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Analog Devices Inc./Maxim Integrated MAX1692EUB+T
- Part No.:
- MAX1692EUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1692EUB+T.pdf
- Description:
- IC REG BUCK ADJ 600MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,318
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Product details
Overview
The MAX1692EUB+T from Maxim Integrated is a low-noise, synchronous PWM step-down DC-DC converter optimized for Li-ion battery-powered wireless systems. It delivers up to 600mA output current with adjustable voltage (1.25V to VIN) across a +2.7V to +5.5V input range, features 750kHz fixed-frequency operation, 95% peak efficiency, and supports forced-PWM, PWM/PFM, and shutdown modes. It powers baseband logic and transmitters in cellular phones and PDAs.
For engineers reviewing the MAX1692EUB+T datasheet, MAX1692EUB+T pinout, MAX1692EUB+T application, or MAX1692EUB+T equivalent, key selection criteria include its 10-pin µMAX package, internal synchronous rectification eliminating external Schottky diodes, 1.25V ±1.2% reference accuracy, 85µA quiescent current in Idle Mode™, and 100% duty-cycle capability for ultra-low dropout operation.
Technical Context
The MAX1692EUB+T employs a slope-compensated current-mode PWM controller with minimum on-time of ~150ns and maximum on-time exceeding one oscillator period-enabling true 100% duty-cycle operation. Its dual MOSFET power stage integrates a P-channel main switch (0.4Ω typical RDS(ON)) and N-channel synchronous rectifier (0.8Ω typical RDS(ON)), controlled by independent current-sense comparators for cycle-by-cycle limiting and NEGLIM-based reverse-current management.
Four operational modes are implemented via the SYNC/PWM and LIM pins: forced PWM (SYNC/PWM = IN), synchronizable PWM (external clock 500–1000kHz), PWM/PFM (SYNC/PWM = GND), and shutdown (SHDN = GND). The LIM pin selects between 600mA (LIM = IN) and 250mA (LIM = GND) current limits, while feedback regulation uses a precision 1.25V reference with ±1.2% tolerance over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.7V to +5.5V - supports single Li-ion (2.9–4.5V) and regulated 3.3V/5V rails without external level-shifting. |
| Output Voltage Range | 1.25V to VIN - adjustable via resistor divider on FB pin; enables direct generation of 1.8V, 2.5V, or 3.3V logic supplies. |
| Max Output Current | 600mA - guaranteed at VIN ≥ 2.7V and TA ≤ +85°C with LIM = IN; sufficient for CPU I/O and RF transceiver biasing. |
| Oscillator Frequency | 750kHz (±10%) - fixed-frequency PWM enables predictable EMI filtering; synchronizable to 500–1000kHz external clock. |
| Quiescent Current | 85µA in PWM/PFM mode - extends battery life in standby; drops to <0.1µA in shutdown mode. |
| Reference Accuracy | 1.25V ±1.2% - ensures ±1.3% load regulation (0–600mA) and stable feedback loop performance. |
| Efficiency | 95% peak - achieved via internal synchronous rectification; eliminates Schottky diode loss and thermal derating. |
| Duty Cycle Range | 22% to 100% - supports full dropout operation down to VIN − VOUT ≈ 280mV at 600mA load. |
Pinout & Package
The MAX1692EUB+T is housed in a space-saving 10-pin µMAX package (3mm × 3mm × 1.11mm height), thermally enhanced with exposed PGND pad for improved power dissipation in compact portable layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Supply Input | Primary power input (2.7–5.5V); requires 10µF bulk bypass to PGND for ripple suppression. |
| 2 BP | Bypass Supply | Internally tied to IN; 0.1µF ceramic capacitor to GND stabilizes internal bias rail. |
| 3 GND | Analog Ground | Reference ground for REF, FB, and control circuitry; must be star-connected to PGND at single point. |
| 4 REF | Reference Output | 1.25V ±1.2% precision reference; supplies up to 50µA; bypassed with 0.22µF to GND. |
| 5 FB | Feedback Input | Resistor-divider node sensing output voltage; high-impedance input (±50nA) enables accurate regulation. |
| 6 LIM | Current-Limit Select | Logic input selecting 600mA (LIM = IN) or 250mA (LIM = GND) peak inductor current limit. |
