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Silicon Labs EFP0104GM20-DR
- Part No.:
- EFP0104GM20-DR
- Manufacturer:
- Silicon Labs
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EFP0104GM20-DR.pdf
- Description:
- EFP0104 WIRED BUCK PMIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,625
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Product details
Overview
EFP0104GM20-DR from Silicon Labs is a highly configurable, ultra-low-quiescent-current PMIC optimized for battery-powered EFM32/EFR32 systems. It delivers four regulated outputs - one buck/boost DC-DC (VOA), one buck-only DC-DC with integrated LDO (VOB), one standalone LDO (VOC), and one firmware-controlled switched output (VOA_SW) - supporting input voltages from 1.8 V to 5.5 V and achieving up to 94% efficiency. Its 300 nA EM2 quiescent current (single output enabled) and lossless Coulomb counting enable multi-year operation in IoT sensors and wearables.
For engineers reviewing the EFP0104GM20-DR datasheet, EFP0104GM20-DR pinout, EFP0104GM20-DR application, or EFP0104GM20-DR equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (Wired Buck with LDO C, VOB disabled at startup), real-world application constraints, and two rigorously cross-checked alternative parts for low-power embedded power management selection.
Technical Context
The EFP0104GM20-DR implements a Wired Buck with LDO C configuration: DCDC A operates exclusively in wired buck mode (BB_CTRL3.BB_MODE = 5), while VOB is factory-configured OFF at startup and programmable only within 0.8–1.26 V range. VOC is paired with VOA and not independently enabled.
Its power architecture includes lossless Coulomb counting (no sense resistor), fully configurable I²C interface with Direct Mode for rapid energy-mode transitions, IRQ assertion on over-temperature or UVLO, and safety features including programmable inrush current, short-circuit tolerant outputs, and UVLO hold below 1.2 V on VDDB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 5.5 V - supports single Li/MnO₂, dual alkaline, USB, and NiMH/NiCd sources without external pre-regulation. |
| Quiescent Current (EM2) | 300 nA with one output enabled - enables >10-year battery life in always-on sensor nodes using EM2 sleep. |
| DCDC A Output (VOA) | 1.7 V to 5.2 V, fixed wired buck mode - eliminates boost-mode complexity and reduces BOM count vs buck/boost variants. |
| VOB Startup State | OFF - reduces system power-up leakage; configurable to 0.8–1.26 V only after initialization via I²C. |
| Coulomb Counter | Lossless, no external sense resistor - enables precise battery fuel gauging in space-constrained wearables and meters. |
| Package | QFN20 3×3 mm, 0.5 mm pitch - compatible with standard reflow profiles and high-density PCB layouts. |
| Operating Temperature | −40 °C to +100 °C junction - qualified for industrial and outdoor metering applications without derating. |
Pinout & Package
Package: QFN20 (3 mm × 3 mm, 0.5 mm pitch), wettable flank, exposed thermal pad (GND). Compliant with JEDEC MO-220.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | Primary input for internal analog circuitry and ADC; must be decoupled with 1 µF ceramic capacitor. |
| VDDB | Power input for DCDCs/LDOs | Supplies DCDC A, DCDC B, LDO B, and LDO C; requires 4.7 µF low-ESR ceramic capacitor. |
| VOA | Main regulated output (buck) | Configurable 1.7–5.2 V output; supports parallel LDO C for improved light-load regulation. |
| VOA_SW | Firmware-controlled switch | Enables complete power-down of external high-leakage circuits (e.g., RF front-end) during EM2/EM4. |
| VOB | Secondary regulated output | 0.8–1.26 V output; disabled at startup; requires I²C write to enable and set voltage. |
| VOC | LDO output (paired with VOA) | Not independent - used only in parallel with VOA to improve regulation near input-output crossover. |
| I2C_SDA / I2C_SCL | I²C bidirectional data/clock | Standard-mode (100 kHz) and fast-mode (400 kHz) compatible; pull-ups required externally. |
| IRQ | Interrupt request output | Open-drain active-low signal asserting on UVLO, over-temperature, or Coulomb counter threshold events. |
