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Analog Devices Inc./Maxim Integrated MAX8939AEWV+T
- Part No.:
- MAX8939AEWV+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 30-WFBGA, WLBGA
- Datasheet:
-
MAX8939AEWV+T.pdf
- Description:
- IC REG CHARGE PUMP 7OUT 30WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,843
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Product details
Overview
MAX8939AEWV+T from Maxim Integrated is a highly integrated power management IC (PMIC) designed as a companion chip for Intel Mobile Communications (IMC) 61XX 3G platform smartphones. It integrates a thermally regulated Li+ charger (850mA max fast-charge), four programmable LDOs (400/200/200/100mA), dual step-up converters (5V/700mA and 28V/60mA), vibrator driver (200mA, 70-step PWM), and two 25mA LED current regulators - all in a 30-bump WLP package.
For engineers reviewing the MAX8939AEWV+T datasheet, MAX8939AEWV+T pinout, MAX8939AEWV+T application, or MAX8939AEWV+T equivalent, key selection considerations include its 4.1V–6.25V CHG_IN input range with OVP, I²C-programmable LDO output voltages (1.7–3.2V), 2MHz fixed-frequency switching, and dedicated PWR_ON_CMP and IRQ signals for baseband processor control in mobile handset designs.
Technical Context
The MAX8939AEWV+T implements a multi-rail PMIC architecture optimized for Intel 61XX baseband platforms, featuring independent I²C-controlled regulation domains: a linear Li+ charger with proprietary die-temperature regulation (default thermal limit +100°C), dual synchronous boost converters (OUT1 for audio/camera flash, OUT2 for display/backlight), and four low-noise LDOs with 65dB PSRR and 45µVRMS noise.
Its control interface includes hardware pins (RESET_IN, CHG, LDO1_EN) and an I²C bus (SCL/SDA) supporting register-level configuration of charging parameters (fast-charge current, top-off threshold), LDO enable states/output voltages, vibrator speed/voltage, and LED dimming curves - enabling full system power sequencing and dynamic power management without external microcontroller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charger Input Range | 4.1V to 6.25V with overvoltage protection up to 28V - enables safe USB/adapter input while disabling charging above 6.75V |
| Fast-Charge Current | Up to 850mA RMS (MAX8939A variant) - programmable in 8 steps via I²C for precise battery profile control |
| OUT1 Boost Output | 3.5V–5.0V (16-step I²C programmable), 700mA guaranteed - powers external audio amplifiers or camera flash circuits |
| OUT2 WLED Boost | Up to 28V output, 60mA current - drives keypad and display backlight with integrated nMOS switch and 2MHz fixed switching |
| LDO Outputs | Four independent LDOs: 1×400mA (LDO1), 2×200mA (LDO2/LDO3), 1×100mA (LDO4); all programmable 1.7–3.2V in 100mV steps |
| Vibrator Driver | 200mA guaranteed output, 70-step PWM speed control, 1.3V/2.5V/3V/INVIB selectable voltage - supports haptic feedback with active brake |
| Package | 30-bump wafer-level package (WLP), 2.5mm × 3.0mm × 0.65mm max height - ultra-compact footprint for space-constrained mobile PCBs |
Pinout & Package
MAX8939AEWV+T uses a 30-bump WLP (0.5mm pitch) with exposed thermal pad on bottom. Pin functions are defined by bump position (A1–E6 grid). Power grounds (PGND1, PGND2, AGND) must be connected to a common PCB ground plane; critical analog nodes (REF, COMP1, COMP2) require specified ceramic bypass capacitors per datasheet layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | PGND2 | Power ground for WLED boost converter - must be low-impedance connection to PCB ground plane |
| A2 | LX2 | Switching node for OUT2 WLED boost - connects to inductor; requires tight layout to minimize EMI |
| A4 | OUT1 | 5V step-up converter output - supplies audio amplifier or camera flash; requires 2.2µF output capacitor |
| B3 | RESET_IN | Active-low hardware reset - pulses low to restore default register states (except STATUS/EVENT) |
| B5 | LDO1_EN | Hardware enable for 400mA LDO1 - overrides I²C control until next reset |
