My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX77813EWP33+T
- Part No.:
- MAX77813EWP33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFBGA, WLBGA
- Datasheet:
-
MAX77813EWP33+T.pdf
- Description:
- IC REG BUCK BOOST PROG 2A 20WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,482
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX77813EWP33+T from Analog Devices is a synchronous buck-boost DC-DC converter optimized for single-cell Li+/Li-ion battery systems. It regulates output voltage from 2.6V to 5.14V across 2.3V–5.5V input, delivers up to 3A in buck mode and 2A in boost mode, operates at 2.5MHz switching frequency, and supports I²C-programmable voltage scaling-enabling dynamic power management in compact AR/VR headsets and mobile payment terminals.
For engineers reviewing the MAX77813EWP33+T datasheet, MAX77813EWP33+T pinout, MAX77813EWP33+T application, or MAX77813EWP33+T equivalent, key selection criteria include verified 20-bump WLP package compatibility, confirmed 3.4MHz high-speed I²C interface support, validated 97% peak efficiency at 100mA load, and documented thermal shutdown at +165°C with 20°C hysteresis.
Technical Context
The MAX77813EWP33+T implements a fixed-frequency (2.5MHz) current-mode PWM control scheme with H-bridge topology using a single inductor. Its three-phase switching sequence (Φ1–Φ3) enables seamless buck-to-boost transition without discontinuity, maintaining regulation during input voltage crossovers like 3.4V → 2.9V under 1.5A load.
It integrates dual current-limit selection (ILIM pin), soft-start with programmable ramp time (120µs/800µs), and burst-mode enhancement for transient loads exceeding ILIM_LX. Protection includes overvoltage (120% VOUT default), overcurrent, thermal shutdown (+165°C), and active discharge via 100Ω internal resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.30V to 5.5V - supports full discharge curve of single Li+/Li-ion cell (2.7V–4.2V nominal, down to 2.3V cutoff) |
| VOUT Range | 2.60V to 5.14V in 20mV steps - I²C-programmable for precise rail matching (e.g., 3.3V, 3.4V, 4.56V factory defaults) |
| Output Current | Up to 3A in buck mode, 2A in boost mode - determined by ILIM pin state and input/output voltage differential |
| Switching Frequency | 2.25MHz to 2.75MHz (typ 2.5MHz) - enables use of small 1µH inductor and minimizes EMI filtering requirements |
| Peak Efficiency | 97% - achieved at mid-load (e.g., 100mA @ 3.3V out, VIN = 3.8V), critical for battery runtime extension |
| Quiescent Current | 55µA (typ) in SKIP mode - ensures ultra-low standby power for always-on system rails |
| I²C Interface | 3.4MHz high-speed mode - allows rapid voltage scaling during processor DVFS transitions without interrupting operation |
Pinout & Package
The MAX77813EWP33+T is housed in a 20-bump wafer-level package (WLP), measuring 2.13mm × 1.83mm with 0.4mm pitch. This ultra-compact, bottom-terminal package enables high-density layout in space-constrained portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSYS | Battery/system supply input | Accepts 2.3V–5.5V raw battery voltage; requires 1µF ceramic bypass to AGND |
| IN | Primary power input node | Connected to VSYS through low-impedance path; bypassed with 10µF ceramic to PGND |
| OUT | Regulated output node | Delivers 2.6V–5.14V; requires 47µF ceramic capacitor to PGND for stability and ripple suppression |
| LX1 / LX2 | H-bridge switching nodes | Drive external 1µH inductor; each rated for 3.2A RMS continuous current; require tight loop layout to PGND |
| FB | Output voltage feedback | Senses regulated output via resistive divider; sets VOUT with ±1.0% accuracy in FPWM mode |
| POK | Open-drain power-good indicator | Asserts high-Z when VOUT ≥ 80% target; sinks current when VOUT < 75% or device disabled |
| EN | Active-high enable input | Internal 800kΩ pulldown ensures safe default-off state; VIH = 1.2V min at –40°C |
| ILIM | Inductor current limit selector | Pull high for 4.5A typ limit (supports 3A buck / 2A boost); pull low for 1.8A limit (650mA/800mA) |
