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Analog Devices Inc./Maxim Integrated MAX1692EUB+
- Part No.:
- MAX1692EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1692EUB+.pdf
- Description:
- IC REG BUCK ADJ 600MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:965
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Product details
Overview
MAX1692EUB+ 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), operates from +2.7V to +5.5V input, features 750kHz fixed-frequency switching, and achieves 95% efficiency. It powers baseband logic and RF transmitters in cellular phones and PDAs.
For engineers reviewing the MAX1692EUB+ datasheet, MAX1692EUB+ pinout, MAX1692EUB+ application, or MAX1692EUB+ equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (Forced PWM, PWM/PFM, Shutdown), real-world efficiency curves, and cross-referenced alternatives for battery-operated portable designs.
Technical Context
The MAX1692EUB+ implements a slope-compensated current-mode PWM controller with 100% duty-cycle capability and internal P-channel/N-channel synchronous rectification-eliminating external Schottky diodes. Its multi-comparator architecture includes dedicated circuits for PWM current limiting (1.6A peak), PFM entry (120mA threshold), NEGLIM-controlled synchronous rectifier turn-off, and LIM-selectable current limits (600mA/1.2A).
It supports four distinct operational modes: Forced PWM (SYNC/PWM = IN), Synchronizable PWM (external 500–1000kHz clock), Idle Mode™ (PWM/PFM auto-switching below 120mA load), and Shutdown (<0.1µA quiescent current). The 1.25V ±1.2% reference and FB-input accuracy enable stable output regulation across 0–600mA loads with ≤1.3% load regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.7V to +5.5V - supports single Li-ion (2.9–4.2V) and regulated +3.3V/+5V rails without external LDO pre-regulation. |
| Output Current | 600mA guaranteed - sufficient for CPU I/O, baseband processors, and RF transceivers in handheld devices. |
| Switching Frequency | 750kHz fixed (±100kHz) - enables compact LC filter design with <10µH inductors and <50µF ceramic output capacitors. |
| Efficiency | 95% at 3.6V→3.3V/600mA - minimizes thermal rise in sealed portable enclosures and extends battery runtime. |
| Quiescent Current | 85µA in PWM/PFM mode - critical for standby power budget in always-on communication modules. |
| Reference Accuracy | 1.25V ±1.2% - ensures ±1.3% output voltage tolerance over temperature and line/load variations when using standard resistor dividers. |
| Duty Cycle Range | 22% to 100% - supports dropout operation down to VIN = VOUT + 280mV @ 600mA, enabling deep discharge utilization of Li-ion cells. |
Pinout & Package
MAX1692EUB+ is housed in a space-saving 10-pin µMAX package (3mm × 3mm × 1.11mm height), optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power Input | Primary supply rail (+2.7V to +5.5V); requires 10µF bulk bypass to PGND to suppress input ripple and EMI. |
| 2 BP | Bypass Supply | Internally tied to IN; 0.1µF capacitor stabilizes internal bias generation and improves transient response. |
| 3 GND | Analog Ground | Reference node for REF, FB, and control circuitry; must be star-connected to PGND at single point to avoid ground bounce. |
| 4 REF | Precision Reference | 1.25V ±1.2% output capable of sourcing/sinking 50µA; bypassed with 0.22µF to GND for noise immunity. |
| 5 FB | Voltage Feedback | Resistor-divider input sensing output voltage; 50nA input bias enables high-impedance divider networks (R2 = 5kΩ–500kΩ). |
| 6 LIM | Current Limit Select | Logic input selecting 600mA (LIM = GND) or 1.2A (LIM = IN) peak inductor current limit for overload protection. |
| 7 SYNC/PWM | Mode Control | Active-low input: GND = PWM/PFM mode; IN = Forced PWM; external clock = synchronizable PWM (500–1000kHz). |
| 8 SHDN | Shutdown Enable | Active-low control reducing total supply current to <0.1µA; output goes high-impedance during shutdown. |
| 9 LX | Switch Node | Connection to drains of internal P- and N-channel MOSFETs; carries high di/dt switching current-requires short, wide trace routing. |
| 10 PGND | Power Ground | High-current return path for LX and internal FETs; must be isolated from AGND except at single star point near GND pin. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Rectification | Integrated N-channel MOSFET eliminates Schottky diode loss, enabling >95% efficiency and no minimum load requirement. |
| Idle Mode™ (PWM/PFM) | Auto-switches to pulse-skipping PFM below 120mA load, reducing quiescent current from 85µA to <10µA in ultra-light-load scenarios. |
| 100% Duty-Cycle Operation | Enables regulation down to VIN = VOUT + (IOUT × RDS(ON)), supporting full Li-ion discharge from 4.2V to 2.7V while maintaining 1.8V output. |
| Low-Noise Fixed-Frequency PWM | 750kHz switching with tight duty-cycle control minimizes conducted EMI and simplifies EMI filter design for RF-sensitive applications. |
| Four-Mode Flexibility | Forced PWM (RF immunity), Synchronizable PWM (harmonic alignment), PWM/PFM (battery life), Shutdown (0.1µA standby) - selectable via two logic pins. |
Applications
| Cellular Phone Baseband Power | Notebook Chipset Core Supply |
|---|---|
Use Scenario: Powers ARM-based baseband processor (e.g., Qualcomm MSM series) from single Li-ion cell in slim smartphone form factor. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1.8V/600mA with fast load-transient response to handle burst-mode RF transmission. Use Value: Synchronous rectification and 95% efficiency prevent thermal throttling; 100% duty cycle extends usable battery capacity by 12% versus non-dropout regulators. | Use Scenario: Supplies core voltage to Intel/AMD chipset I/O blocks in ultraportable notebooks with strict height constraints (<2.4mm). IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter replacing discrete solutions in space-constrained motherboard VRMs. Use Value: 10-pin µMAX package and support for 10µH inductors enable complete 1.2V/500mA solution within 60mm² footprint-verified in Figure 3 reference design. |
