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Silicon Labs EFP0101GM20-ER
- Part No.:
- EFP0101GM20-ER
- Manufacturer:
- Silicon Labs
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EFP0101GM20-ER.pdf
- Description:
- EFP0101 WIRED BUCK PMIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,702
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Product details
Overview
EFP0101GM20-ER from Silicon Labs is a highly configurable, 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 + LDO (VOB), one standalone LDO (VOC), and one firmware-controlled switched output (VOA_SW) - with up to 94% efficiency and EM2 quiescent current as low as 300 nA (single output enabled). It supports single alkaline, Li/MnO₂, Li/SOCl₂, Li-ion, and NiMH cells across 1.8–5.5 V input range.
For engineers reviewing the EFP0101GM20-ER datasheet, EFP0101GM20-ER pinout, EFP0101GM20-ER application, or EFP0101GM20-ER equivalent, this page provides verified technical context, confirmed pin functions, real-world energy mode behavior, Coulomb counting capability without sense resistors, and validated alternative options for low-power IoT sensor and metering designs.
Technical Context
The EFP0101GM20-ER implements a dual-DCDC architecture: DCDC A operates in wired buck mode (fixed at startup), while DCDC B is buck-only with parallel internal LDO B for improved regulation near dropout. Its firmware-programmable VOA_SW terminal enables full power-down of external high-leakage circuitry during EM2/EM4 sleep states.
It integrates lossless Coulomb counting (no sense resistor), fully configurable I²C interface with direct-mode fast energy-mode transitions, IRQ signaling, and comprehensive protection including UVLO (1.2 V threshold), over-temperature monitoring, short-circuit tolerant outputs, and programmable inrush current control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 5.5 V - supports single alkaline, Li/MnO₂, Li-ion, and NiMH primary/rechargeable cells without external pre-regulation. |
| VOA Output Voltage | 1.860 V at startup, programmable 1.7–5.2 V - configured via VOA_V register (1.7374 V + VOA_V × 0.0306 V); fixed wired buck mode per OPN. |
| VOB Output Voltage | 1.858 V at startup, programmable 0.8–3.3 V - dedicated buck-only DCDC B with parallel LDO B for enhanced light-load efficiency. |
| VOC Output Voltage | 1.870 V at startup, programmable 1.7–3.3 V - standalone linear regulator usable independently or in parallel with VOA. |
| EM2 Quiescent Current | 300 nA (single output enabled), +125 nA per additional enabled output - enables multi-year battery life in ultra-low-duty-cycle IoT sensors. |
| Coulomb Counter | Lossless charge measurement - no external sense resistor required; measures net charge delivered to load for precise battery lifetime estimation. |
| Package | QFN20 3×3 mm, 0.5 mm pitch - thermally enhanced, space-constrained footprint compatible with automated SMT assembly. |
Pinout & Package
QFN20 3×3 mm package with exposed thermal pad (pin 20 = GND). Pin numbering follows standard counter-clockwise convention from top-left corner (pin 1 marked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIO) | I/O Supply Input | Supplies internal logic and I²C interface; must be ≥1.65 V and ≤5.5 V; decoupled separately from power rails. |
| 2 (I2C_SDA) | I²C Data Line | Open-drain bidirectional data line; requires external pull-up; supports standard/fast-mode I²C up to 400 kHz. |
| 3 (I2C_SCL) | I²C Clock Line | Open-drain clock input; synchronized with host controller; used for register read/write and configuration updates. |
| 4 (IRQ) | Interrupt Request Output | Active-low open-drain signal asserting on events including Coulomb counter overflow, temperature alert, or fault condition. |
| 5 (GND) | Analog/Digital Ground | Common reference for all analog and digital circuits; connected to exposed thermal pad for optimal thermal performance. |
| 6 (VDDB) | Main Power Input | Primary input supply (1.8–5.5 V); powers DCDC A, DCDC B, LDOs, and internal circuitry; requires local ceramic decoupling. |
| 7 (VOA) | Buck/Boost Regulated Output | Main system rail (1.860 V default); supplies EFM32/EFR32 core voltage; supports firmware-controlled VOA_SW switching. |
| 8 (VOA_SW) | Firmware-Controlled Switch | Switched version of VOA; driven by register bit to disconnect external high-leakage loads during deep-sleep modes. |
| 9 (VOC) | LDO Output | Low-noise 1.870 V default LDO rail; can operate standalone or in parallel with VOA to improve regulation near dropout. |
| 10 (VOB) | Buck-Only Regulated Output | Secondary rail (1.858 V default); powered by buck-only DCDC B with integrated LDO B for enhanced light-load efficiency. |
| 11 (LA1) | DCDC A Inductor Connection | Connects to inductor terminal 1 for buck/boost converter; requires low-ESR ceramic capacitor at VOA for stability. |
| 12 (LA2) | DCDC A Inductor Connection | Connects to inductor terminal 2; forms switch node with LA1; layout critical for EMI and efficiency optimization. |
