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Silicon Labs EFP0104GM20-ER
- Part No.:
- EFP0104GM20-ER
- Manufacturer:
- Silicon Labs
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EFP0104GM20-ER.pdf
- Description:
- EFP0104 WIRED BUCK WITH LDO PMIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
EFP0104GM20-ER from Silicon Labs is a highly efficient, firmware-configurable Energy Friendly Power Management IC (PMIC) designed for ultra-low-power battery-powered 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 key role is system-level power regulation and Coulomb counting for EFM32/EFR32 microcontrollers in energy-constrained IoT sensor nodes.
For engineers reviewing the EFP0104GM20-ER datasheet, EFP0104GM20-ER pinout, EFP0104GM20-ER application, or EFP0104GM20-ER equivalent, this page provides verified technical context on its wired-buck-with-LDO-C configuration, EM2 quiescent current of 300 nA (single output enabled), VOB startup state (OFF), and QFN20 3×3 mm package - all critical for low-power design validation and BOM selection.
Technical Context
The EFP0104GM20-ER implements a fixed wired-buck-with-LDO-C configuration: DCDC A operates exclusively in wired-buck mode (BB_CTRL3.BB_MODE = 5), while VOB is disabled at startup and programmable only within 0.8 V–1.26 V. VOC is not available as an independent output and is instead paired with VOA for parallel regulation.
It supports full I²C configuration, IRQ signaling, lossless Coulomb counting, and safety features including UVLO (1.2 V threshold), short-circuit tolerant outputs, and over-temperature monitoring. Its EM2 quiescent current scales linearly: 150 nA (no outputs), +150 nA per enabled output, totaling 300 nA with one output active.
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 biasing. |
| VOA Output Type | Buck-only DC-DC converter - fixed wired-buck topology (not buck/boost or boost-only); requires external inductor. |
| VOB Startup State | OFF - VOB output is disabled at power-up and must be enabled via I²C register write (VOB_EM0_V/VOB_EM2_V). |
| VOC Availability | Not independent - VOC is internally paired with VOA and cannot be used as a third standalone supply rail. |
| EM2 Quiescent Current | 300 nA with single output enabled - enables multi-year operation in battery-powered EM2 sleep states. |
| Package | QFN20 3×3 mm, 0.5 mm pitch - surface-mount, thermally enhanced, compatible with standard reflow profiles. |
| Coulomb Counter | Lossless, no sense resistor - measures charge delivered to load using internal current sensing for battery life estimation. |
Pinout & Package
Package: QFN20 (3 mm × 3 mm, 0.5 mm pitch), exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary analog/digital return path; must be connected to low-impedance PCB ground plane. |
| VDDB | Main input supply | Accepts 1.8–5.5 V input; powers DCDC B, LDO B/C, and internal circuitry; UVLO triggers below 1.2 V. |
| VOA | Main regulated output | Buck-only DC-DC output (1.7–5.2 V); supports parallel LDO C regulation; drives high-current loads. |
| VOA_SW | Firmware-controlled switch | Enables complete power-down of external high-leakage circuitry during EM2/EM4; open-drain, 3.3 V tolerant. |
| VOB | Secondary regulated output | Buck-only output (0.8–1.26 V); disabled at startup; requires I²C enable and voltage programming. |
| VOC | LDO output (paired) | Not independent - only functions in parallel with VOA to improve regulation near VDDB ≈ VOA; no standalone use. |
| I²C_SDA / I²C_SCL | Configuration interface | Standard I²C bus (100 kHz/400 kHz); supports direct-mode fast transitions between energy modes. |
| IRQ | Interrupt output | Active-low open-drain signal notifying host MCU of events (UVLO, over-temp, Coulomb threshold, etc.). |
| VDDA | Analog supply | Internal 1.8 V regulator output; powers ADC, Coulomb counter, and temp sensor; decoupling required. |
| VIO | I/O supply | Supplies I²C and IRQ logic; tracks VDDB but clamped to 3.3 V max; enables level-shifting for mixed-voltage systems. |
Key Features
| Feature | Design Value |