| 7 SYNC/PWM | Mode Control | Active-low input: GND enables PWM/PFM; IN forces fixed-frequency PWM; external clock syncs switching. |
| 8 SHDN | Shutdown Enable | Active-low control; pulls quiescent current to <0.1µA and disables all internal circuitry when grounded. |
| 9 LX | Switch Node | Connection to drains of internal P- and N-channel MOSFETs; drives external inductor; high dv/dt node. |
| 10 PGND | Power Ground | High-current return path for LX, IN, and internal switches; must be low-inductance plane connected to GND at single point. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated N-channel MOSFET replaces external Schottky diode, reducing conduction loss and enabling >95% efficiency at full load. |
| Idle Mode™ (PWM/PFM) | Automatically transitions to pulse-skipping PFM below 120mA load, cutting quiescent current from 85µA to <0.1µA in shutdown. |
| 100% Duty-Cycle Operation | Enables regulation down to VIN − VOUT ≈ 280mV at 600mA, critical for Li-ion discharge curve tracking. |
| Low-Noise Fixed-Frequency PWM | 750kHz operation with tight frequency tolerance simplifies EMI filter design and avoids sensitive IF/data bands. |
| Internal 1.25V Reference | ±1.2% accuracy over -40°C to +85°C ensures stable output voltage across battery voltage and temperature variation. |
| Four-Mode Flexibility | Forced PWM, synchronizable PWM, PWM/PFM, and shutdown modes allow optimization for noise, efficiency, or standby in diverse subsystems. |
Applications
| Cellular Phone Baseband Power | CPU I/O Supply |
|---|---|
Use Scenario: Powers 1.8V core logic and interface circuits in GSM/CDMA handsets operating from single Li-ion cell (2.9–4.5V). IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 1.8V at up to 600mA with low output ripple and fast transient response. Use Value: Enables compact PCB layout using 10-pin µMAX package and eliminates Schottky diode, reducing BOM count and thermal footprint. | Use Scenario: Supplies I/O banks of embedded microcontrollers in portable industrial terminals requiring stable 3.3V from 5V rail. IC Role / Device Role / Timing Role: Adjustable buck converter configured for 3.3V output with 1.25V reference feedback and 750kHz switching. Use Value: Delivers 95% efficiency and <1.3% load regulation across 0–600mA, minimizing heat rise in sealed enclosures. |
| Notebook Chipset Core | Handheld Terminal Transmitter Bias |
Use Scenario: Generates 2.5V supply for northbridge/southbridge logic in ultra-thin notebooks with strict height constraints (<2.4mm). IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulator operating in forced PWM mode to avoid interference with display timing signals. Use Value: 10-pin µMAX package and 1.11mm height enable integration into space-constrained motherboard regions near chipset. | Use Scenario: Provides clean, low-noise 3.3V bias to RF power amplifier stages in handheld data terminals (e.g., barcode scanners). IC Role / Device Role / Timing Role: Low-EMI buck converter in PWM/PFM mode, suppressing switching harmonics that could desensitize adjacent receiver paths. Use Value: 750kHz fundamental and harmonic-free operation in synchronizable mode prevents IF band contamination in 2.4GHz ISM systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz switching frequency, 300mA output, 2.05V–6.0V input; smaller 6-pin WSON package. | Better suited for ultra-compact, high-frequency designs where size outweighs current demand. | Select when board area is critical and load current ≤300mA; verify higher-frequency EMI compliance. |
| RT8059GJ6 | 1.5MHz operation, 600mA output, 2.5V–5.5V input; includes soft-start and power-good signal. | Preferred where system-level sequencing or fault reporting is required beyond basic regulation. | Choose when power-good assertion or controlled startup ramp is needed; note different pinout and no REF output. |
Compared with TPS62231DRVR and RT8059GJ6, the MAX1692EUB+T offers unique value in low-noise 750kHz operation, integrated 1.25V reference output, and true 100% duty-cycle capability-making it optimal for Li-ion systems needing wide input range, minimal dropout, and analog-sensitive RF environments.
