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Analog Devices Inc./Maxim Integrated MAX77504AAWE+T
- Part No.:
- MAX77504AAWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, WLBGA
- Datasheet:
-
MAX77504AAWE+T.pdf
- Description:
- IC REG BUCK ADJ 3A 16WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,281
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Product details
Overview
MAX77504AAWE+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 MAX77504AAWE+T datasheet, MAX77504AAWE+T pinout, MAX77504AAWE+T application, or MAX77504AAWE+T equivalent, key selection factors include its dual-package availability (16-bump WLP or 12-lead FC2QFN), FPWM/SYNC pin for external clock synchronization, 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 MAX77504AAWE+T implements a peak current-mode PWM control architecture with fixed-frequency (0.5–1.5MHz) or SKIP-mode operation, enabling precise inductor current regulation per switching cycle and inherent line-voltage feedforward compensation. Its high-gain internal compensation eliminates need for external loop components.
It integrates a dedicated VL regulator that auto-switches between SUP and OUT inputs based on output voltage level (>1.7V), reducing system IQ by powering internal circuitry from VOUT when possible. The FPWM/SYNC pin supports both forced-PWM mode activation and external clock synchronization within validated frequency windows tied to selected switching frequency bits (FSW[1:0]).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.6V to 14V - supports direct connection to 2S/3S Li-ion packs without pre-regulation. |
| Output Current | 3A continuous - sufficient for core power rails in portable scanners, POS terminals, and DSLR camera sensor subsystems. |
| Output Voltage Range | 0.6V to 6V - programmable via external resistor divider to match SoC I/O or core voltage requirements. |
| Switching Frequency | 0.5MHz to 1.5MHz (fixed) or 1.2–1.7kHz (SKIP mode) - enables optimization of size vs. light-load efficiency trade-off. |
| Quiescent Current | 10μA at 12VIN/1.8VOUT - minimizes standby power loss in always-on battery-backed systems. |
| Protection Features | Cycle-by-cycle current limit, thermal shutdown (+165°C), UVLO (2.5V threshold), 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) - supports ultra-compact PCB layouts. |
Pinout & Package
MAX77504AAWE+T is available in a 16-bump wafer-level package (WLP), 1.7mm × 1.7mm × 0.7mm, 0.4mm bump pitch, with non-HDI routability for all bumps except POK. Pin functions are defined per the 4×4 bump array layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | High-side FET driver supply | Requires 0.22μF ceramic capacitor to LX; critical for gate drive integrity and efficiency. |
| SUP | Buck supply input | Primary power input (2.6–14V); must be bypassed with 10μF ceramic capacitor near IC. |
| LX | Switching node | Connects to external inductor; high-impedance when disabled; carries full switching current. |
| PGND | Power ground | Low-impedance return path for high-current switching loop; separate from AGND. |
| EN | Enable input | Logic-controlled startup/shutdown; compatible with SUP voltage domain (VEN_HI = 1.1V). |
| FPWM/SYNC | Mode control & sync input | Drives forced-PWM or SKIP mode; accepts external clock for synchronization within validated fSYNC windows. |
| POK | Open-drain Power-OK output | Monitors VOUT quality (92% threshold); requires external pull-up resistor (10–100kΩ). |
| VL | Internal low-voltage supply | Auto-switches between SUP and OUT above 1.7V; powers internal circuitry; bypass with 2.2μF capacitor. |
| FB | Feedback sense input | High-impedance (0.02μA) input for resistor-divider-based output voltage setting; sensitive to EMI. |
| SEL | Configuration selection | Resistor-programmable pin for switching frequency, gain, and active discharge enable (±1% RSEL required). |
| OUT | Output voltage sense | Direct connection point to output capacitor; used for accurate remote sensing and active discharge control. |
| AGND | Quiet analog ground | Reference for FB, VL, SEL; must be connected to PGND on PCB but kept noise-isolated in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ SKIP mode | 10μA typical supply current at 12VIN/1.8VOUT extends battery life in standby and low-power states. |
| Integrated VL regulator | Automatically powers internal circuitry from VOUT when >1.7V, eliminating need for external LDO and reducing system IQ. |
| External clock synchronization | FPWM/SYNC pin accepts external clock within validated frequency bands (e.g., 0.526–0.920MHz for 0.75MHz base), enabling deterministic EMI reduction. |
| Programmable configuration via SEL | RSEL resistor sets switching frequency (0.5/0.75/1.0/1.5MHz), gain, and active discharge option - no firmware or register writes needed. |
| Robust protection suite | Cycle-by-cycle current limit, thermal shutdown (+165°C), UVLO (2.5V), hiccup-mode short-circuit response, and soft-start ensure safe startup and fault recovery. |
| Small-footprint packaging | 16-bump WLP (1.7mm × 1.7mm) or 12-lead FC2QFN (2.5mm × 2.5mm) enables space-constrained designs in professional radios and portable scanners. |
Applications
| Handheld Computers | Mirrorless Cameras |
|---|---|
Use Scenario: Core power rail for ARM-based application processors and memory subsystems in ruggedized field tablets. IC Role / Device Role / Timing Role: Primary 3A buck regulator delivering stable 1.2V or 1.8V core voltage with fast transient response. Use Value: 94% peak efficiency at 3.3VOUT and 10μA IQ in SKIP mode directly extend battery runtime during intermittent compute bursts. |
Use Scenario: Powering image sensor and ISP in compact mirrorless camera bodies where board area is severely constrained. IC Role / Device Role / Timing Role: High-density 3A buck supplying 2.5V or 3.3V to sensor interface and analog front-end circuits. Use Value: 1.7mm × 1.7mm WLP package enables placement adjacent to sensor module; FPWM/SYNC allows EMI alignment with sensor readout timing. |
| POS Terminals | Professional Radios |