| PDA/Handy-Terminal Logic Rail | Battery-Operated Medical Sensor |
Use Scenario: Generates stable 3.3V rail for touch-screen controller, flash memory, and Bluetooth radio in handheld data terminals. IC Role / Device Role / Timing Role: Adjustable-output buck regulator with precise 1.25V reference ensuring ±1.3% output tolerance across -40°C to +85°C industrial temperature range. Use Value: PWM/PFM mode reduces average supply current by 70% during idle polling intervals, extending AA/AAA battery life beyond 12 months. | Use Scenario: Powers low-power MCU and analog front-end in wearable ECG patch requiring continuous 24/7 operation on coin-cell or small Li-Po. IC Role / Device Role / Timing Role: Ultra-low-quiescent buck converter enabling regulated 2.5V output from declining 3.0–2.0V input without brownout. Use Value: 85µA quiescent current in active PWM/PFM mode and <0.1µA shutdown current maximize energy harvesting and battery longevity. |
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–6.5V input, 0.5µA shutdown current | Better suited for ultra-compact, high-frequency designs where board area is more constrained than current capability | Select when prioritizing minimal footprint and higher switching frequency over 600mA drive strength and Li-ion dropout performance |
| RT8059GJ6 | 1.5MHz switching, 600mA output, 2.5V–5.5V input, 22µA quiescent current, no PFM mode | Fixed PWM-only operation; lacks PWM/PFM auto-switching and 100% duty cycle for deep dropout | Select when deterministic fixed-frequency behavior is mandatory and light-load efficiency is secondary to cost and simplicity |
Compared with TPS62231DRVR and RT8059GJ6, MAX1692EUB+ uniquely combines 600mA output, 100% duty-cycle dropout, and Idle Mode™ PFM for optimal Li-ion utilization in portable RF systems-making it irreplaceable where battery runtime and RF noise coexist as primary constraints.
Availability
MAX1692EUB+ is available at Aetrix Electronics and suitable for cellular phone baseband power, notebook chipset supplies, PDA logic rails, and battery-operated medical sensors requiring stable component supply and long-term production continuity.
Supply support for MAX1692EUB+ 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 portable applications.
The MAX1692EUB+ belongs to Maxim's low-noise DC-DC converter product line, engineered specifically for RF-sensitive, battery-powered wireless devices requiring high efficiency, small size, and seamless transition between active and standby states.
FAQ
What is the maximum output current capability of the MAX1692EUB+ under typical conditions?
The MAX1692EUB+ guarantees 600mA output current when LIM is connected to IN and VIN ≥ 3.0V. At 3.6V input and 3.3V output, it sustains 600mA continuously with junction temperature maintained below 125°C using standard PCB copper pour. Peak inductor current reaches 1.6A internally, but sustained output is limited by thermal dissipation in the 10-pin µMAX package.
Does the MAX1692EUB+ support true 100% duty-cycle operation, and what is the practical dropout voltage?
Yes, the MAX1692EUB+ supports true 100% duty-cycle operation enabled by its slope-compensated current-mode architecture. At 600mA load, dropout voltage is approximately 280mV-calculated as IOUT × RDS(ON) of the internal P-channel switch (0.4Ω typical) plus inductor DCR. This allows regulation down to VIN = VOUT + 0.28V, fully utilizing Li-ion cells from 4.2V to 2.7V.
How does the SYNC/PWM pin configure the MAX1692EUB+ into Idle Mode™ (PWM/PFM), and what triggers the mode switch?
Connecting SYNC/PWM to GND configures the MAX1692EUB+ into Idle Mode™. The device automatically switches from PWM to PFM when the peak inductor current falls below 120mA-detected by the PFM current comparator. During PFM, switching occurs only as needed to maintain regulation, reducing quiescent current to 85µA and eliminating minimum load requirements.
What is the purpose of the LIM pin on the MAX1692EUB+, and how does it affect current limiting?
The LIM pin selects between two internal current-limit thresholds: connecting LIM to GND sets the peak inductor current limit to 600mA, while connecting LIM to IN raises it to 1.2A. This dual-threshold design allows designers to optimize inductor sizing and thermal performance-600mA mode suits most portable applications, while 1.2A mode supports higher transient loads or lower-RDS(ON) external FETs in custom designs.
Can the MAX1692EUB+ be synchronized to an external clock, and what is the valid frequency range?
Yes, the MAX1692EUB+ accepts external synchronization on the SYNC/PWM pin. It locks to input clocks between 500kHz and 1000kHz with negative-edge triggering. If the external signal is absent or static for >100µs, the internal oscillator defaults to 750kHz. This feature enables harmonic alignment in multi-rail systems to reduce beat frequencies and simplify EMI filtering.
MAX1692EUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX1692EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1692EUB+ 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+ reliable?
The price and inventory of MAX1692EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1692EUB+ is usually 5 days.
3.What payment methods are accepted for MAX1692EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1692EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1692EUB+?
MAX1692EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1692EUB+ 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+?
For technical support, including MAX1692EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1692EUB+ requirements.
6.How does Aetrix verify that MAX1692EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX1692EUB+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX1692EUB+?
All MAX1692EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1692EUB+, 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+ part is unused and in its original packaging.
Return procedure for MAX1692EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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