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Silicon Labs EFP0109GM20-E
- Part No.:
- EFP0109GM20-E
- Manufacturer:
- Silicon Labs
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EFP0109GM20-E.pdf
- Description:
- EFP0109 WIRED BOOST PMIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
EFP0109GM20-E from Silicon Labs is a highly efficient, firmware-configurable Power Management IC (PMIC) optimized for ultra-low-power battery-powered systems. It delivers three regulated outputs - one wired-boost DC-DC converter (VOA), one buck-only DC-DC + LDO (VOB), and one linear regulator (VOC) - with Coulomb counting, I²C control, and IRQ signaling. Designed for EFM32/EFR32 microcontrollers, it supports 1.8 V–3.6 V input from single Li/MnO₂ or dual alkaline/LiFeS₂ primary cells in IoT sensors and wearable health devices.
For engineers reviewing the EFP0109GM20-E datasheet, EFP0109GM20-E pinout, EFP0109GM20-E application, or EFP0109GM20-E equivalent, key selection criteria include its wired-boost DC-DC configuration (not buck/boost), 3.327 V VOA startup voltage, 0.8–3.3 V programmable VOB range, EM4 support, and QFN20 3×3 mm package with thermal pad - all critical for energy-constrained edge-node designs.
Technical Context
The EFP0109GM20-E implements a fixed-wired boost topology for its primary DC-DC A output (VOA), configured at startup to 3.327 V and programmable via the VOA_V register (1.7374 V + VOA_V × 0.0306 V). Unlike buck/boost variants, it lacks autonomous mode transition logic and does not support NTM or buck operation - its BB_CTRL3.BB_MODE is permanently set to 7 (Wired Boost).
It integrates a dedicated buck-only DC-DC B (VOB) with parallel LDO for improved light-load efficiency, plus an independent VOC LDO (1.7–3.3 V). Coulomb counting is lossless and shared across VOA/VOB paths, while safety features include short-circuit tolerant outputs, UVLO (<1.2 V VDDB), and over-temperature IRQ assertion - all operating across –40 °C to +100 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 3.6 V - supports single Li/MnO₂ (1.8–3.2 V) or dual alkaline/LiFeS₂ (1.6–3.6 V) primary cells without external regulation. |
| VOA Output Mode | Wired Boost only - no buck or buck/boost capability; fixed startup voltage 3.327 V, programmable 1.7–5.2 V via VOA_V register. |
| VOB Output Range | 0.8 V to 3.3 V at startup - configurable via VOB_EM0_V/VOB_EM2_V registers; supports low-voltage MCU cores and peripherals. |
| Quiescent Current (EM2) | 300 nA with single output enabled - enables multi-year battery life in always-on sensor nodes with periodic wake-up intervals. |
| Efficiency | Up to 94% - achieved under typical load conditions with optimized inductor selection and minimal PCB parasitics. |
| Package | QFN20 3×3 mm, 0.5 mm pitch, exposed thermal pad - enables compact layout and efficient heat dissipation in space-constrained wearables. |
| Operating Temperature | –40 °C to +100 °C junction - validated for industrial-grade reliability in uncontrolled ambient environments. |
Pinout & Package
Package: QFN20 (3 mm × 3 mm, 0.5 mm pitch), thermally enhanced with exposed center pad (GND-connected). Compliant with JEDEC MO-220, MS-013 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | Provides power to ADC, Coulomb counter, and internal reference; must be decoupled with 100 nF ceramic capacitor near pin. |
| VDDB | Main power input | Primary input for DC-DC A/B and LDOs; accepts 1.8–3.6 V; requires bulk capacitance (≥4.7 µF) and local 100 nF ceramic. |
| VOA | Boost DC-DC output | Regulated output (1.7–5.2 V); connects to EFM32/EFR32 VDD; requires external inductor (1.0–2.2 µH) and output capacitor (10–22 µF). |
| VOA_SW | Firmware-controlled switch | Enables complete power-down of high-leakage external circuitry (e.g., RF front-end, sensors) during EM2/EM4 sleep modes. |
| VOB | Buck + LDO output | Secondary regulated rail (0.8–3.3 V); combines DC-DC B efficiency with LDO B low-noise performance for sensitive analog blocks. |
| VOC | Linear regulator output | Third independent supply (1.7–3.3 V); can operate standalone or in parallel with VOA for improved transient response and ripple suppression. |
| I2C_SDA / I2C_SCL | I²C bidirectional interface | Configurable I²C bus (up to 400 kHz) for real-time register access, dynamic voltage scaling, and energy mode transitions. |
