0mm × 6.2mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Positive power supply input | Accepts 2.7V–5.5V; connects to input decoupling capacitor (4.7µF ceramic) |
| 2 CAP+ | Flying capacitor positive terminal | Charged to VIN during first half-cycle; requires low-ESR 1µF ceramic per Table 1 |
| 3 GND | Power ground reference | Main return path for input and output currents; must be star-connected to AGND near device |
| 4 CAP− | Flying capacitor negative terminal | Connected to OUT during second half-cycle; forms charge-transfer node with CAP+ |
| 5 OUT | Negative regulated output | Delivers −2.5V to −VIN; connects to load and output capacitor (4.7µF ceramic) |
| 6 SHDN | CMOS-compatible shutdown control | Drive low for 0.1µA quiescent mode; tie to IN for always-on operation |
| 7 FB | Feedback input for regulation | Servos to GND; connect to resistor divider between VIN (or VREF) and OUT to set output voltage |
| 8 AGND | Analog ground reference | Separate low-noise ground for FB and internal regulation circuitry; connect to GND at single point |
Key Features
| Feature | Design Value |
|---|---|
| Soft-start & foldback current limiting | Prevents inrush current at startup and limits input current to 200mA during short-circuit, protecting alkaline cells and weak sources |
| Integrated thermal shutdown | Halts switching at 160°C die temperature and resumes only after 15°C cooldown, preventing latch-up or damage |
| Low-noise regulated output | Well-defined 2MHz ripple spectrum and <20mVpp output ripple with 4.7µF COUT enables clean analog supply rails |
| Free-run mode support | FB tied to IN eliminates external resistors, enabling space-constrained unregulated inversion (VOUT ≈ −VIN + IOUT×2Ω) |
| High efficiency at light loads | Quiescent current of 11mA (typ) in regulated mode at VIN = 5V enables >85% efficiency down to 10mA load |
Applications
| TFT Panel Bias Supply | Hard Disk Drive Preamp Rail |
|---|---|
Use Scenario: Generating stable −3.3V or −5V bias for source/gate drivers in active-matrix LCD modules. IC Role / Device Role / Timing Role: Regulated negative voltage generator providing low-impedance, low-noise supply for display driver ICs. Use Value: 0.05Ω output resistance ensures <7mV droop under 150mA dynamic load steps, preserving grayscale fidelity and eliminating ghosting artifacts. |
Use Scenario: Powering analog front-end preamplifiers and servo control circuitry in 2.5-inch HDDs. IC Role / Device Role / Timing Role: Compact inverting DC-DC converter replacing discrete charge-pump solutions in tight head-actuator assemblies. Use Value: 2MHz operation allows 1µF flying capacitor, reducing total solution size by >40% versus 1MHz MAX889SESA while maintaining 200mA capability. |
| Digital Camera Sensor Interface | Portable Measurement Instrument |
Use Scenario: Supplying −2.5V reference rail for CMOS image sensor ADCs and correlated double sampling circuits. IC Role / Device Role / Timing Role: Low-noise negative regulator ensuring stable analog reference despite battery voltage sag during flash charging. Use Value: 0.1µA shutdown current extends standby time in sleep-mode camera systems; soft-start prevents sensor reset glitches during wake-up. |
Use Scenario: Creating isolated negative supply for precision op-amps and 16-bit SAR ADCs in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: High-accuracy inverting charge pump supporting ratiometric measurements with <±0.5% output voltage error over temperature. Use Value: Load regulation of ≤10mV over 0–200mA enables true 16-bit linearity without post-regulation LDO buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX889SESA+TG002 | 1MHz switching frequency; uses 2.2µF flying capacitor and 10µF output capacitor | Higher output ripple at same load; better quiescent current (5.5mA typ) in regulated mode | Select when board space permits larger capacitors and lower IQ is prioritized over ripple/noise performance |
| TPS60403DBVR | TI part; 2.5MHz switching, 60mA max output, integrated soft-start, no thermal shutdown | Limited to low-current analog rails; lacks short-circuit and thermal protection | Select only for ultra-low-power, low-current (<60mA) portable applications where protection features are secondary |
Compared with MAX889SESA+TG002 and TPS60403DBVR, MAX889TESA+TG002 uniquely combines 200mA output, 2MHz operation, full protection suite, and SO-8 compatibility-making it the only option among the three capable of driving high-current LCD bias rails while maintaining sub-20mVpp ripple and robust fault handling.