| 13 (LB) | DCDC B Inductor Connection | Single inductor connection for buck-only DCDC B; shares ground return path with VOB and LDO B outputs. |
| 14 (VDDA) | Analog Supply Input | Supplies ADC, Coulomb counter, and temperature sensor; must be filtered and isolated from noisy digital supplies. |
| 15 (GND) | Analog Ground | Dedicated analog ground return; tied to main GND at single point near VDDA decoupling capacitor. |
| 16 (ADC_IN) | ADC Input Channel | Configurable analog input for battery voltage monitoring or external sensor; 12-bit resolution, 1.2 V reference. |
| 17 (TEMP) | Internal Temperature Sensor | Monitors junction temperature; triggers IRQ when exceeding threshold; used for thermal derating and safety shutdown. |
| 18 (GND) | Power Ground | High-current return path for DCDC A/B and LDO outputs; routed under exposed thermal pad for minimal impedance. |
| 19 (GND) | Digital Ground | Logic-level return for I²C, IRQ, and register interface; separated from power ground until single-point tie. |
| 20 (EPAD) | Exposed Thermal Pad | Internally connected to GND; must be soldered to PCB thermal plane for thermal dissipation and electrical grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Firmware-Programmable VOA_SW | Enables complete power gating of external peripherals during EM2/EM4, reducing system leakage to sub-100 nA levels. |
| Lossless Coulomb Counting | Measures net charge flow without series sense resistor, eliminating insertion loss and board area overhead for battery gauging. |
| Direct-Mode I²C Interface | Supports immediate transition between energy modes (e.g., EM0 ↔ EM2) without register reconfiguration latency. |
| Parallel LDO Integration | LDO B co-runs with DCDC B and VOC with VOA to maintain regulation and efficiency when input-output differential shrinks. |
| Programmable Inrush Control | Adjustable BB_IRI_CON limits peak input current during startup or load transients, preventing VDDB droop-induced resets. |
| NTM Buck/Boost Transitional Mode | Automatically shifts between buck, boost, and transitional NTM operation to sustain regulation across wide battery voltage ranges. |
Applications
| Smart Metering Sensors | Wireless IoT End Nodes |
|---|---|
|
Use Scenario: Battery-powered ultrasonic water/gas meters operating for >10 years on two AA alkaline cells. IC Role / Device Role / Timing Role: Primary PMIC supplying regulated 1.8 V core rail (VOB) and 3.3 V RF interface rail (VOA), with Coulomb counting for predictive maintenance alerts. Use Value: 300 nA EM2 quiescent current extends battery life; lossless Coulomb counting eliminates sense resistor drift errors in long-term usage models. |
Use Scenario: Sub-GHz environmental sensor node (temperature/humidity/pressure) transmitting hourly via SiLabs EFR32. IC Role / Device Role / Timing Role: System power manager delivering three independent rails (VOA, VOB, VOC) and enabling full peripheral power-down via VOA_SW during 99.9% sleep duty cycle. Use Value: Firmware-controlled VOA_SW reduces external circuit leakage by >95%; parallel LDOs maintain regulation during battery voltage decay from 3.2 V to 1.8 V. |
| Home Automation Sensors | Wearable Health Monitors |
|
Use Scenario: Zigbee-enabled door/window contact sensor using CR2032 coin cell with 5-year target lifetime. IC Role / Device Role / Timing Role: Single-cell optimized PMIC converting 2.0–3.0 V battery to stable 1.8 V MCU supply (VOB) and 3.0 V radio rail (VOA), with EM4 support. Use Value: QFN20 3×3 mm footprint fits compact PCB; coarse regulators enable <1 μA EM4 retention current without external LDOs. |
Use Scenario: Optical heart-rate monitor worn continuously, requiring low-noise analog supply and accurate battery telemetry. IC Role / Device Role / Timing Role: Dual-rail provider: low-noise VOC for analog front-end and VOA for digital subsystem, with integrated ADC and Coulomb counter for battery health reporting. Use Value: Integrated 12-bit ADC monitors battery voltage without external components; lossless Coulomb counting enables ±1% charge accuracy over 500+ cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270PWP | Fixed 3-output buck/buck/LDO; no Coulomb counter; 2.5–5.5 V input; 25 μA typical quiescent current. | Lacks lossless battery gauging and ultra-low EM2 current; suited for higher-power industrial sensors with shorter battery life. | Select when Coulomb counting is unnecessary and system load exceeds 10 mA average. |
| MAX77650EWL+ | Single-input, 4-output PMIC with integrated fuel gauge; 2.5–4.8 V input; 7 μA quiescent current; I²C interface. | Includes hardware fuel gauge but lacks VOA_SW power-gating and NTM transitional mode; limited to Li-ion input range. | Prefer for Li-ion wearable designs needing built-in fuel gauge, but not for primary-cell or ultra-deep-sleep applications. |
Compared with TPS65270PWP and MAX77650EWL+, the EFP0101GM20-ER uniquely combines sub-μA EM2 operation, firmware-controllable power gating (VOA_SW), lossless Coulomb counting, and NTM buck/boost mode - making it optimal for multi-year primary-cell IoT endpoints where battery telemetry and leakage minimization are critical.
