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Silicon Labs EFP0103GM20-E
- Part No.:
- EFP0103GM20-E
- Manufacturer:
- Silicon Labs
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EFP0103GM20-E.pdf
- Description:
- EFP0103 WIRED BUCK WITH LDO PMIC
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
EFP0103GM20-E from Silicon Labs is a highly integrated, ultra-low-power PMIC designed for energy-constrained EFM32/EFR32-based systems. It delivers four regulated outputs - including a configurable buck DC-DC (VOA), a dedicated buck-only DC-DC with parallel LDO (VOB), an independent LDO (VOC), and a firmware-controlled switched output (VOA_SW) - across 0.8–5.5 V input, with 300 nA quiescent current in EM2 mode (single output enabled) and up to 94% peak efficiency.
For engineers reviewing the EFP0103GM20-E datasheet, EFP0103GM20-E pinout, EFP0103GM20-E application, or EFP0103GM20-E equivalent, this page provides verified technical context, exact pin functions, confirmed battery compatibility (single/dual alkaline, Li/FeS₂, Li/MnO₂, Li/SOCl₂, Li-ion, LiFePO₄, NiMH/NiCd, USB), and validated alternative selection guidance for IoT sensor nodes, metering, and wearable health devices.
Technical Context
The EFP0103GM20-E implements a "Wired Buck with LDO C" configuration: DCDC A operates exclusively in wired-buck mode (not buck/boost or boost), while LDO C is internally wired in parallel with VOA to improve regulation near input-output voltage crossover. This dual-path architecture enables seamless transition between switching and linear regulation without firmware intervention.
It supports full I²C programmability (including per-energy-mode output voltage registers VOB_EM0_V/VOB_EM2_V), lossless coulomb counting, over-temperature IRQ assertion, and under-voltage lockout below 1.2 V on VDDB. All outputs feature short-circuit tolerance and programmable inrush current control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 5.5 V - matches standard single/dual primary cell and USB supply rails; excludes sub-1.8 V operation supported by other EFP01 variants. |
| VOA Output Mode | Wired Buck only - fixed topology; no boost or buck/boost capability; requires external inductor LA. |
| VOB Startup Voltage | 1.858 V - factory-programmed default; adjustable via VOB_EM0_V/VOB_EM2_V registers for EM0/EM2 modes. |
| Quiescent Current (EM2) | 300 nA with one output enabled - enables multi-year battery life in always-on sensor endpoints. |
| Package | QFN20 3×3 mm - surface-mount, thermally enhanced, with exposed thermal pad; top mark P03G. |
| Coulomb Counter | Lossless (no sense resistor) - measures charge delivered to load using internal current sensing; supports battery lifetime estimation. |
| Output Count | 4 regulated supplies: VOA (buck), VOB (buck + LDO), VOC (LDO), VOA_SW (switched rail) - enables complete system power tree from one IC. |
Pinout & Package
Package: QFN20 (3 mm × 3 mm, 0.5 mm pitch), thermally enhanced with exposed pad. Compliant with JEDEC MO-220, RoHS and REACH.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | Primary analog domain input (0.8–5.5 V); powers ADC, coulomb counter, and internal references. |
| VDDB | Power input for DCDC B & LDOs | Input for buck converter B and LDO B/C; must be ≥1.8 V for EFP0103GM20-E operation. |
| VOA | Main regulated output (DCDC A) | Buck-only output (1.7–5.2 V); paired with VOC LDO for improved light-load regulation. |
| VOA_SW | Firmware-controlled switched rail | Enables complete power-down of high-leakage peripherals (e.g., RF front-end, sensors) in low-power modes. |
| VOB | Secondary regulated output (DCDC B + LDO) | Buck-only output (0.8–3.3 V); includes parallel coarse LDO for EM4 retention. |
| VOC | Independent LDO output | LDO-only output (1.7–3.3 V); used standalone or paralleled with VOA for seamless buck-to-LDO transition. |
| I2C_SDA / I2C_SCL | I²C bidirectional data/clock | Fully configurable I²C interface (up to 400 kHz); supports direct-mode fast energy-mode transitions. |
| IRQ | Interrupt request output | Open-drain active-low signal for over-temperature, UVLO, or coulomb counter threshold events. |
| GND | Ground reference | Common return for analog/digital domains; connects to exposed thermal pad for thermal dissipation. |
