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Silicon Labs EFP0104GM20-D
- Part No.:
- EFP0104GM20-D
- Manufacturer:
- Silicon Labs
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EFP0104GM20-D.pdf
- Description:
- EFP0104 WIRED BUCK PMIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,046
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Product details
Overview
EFP0104GM20-D from Silicon Labs is a highly integrated, ultra-low-power Energy Friendly Power Management IC (PMIC) designed for battery-powered EFM32/EFR32 microcontroller systems. It delivers four regulated outputs - one buck/boost DC-DC (VOA), one buck-only DC-DC with parallel LDO (VOB), one standalone LDO (VOC), and one firmware-controlled switched output (VOA_SW) - with input voltage support from 1.8 V to 5.5 V, EM2 quiescent current of 300 nA (single output enabled), and up to 94% peak efficiency.
For engineers reviewing the EFP0104GM20-D datasheet, EFP0104GM20-D pinout, EFP0104GM20-D application, or EFP0104GM20-D equivalent, this page provides verified technical context, validated pin functions, confirmed battery-type compatibility (including dual alkaline/LiFeS₂ and NiMH), exact OPN-specific configuration (Wired Buck with LDO C, VOB disabled at startup), and real-world design implications for IoT sensor nodes and low-energy metering systems.
Technical Context
The EFP0104GM20-D implements a Wired Buck with LDO C configuration: DCDC A operates in fixed wired-buck mode (BB_CTRL3.BB_MODE = 5), while VOB is disabled at startup and programmable only within 0.8 V–1.26 V range. Its VOC LDO is paired with VOA and not independently configurable.
It supports lossless Coulomb counting on VDDB, full I²C configurability including Direct Mode for fast energy-mode transitions, IRQ signaling, and safety features including UVLO (1.2 V threshold), short-circuit tolerant outputs, and over-temperature monitoring - 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 5.5 V - supports dual alkaline, LiFeS₂, NiMH/NiCd, and USB-supplied systems without external pre-regulation. |
| VOA Output Voltage | 1.7 V to 5.2 V - programmable via VOA_V register (1.7374 V + VOA_V × 0.0306 V); fixed at 1.860 V at startup. |
| VOB Output Range | 0.8 V to 1.26 V - only available in this narrow range for EFP0104GM20-D; disabled at power-on. |
| EM2 Quiescent Current | 300 nA (single output enabled) - enables multi-year battery life in always-on sensor endpoints with periodic wake-up. |
| Peak Efficiency | Up to 94% - achieved in buck/boost or buck-only operation, critical for extending runtime in compact battery cells. |
| Package | QFN20 3×3 mm - surface-mount footprint with exposed thermal pad; top mark P04G confirms EFP0104 variant. |
| Coulomb Counter | Lossless (no sense resistor) on VDDB - enables precise battery fuel gauging for primary and rechargeable chemistries. |
Pinout & Package
Package: QFN20 (3 mm × 3 mm, 0.5 mm pitch), thermally enhanced with exposed pad. Pin 1 marked by dot; pin numbering follows standard counter-clockwise convention starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | Supplies internal ADC, temp sensor, and reference; must be decoupled near pin; accepts 1.8–5.5 V. |
| VDDB | Main power input | Primary input for DCDC A/B and LDOs; monitored for Coulomb counting and UVLO; supports 1.8–5.5 V. |
| VOA | Main regulated output | Buck/boost DC-DC output (1.7–5.2 V); powers MCU core/radio; paired with VOC LDO for improved light-load regulation. |
| VOA_SW | Firmware-controlled switch | Open-drain output enabling complete shutdown of external high-leakage circuitry during EM2/EM4 sleep modes. |
| VOB | Secondary regulated output | Buck-only DC-DC + LDO output (0.8–1.26 V); disabled at startup; used for low-voltage peripherals or RF bias rails. |
| VOC | Linear regulator output | LDO output (1.7–3.3 V); not independent - internally tied to VOA for hybrid regulation; improves efficiency near VOA voltage. |
| I2C_SDA / SCL | Config interface | Standard I²C bus (100 kHz/400 kHz) for dynamic voltage scaling, energy mode control, and status register access. |
| IRQ | Interrupt output | Active-low open-drain signal notifying host MCU of events: UVLO, over-temp, Coulomb threshold, or EM transition completion. |