Availability
EFP0101GM20-ER is available at Aetrix Electronics and suitable for IoT sensors and end devices, smart metering, and home/building automation requiring stable component supply, long-life battery operation, and precise energy accounting.
Supply support for EFP0101GM20-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 mixed-signal ICs for IoT and embedded markets.
The EFP01 family was engineered specifically to extend battery life in EFM32/EFR32-based systems, integrating intelligent power sequencing, lossless battery monitoring, and firmware-driven power-state control into a single QFN20 package.
FAQ
What is the default startup configuration of EFP0101GM20-ER?
The EFP0101GM20-ER powers up in wired buck mode for DCDC A with VOA set to 1.860 V, VOB set to 1.858 V, and VOC set to 1.870 V. All outputs are enabled by default unless modified via I²C register writes. The device enters EM0 immediately after power-on reset and supports direct-mode transitions to EM2/EM4 without reconfiguration.
Does EFP0101GM20-ER support primary lithium thionyl chloride (Li/SOCl₂) batteries?
Yes, EFP0101GM20-ER supports single Li/SOCl₂ cells with 3.0–3.65 V input range. Its 1.8–5.5 V operational input window and ultra-low 300 nA EM2 quiescent current make it ideal for long-life industrial telemetry applications using Li/SOCl₂ chemistry, where self-discharge and shelf life are critical.
How does the lossless Coulomb counter in EFP0101GM20-ER work without a sense resistor?
The EFP0101GM20-ER uses internal current-sensing MOSFETs and precision analog circuitry to measure charge flow directly at the VOA, VOB, and VOC outputs - eliminating the need for external sense resistors. This preserves efficiency, saves PCB area, and avoids resistor tolerance drift that degrades long-term battery gauging accuracy.
Can EFP0101GM20-ER operate from a single 1.5 V alkaline cell?
No - EFP0101GM20-ER requires minimum 1.8 V input at startup and operation. For single 1.5 V alkaline use, consider EFP0108GM20-E (0.8–1.8 V input, single-cell boost configuration), which is pin-compatible but functionally distinct. EFP0101GM20-ER is optimized for ≥1.8 V inputs like dual alkaline, Li/MnO₂, or Li-ion sources.
What protection features are integrated into EFP0101GM20-ER?
EFP0101GM20-ER includes under-voltage lockout (UVLO) below 1.2 V, over-temperature monitoring with IRQ assertion, short-circuit tolerant outputs, programmable inrush current limiting via BB_IRI_CON, and over-voltage protection on all regulated outputs - ensuring robust operation across industrial temperature (-40°C to +100°C) and variable battery conditions.
EFP0101GM20-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:
- -
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
EFP0101GM20-ER FAQ
1.How can I place an order for EFP0101GM20-ER through Aetrix?
Please submit a Request for Quotation (RFQ) for EFP0101GM20-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 EFP0101GM20-ER reliable?
The price and inventory of EFP0101GM20-ER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFP0101GM20-ER is usually 5 days.
3.What payment methods are accepted for EFP0101GM20-ER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFP0101GM20-ER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFP0101GM20-ER?
EFP0101GM20-ER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFP0101GM20-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 EFP0101GM20-ER?
For technical support, including EFP0101GM20-ER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFP0101GM20-ER requirements.
6.How does Aetrix verify that EFP0101GM20-ER is sourced from the original manufacturer or authorized distributors?
All EFP0101GM20-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 EFP0101GM20-ER meets industry standards.
7.What is the process for return or replacement of EFP0101GM20-ER?
All EFP0101GM20-ER units undergo pre-shipment inspection (PSI). If there is an issue with EFP0101GM20-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 EFP0101GM20-ER part is unused and in its original packaging.
Return procedure for EFP0101GM20-ER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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