|---|---|
| Firmware-programmable VOA_SW | Enables zero-leakage shutdown of external peripherals (e.g., sensors, RF modules) in EM2/EM4, extending battery life. |
| Lossless Coulomb counting | Measures total charge delivered without series sense resistor, preserving efficiency and PCB area in space-constrained designs. |
| Dual-mode EM2 quiescent control | 150 nA base +150 nA per enabled output - allows precise trade-off between active rail count and sleep current budget. |
| Integrated safety monitoring | Hardware UVLO (1.2 V), over-temperature IRQ assertion, and short-circuit tolerant outputs reduce need for external protection. |
| Configurable I²C interface | Supports direct-mode energy mode transitions and register-level control of all outputs, enabling dynamic power policy adaptation. |
Applications
| Smart Metering Sensor Node | Wireless Home Security Sensor |
|---|---|
Use Scenario: Battery-powered ultrasonic flow meter with 10-year target lifetime, operating in EM2 >99.9% of time. IC Role / Device Role / Timing Role: Primary PMIC regulating MCU core (VOB), radio transceiver (VOA), and analog front-end (VDDA); performs Coulomb-based battery health tracking. Use Value: 300 nA EM2 quiescent current with single-rail active enables >10-year operation on two AA alkaline cells; lossless Coulomb counting eliminates sense resistor error. |
Use Scenario: Door/window contact sensor using sub-GHz RF, waking every 5 minutes to report status. IC Role / Device Role / Timing Role: Powers EFM32 MCU (VOB), Si446x transceiver (VOA), and magnetic reed switch interface; manages wake/sleep sequencing via IRQ and VOA_SW. Use Value: VOA_SW cuts leakage of RF IC and sensor bias circuitry during sleep; I²C direct-mode enables <10 µs wake latency from EM2. |
| Wearable Health Monitor | Industrial Wireless Temperature Node |
Use Scenario: Optical heart-rate monitor powered by single CR2032 coin cell, requiring stable 1.1 V for MCU and 3.3 V for LED drivers. IC Role / Device Role / Timing Role: Generates VOB (1.1 V) for MCU core and VOA (3.3 V) for optical subsystem; uses VOC in parallel with VOA to maintain tight regulation during LED pulse current surges. Use Value: Wired-buck-with-LDO-C configuration ensures minimal output ripple under dynamic load; 94% peak efficiency extends usable battery capacity. |
Use Scenario: IP66-rated temperature node deployed in remote HVAC ducts, powered by two AA lithium cells (1.8–3.2 V range). IC Role / Device Role / Timing Role: Regulates EFR32 wireless SoC (VOB), precision ADC (VDDA), and RS-485 transceiver (VOA); monitors battery voltage and temperature via integrated ADC and sensor. Use Value: Wide 1.8–5.5 V input range accommodates full lithium primary cell discharge curve; over-temperature IRQ triggers safe shutdown before sensor drift occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFP0103GM20-E | Same QFN20 package and wired-buck-with-LDO-C configuration, but VOB enabled at startup (1.858 V) and VOC available as independent output. | Suitable when dual-rail startup is required and VOC must power separate analog circuitry (e.g., external op-amps). | Select EFP0103GM20-E if immediate VOB availability and standalone VOC are needed; otherwise EFP0104GM20-ER reduces boot-time configuration overhead. |
| EFP0107GM20-E | Same package but configured for autonomous buck/boost (BB_MODE = 1); supports wider input range (1.8–5.5 V) and automatic mode transition near VDDB ≈ VOA. | Required for applications with variable input (e.g., USB + battery backup) where VDDB may dip below or exceed VOA during operation. | Choose EFP0107GM20-E only if true buck/boost behavior is essential; EFP0104GM20-ER offers lower complexity and higher efficiency in fixed-buck scenarios. |
Compared with EFP0103GM20-E and EFP0107GM20-E, the EFP0104GM20-ER trades startup flexibility and topology adaptability for deterministic wired-buck operation, simplified register initialization, and guaranteed lowest EM2 current when VOB remains disabled - ideal for cost-sensitive, fixed-rail IoT endpoints.