| GND | Ground reference | All ground pins (including thermal pad) must be connected to a low-impedance PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Wired Buck with LDO C Configuration | Eliminates boost-mode control complexity and associated inductor/compensation tuning; LDO C improves regulation when VDDB ≈ VOA. |
| Firmware-Programmable VOA_SW | Allows host MCU to cut power to external peripherals (e.g., sensors, radios) during deep-sleep, reducing system standby current by >10×. |
| Lossless Coulomb Counting | Measures charge flow without series sense resistor - preserves PCB area and avoids 10–50 mΩ insertion loss in battery path. |
| Ultra-Low EM2 Quiescent Current | 300 nA with VOA enabled - sets benchmark for sub-µA system-level sleep in battery-gauged devices. |
| Short-Circuit Tolerant Outputs | Withstands indefinite VOA/VOB/VOC short to GND without latch-up or damage - simplifies protection design in field-deployed sensors. |
Applications
| IoT Environmental Sensor Node | Smart Water/Gas Meter |
|---|---|
|
Use Scenario: Battery-powered ultrasonic flow sensor with BLE transmission every 15 minutes in remote utility infrastructure. IC Role / Device Role / Timing Role: Primary power manager supplying 3.3 V to MCU and 1.1 V to analog front-end; coordinates EM2 wake-up and Coulomb-counted battery depletion alerts. Use Value: 300 nA EM2 current extends 2× AA alkaline life to >12 years; VOA_SW powers down ultrasonic transducer between readings, eliminating standby leakage. |
Use Scenario: Tamper-resistant municipal water meter with 10-year sealed battery, pulse counting, and LoRaWAN backhaul. IC Role / Device Role / Timing Role: System PMIC delivering 1.8 V to metrology ASIC and 3.3 V to LoRa transceiver; triggers IRQ on low-battery threshold for proactive replacement scheduling. Use Value: Lossless Coulomb counting enables ±1.5% fuel gauge accuracy over full temperature range; short-circuit tolerance prevents field failure from sensor wiring faults. |
| Industrial Wireless Vibration Monitor | Medical Patch Sensor |
|
Use Scenario: Self-powered predictive maintenance node on rotating machinery, sampling accelerometer data every 5 seconds and transmitting hourly. IC Role / Device Role / Timing Role: Power controller enabling synchronized EM2 sleep/wake cycles; manages VOA/VOB sequencing to avoid rail collapse during MCU boot. Use Value: Wired Buck mode ensures stable 2.8 V supply across 1.8–5.5 V input swing of Li-SOCl₂ primary cell; −40 °C to +100 °C rating supports harsh motor environments. |
Use Scenario: Disposable ECG patch with 3-month wearable life, requiring clinical-grade battery monitoring and ultra-low leakage. IC Role / Device Role / Timing Role: Single-chip power solution generating 1.2 V for analog signal chain and 3.0 V for Bluetooth LE radio; integrates Coulomb counter for FDA-compliant battery reporting. Use Value: No external sense resistor preserves miniaturized flex PCB layout; 0.8–1.26 V VOB range precisely matches low-voltage op-amp rails, minimizing headroom loss. |
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, 4-output PMIC with integrated charger; 700 nA shutdown current; no lossless Coulomb counter. | Requires external battery charger; lacks EM2-optimized quiescent current and precision fuel gauging. | Select when USB charging capability is mandatory and battery runtime >5 years is not required. |
| TPS65270 | Dual-buck + dual-LDO PMIC; 25 µA typical quiescent current; no integrated Coulomb counter or I²C configurability. | Designed for higher-power industrial MCUs; lacks ultra-low-power sleep modes and firmware-controlled switching. | Select for 3.3/1.2 V dual-rail systems with >10 mA average load where EM2 optimization is unnecessary. |
Compared with MAX77650 and TPS65270, the EFP0104GM20-DR uniquely combines sub-µA EM2 operation, lossless Coulomb counting, and firmware-programmable power gating - making it the only viable option for decade-life, battery-fueled edge sensors requiring certified fuel gauging and zero-maintenance deployment.
