My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX8969EWL33+T
- Part No.:
- MAX8969EWL33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 9-WFBGA, WLBGA
- Datasheet:
-
MAX8969EWL33+T.pdf
- Description:
- IC REG BOOST 3.3V 900MA 9WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,224
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX8969EWL33+T from Maxim Integrated is a 1A synchronous step-up DC-DC converter in a 1.25mm × 1.25mm WLP package, designed for single-cell Li-ion battery systems requiring 3.3V output. It delivers up to 1A continuous output current with >90% efficiency, features True Shutdown™ (1µA), and supports track/automatic track modes for ultra-low quiescent current (30µA/60µA) in handheld power rails.
For engineers reviewing the MAX8969EWL33+T datasheet, MAX8969EWL33+T pinout, MAX8969EWL33+T application, or MAX8969EWL33+T equivalent, this page provides verified electrical parameters, mode-specific IQ values, validated protection thresholds (UVLO = 2.2V typ, thermal shutdown = +165°C), and confirmed WLP-9 bump mapping - all critical for portable system power architecture validation and BOM optimization.
Technical Context
The MAX8969EWL33+T employs a fixed-frequency 3MHz PWM architecture with synchronous rectification and voltage-positioning control. Its dual-path operation-boost mode (nMOS switching, pMOS off) and ATM/track mode (pMOS current-limited pass switch, nMOS off)-enables seamless transitions between high-efficiency regulation and ultra-low-IQ battery-sourcing.
Protection is implemented via integrated circuits: undervoltage lockout (2.2V threshold with 75mV hysteresis), cycle-by-cycle nMOS current limiting (2.6A peak), and thermal shutdown (+165°C with 20°C hysteresis). Soft-start limits inrush to 480mA, and True Shutdown™ blocks reverse current from LX_ to OUT_ using reversed pMOS body diode conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3.8% (3.175V–3.40V) at no load; maintains ≥3.00V under 1A load with 2.5V–3.15V input |
| Input Voltage Range | 2.5V–5.5V operating; starts up from 2.3V minimum; UVLO threshold 2.2V (75mV hysteresis) |
| Max Output Current | 1A peak; 0.9A continuous at VOUT = 3.3V, VIN > 2.5V, TA ≤ +85°C per typical circuit |
| Quiescent Current | 30µA in Track Mode (EN = low, TREN = high); 60µA in Automatic Track Mode; 45µA in Skip-mode boost |
| Switching Frequency | 3MHz nominal; auto-reduces to ~1.6MHz or ~1MHz when VIN > 83% of VOUT to maintain duty cycle control |
| Efficiency | >90% typical at 3.7V output, 150mA load, VIN = 3.1V; >85% at 5V output, 500mA, VIN = 3.6V |
| Thermal Protection | Thermal shutdown at TJ = +165°C (20°C hysteresis); θJA = 83°C/W on 4-layer board |
Pinout & Package
MAX8969EWL33+T uses a 1.25mm × 1.25mm, 9-bump Wafer-Level Package (WLP) with 0.4mm pitch, optimized for space-constrained mobile PCBs. The package integrates internal synchronous MOSFETs and requires no external diode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 / OUT2 | Power output node | Must be shorted together under IC; bypassed with 22µF ceramic capacitor placed adjacent to pins; cathode-connected internal diode to IN enables True Shutdown reverse-blocking |
| IN | Input supply | Accepts 2.5V–5.5V; bypassed with 4.7µF ceramic cap; UVLO triggers at 2.2V falling |
| LX1 / LX2 | Switching node | Connects to 1µH inductor; high-impedance in shutdown; shorted together under IC; internal silicon diodes to GND_/OUT_ conduct briefly during transitions |
| EN | Enable control | Logic-high forces boost mode regardless of TREN; logic-low enables TREN-controlled mode selection (Track or True Shutdown) |
| GND1 / GND2 | Ground reference | Must be shorted together under IC; connected to large ground plane for thermal dissipation and noise reduction |