| VIO | I/O supply voltage | Logic-level reference (1.65–3.6 V) for I²C and IRQ pins; decoupled separately for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Wired Buck with LDO C topology | Eliminates need for external LDO bypass components; enables automatic VOA/VOC parallel operation when VDDB ≈ VOA for <1% output droop at light loads. |
| Firmware-programmable VOA_SW | Allows host MCU to gate power to external circuitry (e.g., BLE radio, environmental sensors) during EM2/EM4, reducing system standby current to <1 µA. |
| Lossless coulomb counter | Tracks total charge delivered to load without series sense resistor - preserves PCB area, avoids power loss, and enables accurate battery SOC estimation. |
| Per-energy-mode output voltage registers | VOB_EM0_V and VOB_EM2_V allow independent optimization: higher VOB in EM0 for performance, lower VOB in EM2 for leakage reduction. |
| Short-circuit tolerant outputs | All regulated outputs survive indefinite short-to-ground without latch-up or damage - critical for field-deployed IoT nodes with unattended operation. |
| Programmable inrush current | BB_IRI_CON register limits peak battery current during startup or mode transitions - prevents brown-out in weak primary cells (e.g., aged alkaline). |
Applications
| Smart Utility Metering | Low-Power Wearable Health Monitor |
|---|---|
|
Use Scenario: Battery-powered gas/water meter with ultrasonic flow sensing, LoRaWAN backhaul, and 10-year lifespan requirement. IC Role / Device Role / Timing Role: Central PMIC supplying 3.3 V to MCU and radio, 1.8 V to sensor interface, and gated 2.8 V to ultrasonic transducer driver only during measurement bursts. Use Value: 300 nA EM2 quiescent current extends battery life; VOA_SW enables transducer power gating; coulomb counter validates battery aging models. |
Use Scenario: Disposable ECG patch with continuous 24/7 monitoring, Bluetooth LE connectivity, and CR2032 coin-cell power. IC Role / Device Role / Timing Role: Single-chip power manager delivering 1.2 V to analog front-end, 3.0 V to BLE SoC, and dynamically switching VOA_SW to disconnect display backlight during sleep. Use Value: Wired Buck + LDO C ensures stable 1.2 V under varying battery voltage (2.0–3.0 V); lossless coulomb counter correlates discharge with clinical event logs. |
| Industrial Wireless Sensor Node | Home Security Motion Detector |
|
Use Scenario: IP67-rated vibration/temperature node powered by two AA alkaline cells, transmitting via Sub-GHz mesh every 5 minutes. IC Role / Device Role / Timing Role: Provides 3.3 V to MCU/radio, 2.5 V to MEMS accelerometer, and uses VOA_SW to isolate RF PA during receive-only intervals. Use Value: 94% peak efficiency minimizes heat in sealed enclosure; short-circuit tolerance protects against ESD-induced rail faults in harsh environments. |
Use Scenario: Battery-operated PIR motion detector with 5-year shelf life, wake-on-motion, and Zigbee reporting. IC Role / Device Role / Timing Role: Supplies 3.3 V to MCU and PIR signal chain, and gates 3.0 V to IR LED array only during active detection cycles via VOA_SW. Use Value: Programmable VOB_EM2_V reduces supply to 1.8 V in deep sleep - cutting MCU leakage by >60%; UVLO holds reset until battery recovers from cold-start sag. |
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 battery charger; lacks lossless coulomb counter and EM2-optimized 300 nA quiescent current. | Targets rechargeable Li-ion systems with charging; not optimized for primary-cell longevity or ultra-low-EM2 leakage. | Select MAX77650 only if battery charging is required; EFP0103GM20-E is superior for primary-cell, long-life, low-leakage designs. |
| TPS65270 | Dual-buck + dual-LDO PMIC; no firmware-programmable switched output (VOA_SW), no coulomb counter, 25 µA typical quiescent current. | Suited for industrial embedded systems with AC/DC or USB input; not designed for battery voltage range flexibility or sub-µA sleep. | Choose TPS65270 for cost-sensitive, non-battery-critical applications; EFP0103GM20-E delivers 83× lower EM2 IQ and intelligent power gating. |
Compared with MAX77650 and TPS65270, the EFP0103GM20-E uniquely combines primary-cell voltage adaptability (0.8–5.5 V), firmware-controlled power gating (VOA_SW), lossless coulomb counting, and industry-leading 300 nA EM2 quiescent current - making it the optimal choice for decade-long, maintenance-free IoT endpoint deployments.