| IRQ | Interrupt request output | Open-drain signal asserted on UVLO, over-temperature, Coulomb counter threshold, or ADC conversion completion. |
| GND | Ground reference | All ground pins (including thermal pad) must be connected to a low-impedance solid plane; thermal pad soldered for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Lossless Coulomb counting | Zero-sense-resistor charge measurement across VOA/VOB paths - eliminates board area, BOM cost, and insertion loss of shunt resistors. |
| Firmware-programmable VOA_SW | Enables full system-level power gating of external peripherals during deep sleep - reduces system standby current to sub-µA levels. |
| EM4 support with coarse regulators | Retains basic regulation (VOA/VOB/VOC coarse rails) in EM4 with ~100 µA max load and ultra-low quiescent current - preserves state without full wake-up. |
| Short-circuit tolerant outputs | All regulated outputs survive sustained short-to-ground events without latch-up or damage - eliminates need for external fuses or current-limiting circuits. |
| Programmable inrush current | BB_IRI_CON register limits peak input current during startup - prevents brown-out on weak batteries or high-impedance sources like coin cells. |
Applications
| Smart Metering Sensors | Industrial Wireless Node |
|---|---|
Use Scenario: Battery-powered ultrasonic flow meter with 10-year lifetime requirement, operating in unheated outdoor enclosures. IC Role / Device Role / Timing Role: Primary PMIC supplying regulated 3.3 V (VOA) to MCU and 1.8 V (VOB) to analog front-end, with Coulomb counting for battery health monitoring. Use Value: 300 nA EM2 quiescent current and –40 °C to +100 °C operation ensure reliable long-term deployment without maintenance cycles. |
Use Scenario: Self-powered vibration sensor node on rotating machinery, harvesting energy intermittently but requiring deterministic low-power sleep/wake behavior. IC Role / Device Role / Timing Role: System power arbiter managing energy storage (capacitor), MCU supply (VOA), and analog sensor bias (VOB), triggered by IRQ-driven wake events. Use Value: Wired-boost topology delivers stable 3.3 V from decaying 2.0–3.4 V input; VOA_SW isolates leakage paths during 99.9% duty-cycle sleep. |
| Wearable Health Monitor | Home Security Sensor |
Use Scenario: Disposable ECG patch with single Li/MnO₂ cell, requiring clinical-grade signal integrity and >24-month shelf life. IC Role / Device Role / Timing Role: Power source for EFM32HG MCU, analog front-end, and BLE radio; VOC supplies low-noise 2.5 V to ADC reference. Use Value: Lossless Coulomb counting tracks battery depletion without calibration drift; 94% efficiency extends usable runtime per charge cycle. |
Use Scenario: Door/window contact sensor using dual alkaline cells, transmitting status every 5 minutes via sub-GHz RF link. IC Role / Device Role / Timing Role: Central power controller enabling EM4 retention, fast EM0 wake via IRQ, and precise VOB voltage setting for RF transceiver bias. Use Value: Programmable VOB startup voltage (1.858 V) matches RF IC's optimal supply point; EM4 coarse regulators maintain RTC and memory without full re-initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX77650 | Single-input, single-output buck-boost PMIC with integrated charger; no Coulomb counter; 2.5–4.4 V input; 0.6–3.7 V output. | Lacks multi-rail flexibility and battery chemistry support for primary cells below 2.5 V; targets Li-ion rechargeables only. | Select when designing for USB-charged Li-ion systems requiring integrated charging, not primary-cell longevity or Coulomb tracking. |
| TPS65270 | Dual-buck + LDO PMIC; 2.95–6.5 V input; no boost capability; no Coulomb counter; no EM4 support; larger HTSSOP-24 package. | Designed for higher-voltage industrial rails; cannot regulate from 1.8 V input or support primary-cell chemistries directly. | Choose for fixed 3.3/1.8 V dual-rail systems powered from 5 V or 12 V sources where ultra-low quiescent current is secondary. |
Compared with MAX77650 and TPS65270, the EFP0109GM20-E uniquely combines wired-boost operation from 1.8 V input, lossless Coulomb counting, EM4 retention, and QFN20 footprint - making it the only option for long-life, multi-chemistry, sensor-class PMIC applications requiring firmware-controlled power sequencing and battery health analytics.