Availability
MAX889TESA+TG002 is available at Aetrix Electronics and suitable for TFT panel bias supplies, hard disk drive preamp rails, digital camera sensor interfaces, portable measurement instruments, and battery-powered instrumentation requiring stable component supply with guaranteed long-term availability.
Supply support for MAX889TESA+TG002 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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.
The MAX889 series targets space-constrained, high-efficiency negative voltage generation in portable and embedded systems, emphasizing capacitor-minimized design, robust protection, and wide input/output flexibility.
FAQ
What is the maximum output current capability of the MAX889TESA+TG002?
The MAX889TESA+TG002 delivers up to 200mA of regulated negative output current when VIN = 5V and VOUT = −3.3V. At VIN = 3.3V and VOUT = −2.5V, its maximum output current is 145mA. These values are specified in the Electrical Characteristics table and confirmed across the full −40°C to +85°C operating temperature range.
Can the MAX889TESA+TG002 generate a −5V output from a 5V input?
No-the MAX889TESA+TG002's regulated output range is limited to −2.5V to −VIN. With a 5V input, the most negative regulated output is −5V, but only if the load current is zero. Under load, output voltage drops due to 0.05Ω output resistance; at 100mA, VOUT ≈ −4.95V. For true −5V at full load, a higher-input-voltage design or post-regulation is required.
What capacitor values are required for the MAX889TESA+TG002 in regulated mode?
In regulated mode, the MAX889TESA+TG002 requires a 1µF ceramic flying capacitor (CFLY), a 4.7µF ceramic output capacitor (COUT), and a 4.7µF ceramic input capacitor (CIN), all rated for X7R dielectric and low ESR. These values are specified in Table 1 of the datasheet and optimized for 2MHz operation and minimal board area.
Does the MAX889TESA+TG002 include thermal protection?
Yes-the MAX889TESA+TG002 incorporates thermal shutdown with a 160°C trip threshold and 15°C hysteresis. When junction temperature exceeds 160°C, the internal oscillator stops and switching halts. Operation resumes automatically only after the die cools to 145°C, preventing thermal cycling and ensuring safe fault recovery.
How does the shutdown function work on the MAX889TESA+TG002?
The MAX889TESA+TG002 enters 0.1µA shutdown mode when the SHDN pin is driven logic-low (≤0.3×VIN). During shutdown, charge-pump switching stops, OUT goes high-impedance, and all internal circuitry except the SHDN comparator is disabled. To enable normal operation, SHDN must be tied to IN or pulled above 0.7×VIN.
MAX889TESA+TG002 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
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- Output Type:
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- Number of Outputs:
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- Voltage - Input (Max):
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- Voltage - Output (Min/Fixed):
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- Voltage - Output (Max):
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- Current - Output:
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- Frequency - Switching:
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- Synchronous Rectifier:
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- Supplier Device Package:
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MAX889TESA+TG002 FAQ
1.How can I place an order for MAX889TESA+TG002 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX889TESA+TG002 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 MAX889TESA+TG002 reliable?
The price and inventory of MAX889TESA+TG002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX889TESA+TG002 is usually 5 days.
3.What payment methods are accepted for MAX889TESA+TG002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX889TESA+TG002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX889TESA+TG002?
MAX889TESA+TG002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX889TESA+TG002 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 MAX889TESA+TG002?
For technical support, including MAX889TESA+TG002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX889TESA+TG002 requirements.
6.How does Aetrix verify that MAX889TESA+TG002 is sourced from the original manufacturer or authorized distributors?
All MAX889TESA+TG002 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 MAX889TESA+TG002 meets industry standards.
7.What is the process for return or replacement of MAX889TESA+TG002?
All MAX889TESA+TG002 units undergo pre-shipment inspection (PSI). If there is an issue with MAX889TESA+TG002, 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 MAX889TESA+TG002 part is unused and in its original packaging.
Return procedure for MAX889TESA+TG002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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