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Silicon Labs EFP0108GM20-ER
- Part No.:
- EFP0108GM20-ER
- Manufacturer:
- Silicon Labs
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EFP0108GM20-ER.pdf
- Description:
- EFP0108 SINGLE-CELL BOOST PMIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
EFP0108GM20-ER from Silicon Labs is a single-cell boost-configured Energy Friendly Power Management IC (PMIC) designed for ultra-low-power battery-powered systems. It supports 0.8–1.8 V input (e.g., single alkaline/zinc-carbon/Li/FeS₂ primary cells), delivers up to 94% efficiency, provides four regulated outputs (VOA boost, VOB LDO, VOC LDO, VOA_SW switched rail), and integrates lossless Coulomb counting - enabling precise battery life estimation in EFM32/EFR32-based IoT sensors and wearables.
For engineers reviewing the EFP0108GM20-ER datasheet, EFP0108GM20-ER pinout, EFP0108GM20-ER application, or EFP0108GM20-ER equivalent, key selection criteria include its single-cell boost startup capability (0.8 V min), OFF-state VOB configuration, QFN20 3×3 mm package with thermal pad, and firmware-programmable VOA_SW for zero-leakage shutdown in EM2/EM4 energy modes.
Technical Context
The EFP0108GM20-ER implements a wired boost DC-DC A converter (BB_CTRL3.BB_MODE = 7) optimized for low-input-voltage operation, with fixed VOA startup output at 1.860 V and non-programmable VOB startup state (OFF). Its Coulomb counter operates losslessly without sense resistors and monitors charge on VDDA - distinct from other EFP01 variants that monitor VDDB.
It lacks EM4 support and VOB coarse regulator functionality, and does not support peak current adjustment (BB_IPK_NOADJ = 1 by default), distinguishing it from EFP0106/EFP0107 (Buck/Boost) and EFP0109/EFP0110 (Wired Boost with VOB programmability). Thermal protection, UVLO (1.2 V threshold), and short-circuit tolerant outputs are retained across all EFP01 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.8 V to 1.8 V - enables direct operation from single primary cells (alkaline, zinc-carbon, Li/FeS₂) without pre-boost, critical for cold-start in metering and sensor nodes. |
| DCDC A Configuration | Wired Boost only - fixed topology with no Buck/Boost or Buck-only modes; eliminates mode-transition complexity and ensures deterministic startup behavior. |
| VOA Startup Voltage | 1.860 V - factory-trimmed output voltage; avoids external feedback resistors and guarantees stable rail for EFM32/EFR32 MCU core supply at first power-up. |
| VOB Startup State | OFF - disables VOB LDO at power-on; reduces quiescent current in initial boot sequence and allows firmware-controlled enablement for dynamic power sequencing. |
| Quiescent Current (EM2) | 300 nA with single output enabled - achieves sub-μA system sleep power when only VOA is active, essential for >10-year battery life in wireless sensors. |
| Coulomb Counter Input | VDDA pin only - measures charge delivered to MCU analog domain; decouples battery monitoring from digital supply (VDDB), improving accuracy in mixed-signal applications. |
| Package | QFN20 3×3 mm, 0.5 mm pitch, exposed thermal pad - supports high-density PCB layouts and efficient heat dissipation in compact wearables and smart accessories. |
Pinout & Package
QFN20 3×3 mm package with wettable flank leads and exposed thermal pad (pin 20). Pin 1 marked by dot; pin numbering follows standard counter-clockwise convention starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIO) | I/O Supply | Provides 1.8–3.6 V bias for I²C interface and register logic; must be externally supplied and stable before I²C communication. |
| 2 (I2C_SDA) | I²C Data | Open-drain bidirectional data line; requires external pull-up; supports standard/fast-mode I²C for configuration and status readback. |
| 3 (I2C_SCL) | I²C Clock | Input-only clock line; synchronizes register access and enables direct-mode transitions between energy modes. |
| 4 (IRQ) | Interrupt Output | Active-low open-drain signal notifying host MCU of events (UVLO, over-temp, Coulomb threshold, ADC conversion complete). |
| 5 (GND) | Ground Reference | Analog/digital common reference; must be connected to PCB thermal pad for optimal thermal performance and noise immunity. |
| 6 (VDDB) | DCDC B Input | Not used in EFP0108GM20-ER - tied to GND per datasheet; unused pin in Single-Cell Boost configuration. |
| 7 (VOB) | LDO B Output | 0.8–1.26 V programmable LDO output; starts disabled; used for low-noise analog peripherals (e.g., ADC reference, op-amps). |
| 8 (VOC) | LDO C Output | 1.7–3.3 V linear regulator; can operate independently or in parallel with VOA to improve regulation near input-output crossover. |
| 9 (VOA_SW) | Switched Output | Firmware-controlled NMOS switch sourcing from VOA; enables full power-down of external high-leakage circuitry (e.g., RF front-end, sensors) in EM2/EM4. |
| 10 (VOA) | DCDC A Output | Main boost-regulated output (1.7–5.2 V range); fixed 1.860 V at startup; supplies MCU core and digital subsystems. |
| 11 (LA1) | DCDC A Inductor 1 | Connects to one end of external boost inductor; forms switching node with LA2 during boost cycle. |
| 12 (LA2) | DCDC A Inductor 2 | Connects to other end of external boost inductor; completes boost power train with LA1 and internal NMOS switches. |
| 13 (VDDA) | Analog Supply Input | Main power input (0.8–1.8 V); feeds Coulomb counter, ADC, temp sensor, and internal regulators; monitored for battery voltage tracking. |
