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Silicon Labs EFP0103GM20-ER
- Part No.:
- EFP0103GM20-ER
- Manufacturer:
- Silicon Labs
- Category:
- Power Management - Specialized
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EFP0103GM20-ER.pdf
- Description:
- EFP0103 WIRED BUCK WITH LDO PMIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
EFP0103GM20-ER from Silicon Labs is a highly integrated, ultra-low-power PMIC designed for battery-powered EFM32/EFR32 systems. It delivers four regulated outputs - including a configurable buck DC-DC (VOA), a 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-ER datasheet, EFP0103GM20-ER pinout, EFP0103GM20-ER application, or EFP0103GM20-ER equivalent, this device is selected for energy-constrained IoT sensors, metering endpoints, and wearable health monitors requiring precise Coulomb counting, multi-rail sequencing, and dynamic power-state coordination via I²C.
Technical Context
The EFP0103GM20-ER implements a "Wired Buck with LDO C" configuration: DCDC A operates exclusively in wired-buck mode (not buck/boost), while LDO C is internally paired with VOA to improve regulation near input-output voltage crossover. Its Coulomb counter performs lossless charge measurement without a sense resistor, and its I²C interface supports Direct Mode for sub-microsecond energy-mode transitions.
EM2 quiescent current is precisely 300 nA when one output is active (+125 nA per additional enabled output), and under-voltage lockout holds the device in reset below 1.2 V on VDDB. The device integrates over-temperature monitoring, short-circuit tolerant outputs, and programmable inrush current control - all within a QFN20 3×3 mm package with exposed thermal pad.
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 primary/rechargeable sources without external biasing. |
| VOA Output Voltage | 1.7 V to 5.2 V - digitally programmable via VOA_V register (step = 30.6 mV); fixed at 1.860 V at startup. |
| VOB Output Voltage | 0.8 V to 3.3 V - factory-configured to 1.858 V at startup; supports wide-core logic and RF subsystems. |
| Quiescent Current (EM2) | 300 nA (1 output enabled) - enables multi-year battery life in always-on sensor nodes with periodic wake-up. |
| Peak Efficiency | 94% - achieved in DCDC A buck operation, reducing thermal load and extending runtime in compact enclosures. |
| Coulomb Counting | Lossless, no external sense resistor - provides accurate battery charge/discharge tracking for state-of-charge estimation. |
| Package | QFN20 3×3 mm, 0.5 mm pitch, exposed thermal pad - compatible with standard reflow profiles and high-density PCB layouts. |
Pinout & Package
Package: QFN20 (3 mm × 3 mm, 0.5 mm pitch, exposed thermal pad per JEDEC MO-220). Pinout validated from Silicon Labs EFP01 datasheet Rev. 1.3, Section 8.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog supply input | Primary analog rail for ADC, temp sensor, and internal references; must be decoupled with 1 µF ceramic capacitor. |
| VDDB | Power input / battery sense | Main input supply (1.8–5.5 V); also used for battery voltage monitoring and Coulomb counter reference. |
| VOA | Main regulated output (buck) | Configurable 1.7–5.2 V output; supports wired-buck only in EFP0103GM20-ER; pairs with VOC for improved light-load regulation. |
| VOA_SW | Firmware-controlled switch | Enables full power-down of external high-leakage circuitry (e.g., sensors, radios) during EM2/EM4 sleep states. |
| VOB | Secondary regulated output (buck + LDO) | 0.8–3.3 V output; factory-set to 1.858 V; includes dedicated internal LDO in parallel with DCDC B for low-noise core supply. |
| VOC | Tertiary LDO output | 1.7–3.3 V LDO; not independently configurable in EFP0103GM20-ER - hardwired to support VOA in buck-with-LDO-C mode. |
| I2C_SDA / SCL | I²C bidirectional data/clock | Fully configurable I²C interface (up to 1 MHz); supports Direct Mode for fast energy-mode transitions and IRQ-driven host wake-up. |
| IRQ | Interrupt request output | Open-drain active-low signal notifying host MCU of events: UVLO, over-temp, Coulomb threshold, or register-access completion. |
| GND | Ground reference | Common analog/digital ground; requires low-impedance connection to thermal pad for optimal thermal performance. |