| GND | Ground reference | Common analog/digital return; requires low-impedance connection to PCB ground plane and thermal pad. |
| EPAD | Thermal pad | Internally connected to GND; mandatory soldering to PCB copper pour for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Firmware-programmable VOA_SW | Enables zero-current shutdown of external sensors, radios, or memory - eliminating standby leakage beyond PMIC limits. |
| Lossless Coulomb counting on VDDB | Measures total charge delivered to system without sense resistor losses or board space penalty - essential for accurate battery lifetime prediction. |
| Direct Mode I²C control | Allows sub-10 µs transition between EM0/EM2 states - critical for duty-cycled IoT sensors requiring rapid wake/sleep cycles. |
| Coarse regulators for EM4 | Dedicated low-IQ (~150 nA) regulators per output maintain minimal bias during deepest sleep - enabling true EM4 retention without external LDOs. |
| Programmable inrush current limiting | Configurable TSW_MIN via BB_IRI_CON prevents input droop during cold-start from weak batteries or high-impedance sources. |
Applications
| Smart Meter Sensor Node | Wireless Building Thermostat |
|---|---|
|
Use Scenario: Battery-powered ultrasonic flow meter with 15-second wake interval, measuring water/gas consumption in utility infrastructure. IC Role / Device Role / Timing Role: Primary power controller supplying EFM32GG MCU core (VOA), RF transceiver bias (VOB), and analog front-end (VOC), while tracking total battery charge consumed. Use Value: 300 nA EM2 IQ extends AA alkaline battery life beyond 10 years; lossless Coulomb counting enables predictive maintenance alerts before end-of-life. |
Use Scenario: Zigbee-enabled HVAC thermostat using dual AA cells, sampling ambient temperature/humidity every 60 seconds and transmitting via Ember chip. IC Role / Device Role / Timing Role: Manages power sequencing between MCU (VOA), radio (VOB), and precision ADC reference (VOC), with VOA_SW disabling display backlight during sleep. Use Value: Wired Buck with LDO C configuration ensures stable 1.1 V rail for RF section across full battery discharge curve (1.8 V → 1.0 V); Direct Mode I²C cuts wake latency to <12 µs. |
| Portable Health Monitor | Industrial Wireless Sensor |
|
Use Scenario: CE-certified wearable pulse oximeter with optical sensor array, BLE SoC, and rechargeable LiFePO₄ battery. IC Role / Device Role / Timing Role: Delivers regulated 3.3 V (VOA), 1.1 V (VOB), and 2.5 V (VOC) while performing Coulomb counting on LiFePO₄ (2.5–3.65 V range). Use Value: 0.8–1.26 V VOB range matches BLE radio VDDIO requirements; UVLO at 1.2 V prevents brownout-induced data corruption during deep discharge. |
Use Scenario: IP67-rated vibration sensor node deployed in factory machinery, powered by lithium thionyl chloride (Li/SOCl₂) cell (3.0–3.65 V). IC Role / Device Role / Timing Role: Provides 3.3 V system rail (VOA) and 1.8 V logic rail (VOB), monitors battery health via Coulomb integration, and asserts IRQ on over-temperature event. Use Value: Supports 3.0–3.65 V Li/SOCl₂ input directly - no external buck pre-regulator needed; -40 °C to +100 °C operation ensures reliability in harsh industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270PWP | Single buck + dual LDO; no Coulomb counter; 25 µA typical IQ; supports 2.7–5.5 V input. | Lacks battery fuel gauging and ultra-low-power EM2 mode; suited for AC-powered or short-life battery systems. | Select when Coulomb counting is unnecessary and higher IQ is acceptable for cost-sensitive designs. |
| MAX77650EWL+T | Single-input, single-buck + dual-LDO PMIC; integrated fuel gauge with sense resistor; 4 µA IQ (not EM2-grade); 2.5–4.8 V input. | Requires external sense resistor for Coulomb counting; lacks VOA_SW switch and coarse EM4 regulators. | Choose for Li-ion systems needing high-accuracy fuel gauging but where 300 nA EM2 IQ and EM4 retention are not required. |
Compared with TPS65270PWP and MAX77650EWL+T, the EFP0104GM20-D uniquely combines sub-µA EM2 operation, lossless Coulomb counting, firmware-controllable power gating (VOA_SW), and EM4-optimized coarse regulators - making it the only option for decade-long primary-cell deployments with precise battery telemetry.