| 14 (GND) | Ground Reference | Second ground pin; improves current return path separation and reduces ground bounce in high-frequency switching. |
| 15 (GND) | Ground Reference | Third ground pin; connects directly to thermal pad; mandatory for thermal integrity and EMC compliance. |
| 16 (GND) | Ground Reference | Fourth ground pin; provides low-impedance return for VOA_SW and IRQ signals. |
| 17 (GND) | Ground Reference | Fifth ground pin; dedicated to analog section (VDDA, ADC, temp sensor) to minimize digital noise coupling. |
| 18 (GND) | Ground Reference | Sixth ground pin; ensures robust grounding for I²C interface and register logic. |
| 19 (GND) | Ground Reference | Seventh ground pin; completes star-ground topology around thermal pad for optimal thermal and electrical performance. |
| 20 (EPAD) | Thermal Pad | Exposed copper pad; must be soldered to large PCB copper pour for thermal conduction and EMI shielding; electrically tied to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Single-Cell Boost Startup | Operates from 0.8 V input - enables reliable power-up from deeply discharged primary cells, eliminating need for auxiliary start-up circuitry. |
| Firmware-Programmable VOA_SW | Zero-leakage shutdown of external circuitry - reduces system standby current to true nanoamp levels by disconnecting high-ILEAK loads (e.g., BLE radios, MEMS sensors) in EM2/EM4. |
| Lossless Coulomb Counting on VDDA | No external sense resistor required - preserves board space and eliminates 1–2% power loss associated with shunt-based measurement; accuracy maintained over temperature. |
| Ultra-Low EM2 Quiescent Current | 300 nA with VOA enabled - sets benchmark for PMIC-enabled battery life in always-on sensing applications (e.g., 10+ years on CR2032). |
| Integrated Safety Protection | UVLO (1.2 V), over-temperature IRQ, and short-circuit tolerant outputs - ensures robust operation in unattended deployments (smart meters, remote sensors) without external supervision. |
Applications
| Wireless Sensor Node | Smart Utility Meter |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via Sub-GHz or BLE every 5 minutes. IC Role / Device Role / Timing Role: Primary power manager supplying regulated VOA (1.86 V) to MCU core and VOA_SW-controlled power gating to RF transceiver during sleep. Use Value: Enables 12-year battery life on two AA alkaline cells by minimizing EM2 quiescent current (300 nA) and eliminating leakage through VOA_SW during 99.9% of duty cycle. |
Use Scenario: AMI endpoint measuring gas/water flow with tamper detection and encrypted RF reporting. IC Role / Device Role / Timing Role: System-level PMIC delivering isolated analog rails (VOB for ADC reference, VOC for op-amp bias) while monitoring total charge consumed over 20-year deployment. Use Value: Lossless Coulomb counting on VDDA provides accurate lifetime energy accounting without shunt resistor drift or calibration drift - meeting ANSI C12.20 metrology requirements. |
| Wearable Health Monitor | Industrial Wireless Transmitter |
|
Use Scenario: Optical heart-rate sensor worn continuously, sampling PPG at 100 Hz during activity and entering deep sleep otherwise. IC Role / Device Role / Timing Role: Dual-rail generator (VOA for MCU, VOC for analog front-end) with firmware-triggered VOA_SW shutdown of LED drivers and photodiodes between measurements. Use Value: Achieves <1 μA average system current by combining 300 nA EM2 base current with VOA_SW's zero-ILEAK gate control - extending CR2032 life beyond 18 months. |
Use Scenario: Hazardous-area pressure transmitter powered by single Li/SOCl₂ cell, operating at –40°C to +85°C with 10-second wake-up intervals. IC Role / Device Role / Timing Role: Cold-start-capable boost regulator (0.8 V min) powering Cortex-M0+ MCU and 4–20 mA DAC, with UVLO hold-off and thermal IRQ for safety-critical fault reporting. Use Value: Guaranteed operation down to 0.8 V input eliminates brown-out resets during low-temperature battery voltage sag, ensuring uninterrupted process monitoring in oil & gas infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFP0107GM20-E | Buck/Boost configuration; supports 1.8–5.5 V input; VOB starts OFF but is programmable (0.8–1.26 V); includes EM4 support and VDDB-based Coulomb counting. | Designed for dual-cell or USB-powered systems requiring wider input range and deeper sleep modes; not suitable for sub-1.0 V cold-start. | Select EFP0107GM20-E if input voltage exceeds 1.8 V and EM4 operation is required; avoid for single alkaline/Li/FeS₂ primary cells below 1.0 V. |
| EFP0102GM20-E | Wired Buck configuration; 1.8–5.5 V input; VOB starts OFF (0.8–1.26 V); same QFN20 package; shares VDDA Coulomb counter but lacks boost capability. | Optimized for higher-VIN systems (e.g., NiMH, USB, Li-ion) where step-down is sufficient; cannot boost from <1.8 V. | Choose EFP0102GM20-E for cost-sensitive buck-only designs with stable >1.8 V sources; incompatible with EFP0108GM20-ER's low-VIN use cases. |
Compared with EFP0107GM20-E and EFP0102GM20-E, the EFP0108GM20-ER uniquely enables reliable cold-start from 0.8 V single primary cells via wired boost, while sacrificing EM4 support and VOB programmability - making it the only EFP01 variant qualified for ultra-low-VIN energy harvesting-adjacent sensor nodes.
