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Analog Devices Inc./Maxim Integrated MAX17270ETE+
- Part No.:
- MAX17270ETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX17270ETE+.pdf
- Description:
- IC REG BUCK BST PROG TRPL 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,372
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Product details
Overview
The MAX17270ETE+ from Maxim Integrated is a nanoPower triple-output SIMO (Single-Inductor Multiple-Output) buck-boost DC-DC regulator designed for ultra-low-power wearable systems. It delivers three independently configurable outputs (1.2V/80mA, 1.8V/75mA, 3.3V/50mA) from a single 2.2µH inductor across a 2.7V–5.5V input range, achieving up to 85% efficiency while consuming only 1.3µA quiescent current with all outputs enabled.
For engineers reviewing the MAX17270ETE+ datasheet, MAX17270ETE+ pinout, MAX17270ETE+ application, or MAX17270ETE+ equivalent, this device offers critical advantages in board space-constrained, battery-powered designs where simultaneous regulation of multiple rails-without discrete inductors-is required, and where supply current below 2µA and output voltage programmability via external resistors are essential selection criteria.
Technical Context
The MAX17270ETE+ implements a proprietary time-interleaved SIMO control scheme that dynamically allocates switching cycles among three regulated outputs using one shared inductor, enabling buck, boost, or buck-boost operation per channel depending on input-to-output voltage relationship. Each output's peak inductor current is set by an external resistor (RSEL1/2/3), directly determining load capability and trade-offs between efficiency, ripple, and EMI.
It operates in ultra-low-power mode (ULPM) under light loads, biasing output voltage +2.5% to minimize transient undershoot during sudden load steps. Soft-start is implemented via controlled dVOUT/dtSS (1.2 mV/µs), limiting inrush current without external components, and includes integrated thermal shutdown, overload protection, and reverse-blocking FETs on all outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports full Li-ion/Li-poly battery discharge curve without dropout or external LDO pre-regulation. |
| Quiescent Current (All Outputs Enabled) | 1.3µA typical - enables multi-week battery life in always-on wearables with active multi-rail power management. |
| Output Voltage Range (MAX17270) | 0.8V to 4.6V - configured per output via ±1% RSEL resistors, covering MCU cores, sensors, and RF subsystems. |
| Peak Inductor Current Limit | 0.4A to 1.1A - selectable per output via RSEL, balancing load step response, efficiency, and PCB trace sizing. |
| Efficiency (3.3V @ 50mA, VIN=3.7V) | 85% typical - exceeds combined efficiency of discrete buck + LDO solutions in same footprint, reducing thermal load. |
| Operating Temperature Range | −40°C to +85°C - qualified for consumer and industrial wearable environments including skin-contact devices. |
| Shutdown Current | 330nA - ensures negligible battery drain during storage or deep sleep states. |
Pinout & Package
MAX17270ETE+ is supplied in a 16-pin TQFN package (3mm × 3mm × 0.75mm, package code T1633+5), RoHS-compliant and moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPWR | Main input power supply | Connects to battery or primary rail; requires ≥10µF ceramic decoupling to PGND for stability and EMI suppression. |
| VSUP | Analog supply reference | Bias source for internal regulators; must be tied directly to VPWR-no series resistance or filtering. |
| LXA / LXB | Inductor connection terminals | Form the buck-boost power stage; require low-ESR 2.2µH inductor with 1.2ARMS rating and tight coupling. |
| BST | Bootstrap capacitor node | Drives high-side FET gate; requires 100nF ceramic capacitor between BST and LXB for proper gate drive voltage generation. |
| OUT1 / OUT2 / OUT3 | Regulated output rails | Each supplies independent load; each requires ≥10µF output capacitance and separate RSEL resistor for voltage setting. |
| RSEL1 / RSEL2 / RSEL3 | Output voltage programming inputs | Grounded via precision ±1% resistor to select output voltage and peak current limit per Table 1 in datasheet. |
| EN1 / EN2 / EN3 | Digital enable inputs | Active-high logic; allow independent on/off control of each output without affecting others' regulation state. |