| SCL / SDA | I²C serial interface | Support 3.4MHz HS mode; require 1.5kΩ–2.2kΩ pullups to VIO (1.7V–3.6V) |
| VIO | I²C logic supply | Independent 1.7V–3.6V rail; bypassed with 0.1µF ceramic to AGND |
| AGND / PGND | Analog & power ground | Must be connected on PCB; AGND ties to PGND at single point near IC to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Eliminates output voltage glitch during VIN crossover (e.g., 3.4V → 2.9V), preserving system uptime in battery-powered devices |
| Programmable output slew rate | Ramp-up at 20/40mV/µs and ramp-down at 5/10mV/µs - prevents inrush into downstream capacitive loads during DVFS |
| Dual ILIM current limit options | Selects between high-current (4.5A) and low-current (1.8A) modes via single GPIO, enabling hardware-configurable power delivery |
| SKIP mode with 55µA IQ | Maintains >85% efficiency below 10mA load - extends battery life in sleep/standby states without requiring firmware intervention |
| Integrated protection suite | Thermal shutdown (+165°C), OVP (120% VOUT default), soft-start (120µs), and hiccup-mode short-circuit response - reduces need for external fault management circuitry |
Applications
| AR/VR Headsets | Mobile Payment Terminals |
|---|---|
Use Scenario: Compact wearable headset requiring stable 3.3V/5V rails from a single 3.7V Li-ion cell across varying SoC and display loads. IC Role / Device Role / Timing Role: Primary system power regulator managing dynamic voltage scaling for application processor and display driver ICs. Use Value: Seamless buck-boost operation maintains uninterrupted power during battery discharge from 4.2V to 2.8V, avoiding brownouts during GPU-intensive rendering. | Use Scenario: Handheld EMV terminal with NFC, secure element, and touchscreen operating from a 3.8V Li-ion battery. IC Role / Device Role / Timing Role: Central power management IC delivering programmable 3.3V for MCU and 5V for contactless reader, with I²C coordination for low-power states. Use Value: 3.4MHz I²C interface enables real-time voltage adjustment during NFC polling bursts, minimizing voltage droop and ensuring card read reliability. |
| Security Cameras | Handheld Scanners |
Use Scenario: Battery-powered IP camera with night vision LEDs, image sensor, and Wi-Fi module drawing intermittent high peak current. IC Role / Device Role / Timing Role: High-efficiency buck-boost converter supplying 3.3V to SoC and 5V to IR LED array, with burst-mode response to flash events. Use Value: Burst-mode increases inductor current limit to 5.5A (ILIM=high) for <800µs, sustaining 5V rail during 1A LED pulse without output sag or dropout. | Use Scenario: Rugged industrial barcode scanner powered by removable Li-ion pack, requiring robust start-up and load transient immunity. IC Role / Device Role / Timing Role: Main DC-DC regulator powering CMOS imager, laser diode driver, and Bluetooth radio from 2.5V–4.4V battery range. Use Value: 2.5MHz switching frequency enables use of tiny 1µH inductor and 47µF output cap, meeting stringent size constraints while delivering 3A peak buck current for motorized scan actuation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63802DLAR | Fixed 3.3V/5.0V outputs (non-I²C); 2.5A max output; 2.4MHz switching; no POK or ILIM pin | Lacks dynamic voltage scaling and hardware current limit selection - suitable only for static-rail designs | Choose when I²C control and programmable current limits are unnecessary and board space permits larger 12-bump QFN |
| RTQ2132BWGE | 3.1MHz switching; 3A buck-boost; I²C interface; but no dedicated POK pin or ILIM pin - uses register-based current limit | Requires firmware initialization for all protections; lacks hardware-enforced startup safety via EN pulldown | Prefer when high-speed transient response is prioritized over hardware-fault autonomy and simple bring-up |
Compared with TPS63802DLAR and RTQ2132BWGE, the MAX77813EWP33+T uniquely combines hardware-configurable current limiting (ILIM pin), integrated power-good signaling (POK), and factory-default VOUT options - reducing firmware dependencies and simplifying qualification for portable medical and industrial devices.
