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Monolithic Power Systems Inc. MP111DS-LF-P
- Part No.:
- MP111DS-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Specialized ICs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Description:
- IC DYING GASP STOR/REL CTL 8SOIC
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
MP111DS-LF-P - Dying-Gasp Energy Storage Controller
Monolithic Power Systems MP111DS-LF-P charges an external storage capacitor and releases its energy to the input rail during a supply interruption. This lead-free ordering option uses an 8-lead SOIC package.
Technical values are from the MPS MP111 datasheet, Rev. 1.0; MPS lists the exact MP111DS-LF-P ordering code on its product page.
Overview
During normal operation, MP111 charges and maintains an external storage capacitor. When the monitored input drops below a resistor-programmed release level, the controller transfers stored energy back to the input capacitor and helps hold the input near that release level for a limited time. The open-drain GASP output signals the dying-gasp condition to the system controller.
Key Advantages
Charges and refreshes a dedicated capacitor during normal input power.
External feedback dividers set storage and release voltages for the application.
An internal current limit controls pre-charge of the storage capacitor.
Open-drain GASP output can notify host logic to save state or send a final message.
Feature Summary
Designed for a 4.5 V to 18 V operating input.
Energy is moved from STRG to VIN when the programmed input-release threshold is crossed.
Datasheet describes 250 mA charging current limit and 2.5 A release-current limit.
BST is coupled to the DC/DC converter switch node as specified by the manufacturer.
Package & Footprint
MPS identifies MP111DS as SOIC-8. The product's registered package is the 0.154-inch (3.90 mm) wide 8-SOIC variant. The LF suffix denotes lead-free packaging; MPS lists the P suffix as a reel-size option on the product page.
- Confirm SOIC-8 land pattern and pin-1 orientation with the MPS package drawing.
- Keep VIN decoupling and STRG current loops short.
- Follow the BST and VMAX external-component requirements.
The normalized 8-SOIC registry entry and its local JPG have been checked. The illustration is not a dimensional drawing.
Pin Functions
MPS MP111 datasheet SOIC-8 top-view pin assignment:
Bootstrap connection to the DC/DC converter switch node through the specified series components.
4.5 V to 18 V input supply; provide local decoupling.
Feedback input that sets release voltage.
System ground and layout reference.
Feedback input that sets storage voltage.
Open-drain dying-gasp status output.
External energy-storage capacitor connection.
Internal supply; requires ceramic decoupling per datasheet.
Use the manufacturer's package top view for assembly orientation.
Key Specifications
| Manufacturer | Monolithic Power Systems |
|---|---|
| Ordering code | MP111DS-LF-P |
| Function | Dying-gasp storage and release control |
| Input operating range | 4.5 to 18 V |
| Recommended storage voltage | VIN to 2 × VIN − 0.8 V; 32 V maximum |
| Operating junction temperature | −40 to +125 °C |
| SOIC-8 thermal resistance θJA | 90 °C/W, JESD51-7 four-layer board |
| Feedback voltage | 0.95 V minimum, 1.00 V typical, 1.05 V maximum |
| VIN UVLO rising threshold | 3.0 V minimum, 3.5 V typical, 4.0 V maximum |
| VIN UVLO hysteresis | 350 mV typical |
| GASP delay | 2 µs typical |
| Storage pre-charge limit | 0.25 A typical at VIN = 12 V while charging from 0 to VIN |
| Storage-to-VIN release limit | 2.5 A typical |
| Package | SOIC-8, lead-free reel-size P ordering option |
Electrical table conditions are VIN = 12 V and TA = 25 °C unless otherwise noted. Typical values are not guaranteed minimum or maximum limits.
Replacement Considerations
MPS lists MP111DS-LF-Z as the same device with a different reel-size suffix. Confirm packaging quantity and manufacturing documentation for the purchasing workflow. For a functional redesign, compare any proposed energy-storage controller against the complete MP111 power-path behavior, BST connection, VIN and STRG voltage limits, FB setpoints, GASP polarity, current limits, thermal behavior, and SOIC footprint. No unverified cross-part or internal product link is asserted.
Manufacturer Information
Monolithic Power Systems publishes the MP111 datasheet and lists MP111DS-LF-P among its orderable part numbers. The manufacturer currently marks the MP111 family as not recommended for new designs; consult MPS for lifecycle and design-support decisions.
Applications
Reserve short-duration energy for a controlled response to input power loss.
Support a final communication or state update during a supply interruption.
Hold the input rail temporarily while firmware performs shutdown actions.
Provide a dying-gasp indication and energy reserve in network infrastructure.
Quality & Authenticity
Check the full MP111DS-LF-P code, manufacturer markings, lot traceability, packaging label, and lead-free documentation. Confirm the component against the board's approved bill of materials and the MPS package drawing before assembly.
FAQ
What does MP111 do when input power falls?
It releases energy from an external storage capacitor toward VIN after the programmed release threshold is crossed.
Is hold-up duration fixed by the IC?
No. It depends on capacitor energy, load, programmed thresholds, converter behavior, and loss mechanisms.
Is MP111DS-LF-Z an electrical redesign?
MPS states P and Z identify reel size for the same part; confirm the full procurement and packaging requirements.
Engineering Notice
The manufacturer marks MP111 as not recommended for new designs. The BST pin requires the specified connection to an active DC/DC switch node for storage boosting. Verify STRG voltage, VIN regulation, energy budget, thermal limits, and GASP timing across the real load and power-failure profile. Absolute maximum ratings are not normal operating targets.
MP111DS-LF-P Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- -
- Type:
- Dying Gasp Storage and Release Controller
- Applications:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Grade:
- -
- Qualification:
- -
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