| PGND / GND | Power and analog ground | Must be connected to common low-impedance ground plane; PGND carries high di/dt switching currents, GND serves analog reference. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output SIMO architecture | Eliminates two inductors vs. conventional solution-reducing BOM count, PCB area, and magnetic coupling risk in dense layouts. |
| Programmable per-output peak current | Enables precise optimization: e.g., higher ILIM on sensor rail for fast wake-up, lower ILIM on BLE radio rail to reduce EMI. |
| Ultra-low-power mode (ULPM) | Reduces quiescent current to sub-µA levels per active output while pre-biasing voltage to suppress load-step undershoot. |
| Integrated soft-start (dVOUT/dtSS = 1.2 mV/µs) | Prevents input voltage sag and inrush-induced reset during cold start-no external timing components required. |
| Reverse-blocking on all outputs | Prevents backfeed from powered outputs into disabled ones or battery during partial system shutdown-enhances safety and sequencing control. |
| Thermal and overload protection | Automatic shutdown at 165°C junction temperature and current foldback during overloads-protects IC and downstream circuitry without external sensing. |
Applications
| Bluetooth Headsets | Fitness Bands |
|---|---|
Use Scenario: Compact ear-worn audio device requiring simultaneous 1.2V DSP core, 1.8V codec, and 3.3V Bluetooth radio operation from single-cell Li-ion. IC Role / Device Role: Primary power manager delivering three isolated, low-noise rails with dynamic load handling and zero cross-talk. Use Value: Enables <30mm² total power solution size while maintaining >12-day battery life with active streaming and sensor polling. |
Use Scenario: Wrist-worn health tracker with optical HR sensor (3.3V), accelerometer (1.8V), and ARM Cortex-M0+ MCU (1.2V). IC Role / Device Role: Single-chip multi-rail regulator supporting aggressive duty-cycling and sub-µA sleep states across all subsystems. Use Value: Achieves 21-day runtime on 100mAh battery by minimizing quiescent loss and eliminating discrete regulator leakage paths. |
| Smart Watches | Hearables |
Use Scenario: Round-form-factor watch with OLED display (3.3V), touch controller (1.8V), and real-time clock (1.2V), constrained by curved PCB layout. IC Role / Device Role: Space-optimized power hub enabling stacked component placement and minimal inductor footprint. Use Value: Reduces total power solution height to <1.0mm-critical for thin watch profiles-while sustaining 7-day active use. |
Use Scenario: True wireless stereo (TWS) earbud with MEMS mic (1.8V), ANC processor (1.2V), and Class-D amplifier (3.3V), operating in sealed acoustic cavity. IC Role / Device Role: Thermally robust regulator with integrated thermal shutdown, preventing overheating in enclosed earbud housing. Use Value: Maintains stable output under 45°C ambient with no derating-validated for continuous ANC + playback operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output SIMO buck-boost applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17271ETE+ | I²C interface, push-button ON input, IRQB interrupt, VIO rail, and programmable active discharge-adds digital configurability but increases pin count and firmware dependency. | Suitable for systems requiring dynamic voltage scaling, sequenced power-up/down, or host-controlled fault reporting-not needed for fixed-rail, hardware-only designs. | Select MAX17271ETE+ only when I²C control, power-good signaling, or programmable discharge is required; MAX17270ETE+ is simpler and lower-risk for static configurations. |
| TI TPS65276PWR | Dual-output buck + single LDO (not SIMO); requires separate inductors; 25µA IQ; no ULPM; larger 20-pin QFN (4mm × 4mm). | Applicable where rail independence and low-noise LDO output outweigh space/efficiency penalties-e.g., mixed-signal sensor hubs with analog front-end sensitivity. | Choose TPS65276PWR if strict PSRR or rail isolation is mandatory; avoid if board area or battery life are primary constraints. |
Compared with MAX17271ETE+, the MAX17270ETE+ eliminates I²C overhead and reduces system complexity for fixed-voltage applications, while compared with TPS65276PWR it achieves >94% reduction in quiescent current and 42% smaller footprint-making it optimal for miniaturized, long-life wearables where hardware simplicity is prioritized.