Availability
MAX77813EWP33+T is available at Aetrix Electronics and suitable for AR/VR headsets, mobile payment terminals, and security cameras requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant packaging.
Supply support for MAX77813EWP33+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX77813EWP33+T belongs to Analog Devices' MAX® power management portfolio, designed specifically for space-constrained, battery-powered portable electronics demanding high efficiency, dynamic voltage control, and robust fault protection.
FAQ
What is the factory-default output voltage for MAX77813EWP33+T?
The MAX77813EWP33+T is ordered with "P33" suffix indicating a factory-programmed default output voltage of 3.3V. This value is stored in the VOUT[6:0] register at power-up and can be overwritten via I²C. The device maintains this setting until reset or power cycle, and supports fine-grained adjustment in 20mV increments across the full 2.6V–5.14V range.
Does MAX77813EWP33+T support both buck and boost operation simultaneously?
No - the MAX77813EWP33+T does not operate in true simultaneous buck-and-boost mode. Instead, it seamlessly transitions between buck (VIN > VOUT) and boost (VIN < VOUT) topologies using a single inductor and H-bridge architecture. During VIN ≈ VOUT (e.g., 3.4V input, 3.3V output), it dynamically selects optimal phase combinations (Φ1–Φ3) within each 2.5MHz clock cycle to maintain regulation without discontinuity or voltage glitch.
How does the ILIM pin affect maximum output current in MAX77813EWP33+T?
The ILIM pin on the MAX77813EWP33+T selects between two inductor current limit thresholds: pulling ILIM high configures 4.5A typical limit (supporting up to 3A in buck mode and 2A in boost mode), while pulling ILIM low sets 1.8A typical limit (supporting up to 800mA buck / 650mA boost). These settings directly determine achievable output current under given VIN/VOUT conditions and must be hardwired before power-up - floating ILIM is prohibited.
What is the purpose of the POK pin on MAX77813EWP33+T, and how is it used?
POK on the MAX77813EWP33+T is an open-drain power-good indicator that signals valid regulation: it goes high-impedance when VOUT reaches ≥80% of target, and pulls low when VOUT drops below 75% or the device is disabled. An external 10kΩ–100kΩ pullup resistor to VIO or VSYS is required. Polarity is configurable via I²C POK_POL bit, enabling direct connection to processor reset or PMIC sequencing logic without level-shifting.
Can MAX77813EWP33+T operate without I²C communication enabled?
Yes - the MAX77813EWP33+T operates fully autonomously without I²C. Factory-default VOUT (3.3V for MAX77813EWP33+T), switching frequency, and protection thresholds are active immediately after enable. I²C is optional for dynamic reconfiguration (e.g., voltage scaling during DVFS, reading fault status, or modifying OVP threshold). SDA/SCL pins may be tied to AGND if unused, and VIO can be connected to AGND to disable the interface entirely.
MAX77813EWP33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.6V
- Voltage - Output (Max):
- 5.14V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLP (1.83x2.13)
MAX77813EWP33+T FAQ
1.How can I place an order for MAX77813EWP33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77813EWP33+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 MAX77813EWP33+T reliable?
The price and inventory of MAX77813EWP33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77813EWP33+T is usually 5 days.
3.What payment methods are accepted for MAX77813EWP33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77813EWP33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77813EWP33+T?
MAX77813EWP33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77813EWP33+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 MAX77813EWP33+T?
For technical support, including MAX77813EWP33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77813EWP33+T requirements.
6.How does Aetrix verify that MAX77813EWP33+T is sourced from the original manufacturer or authorized distributors?
All MAX77813EWP33+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 MAX77813EWP33+T meets industry standards.
7.What is the process for return or replacement of MAX77813EWP33+T?
All MAX77813EWP33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77813EWP33+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 MAX77813EWP33+T part is unused and in its original packaging.
Return procedure for MAX77813EWP33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX77813EWP33+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…
