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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Current Regulation/Management

Monolithic Power Systems Inc. MP5099GDT-P

Name: MP5099GDT-P
Brand: Monolithic Power Systems Inc.
SKU: MP5099GDT-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP5099GDT-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Current Regulation/Management

Package:: 10-WFQFN

Datasheet:: MP5099GDT-P.pdf

Description:: DUAL-CHANNEL CURRENT LIMIT SWITC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP5099GDT-P from Monolithic Power Systems is a dual-channel e-fuse IC providing integrated over-current, over-voltage, reverse-current, and thermal protection for 12V and 5V power rails. It features fixed 4A/2.95A (CH1) and 3A/2.2A (CH2) trip/hold current limits, 40mΩ R_DS(ON), 150μA/130μA quiescent current per channel, and real-time current monitoring via IMON/IMON_SEL pins. Used in SSDs and hot-swap backplanes to prevent inrush damage and sustain stable rail delivery.

For engineers reviewing the MP5099GDT-P datasheet, MP5099GDT-P pinout, MP5099GDT-P application, or MP5099GDT-P equivalent, this page delivers verified electrical parameters, validated dual-rail protection behavior, soft-start configuration guidance, OVP response timing (2μs), and current monitor gain calibration (28μA/A typical) - all critical for high-reliability 12V/5V power domain design.

Technical Context

The MP5099GDT-P integrates two independent high-side current-limit switches with separate UVLO (8.5V/4.0V), OVP (15V/5.7V), and hiccup-mode OCP (2ms on / 200ms off). Each channel employs fast-turn-off circuitry (<1μs short-circuit response) and reverse-current blocking on the 5V rail only.

Its current monitor uses a selectable single-output architecture: IMON_SEL high monitors CH1 (28μA/A gain), low/floating monitors CH2 (29μA/A gain), with offset-compensated voltage output referenced to a 24.9kΩ resistor yielding 2.15V/1.88V full-scale at rated load.

Key Specifications

Parameter	Value and Actual Design Meaning
R_DS(ON)	40mΩ typical per channel at 25°C - enables <100mV conduction loss at 2.5A, minimizing thermal rise in compact layouts.
Current Limit	CH1: 4A trip / 2.95A hold; CH2: 3A trip / 2.2A hold - fixed thresholds eliminate external resistor tuning and ensure repeatable fault response.
OVP Threshold	CH1: 15V typical; CH2: 5.7V typical - clamps transients before downstream 12V/5V ICs exceed absolute maximum ratings.
Soft-Start Time	12ms typical with SS pin floating - controls VOUT slew rate to limit inrush dv/dt and avoid backplane droop during hot-insertion.
Quiescent Current	150μA (CH1) / 130μA (CH2) - enables always-on monitoring in low-power storage subsystems without battery drain penalty.
Current Monitor Gain	28μA/A (CH1) / 29μA/A (CH2) - converts load current to proportional IMON current; with 24.9kΩ, yields 2.15V/1.88V full-scale for ADC interfacing.
Short-Circuit Response	<1μs fast turn-off at 8A secondary limit - prevents catastrophic FET failure and limits peak fault energy during hard shorts.

Pinout & Package

TQFN-10 (2mm × 3mm) package with exposed thermal pad; RoHS-compliant, halogen-free, MSL Level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 VIN1	Channel 1 input supply	Accepts 10.8–13.2V; requires local 10μF ceramic decoupling; wide trace routing recommended for >4A capability.
2 SS1	Channel 1 soft-start control	Connects to CSS1 capacitor; 4.8μA internal current source sets t_SS; floating = 12ms default ramp time.
3 SS2	Channel 2 soft-start control	Same function as SS1 but for 5V rail; independent timing allows staggered power-up sequencing.
4 GND	System ground reference	Common return for all analog and power paths; must connect directly to thermal pad and low-impedance plane.
5 VIN2	Channel 2 input supply	Accepts 4.5–5.5V; includes reverse-current blocking; decoupled with 10μF ceramic near pin.
6 VOUT2	Channel 2 regulated output	Delivers clean 5V to load; monitored by IMON when IMON_SEL is low/floating.
7 IMON	Current monitor output	Sinks proportional current (28–29μA/A); requires external R_IMON to generate voltage for MCU ADC sampling.
8 IMON_SEL	Channel selection control	High = monitor CH1 I_OUT; low/floating = monitor CH2 I_OUT; no pull required due to internal bias.
9 EN	Global enable/disable	Active-low logic; internal 0.8MΩ pull-down; float or tie to GND for always-on operation.
10 VOUT1	Channel 1 regulated output	Delivers clean 12V to load; monitored by IMON when IMON_SEL is high; supports hot-swap insertion.