| TREN | Track enable | Logic-high enables Track Mode (30µA IQ); grounded places device in True Shutdown (1µA IQ); overridden by EN = high |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Blocks reverse current from LX_ to OUT_ via reversed pMOS body diode; reduces shutdown current to 1µA typ |
| Automatic Track Mode (ATM) | Enters when VIN ≥ 95% of VOUT_TARGET (3.15V for 3.3V output); enables pMOS pass-through with 60µA IQ and automatic boost re-entry |
| Synchronous Rectification | Integrated nMOS/pMOS switches eliminate external diode; achieves >90% efficiency and eliminates forward-voltage loss |
| Light-load Skip Mode | Reduces switching frequency dynamically under light loads; maintains 45µA IQ and high efficiency without burst-mode noise |
| Robust Fault Protection | Combines UVLO, cycle-by-cycle 2.6A nMOS current limit, and +165°C thermal shutdown with 20°C hysteresis |
Applications
| Cell Phone Power Rail | Smartphone Display Backlight |
|---|---|
Use Scenario: Single-cell Li-ion battery (2.5V–4.2V) powers baseband processor requiring stable 3.3V I/O rail. IC Role / Device Role / Timing Role: Step-up converter maintaining regulated 3.3V output across full battery discharge curve, transitioning between ATM and boost as VIN drops below 3.15V. Use Value: Extends usable battery life by 12% vs. LDO solutions due to >90% efficiency at mid-discharge and 30µA Track Mode IQ during standby. | Use Scenario: OLED display backlight driver IC requires 3.3V bias supply with fast transient response to brightness changes. IC Role / Device Role / Timing Role: Primary 3.3V power source with <1µs ATM-to-boost transition enabling sub-10µs recovery from input droop during display frame updates. Use Value: Prevents visible flicker by sustaining output voltage within ±30mV during 50mA–500mA load steps, verified in MAX8969 toc16 waveform data. |
| eBook Reader Core Logic | GPS/PND RF Front-End Bias |
Use Scenario: E-ink controller SoC draws pulsed 3.3V current (10mA avg, 100mA peaks) from 3.7V nominal Li-ion cell. IC Role / Device Role / Timing Role: Low-noise 3.3V supply with 20mVpp ripple at 150mA; soft-start limits inrush to 480mA during cold boot. Use Value: Enables reliable cold-start at 2.5V battery voltage while maintaining <100mV output sag during 100ms 100mA pulses. | Use Scenario: GPS receiver module requires clean 3.3V supply with minimal conducted EMI near 1.575GHz antenna path. IC Role / Device Role / Timing Role: Compact 3.3V rail generator using 3MHz switching and small 1µH/22µF LC filter to suppress harmonics beyond 100MHz. Use Value: Meets EN 55022 Class B radiated emissions without shielding, validated by layout rules in datasheet page 15. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6109923DSER | Fixed 3.3V output; 1.2A max; 1.2MHz switching; 0.65µA shutdown IQ; no ATM mode; requires external compensation | Lacks automatic track functionality; lower IQ in shutdown but higher in light-load PWM mode (60µA vs. MAX8969EWL33+T's 45µA skip mode) | Prefer for ultra-low-power always-on sensors where ATM is unnecessary and board area allows larger inductor |
| RT9086AGQW | Adjustable output (0.6V–5.5V); 1A max; 2.5MHz switching; 25µA IQ in PFM mode; no True Shutdown or track mode | Requires external feedback resistors; no integrated reverse-current blocking; lacks UVLO hysteresis and thermal hysteresis specs | Prefer when output voltage flexibility is required and system-level reverse-current protection is already implemented |
Compared with TPS6109923DSER and RT9086AGQW, the MAX8969EWL33+T uniquely combines fixed 3.3V accuracy, True Shutdown™ reverse blocking, and Automatic Track Mode-enabling optimal battery life in handhelds where input voltage straddles the output setpoint.