Availability
EFP0109GM20-E is available at Aetrix Electronics and suitable for IoT sensors, smart metering, and wearable health devices requiring stable component supply, long-lifecycle support, and guaranteed traceability for medical and industrial certifications.
Supply support for EFP0109GM20-E 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 ultra-low-power sensor nodes and edge devices - delivering multi-output regulation, precision Coulomb counting, and firmware-configurable energy modes for EFM32/EFR32-based systems.
FAQ
What is the default VOA output voltage at startup for EFP0109GM20-E?
The EFP0109GM20-E starts up with VOA configured to 3.327 V, as specified in Table 3.1 (OPN-Specific Features) of the datasheet. This value is factory-programmed into OTP and can be modified post-startup via the VOA_V register (1.7374 V + VOA_V × 0.0306 V), but the initial boot voltage is fixed and non-volatile.
Does EFP0109GM20-E support buck/boost or only wired boost operation?
EFP0109GM20-E supports wired boost only - its BB_CTRL3.BB_MODE is hardwired to 7, disabling autonomous buck/boost transitions and NTM mode. Unlike EFP0106/EFP0107, it cannot operate in buck or buck/boost configurations; it is strictly a boost converter from 1.8 V–3.6 V input to programmable 1.7–5.2 V output.
Can EFP0109GM20-E be used with lithium thionyl chloride (Li/SOCl₂) primary cells?
No - EFP0109GM20-E has a maximum input voltage of 3.6 V and is rated for 1.8 V–3.6 V operation, while Li/SOCl₂ cells deliver 3.0–3.65 V. Though the upper limit overlaps, the datasheet explicitly lists supported chemistries (single Li/MnO₂, dual alkaline/LiFeS₂) and excludes Li/SOCl₂. Use EFP0106GM20-E or EFP0107GM20-E for buck/boost compatibility with wider input ranges.
What is the function of the VOA_SW pin on EFP0109GM20-E?
The VOA_SW pin on EFP0109GM20-E is a firmware-controlled switch that disconnects the VOA output rail from external high-leakage circuitry (e.g., RF modules, op-amp bias networks) during EM2/EM4 sleep modes. It reduces system standby current by eliminating off-state leakage paths without requiring external MOSFETs or power switches.
Is Coulomb counting on EFP0109GM20-E compatible with both VOA and VOB outputs?
Yes - the EFP0109GM20-E implements a single, shared lossless Coulomb counter that measures total charge delivered through both VOA and VOB paths. The counter accumulates charge across both outputs simultaneously; there is no separate channel or register for VOB-only or VOA-only measurement - total integrated charge reflects combined system load.
EFP0109GM20-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Series:
- EFP01
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- 24nA
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
EFP0109GM20-E FAQ
1.How can I place an order for EFP0109GM20-E through Aetrix?
Please submit a Request for Quotation (RFQ) for EFP0109GM20-E 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 EFP0109GM20-E reliable?
The price and inventory of EFP0109GM20-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFP0109GM20-E is usually 5 days.
3.What payment methods are accepted for EFP0109GM20-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFP0109GM20-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFP0109GM20-E?
EFP0109GM20-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFP0109GM20-E 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 EFP0109GM20-E?
For technical support, including EFP0109GM20-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFP0109GM20-E requirements.
6.How does Aetrix verify that EFP0109GM20-E is sourced from the original manufacturer or authorized distributors?
All EFP0109GM20-E 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 EFP0109GM20-E meets industry standards.
7.What is the process for return or replacement of EFP0109GM20-E?
All EFP0109GM20-E units undergo pre-shipment inspection (PSI). If there is an issue with EFP0109GM20-E, 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 EFP0109GM20-E part is unused and in its original packaging.
Return procedure for EFP0109GM20-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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