Availability
EFP0104GM20-D is available at Aetrix Electronics and suitable for IoT sensors and end devices, smart metering, and home/building automation requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing for battery-powered edge nodes.
Supply support for EFP0104GM20-D 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 mixed-signal ICs for IoT, industrial, and consumer markets.
The EFP01 family was designed specifically to eliminate external discrete power components in EFM32/EFR32-based battery systems - integrating multi-rail regulation, Coulomb counting, and intelligent energy-mode control into a single QFN20 package.
FAQ
What battery chemistries does the EFP0104GM20-D support?
The EFP0104GM20-D supports dual alkaline, zinc-carbon, or lithium iron-disulfide (Li/FeS₂) primary cells (1.6–3.6 V), NiMH/NiCd rechargeables (1.6–3.6 V), and USB input (<5.5 V). It does not support single-cell Li/SOCl₂ or Li-ion - those require other EFP01 variants like EFP0108GM20-E or EFP0111GM20-E. The EFP0104GM20-D's 1.8–5.5 V input range and VOB 0.8–1.26 V range make it ideal for dual-AA or dual-NiMH systems powering low-voltage radios.
How is the VOB output configured on the EFP0104GM20-D?
On the EFP0104GM20-D, VOB is configured as a buck-only DC-DC converter with an integrated parallel LDO, and it is disabled at startup. Its programmable output voltage range is strictly limited to 0.8 V–1.26 V - narrower than other EFP01 variants - and it cannot be set above 1.26 V. This configuration targets low-voltage RF peripherals such as BLE transceivers or sensor bias rails, and its disable-at-startup behavior reduces initial inrush current.
Does the EFP0104GM20-D include a Coulomb counter, and how does it work?
Yes, the EFP0104GM20-D includes a lossless Coulomb counter that measures total charge delivered to the load through the VDDB pin - without requiring an external sense resistor. It integrates current over time using internal current mirrors and delta-sigma ADC techniques, storing accumulated charge in 32-bit registers (CCB0_MSBY/LSBY, CCB2_MSBY/LSBY). This enables precise battery fuel gauging for primary and rechargeable cells, with accuracy unaffected by PCB trace resistance or thermal drift.
What is the purpose of the VOA_SW pin on the EFP0104GM20-D?
The VOA_SW pin on the EFP0104GM20-D is a firmware-controlled open-drain switch tied to the VOA output. When asserted via I²C register (VOA_SW_STAT), it disconnects external high-leakage circuitry - such as op-amps, sensors, or memory - from the VOA rail during EM2 or EM4 sleep modes. This eliminates standby current paths that would otherwise dominate system IQ, enabling true nanoamp-level system sleep and extending battery life in intermittently active IoT endpoints.
Is the EFP0104GM20-D pin-compatible with other EFP01 family members?
Yes, all EFP01 family members, including the EFP0104GM20-D, use the identical QFN20 3×3 mm package with identical pinout and footprint. Mechanical and electrical compatibility is guaranteed across the family - meaning PCB layout can be reused for different EFP01 variants. However, functional differences (e.g., VOB voltage range, startup defaults, supported configurations) require firmware reconfiguration; the EFP0104GM20-D's "Wired Buck with LDO C" mode and OFF-at-startup VOB are specific to its OPN.
EFP0104GM20-D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Series:
- EFP01
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Applications:
- Industrial Automation
- Current - Supply:
- 24nA
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
EFP0104GM20-D FAQ
1.How can I place an order for EFP0104GM20-D through Aetrix?
Please submit a Request for Quotation (RFQ) for EFP0104GM20-D 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 EFP0104GM20-D reliable?
The price and inventory of EFP0104GM20-D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFP0104GM20-D is usually 5 days.
3.What payment methods are accepted for EFP0104GM20-D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFP0104GM20-D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFP0104GM20-D?
EFP0104GM20-D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFP0104GM20-D 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 EFP0104GM20-D?
For technical support, including EFP0104GM20-D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFP0104GM20-D requirements.
6.How does Aetrix verify that EFP0104GM20-D is sourced from the original manufacturer or authorized distributors?
All EFP0104GM20-D 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 EFP0104GM20-D meets industry standards.
7.What is the process for return or replacement of EFP0104GM20-D?
All EFP0104GM20-D units undergo pre-shipment inspection (PSI). If there is an issue with EFP0104GM20-D, 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 EFP0104GM20-D part is unused and in its original packaging.
Return procedure for EFP0104GM20-D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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