Availability
EFP0104GM20-ER is available at Aetrix Electronics and suitable for IoT sensors and end devices, home/building automation systems, and wearable health monitors requiring stable component supply across multi-year production cycles.
Supply support for EFP0104GM20-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 markets.
The EFP01 family was designed specifically to extend battery life in EFM32/EFR32-based systems through ultra-low-quiescent PMIC architectures, integrated Coulomb counting, and firmware-adaptable power policies - targeting long-life, maintenance-free edge nodes.
FAQ
What is the default startup state of VOB on the EFP0104GM20-ER?
The EFP0104GM20-ER powers up with VOB output disabled (OFF). This is a fixed OPN-specific behavior confirmed in Table 2.1 and Table 3.1 of the datasheet. To activate VOB, the host MCU must issue an I²C write to configure VOB_EM0_V and VOB_EM2_V registers and set the enable bit - no hardware strapping or OTP setting overrides this.
Does the EFP0104GM20-ER support buck/boost operation?
No, the EFP0104GM20-ER does not support buck/boost operation. It is factory-configured for wired-buck-with-LDO-C mode (BB_CTRL3.BB_MODE = 5), as specified in Table 3.1 and Section 3.2.1. Attempting to reprogram BB_MODE to 1 (autonomous buck/boost) will not yield functional operation and is outside the validated configuration for this OPN.
Can VOC be used as an independent third output on the EFP0104GM20-ER?
No, VOC cannot be used independently on the EFP0104GM20-ER. Per Table 3.1 and Section 3.2.3, VOC is "Not available (Paired with VOA)" for this OPN. It functions solely as a coarse LDO in parallel with VOA to improve regulation when VDDB approaches VOA voltage - it has no dedicated enable/disable control or output voltage programming register.
What is the maximum efficiency achievable with the EFP0104GM20-ER?
The EFP0104GM20-ER achieves up to 94% peak efficiency, as measured under typical conditions with DCDC A in buck mode and moderate load (per Section 1 and Figure 5.2.1). This value is confirmed across the EFP01 family and applies directly to the EFP0104GM20-ER's wired-buck configuration - no derating or variant-specific reduction is specified.
How does the Coulomb counter function on the EFP0104GM20-ER?
The EFP0104GM20-ER implements a lossless Coulomb counter that measures charge delivered to the load without an external sense resistor. It uses internal current sensing within the DCDC A power path, with resolution and calibration controlled via CC_CAL and CC_MODE registers. Data is stored in CCA_MSBY/LSBY registers and accessible via I²C - identical in architecture to other EFP01 variants.
EFP0104GM20-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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
EFP0104GM20-ER FAQ
1.How can I place an order for EFP0104GM20-ER through Aetrix?
Please submit a Request for Quotation (RFQ) for EFP0104GM20-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 EFP0104GM20-ER reliable?
The price and inventory of EFP0104GM20-ER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFP0104GM20-ER is usually 5 days.
3.What payment methods are accepted for EFP0104GM20-ER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFP0104GM20-ER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFP0104GM20-ER?
EFP0104GM20-ER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFP0104GM20-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 EFP0104GM20-ER?
For technical support, including EFP0104GM20-ER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFP0104GM20-ER requirements.
6.How does Aetrix verify that EFP0104GM20-ER is sourced from the original manufacturer or authorized distributors?
All EFP0104GM20-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 EFP0104GM20-ER meets industry standards.
7.What is the process for return or replacement of EFP0104GM20-ER?
All EFP0104GM20-ER units undergo pre-shipment inspection (PSI). If there is an issue with EFP0104GM20-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 EFP0104GM20-ER part is unused and in its original packaging.
Return procedure for EFP0104GM20-ER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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