Availability
MAX1692EUB+T is available at Aetrix Electronics and suitable for cellular phone baseband power, CPU I/O supplies, and handheld terminal transmitter bias requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1692EUB+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, automotive, and communications markets.
The MAX1692EUB+T belongs to Maxim's low-noise DC-DC converter product line, designed specifically for battery-powered wireless devices demanding high efficiency, small footprint, and robust EMI performance in RF-dense environments.
FAQ
What is the maximum output current capability of the MAX1692EUB+T?
The MAX1692EUB+T guarantees 600mA output current when the LIM pin is connected to IN and ambient temperature remains ≤+85°C. This rating assumes proper thermal layout with adequate copper pour on the PGND pad. At elevated temperatures or with LIM = GND, the current limit reduces to 250mA. The device internally limits peak inductor current to protect against overload conditions.
Does the MAX1692EUB+T require an external Schottky diode?
No, the MAX1692EUB+T does not require an external Schottky diode. It integrates both a P-channel high-side switch and an N-channel synchronous rectifier, enabling high-efficiency operation (>95% peak) without external diode losses or associated thermal management. This reduces BOM count, PCB area, and overall system cost.
How does the MAX1692EUB+T achieve 100% duty-cycle operation?
The MAX1692EUB+T achieves 100% duty-cycle operation through its slope-compensated current-mode PWM architecture, which allows the maximum on-time to exceed one oscillator period. When input voltage approaches output voltage, the P-channel MOSFET remains continuously on, resulting in dropout voltage equal to IOUT × RDS(ON) (≈280mV at 600mA), enabling regulation deep into battery discharge.
What are the operating modes supported by the MAX1692EUB+T?
The MAX1692EUB+T supports four distinct operating modes: forced PWM (SYNC/PWM = IN), synchronizable PWM (external clock 500–1000kHz), PWM/PFM Idle Mode™ (SYNC/PWM = GND), and shutdown (SHDN = GND). Mode selection is controlled entirely by logic-level inputs-no external components or configuration registers are required.
Can the MAX1692EUB+T be used with a 1.8V output in a cellular phone application?
Yes, the MAX1692EUB+T is commonly used to generate 1.8V outputs in cellular phones. Using the FB pin with a resistor divider (e.g., R1 = 138kΩ, R2 = 301kΩ), it regulates precisely from a 2.7–4.5V Li-ion input. Its low quiescent current in PWM/PFM mode and 750kHz low-noise switching make it ideal for powering baseband processors without interfering with RF sections.
MAX1692EUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 750kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX1692EUB+T FAQ
1.How can I place an order for MAX1692EUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1692EUB+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 MAX1692EUB+T reliable?
The price and inventory of MAX1692EUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1692EUB+T is usually 5 days.
3.What payment methods are accepted for MAX1692EUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1692EUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1692EUB+T?
MAX1692EUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1692EUB+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 MAX1692EUB+T?
For technical support, including MAX1692EUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1692EUB+T requirements.
6.How does Aetrix verify that MAX1692EUB+T is sourced from the original manufacturer or authorized distributors?
All MAX1692EUB+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 MAX1692EUB+T meets industry standards.
7.What is the process for return or replacement of MAX1692EUB+T?
All MAX1692EUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1692EUB+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 MAX1692EUB+T part is unused and in its original packaging.
Return procedure for MAX1692EUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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