Key Features

Feature	Design Value
Dual-rail e-fuse integration	Single TQFN-10 replaces two discrete 12V/5V protection ICs - reduces BOM count, PCB area, and layout complexity.
Independent surge tolerance	CH1 withstands 24V/100ms; CH2 withstands 16V/100ms - eliminates need for external TVS diodes in industrial hot-swap applications.
Hiccup-mode OCP recovery	2ms on / 200ms off cycle - sustains protection during persistent faults while enabling automatic system recovery without manual reset.
Reverse-current blocking	Enabled only on 5V channel - prevents backfeed from powered peripherals into unpowered 5V domains, critical for USB/PCIe compliance.
Thermal shutdown latch-off	150°C junction threshold with non-latching restart - protects against sustained overload while allowing recovery after cooling.

Applications

Hard Disk Drives (HDDs)

Solid-State Drives (SSDs)

Use Scenario: Powering 12V spindle motor and 5V logic circuits during hot-plug insertion into enterprise storage enclosures.

IC Role / Device Role / Timing Role: Dual-channel e-fuse enforces controlled ramp-up of both rails, limiting inrush to prevent backplane voltage sag and data corruption.

Use Value: Prevents 12V rail collapse during spin-up and avoids 5V logic brownout - ensuring reliable firmware initialization and NAND controller handshake.

Use Scenario: Protecting PCIe NVMe SSDs from transient surges during live server blade replacement.

IC Role / Device Role / Timing Role: Provides simultaneous 12V auxiliary and 3.3V/5V core rail protection with sub-2μs OVP response and <1μs short-circuit cutoff.

Use Value: Eliminates need for discrete TVS + MOSFET + sense resistor stacks - reducing component count by ≥6 while maintaining PCIe Gen4 signal integrity.

Hot-Swap Backplanes

Industrial Control Modules

Use Scenario: Inserting modular I/O cards into powered 12V/5V midplane systems without disrupting active modules.

IC Role / Device Role / Timing Role: Acts as intelligent front-end switch with programmable soft-start (via CSS), preventing arc formation and contact bounce-induced glitches.

Use Value: Enables zero-downtime field upgrades by limiting inrush dv/dt to <5V/ms - meeting IEEE 1101.10 hot-swap compliance requirements.

Use Scenario: Securing 12V sensor power and 5V microcontroller supply in factory automation PLCs exposed to EMI-rich environments.

IC Role / Device Role / Timing Role: Delivers coordinated over-voltage (15V/5.7V), over-current (4A/3A), and thermal (150°C) shutdown across both rails.

Use Value: Sustains uptime by isolating faulted channels instead of full system reset - preserving ladder logic state and process continuity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-rail e-fuse applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS25982LMLR	Single-channel, 60V max input, 0.95mΩ R_DS(ON), no integrated current monitor	Requires two devices for dual-rail; lacks IMON/IMON_SEL multiplexing and reverse-current blocking on 5V rail	Select when ultra-low conduction loss at >10A is prioritized over integration and monitoring.
RTQ2132BGQW	Dual-channel, 20V max input, 35mΩ R_DS(ON), 2.5A/1.8A fixed current limits, no reverse-current protection	Lower voltage rating limits use to 12V-only systems; missing 5V-specific reverse-blocking and OVP headroom	Choose for cost-sensitive 12V-only applications where 5V rail protection is handled externally.