Use Scenario: Main 3.3V/5V supply for barcode scanner, display, and secure element in battery-operated retail terminals. IC Role / Device Role / Timing Role: Single-chip buck solution replacing discrete regulators and LDOs for multi-rail generation. Use Value: Integrated VL regulator reduces component count; active discharge via SEL-configurable RAD ensures rapid power-down during sleep transitions. |
Use Scenario: Power management for RF transceiver and digital baseband in TETRA/DPMR handheld radios operating from 7.4V 2S Li-ion packs. IC Role / Device Role / Timing Role: Input-stage buck converting 7.4V pack voltage to 3.3V/5V system rails with low-noise operation. Use Value: 0.5–1.5MHz selectable switching frequency avoids interference with 400–500MHz RF bands; thermal shutdown protects against enclosure overheating. |
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, 2.7–6V input, 0.6–5.5V output, 1.8MHz fixed freq, 1.2μA IQ in DCM mode; 2.0mm × 2.0mm QFN-11 | Narrower input range limits use with 3S Li-ion; higher switching frequency reduces inductor size but increases EMI risk near RF sections. | Preferred for space-constrained 2S-only designs needing higher fSW; not suitable for 12V input or ultra-low-IQ standby. |
| RTQ2132BGQW | 3A, 2.7–16V input, 0.6–5.5V output, 0.5–2.2MHz adjustable fSW, 15μA IQ; 2.5mm × 2.5mm QFN-13 | Higher IQ than MAX77504AAWE+T (15μA vs. 10μA); no integrated VL regulator - requires external bias supply for logic. | Acceptable for 3S battery apps requiring wider VIN; adds BOM cost and layout complexity due to missing VL integration. |
Compared with TPS62864DLCR and RTQ2132BGQW, the MAX77504AAWE+T uniquely combines 2.6–14V input support, 10μA IQ, integrated VL regulator, and dual WLP/QFN packaging - making it optimal for 2S/3S portable devices demanding minimal footprint and maximum battery longevity.
Availability
MAX77504AAWE+T is available at Aetrix Electronics and suitable for handheld computers, mirrorless cameras, and POS terminals requiring stable component supply across long production lifecycles and varying battery configurations.
Supply support for MAX77504AAWE+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 MAX77504 belongs to Maxim's high-efficiency portable power management portfolio, engineered specifically for space- and battery-life-constrained 2S/3S Li-ion devices such as professional radios and imaging equipment.
FAQ
What is the recommended input capacitor for MAX77504AAWE+T?
The MAX77504AAWE+T requires a 10μF ceramic capacitor placed as close as possible to the SUP and PGND pins. This capacitor stabilizes the input voltage during high di/dt switching events and prevents instability caused by parasitic inductance in the input path. X5R or X7R dielectrics with 10V or higher voltage rating are recommended to maintain capacitance under DC bias.
Does MAX77504AAWE+T support external clock synchronization?
Yes, the MAX77504AAWE+T supports external clock synchronization via the FPWM/SYNC pin, but only for variants explicitly listed in the Ordering Information as including this feature. Valid synchronization frequencies depend on the configured switching frequency (e.g., 0.526–0.920MHz for 0.75MHz base). Always verify synchronization capability for the specific MAX77504AAWE+T orderable part number.
How does the VL regulator in MAX77504AAWE+T reduce system IQ?
The VL regulator in MAX77504AAWE+T automatically switches its input source from SUP to VOUT when the output voltage exceeds 1.7V. This allows internal circuitry to be powered from the regulated output instead of the higher-input battery voltage, significantly lowering quiescent current - achieving just 10μA at 12VIN/1.8VOUT. No external components are required for this function.
What is the purpose of the SEL pin on MAX77504AAWE+T?
The SEL pin on MAX77504AAWE+T accepts a ±1% resistor to ground to configure three key parameters: switching frequency (0.5/0.75/1.0/1.5MHz), gain setting for current-sense amplification, and enable/disable of active discharge. This resistor-based configuration eliminates the need for I²C programming or external logic, simplifying design and improving reliability in resource-constrained systems.
Can MAX77504AAWE+T operate with a 12V input and 1.2V output?
Yes, the MAX77504AAWE+T supports 12V input and 1.2V output. Its 2.6–14V input range and 0.6–6V adjustable output range fully cover this combination. At 12VIN/1.2VOUT, the device operates with ~75% duty cycle in FPWM mode and maintains high efficiency using its synchronous rectification and low-RDS(on) MOSFETs (50mΩ high-side, 27mΩ low-side typical).
MAX77504AAWE+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)
MAX77504AAWE+T FAQ
1.How can I place an order for MAX77504AAWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77504AAWE+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 MAX77504AAWE+T reliable?
The price and inventory of MAX77504AAWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77504AAWE+T is usually 5 days.
3.What payment methods are accepted for MAX77504AAWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77504AAWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77504AAWE+T?
MAX77504AAWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77504AAWE+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 MAX77504AAWE+T?
For technical support, including MAX77504AAWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77504AAWE+T requirements.
6.How does Aetrix verify that MAX77504AAWE+T is sourced from the original manufacturer or authorized distributors?
All MAX77504AAWE+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 MAX77504AAWE+T meets industry standards.
7.What is the process for return or replacement of MAX77504AAWE+T?
All MAX77504AAWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77504AAWE+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 MAX77504AAWE+T part is unused and in its original packaging.
Return procedure for MAX77504AAWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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