| D2 | OUTVIB | Vibrator motor output - delivers 200mA PWM drive; requires 1µF ceramic capacitor to ground |
| E1 | CHG_IN | Charger input supply - accepts 4.1–6.25V with 28V absolute max; powers SAFE_OUT and charger circuitry |
| E4 | BATT | Battery connection and main IC supply - connects to single-cell Li+ battery; requires 10µF ceramic bypass |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary thermal regulation | Die temperature limited to +100°C (default) during fast-charge - prevents thermal damage without external sensors or firmware |
| I²C-programmable LED dimming | 128-step pseudo-log dimming with independent ramp-up/ramp-down timers - enables smooth backlight transitions |
| SAFE_OUT protected LDO | Fixed 4.9V output with input overvoltage protection - safely powers USB transceivers and precharge indicator LEDs |
| Integrated charge current monitor | Analog CHG_MON output (2.666mV/mA) - provides real-time fast-charge current feedback to host ADC without external sense resistor |
| Baseband control interface | Dedicated PWR_ON_CMP open-drain output and IRQ interrupt - enables direct handshaking with Intel 61XX baseband processor |
Applications
| Smartphone Baseband Power Companion | Mobile Display & Keypad Backlight |
|---|---|
Use Scenario: Powering Intel IMC 61XX 3G platform in mid-tier smartphones with integrated RF, audio, and sensor subsystems. IC Role / Device Role / Timing Role: Central PMIC providing sequenced, regulated rails (LDOs, boost, charger) and real-time battery management signals to baseband processor. Use Value: Eliminates need for discrete power components; reduces BOM count by >15 parts while enabling full I²C-based power policy control. |
Use Scenario: Driving white LED strings for front-panel keypad illumination and LCD display backlight in compact handsets. IC Role / Device Role / Timing Role: High-voltage (28V) WLED boost converter (OUT2) with dual 25mA current regulators (LED1/LED2) for independent string control. Use Value: Achieves >90% efficiency at 25.25mA/string with 2MHz switching - minimizes inductor size (4.7–10µH) and thermal footprint. |
| USB-Compliant Charging Interface | Haptic Feedback System |
Use Scenario: Enabling safe, standards-compliant USB charging in devices with low-voltage-rated USB PHYs. IC Role / Device Role / Timing Role: SAFE_OUT LDO delivers regulated 4.9V from CHG_IN with built-in overvoltage protection (6.25V trip) and 100mA current capability. Use Value: Protects USB transceiver ICs from adapter overvoltage events without external TVS diodes or regulator ICs. |
Use Scenario: Delivering programmable vibration intensity and duration for user notifications and tactile feedback. IC Role / Device Role / Timing Role: Vibrator driver (OUTVIB) with 70-step PWM speed control, 4 selectable output voltages, and active stop brake. Use Value: Enables precise haptic profiles (e.g., short buzz vs. sustained rumble) with <85ms brake duration - improves user experience fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8939EWV+T | Higher CHG_IN range (4.1–10V), 1.3A max fast-charge current, no input OVP clamp at 6.25V | Suitable for legacy USB adapters or higher-voltage wall chargers where 6.25V OVP is unnecessary | Select MAX8939EWV+T only if design requires >6.25V input tolerance and higher charge current; not drop-in compatible due to different OVP thresholds |
| MAX8939BEWV+T | Identical CHG_IN range and OVP (4.1–6.25V) but different factory-programmed BATT regulation voltages (e.g., 4.17V vs. 4.15V default) | Targeted for battery chemistries requiring tighter voltage tolerance or alternate charge termination points | Use MAX8939BEWV+T when BATT regulation accuracy at +25°C must be ±0.021V instead of ±0.031V; pinout and I²C register map are identical |
Compared with MAX8939AEWV+T, the MAX8939EWV+T supports wider input voltage range but lacks 6.25V OVP clamping, while the MAX8939BEWV+T offers tighter battery voltage regulation tolerance - both share identical pinout, LDO/boost/vibrator functionality, and thermal regulation architecture.
