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Analog Devices Inc./Maxim Integrated MAX77504BAWE+T
- Part No.:
- MAX77504BAWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX77504BAWE+T.pdf
- Description:
- IC REG BUCK ADJ 3A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:445
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Product details
Overview
MAX77504BAWE+T from Maxim Integrated is a synchronous 3A step-down DC-DC converter optimized for 2- or 3-cell Li+/Li-ion battery-powered portable electronics. It operates from 2.6V to 14V input, delivers adjustable 0.6V–6V output, achieves 94% peak efficiency at 7.4VIN/3.3VOUT, and features ultra-low 10μA quiescent current in SKIP mode - enabling extended runtime in handheld computers and mirrorless cameras.
For engineers reviewing the MAX77504BAWE+T datasheet, MAX77504BAWE+T pinout, MAX77504BAWE+T application, or MAX77504BAWE+T equivalent, key selection criteria include its dual-package availability (WLP/FC2QFN), FPWM/SYNC clock synchronization capability, integrated VL regulator with automatic SUP→OUT switchover above 1.7V, and cycle-by-cycle current limiting with hiccup-mode short-circuit protection.
Technical Context
The MAX77504BAWE+T implements a peak current-mode PWM control architecture with fixed-frequency switching (0.5MHz–1.5MHz) selectable via RSEL. Its high-gain internal compensation eliminates external compensation components while maintaining stability across wide input/output ranges and load transients.
It integrates dedicated hardware control pins: EN for direct enable/disable, POK for output voltage monitoring with 90–94% rising/falling thresholds, and FPWM/SYNC supporting both forced-PWM operation and external clock synchronization within validated frequency bands (e.g., ±10% of nominal fSW). The VL regulator powers internal circuitry from either SUP or OUT depending on VOUT level, reducing system IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports high-power subsystems like image sensors or RF transceivers in space-constrained devices. |
| Input Voltage Range | 2.6V to 14V - accommodates fully discharged to fully charged 2-cell (2.4V–8.4V) and 3-cell (3.6V–12.6V) Li-ion batteries. |
| Output Voltage Range | 0.6V to 6V - programmable via external resistor divider to match core logic, memory, or analog supply requirements. |
| Quiescent Current | 10μA at 12VIN/1.8VOUT - enables multi-week standby in always-on portable equipment without compromising light-load efficiency. |
| Switching Frequency | 0.5MHz to 1.5MHz (4 selectable options) - balances EMI suppression, inductor size, and efficiency for compact PCB layouts. |
| Protection Features | Cycle-by-cycle current limit (4A peak), thermal shutdown (+165°C), UVLO (2.5V threshold), and hiccup-mode short-circuit response - ensures robust operation under fault conditions. |
| Package Options | 16-bump WLP (1.7mm × 1.7mm, 0.4mm pitch) or 12-lead FC2QFN (2.5mm × 2.5mm, 0.5mm pitch) - both support non-HDI routing for cost-sensitive designs. |
Pinout & Package
MAX77504BAWE+T is available in two package variants: a 16-bump wafer-level package (WLP, code W161L1+1) measuring 1.7mm × 1.7mm × 0.7mm, and a 12-lead flip-chip QFN (FC2QFN, code F122A2F+2) measuring 2.5mm × 2.5mm × 0.6mm. Both packages are RoHS-compliant and optimized for thermal performance on standard four-layer PCBs (θJA = 57.9°C/W for WLP, 70.2°C/W for FC2QFN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | High-side gate driver bootstrap supply | Requires 0.22μF ceramic capacitor to LX; enables efficient high-side MOSFET drive without external charge pump. |
| SUP | Main power input | 2.6V–14V supply rail; bypassed with 10μF ceramic capacitor near IC for low-impedance path during high di/dt switching events. |
| LX | Switching node | Connects to external inductor; high-impedance when disabled; carries pulsed current up to 3.2A RMS. |
| PGND | Power ground | Low-impedance return path for high-current switching loop; must be connected directly to AGND on PCB. |
| EN | Enable control input | Logic-compatible with SUP domain; >1.1V enables converter, <0.4V disables with soft-start reset. |
| FPWM/SYNC | Mode control & synchronization input | Drives forced-PWM mode or accepts external clock signal (valid range depends on configured fSW); not all variants support SYNC. |
| POK | Open-drain power-good output | Asserts high when VOUT reaches 90–94% of target; requires external 10kΩ–100kΩ pullup; used for system sequencing. |
| VL | Internal low-voltage supply | Auto-switches between SUP and OUT (above 1.7V); powers internal logic; bypassed with 2.2μF ceramic capacitor to AGND. |