| NC | No-connect | Pins 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 - reserved; must be left unconnected per datasheet Table 8.1. |
Key Features
| Feature | Design Value |
|---|---|
| Wired Buck with LDO C Configuration | DCDC A operates in fixed buck mode with VOC LDO actively paralleled to reduce output impedance and improve regulation near VDDB ≈ VOA. |
| Firmware-Programmable VOA_SW | Enables zero-static-current shutdown of external peripherals (e.g., BLE radio, environmental sensors) during EM2/EM4, eliminating leakage paths. |
| Lossless Coulomb Counter | Measures total charge delivered to load without sense resistor - preserves board space, avoids power loss, and eliminates resistor tolerance error. |
| Ultra-Low EM2 Quiescent Current | 300 nA with one output enabled ensures >10-year battery life in sub-1-µA average-current applications like utility metering endpoints. |
| Integrated Safety Functions | Includes UVLO (1.2 V threshold), over-temperature IRQ assertion, short-circuit tolerant outputs, and programmable inrush current limiting. |
Applications
| Smart Utility Metering | Low-Power IoT Sensor Node |
|---|---|
Use Scenario: Battery-powered gas/water meter with 10+ year lifetime, periodic RF transmission, and tamper detection. IC Role / Device Role / Timing Role: Primary system PMIC supplying MCU (EFM32), RF transceiver, and sensor interface rails while performing Coulomb-based battery health monitoring. Use Value: 300 nA EM2 quiescent current and lossless Coulomb counting enable accurate end-of-life prediction without sacrificing longevity. |
Use Scenario: Sub-GHz environmental sensor node deployed in remote locations, powered by dual alkaline cells, transmitting temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Multi-rail power manager delivering 1.8 V (MCU core), 3.3 V (radio), and 2.5 V (sensor interface), with VOA_SW disabling radio between transmissions. Use Value: Wired-buck-with-LDO-C configuration maintains tight regulation across 3.6 V → 1.8 V battery decay, minimizing brownouts during RF bursts. |
| Wearable Health Monitor | Home Security PIR Sensor |
Use Scenario: Optical heart-rate monitor using photodiode array and analog front-end, powered by coin-cell battery. IC Role / Device Role / Timing Role: Supplies low-noise 1.8 V for analog signal chain (via VOB LDO), 3.0 V for MCU (VOA), and enables/disables LED drivers via VOA_SW. Use Value: Parallel LDO B on VOB reduces PSRR-sensitive noise; VOA_SW eliminates 500 nA LED driver leakage during sleep - critical for microamp-level budgeting. |
Use Scenario: Battery-operated passive infrared motion detector with wake-on-event, local alarm, and optional Zigbee reporting. IC Role / Device Role / Timing Role: Powers MCU in EM4 (deep sleep), wakes via IRQ on PIR trigger, then rapidly ramps VOA/VOB to full rail for processing and communication. Use Value: Direct Mode I²C and sub-µs IRQ response allow <100 µs wake latency; EM2/EM4 support enables <1 µA average system current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFP0101GM20-E | Wired Buck only (no LDO C pairing); VOB range 0.8–3.3 V; same QFN20 package and pinout. | Lacks VOC-LDO parallel support with VOA - less effective regulation near VDDB/VOA crossover; suitable where cost sensitivity outweighs light-load stability needs. | Select EFP0101GM20-E if VOA load is purely digital and does not require analog-grade ripple suppression. |
| EFP0106GM20-E | Buck/Boost capable (BB_MODE = 1); supports wider input range (1.8–5.5 V) with automatic mode transition; same VOB/VOC specs. | Enables single-cell Li-ion (2.7–4.35 V) and USB input without external pre-regulation; adds NTM transitional mode but increases complexity and reduces peak efficiency by ~5–8% vs buck-only. | Choose EFP0106GM20-E only when input voltage may dip below VOA (e.g., aging LiFePO₄) and buck/boost flexibility justifies trade-offs in efficiency and firmware overhead. |
Compared with EFP0101GM20-E, EFP0103GM20-ER improves light-load regulation via VOC-LDO parallelization; compared with EFP0106GM20-E, it trades buck/boost versatility for higher efficiency, simpler configuration, and lower EM2 current - making it optimal for stable-input, long-life sensor applications.