Availability
MAX8939AEWV+T is available at Aetrix Electronics and suitable for smartphone baseband power management, mobile display backlighting, USB-compliant charging interfaces, and haptic feedback systems requiring stable component supply across high-volume production cycles.
Supply support for MAX8939AEWV+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 solutions for portable, industrial, and communications applications.
The MAX8939 family is designed specifically for Intel 61XX 3G platform smartphones, integrating all essential power rails, battery charging, and peripheral drivers into a single WLP package to reduce PCB area and simplify system-level power architecture.
FAQ
What is the maximum fast-charge current supported by the MAX8939AEWV+T?
The MAX8939AEWV+T supports a maximum fast-charge current of 850mA RMS. This value is programmable in eight discrete steps via the I²C interface using the CHG_CONTROL_A.FAST_CHARGE register bits. The actual current depends on the programmed setting and battery voltage - for example, code '101b' delivers 850mA at VBATT = 3.5V. Thermal regulation automatically reduces current if junction temperature exceeds the configured limit (+100°C default).
Does the MAX8939AEWV+T include hardware-based overvoltage protection on the CHG_IN pin?
Yes, the MAX8939AEWV+T includes hardware overvoltage protection (OVP) on CHG_IN with a trip threshold of 6.25V to 6.75V (typical 6.5V) and 200mV hysteresis. When CHG_IN exceeds this threshold, both the SAFE_OUT LDO and the battery charger are disabled immediately. This protection operates independently of I²C control and remains active even during shutdown, ensuring robust safety for USB-powered systems.
How many LDO outputs does the MAX8939AEWV+T provide, and what are their current capabilities?
The MAX8939AEWV+T provides four independent LDO outputs: LDO1 (400mA), LDO2 (200mA), LDO3 (200mA), and LDO4 (100mA). All are programmable from 1.7V to 3.2V in 100mV steps via I²C. LDO1 can also be enabled/disabled using the hardware LDO1_EN pin, while the others are controlled exclusively through the I²C interface. Each LDO features low dropout (≤400mV at rated load) and high PSRR (60–65dB).
Can the MAX8939AEWV+T drive white LED strings for display backlighting?
Yes, the MAX8939AEWV+T includes a dedicated WLED step-up converter (OUT2) capable of delivering up to 28V at 60mA. It integrates an nMOS power switch and supports two independent 25mA LED current regulators (LED1 and LED2) with 128-step pseudo-log dimming and programmable ramp timing. This allows simultaneous driving of two LED strings - ideal for keypad and display backlighting in smartphones.
What is the function of the PWR_ON_CMP pin on the MAX8939AEWV+T?
The PWR_ON_CMP pin on the MAX8939AEWV+T is an open-drain output used to wake a sleeping Intel 61XX baseband processor when a charger is connected. It pulses low during charger presence detection and remains asserted until the charger is removed. This signal eliminates the need for external wake-up circuitry and enables seamless integration with the platform's power management firmware for automatic system boot on plug-in.
MAX8939AEWV+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 30-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Charge Pump, Wireless Devices
- Voltage - Input:
- 2.9V ~ 5.5V
- Number of Outputs:
- 7
- Voltage - Output:
- Multiple
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 30-WLP
MAX8939AEWV+T FAQ
1.How can I place an order for MAX8939AEWV+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8939AEWV+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 MAX8939AEWV+T reliable?
The price and inventory of MAX8939AEWV+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8939AEWV+T is usually 5 days.
3.What payment methods are accepted for MAX8939AEWV+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8939AEWV+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8939AEWV+T?
MAX8939AEWV+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8939AEWV+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 MAX8939AEWV+T?
For technical support, including MAX8939AEWV+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8939AEWV+T requirements.
6.How does Aetrix verify that MAX8939AEWV+T is sourced from the original manufacturer or authorized distributors?
All MAX8939AEWV+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 MAX8939AEWV+T meets industry standards.
7.What is the process for return or replacement of MAX8939AEWV+T?
All MAX8939AEWV+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8939AEWV+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 MAX8939AEWV+T part is unused and in its original packaging.
Return procedure for MAX8939AEWV+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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