| FB | Feedback voltage sense | Monitors resistive divider output; 0.6V reference accuracy ±1.2% over temp; sensitive to noise - routed away from noisy traces. |
| OUT | Output voltage sense point | Connected directly to output capacitor; provides accurate remote sensing for load regulation without adding series resistance. |
| SEL | Configuration selection input | Resistor-to-AGND sets switching frequency, gain, and active discharge option; ±1% tolerance required for precise configuration. |
| AGND | Analog ground reference | Quiet ground for feedback and bias circuits; tied to PGND at single point on PCB to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ SKIP mode | 10μA typical supply current at 12VIN/1.8VOUT extends battery life in always-on portable systems without sacrificing transient response. |
| Integrated VL regulator | Automatically switches power source from SUP to OUT when VOUT > 1.7V, eliminating need for external LDO and reducing system IQ by ~30%. |
| Configurable switching frequency | Four factory-set options (0.5/0.75/1.0/1.5MHz) selected via RSEL - enables optimization of inductor size, efficiency, and EMI profile per design. |
| Active discharge support | Configurable via RSEL; engages 100Ω internal resistor between OUT and PGND when disabled - prevents residual voltage hold-up in safety-critical applications. |
| Robust protection suite | Cycle-by-cycle current limit, thermal shutdown with 15°C hysteresis, UVLO, and hiccup-mode short-circuit response ensure reliable operation across industrial temperature range (-40°C to +125°C). |
Applications
| Handheld Professional Radio | Mirrorless Camera Power System |
|---|---|
Use Scenario: Compact UHF/VHF transceiver requiring stable 3.3V and 1.8V rails from 7.4V nominal 2-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3A at 3.3V for RF front-end and baseband processor; secondary 1.8V rail generated via downstream LDO. Use Value: 94% peak efficiency minimizes heat generation in sealed enclosure; 10μA SKIP mode enables weeks-long standby without battery drain. |
Use Scenario: High-resolution CMOS image sensor and FPGA-based image processing unit powered by 10.8V nominal 3-cell Li-ion battery. IC Role / Device Role / Timing Role: Main 5V/3A power stage for sensor bias and interface logic; configured at 1.5MHz to shrink inductor footprint in tight camera body. Use Value: Fast transient response maintains clean 5V rail during burst capture; POK signal sequences sensor initialization and FPGA configuration. |
| POS Terminal Core Supply | Portable Medical Scanner |
Use Scenario: Battery-backed retail terminal needing reliable 5V/2.5A and 3.3V/1.5A outputs from 7.4V 2-cell pack during AC outage. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete buck + LDO; SEL-configured for 1MHz switching to balance efficiency and EMI compliance. Use Value: Built-in short-circuit hiccup mode prevents thermal runaway during accidental probe short; UVLO avoids brownout-induced data corruption. |
Use Scenario: Hand-carried ultrasound scanner requiring low-noise 1.2V core supply for ADC and DSP, derived from 10.8V 3-cell battery. IC Role / Device Role / Timing Role: Precision 1.2V/3A buck stage with FB accuracy ±1.2%; VL auto-switchover reduces total system IQ below 15μA. Use Value: Low EMI at 0.75MHz switching frequency avoids interference with sensitive analog front-end; AGND/PGND separation improves SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62864DLCR | 3A, 2.7V–6V input, fixed 3.3V output; no adjustable VOUT, no FPWM/SYNC, smaller 1.2mm × 0.8mm WLP package. | Best suited for cost-sensitive, fixed-output designs where flexibility and synchronization are unnecessary. | Select only if output voltage is fixed at 3.3V and board space is extremely constrained; lacks MAX77504BAWE+T's wide input range and configurability. |
| RTQ2132BWGE | 3A, 2.7V–17V input, 0.6V–5.5V adjustable output; includes I2C interface for dynamic voltage scaling; larger 3mm × 3mm QFN. | Preferred for systems requiring real-time VOUT adjustment (e.g., adaptive core voltage scaling) and higher input voltage margin. | Choose when digital control and wider input range outweigh the need for ultra-low IQ and compact WLP footprint. |
Compared with TPS62864DLCR and RTQ2132BWGE, the MAX77504BAWE+T uniquely combines ultra-low 10μA quiescent current, 2.6V–14V input flexibility, hardware-configurable switching frequency, and dual-package scalability - making it optimal for battery-life-critical portable imaging and communication devices.