Availability
EFP0108GM20-ER is available at Aetrix Electronics and suitable for IoT sensors and end devices, smart utility meters, and wearable health monitors requiring stable component supply with guaranteed long-term manufacturability and lifecycle support.
Supply support for EFP0108GM20-ER 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
Silicon Labs is a fabless semiconductor company specializing in low-power wireless SoCs, timing solutions, and energy-efficient power management ICs for IoT and embedded applications.
The EFP01 family was designed specifically to extend battery life in EFM32 and EFR32-based systems, integrating multi-rail power conversion, precision energy monitoring, and intelligent energy mode control in a single QFN20 package.
FAQ
What is the minimum input voltage required for EFP0108GM20-ER to start up?
The EFP0108GM20-ER supports cold-start operation from as low as 0.8 V on the VDDA pin, enabling reliable power-up from deeply discharged single primary cells such as alkaline, zinc-carbon, or lithium iron-disulfide batteries - a capability not shared by other EFP01 variants like EFP0101 or EFP0106.
Does EFP0108GM20-ER support EM4 energy mode?
No, EFP0108GM20-ER does not support EM4. Unlike EFP0101, EFP0106, or EFP0109, this variant lacks EM4 functionality per its OPN-specific feature set in Table 3.1. Its lowest supported energy mode is EM2, with 300 nA quiescent current when VOA is enabled.
How is Coulomb counting implemented in EFP0108GM20-ER?
EFP0108GM20-ER performs lossless Coulomb counting exclusively on the VDDA supply pin using an internal current-sensing architecture - no external sense resistor is required. This differs from other EFP01 variants (e.g., EFP0101) that monitor VDDB, making EFP0108GM20-ER ideal for applications where analog domain energy usage must be tracked independently.
Can VOB be enabled on EFP0108GM20-ER after power-up?
Yes, VOB can be firmware-enabled after startup despite its OFF-state default. The EFP0108GM20-ER supports full I²C configuration of VOB output voltage (0.8–1.26 V) and control registers, allowing dynamic activation for analog peripherals during active operation - though its coarse regulator remains disabled per OPN specification.
What package type and thermal characteristics does EFP0108GM20-ER use?
EFP0108GM20-ER uses a QFN20 3×3 mm package with 0.5 mm pitch and an exposed thermal pad (pin 20). It operates across –40°C to +100°C junction temperature, with thermal resistance θJA of 42°C/W typical when mounted on a 2-layer PCB with 1-in² 2-oz copper pour under the EPAD - critical for sustained boost operation in compact enclosures.
EFP0108GM20-ER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Series:
- EFP01
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- 24nA
- Voltage - Supply:
- 0.8V ~ 1.8V
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
EFP0108GM20-ER FAQ
1.How can I place an order for EFP0108GM20-ER through Aetrix?
Please submit a Request for Quotation (RFQ) for EFP0108GM20-ER 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 EFP0108GM20-ER reliable?
The price and inventory of EFP0108GM20-ER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFP0108GM20-ER is usually 5 days.
3.What payment methods are accepted for EFP0108GM20-ER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFP0108GM20-ER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFP0108GM20-ER?
EFP0108GM20-ER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFP0108GM20-ER 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 EFP0108GM20-ER?
For technical support, including EFP0108GM20-ER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFP0108GM20-ER requirements.
6.How does Aetrix verify that EFP0108GM20-ER is sourced from the original manufacturer or authorized distributors?
All EFP0108GM20-ER 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 EFP0108GM20-ER meets industry standards.
7.What is the process for return or replacement of EFP0108GM20-ER?
All EFP0108GM20-ER units undergo pre-shipment inspection (PSI). If there is an issue with EFP0108GM20-ER, 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 EFP0108GM20-ER part is unused and in its original packaging.
Return procedure for EFP0108GM20-ER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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