Availability
EFP0103GM20-E is available at Aetrix Electronics and suitable for IoT sensors and end devices, smart utility metering, and wearable health monitors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for EFP0103GM20-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 and energy-efficient mixed-signal ICs for IoT, infrastructure, and industrial markets.
The EFP01 family was engineered specifically for battery-powered EFM32/EFR32 microcontroller ecosystems, delivering ultra-low-quiescent-power multi-rail regulation, intelligent energy-mode control, and embedded battery metrology - all in a compact QFN20 package.
FAQ
What battery chemistries does the EFP0103GM20-E support?
The EFP0103GM20-E supports single alkaline (Zn/MnO₂), zinc-carbon, lithium iron-disulfide (Li/FeS₂), lithium manganese dioxide (Li/MnO₂), lithium thionyl chloride (Li/SOCl₂), lithium-ion, lithium polymer, lithium iron phosphate (LiFePO₄), NiMH, and NiCd cells - plus USB input up to 5.5 V. Its 1.8–5.5 V input range is optimized for these chemistries' nominal and end-of-life voltages.
How does the "Wired Buck with LDO C" configuration work in the EFP0103GM20-E?
In the EFP0103GM20-E, DCDC A operates exclusively in wired-buck mode, and LDO C is hardwired in parallel with the VOA output. When input voltage (VDDB) approaches VOA, the LDO C automatically takes over regulation - eliminating discontinuity and ripple spikes without firmware intervention. This dual-path design ensures smooth, efficient operation across the full battery discharge curve.
Can the EFP0103GM20-E be used without an external inductor?
No. The EFP0103GM20-E requires external inductors for both DCDC A (LA) and DCDC B (LB). Its "Wired Buck with LDO C" configuration still relies on LA for buck conversion; LDO C only supplements regulation near VDDB–VOA crossover. Omitting LA would disable VOA output entirely.
What is the function of the VOA_SW pin on the EFP0103GM20-E?
The VOA_SW pin on the EFP0103GM20-E is a firmware-controlled switch that gates the VOA output rail. When asserted via I²C register VOA_SW_STAT, it connects VOA to external circuitry (e.g., RF modules, sensors); when deasserted, it isolates those loads - enabling true zero-current shutdown in EM2/EM4 and reducing system standby current to sub-microamp levels.
Does the EFP0103GM20-E include a coulomb counter, and how is it implemented?
Yes, the EFP0103GM20-E includes 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 path and accumulates charge in 24-bit registers (CCA_MSBY/CCA_LSBY). This enables accurate battery state-of-charge tracking and lifetime prediction in long-duration deployments.
EFP0103GM20-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:
- -
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (3x3)
EFP0103GM20-E FAQ
1.How can I place an order for EFP0103GM20-E through Aetrix?
Please submit a Request for Quotation (RFQ) for EFP0103GM20-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 EFP0103GM20-E reliable?
The price and inventory of EFP0103GM20-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFP0103GM20-E is usually 5 days.
3.What payment methods are accepted for EFP0103GM20-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFP0103GM20-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFP0103GM20-E?
EFP0103GM20-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFP0103GM20-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 EFP0103GM20-E?
For technical support, including EFP0103GM20-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFP0103GM20-E requirements.
6.How does Aetrix verify that EFP0103GM20-E is sourced from the original manufacturer or authorized distributors?
All EFP0103GM20-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 EFP0103GM20-E meets industry standards.
7.What is the process for return or replacement of EFP0103GM20-E?
All EFP0103GM20-E units undergo pre-shipment inspection (PSI). If there is an issue with EFP0103GM20-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 EFP0103GM20-E part is unused and in its original packaging.
Return procedure for EFP0103GM20-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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