Availability
MAX77504BAWE+T is available at Aetrix Electronics and suitable for handheld radios, mirrorless cameras, POS terminals, portable scanners, and medical imaging devices requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX77504BAWE+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, designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and portable applications.
The MAX77504BAWE+T belongs to Maxim's high-efficiency portable power management portfolio, engineered specifically for space- and battery-life-constrained Li-ion systems requiring robust, configurable DC-DC conversion without external compensation.
FAQ
What is the maximum output current capability of the MAX77504BAWE+T?
The MAX77504BAWE+T delivers up to 3A continuous output current under typical operating conditions. Its internal high-side and low-side DMOS switches feature on-resistances of 50mΩ and 27mΩ respectively at 1.8VVL, enabling high efficiency while sustaining full load across the -40°C to +125°C junction temperature range. Peak current limit is specified at 4A for cycle-by-cycle protection.
Does the MAX77504BAWE+T support external clock synchronization?
Yes, the MAX77504BAWE+T supports external clock synchronization via the FPWM/SYNC pin, but only on variants explicitly enabled for this feature - confirmed by ordering code suffixes in the official datasheet. When enabled, it accepts external clocks within ±10% of the configured nominal switching frequency (e.g., 0.475–0.525MHz for 0.5MHz mode), allowing precise timing alignment in multi-rail systems.
How does the VL regulator in the MAX77504BAWE+T reduce system quiescent current?
The VL regulator in the MAX77504BAWE+T automatically switches its power source from SUP to OUT when VOUT exceeds 1.7V, eliminating the need for an external LDO. This design reduces total system IQ by ~30% compared to solutions using discrete regulators, as VL draws only 10μA from the main supply at light loads - a key advantage for battery-operated devices requiring multi-week standby.
What package options are available for the MAX77504BAWE+T, and how do they differ thermally?
The MAX77504BAWE+T is offered in two packages: a 16-bump WLP (1.7mm × 1.7mm, θJA = 57.9°C/W) and a 12-lead FC2QFN (2.5mm × 2.5mm, θJA = 70.2°C/W), both rated for 1381mW and 1139mW max power dissipation respectively on a four-layer board. The WLP offers superior thermal performance and smaller footprint; the FC2QFN provides easier assembly and test access.
Can the MAX77504BAWE+T be used with a 2-cell Li-ion battery without external supervision?
Yes, the MAX77504BAWE+T is explicitly optimized for 2-cell (2.4V–8.4V) and 3-cell (3.6V–12.6V) Li-ion battery operation. Its 2.6V–14V input range covers full battery discharge to charge cycles, and built-in UVLO (2.5V threshold with 300mV hysteresis) prevents malfunction during deep discharge - enabling standalone use without additional battery supervision circuitry.
MAX77504BAWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFBGA, WLBGA
- 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):
- 2.6V
- Voltage - Input (Max):
- 14V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz ~ 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLP (1.69x1.69)
MAX77504BAWE+T FAQ
1.How can I place an order for MAX77504BAWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77504BAWE+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 MAX77504BAWE+T reliable?
The price and inventory of MAX77504BAWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77504BAWE+T is usually 5 days.
3.What payment methods are accepted for MAX77504BAWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77504BAWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77504BAWE+T?
MAX77504BAWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77504BAWE+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 MAX77504BAWE+T?
For technical support, including MAX77504BAWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77504BAWE+T requirements.
6.How does Aetrix verify that MAX77504BAWE+T is sourced from the original manufacturer or authorized distributors?
All MAX77504BAWE+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 MAX77504BAWE+T meets industry standards.
7.What is the process for return or replacement of MAX77504BAWE+T?
All MAX77504BAWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77504BAWE+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 MAX77504BAWE+T part is unused and in its original packaging.
Return procedure for MAX77504BAWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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