Availability
EFP0103GM20-ER is available at Aetrix Electronics and suitable for IoT sensors and end devices, smart metering endpoints, and wearable health monitors requiring stable component supply, extended battery life, and precise energy accounting.
Supply support for EFP0103GM20-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 engineered specifically for ultra-low-power, battery-operated EFM32/EFR32-based systems - prioritizing nanowatt EM2 operation, integrated Coulomb counting, and firmware-configurable multi-rail sequencing over general-purpose PMIC features.
FAQ
What is the default VOB output voltage at startup for EFP0103GM20-ER?
The EFP0103GM20-ER has a factory-programmed VOB startup voltage of 1.858 V, supporting common MCU core voltages and RF subsystems. This value is stored in OTP and can be reconfigured via I²C register writes to VOB_EM0_V and VOB_EM2_V during runtime, subject to the 0.8–3.3 V operational range.
Does EFP0103GM20-ER support buck/boost operation?
No - EFP0103GM20-ER is configured as "Wired Buck with LDO C" per its OPN-specific definition. DCDC A operates exclusively in wired-buck mode (BB_CTRL3.BB_MODE = 5); buck/boost functionality requires EFP0106GM20-E or EFP0107GM20-E. Attempting to force buck/boost mode on EFP0103GM20-ER will result in undefined behavior.
How does the VOA_SW pin function in EFP0103GM20-ER?
In EFP0103GM20-ER, the VOA_SW pin is a firmware-controlled switch tied directly to the VOA output. When asserted via the VOA_SW_STAT register, it connects VOA to external circuitry; when de-asserted, it disconnects - enabling true zero-leakage shutdown of high-impedance loads (e.g., op-amps, sensor bias networks) during EM2/EM4 sleep states.
What is the maximum output current capability of the VOA rail in EFP0103GM20-ER?
The VOA rail in EFP0103GM20-ER supports up to 500 mA typical output current in wired-buck mode, derived from the 0.5 × IPK_BASE formula where IPK_BASE = 0.090 A + (0.009 A × BB_IPK). With default BB_IPK = 0x0F, IPK_BASE = 225 mA, yielding ~112 mA max continuous output - actual capability depends on inductor selection, thermal design, and input/output voltage differential.
Is the Coulomb counter in EFP0103GM20-ER compatible with rechargeable Li-ion batteries?
Yes - the lossless Coulomb counter in EFP0103GM20-ER measures net charge flow into/out of the load regardless of battery chemistry. It is explicitly validated for single-cell Li-ion (2.7–4.35 V), LiFePO₄ (2.5–3.65 V), and primary cells. No external sense resistor or calibration is required, and accuracy is maintained across temperature and aging.
EFP0103GM20-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)
EFP0103GM20-ER FAQ
1.How can I place an order for EFP0103GM20-ER through Aetrix?
Please submit a Request for Quotation (RFQ) for EFP0103GM20-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 EFP0103GM20-ER reliable?
The price and inventory of EFP0103GM20-ER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFP0103GM20-ER is usually 5 days.
3.What payment methods are accepted for EFP0103GM20-ER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFP0103GM20-ER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFP0103GM20-ER?
EFP0103GM20-ER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFP0103GM20-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 EFP0103GM20-ER?
For technical support, including EFP0103GM20-ER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFP0103GM20-ER requirements.
6.How does Aetrix verify that EFP0103GM20-ER is sourced from the original manufacturer or authorized distributors?
All EFP0103GM20-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 EFP0103GM20-ER meets industry standards.
7.What is the process for return or replacement of EFP0103GM20-ER?
All EFP0103GM20-ER units undergo pre-shipment inspection (PSI). If there is an issue with EFP0103GM20-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 EFP0103GM20-ER part is unused and in its original packaging.
Return procedure for EFP0103GM20-ER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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