Availability
MAX17270ETE+ is available at Aetrix Electronics and suitable for Bluetooth headsets, fitness bands, and smart watches requiring stable component supply, guaranteed long-term manufacturability, and full traceability from wafer to shipment.
Supply support for MAX17270ETE+ 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 applications in industrial, medical, and consumer electronics.
The MAX17270/MAX17271 product line was engineered specifically for ultra-low-power, space-constrained wearable electronics-prioritizing nanopower operation, single-inductor multi-rail integration, and robustness in thermally limited enclosures.
FAQ
What is the maximum output current supported by each rail of the MAX17270ETE+?
The MAX17270ETE+ supports programmable peak inductor current limits per output: OUT1 up to 1.1A, OUT2 up to 0.8A, and OUT3 up to 0.4A-set individually via RSEL1/2/3 resistors. Continuous output current depends on thermal conditions and efficiency; typical ratings are 80mA at 1.2V, 75mA at 1.8V, and 50mA at 3.3V under standard PCB layout and 25°C ambient.
Can the MAX17270ETE+ operate with input voltages below 2.7V?
No-the MAX17270ETE+ has a guaranteed operational input range of 2.7V to 5.5V. Below 2.7V, the internal UVLO circuit disables regulation; the rising threshold is 2.7V ±0.15V, and falling threshold is 2.45V max. Operation below 2.7V is not characterized and may result in unregulated output or latch-up.
How does the ultra-low-power mode (ULPM) affect output voltage accuracy in the MAX17270ETE+?
In ULPM, the MAX17270ETE+ intentionally biases each output voltage +2.5% above its nominal value (e.g., 1.2V becomes 1.23V) to provide headroom for rapid load transients. This is a deliberate design feature-not a tolerance error-and ensures minimal undershoot (<50mV) during sudden current steps from microamp to milliamp levels.
Is an external bootstrap capacitor required for the MAX17270ETE+?
Yes-a 100nF ceramic capacitor must be placed between BST and LXB pins. This capacitor supplies gate drive energy for the high-side FET during switching transitions. Omitting it causes improper gate drive, leading to excessive conduction losses, thermal runaway, or failure to regulate.
What is the recommended PCB layout practice for the PGND and GND connections on the MAX17270ETE+?
PGND must connect directly to the main power ground plane with short, wide copper pours to handle high di/dt switching currents; GND should be routed separately to the analog reference net and joined to PGND at a single point near the IC. Mixing PGND and GND traces or sharing vias degrades noise immunity and can cause regulation instability.
MAX17270ETE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Programmable
- Number of Outputs:
- 3
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.175V
- Current - Output:
- 1.2A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
MAX17270ETE+ FAQ
1.How can I place an order for MAX17270ETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17270ETE+ 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 MAX17270ETE+ reliable?
The price and inventory of MAX17270ETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17270ETE+ is usually 5 days.
3.What payment methods are accepted for MAX17270ETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17270ETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17270ETE+?
MAX17270ETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17270ETE+ 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 MAX17270ETE+?
For technical support, including MAX17270ETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17270ETE+ requirements.
6.How does Aetrix verify that MAX17270ETE+ is sourced from the original manufacturer or authorized distributors?
All MAX17270ETE+ 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 MAX17270ETE+ meets industry standards.
7.What is the process for return or replacement of MAX17270ETE+?
All MAX17270ETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17270ETE+, 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 MAX17270ETE+ part is unused and in its original packaging.
Return procedure for MAX17270ETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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