Availability
EFP0104GM20-DR is available at Aetrix Electronics and suitable for IoT sensors, smart meters, and medical wearables requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing for ISO 13485 and IEC 62304 compliance.
Supply support for EFP0104GM20-DR 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 and energy-efficient analog/mixed-signal ICs for IoT, industrial, and consumer markets.
The EFP01 family was designed specifically to extend battery life in EFM32/EFR32-based systems, integrating multi-rail power conversion, precision battery monitoring, and intelligent energy-mode coordination into a single QFN package.
FAQ
What is the default VOB startup state for EFP0104GM20-DR?
The EFP0104GM20-DR has VOB configured OFF at power-on reset. This is a factory-programmed setting per Table 3.1 OPN-Specific Features. To enable VOB, the host MCU must issue an I²C write to the VOB_EM0_V register after initialization. The output voltage is then programmable within 0.8 V to 1.26 V, and remains disabled until explicitly enabled - reducing initial system leakage.
Does EFP0104GM20-DR support buck/boost operation?
No. The EFP0104GM20-DR is hard-configured for Wired Buck with LDO C mode (BB_CTRL3.BB_MODE = 5), as confirmed in Table 3.1 and Section 4.1.2. Unlike EFP0106/EFP0107, it cannot operate in buck/boost or boost-only configurations. Its DCDC A is strictly a buck converter, simplifying design validation and eliminating boost-related compensation challenges.
How does the lossless Coulomb counter in EFP0104GM20-DR work without a sense resistor?
The EFP0104GM20-DR uses internal current-sensing MOSFET structures and calibrated on-die measurement paths to monitor charge flow through VDDB. This eliminates the need for an external sense resistor, avoiding its 10–50 mΩ insertion loss and PCB area penalty. Accuracy is maintained across −40 °C to +100 °C via factory-trimmed calibration stored in OTP, and the counter integrates seamlessly with the I²C interface for host-read fuel gauge data.
What is the purpose of the VOA_SW pin on EFP0104GM20-DR?
The VOA_SW pin on EFP0104GM20-DR is a firmware-controlled switch that disconnects the VOA output from external high-leakage circuitry (e.g., RF transceivers, analog sensors) during EM2/EM4 sleep modes. Controlled via the VOA_SW_STAT register, it enables true zero-current standby for subsystems - reducing total system quiescent current beyond what VOA regulation alone achieves, critical for >10-year battery life.
Is EFP0104GM20-DR pin-compatible with other EFP01 family members?
Yes - all EFP01 family members, including EFP0104GM20-DR, use the identical QFN20 3×3 mm package with identical pinout per Section 8.1. However, functional differences exist: VOB startup state, DCDC A mode, and VOC pairing are OPN-specific. Hardware layout is reusable across the family, but firmware initialization sequences must match the specific OPN's configuration (e.g., EFP0104 requires VOB enable command; EFP0101 does not).
EFP0104GM20-DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Series:
- EFP01
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-DR FAQ
1.How can I place an order for EFP0104GM20-DR through Aetrix?
Please submit a Request for Quotation (RFQ) for EFP0104GM20-DR 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-DR reliable?
The price and inventory of EFP0104GM20-DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFP0104GM20-DR is usually 5 days.
3.What payment methods are accepted for EFP0104GM20-DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFP0104GM20-DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFP0104GM20-DR?
EFP0104GM20-DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFP0104GM20-DR 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-DR?
For technical support, including EFP0104GM20-DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFP0104GM20-DR requirements.
6.How does Aetrix verify that EFP0104GM20-DR is sourced from the original manufacturer or authorized distributors?
All EFP0104GM20-DR 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-DR meets industry standards.
7.What is the process for return or replacement of EFP0104GM20-DR?
All EFP0104GM20-DR units undergo pre-shipment inspection (PSI). If there is an issue with EFP0104GM20-DR, 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-DR part is unused and in its original packaging.
Return procedure for EFP0104GM20-DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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