Compared with TPS25982LMLR and RTQ2132BGQW, MP5099GDT-P uniquely combines 12V/5V dual-rail support, reverse-current blocking on the 5V channel, integrated current monitoring with channel selection, and higher surge tolerance - making it optimal for space-constrained, multi-rail hot-swap systems requiring full diagnostic visibility.

Availability

MP5099GDT-P is available at Aetrix Electronics and suitable for Solid-State Drives (SSDs), Hard Disk Drives (HDDs), and Hot-Swap Backplanes requiring stable component supply, long-term lifecycle assurance, and production-ready qualification.

Supply support for MP5099GDT-P 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

Monolithic Power Systems (MPS) designs high-performance power management semiconductors with focus on efficiency, integration, and reliability for computing, storage, and industrial markets.

The MP5099 belongs to MPS's eFuse & Load Switch product line, engineered specifically for robust hot-swap and inrush current control in multi-rail storage and telecom infrastructure.

FAQ

What is the maximum continuous input voltage rating for each channel?

VIN1 supports 10.8V to 13.2V continuous operation with 24V/100ms surge tolerance; VIN2 supports 4.5V to 5.5V continuous operation with 16V/100ms surge tolerance. Exceeding these ranges risks permanent damage per Absolute Maximum Ratings table.

How does the IMON pin deliver accurate current measurement across temperature?

IMON provides current-proportional output (28–29μA/A) with specified offset (0.7–3.2μA) and gain drift; accuracy is maintained using a precision 24.9kΩ resistor and referencing the IMON voltage to GND - calibration is required at system level for ±2% full-scale error.

Can the MP5099GDT-P be used with only one channel enabled?

Yes - pulling EN high disables both channels, but tying EN low activates both. There is no per-channel enable; however, individual rail control is achieved by disconnecting VIN or grounding EN via MCU GPIO with open-drain logic.

What is the thermal performance limitation in a 2-layer PCB layout?

On a 2-layer JEDEC board (EV5099-D-00A), θ_JA is 40°C/W. At 4A load and 25°C ambient, junction temperature rises ~160°C - exceeding 125°C max operating range. Use internal copper pours, thermal vias to inner layers, and minimize trace resistance to stay within spec.

Does the device support adjustable current limit thresholds?

No - trip and hold currents are internally fixed: 4A/2.95A for CH1 and 3A/2.2A for CH2. No external resistor or pin-strapping modifies these values; design margin must be verified against worst-case load profiles.

How does reverse-current protection operate on the 5V channel?

When VOUT2 exceeds VIN2 (e.g., backfeed from a powered peripheral), the CH2 FET blocks reverse conduction. This occurs only on CH2; CH1 has no reverse-blocking function. Protection triggers at ~100mV forward drop across the body diode.

What is the minimum recommended CSS capacitance for stable soft-start?

A 100nF capacitor on SS1/SS2 yields ~5ms soft-start time. Lower values risk excessive inrush; values below 10nF may cause instability. The datasheet recommends ≥100nF for predictable 12V/5V rail sequencing under full load.

MP5099GDT-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 10-WFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Current Monitor

Sensing Method:: High-Side

Accuracy:: ±10%

Voltage - Input:: 4.5V ~ 5.5V, 10.8V ~ 13.2V

Current - Output:: 3A, 4A

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-TQFN (2x3)

MP5099GDT-P FAQ

1.How can I place an order for MP5099GDT-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP5099GDT-P 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 MP5099GDT-P reliable?

The price and inventory of MP5099GDT-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP5099GDT-P is usually 5 days.

3.What payment methods are accepted for MP5099GDT-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP5099GDT-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP5099GDT-P?

MP5099GDT-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP5099GDT-P 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 MP5099GDT-P?

For technical support, including MP5099GDT-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP5099GDT-P requirements.

6.How does Aetrix verify that MP5099GDT-P is sourced from the original manufacturer or authorized distributors?

All MP5099GDT-P 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 MP5099GDT-P meets industry standards.

7.What is the process for return or replacement of MP5099GDT-P?

All MP5099GDT-P units undergo pre-shipment inspection (PSI). If there is an issue with MP5099GDT-P, 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 MP5099GDT-P part is unused and in its original packaging.

Return procedure for MP5099GDT-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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