Availability
MAX8969EWL33+T is available at Aetrix Electronics and suitable for cell phone power rails, smartphone display backlights, eBook reader core logic, GPS/PND RF front-end bias, and portable medical device monitoring circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX8969EWL33+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 consumer applications.
The MAX8969EWL33+T belongs to Maxim's ultra-compact, high-efficiency DC-DC converter product line, engineered specifically for space- and battery-life-constrained handheld devices operating from single-cell Li-ion batteries.
FAQ
What output voltage does the MAX8969EWL33+T deliver, and how accurate is it?
The MAX8969EWL33+T delivers a fixed 3.3V output with ±3.8% accuracy (3.175V–3.40V) at no load, and maintains ≥3.00V under 1A load when input voltage is between 2.5V and 3.15V. This accuracy is guaranteed over –40°C to +85°C and ensures reliable operation for 3.3V I/O rails in portable electronics without external feedback components.
How does the MAX8969EWL33+T achieve ultra-low quiescent current in battery-powered systems?
The MAX8969EWL33+T achieves ultra-low quiescent current through three distinct operating modes: 30µA in Track Mode (EN low, TREN high), 60µA in Automatic Track Mode (ATM), and 45µA in Skip-mode boost operation. In True Shutdown, current drops to 1µA typ. These modes are hardware-controlled via EN and TREN pins, eliminating software overhead and ensuring consistent low-IQ behavior across temperature and load.
Does the MAX8969EWL33+T include reverse-current protection, and how is it implemented?
Yes, the MAX8969EWL33+T implements True Shutdown™ to prevent reverse current flow from LX_ to OUT_. During shutdown, the internal p-channel MOSFET's body diode is reversed, blocking conduction. This feature is active in all non-boost modes (Track, ATM, True Shutdown) and is validated in Figure 3 of the datasheet, ensuring no battery drain when the system is powered off.
What protection features are integrated into the MAX8969EWL33+T, and how do they respond to faults?
The MAX8969EWL33+T integrates undervoltage lockout (2.2V threshold with 75mV hysteresis), cycle-by-cycle nMOS current limiting (2.6A peak), and thermal shutdown (+165°C with 20°C hysteresis). During overload, it regulates LX_ current to ≤2.6A; if output voltage sags below 72% of target (e.g., <2.376V for 3.3V), it enters shutdown and attempts auto-restart upon fault removal.
What external components are required for basic operation of the MAX8969EWL33+T?
The MAX8969EWL33+T requires only three external components for basic operation: a 1µH shielded inductor between LX_ and IN, a 4.7µF ceramic input capacitor (X5R/X7R) from IN to GND_, and a 22µF ceramic output capacitor (X5R/X7R) from OUT_ to GND_. All capacitors must be placed adjacent to their respective pins per layout guidelines on datasheet page 15.
MAX8969EWL33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 9-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 900mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLP (1.26x1.26)
MAX8969EWL33+T FAQ
1.How can I place an order for MAX8969EWL33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8969EWL33+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 MAX8969EWL33+T reliable?
The price and inventory of MAX8969EWL33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8969EWL33+T is usually 5 days.
3.What payment methods are accepted for MAX8969EWL33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8969EWL33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8969EWL33+T?
MAX8969EWL33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8969EWL33+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 MAX8969EWL33+T?
For technical support, including MAX8969EWL33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8969EWL33+T requirements.
6.How does Aetrix verify that MAX8969EWL33+T is sourced from the original manufacturer or authorized distributors?
All MAX8969EWL33+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 MAX8969EWL33+T meets industry standards.
7.What is the process for return or replacement of MAX8969EWL33+T?
All MAX8969EWL33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8969EWL33+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 MAX8969EWL33+T part is unused and in its original packaging.
Return procedure for MAX8969EWL33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX8969EWL33+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
