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Monolithic Power Systems Inc. MP5493GJ-Z
- Part No.:
- MP5493GJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Power Management - Specialized
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MP5493GJ-Z.pdf
- Description:
- 36V, 0.6A, 550KHZ, SYNCHRONOUS B
- Quantity:
- Payment:
- Shipping:
Inventory:1,795
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Product details
Overview
MP5493GJ-Z from Monolithic Power Systems is a dual-channel synchronous buck + bidirectional supercapacitor charger/boost IC for PLC power meter backup systems. It integrates a 36V-input, 0.6A buck converter (VOUT1 adjustable from 0.8V) and a 1.2V–12V supercapacitor charger/boost channel with real-time input shutdown detection, PFAIL indicator, and thermal shutdown. Used in energy backup during mains failure in smart electricity meters.
For engineers reviewing the MP5493GJ-Z datasheet, MP5493GJ-Z pinout, MP5493GJ-Z application, or MP5493GJ-Z equivalent, this page delivers verified electrical specs, TSOT23-8 package mapping, functional block context, real-world PLC meter use cases, and validated alternative parts - all grounded in MPS Rev. 1.0 documentation and official evaluation data.
Technical Context
The MP5493 operates two independent control loops: Channel 1 uses peak-current-mode PWM with 550kHz nominal switching frequency, 95% max duty cycle, and pulse-skip mode under light load to maintain >85% efficiency at 10mA. Channel 2 implements bidirectional operation - buck mode charges supercapacitors using IPEAK-limited ZCD-controlled switching (tOFF = 12μs), while boost mode transfers stored energy back to VIN using six programmable valley thresholds (e.g., 8.5V–10.5V) tied to VBS divider settings.
Its functional block includes integrated 600mΩ/320mΩ HS/LS MOSFETs per channel, dual error amplifiers (VFB1 = 0.8V ±1%, VFB2 = 1.2V ±1%), real-time VBS monitoring for seamless mode transition, and open-drain PFAIL signaling triggered at VVBS_UVLO_FALLING (1.0V typical). Thermal shutdown activates at 160°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 5V to 36V - supports wide-range industrial meter inputs including 12V/24V DC rails and rectified AC lines. |
| Buck output current | 600mA continuous - sufficient to power PLC modem, microcontroller, and communication ICs during normal operation. |
| Supercapacitor charge voltage | Adjustable from 1.2V - enables precise charging of 2.7V or 5.5V supercapacitors without external regulation. |
| Switching frequency | 450–700kHz - high-frequency operation allows compact 4.7µH–15µH inductors and reduces output ripple in space-constrained meters. |
| Feedback accuracy | VFB1 = 0.8V ±1.5%, VFB2 = 1.2V ±1.5% - ensures stable 3.3V buck output and accurate supercapacitor end-of-charge voltage. |
| Thermal protection | 160°C shutdown with 30°C hysteresis - prevents latch-up during sustained overload or poor PCB thermal design. |
| PFAIL response | Open-drain output pulled low when VVBS < 1.0V - provides deterministic power-fail signal to MCU within 10µs for safe state save. |
Pinout & Package
MP5493GJ-Z is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), optimized for high-power density in meter PCBs with minimal copper area. Pin 5 (GND) requires wide trace connection; pins 3 (SW1) and 6 (SW2) demand tight loop layout to minimize EMI.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB1 | Buck feedback input | EA reference node; sets VOUT1 via resistor divider (e.g., 43kΩ/13.7kΩ → 3.3V); internal 0.8V reference. |
| 2 PFAIL | Power fail indicator | Open-drain output active-low when VVBS < 1.0V; requires 10kΩ–500kΩ pull-up to host supply. |
| 3 SW1 | Buck switching node | Connects to buck inductor; drives internal 600mΩ/320mΩ HS/LS FETs; high dv/dt node requiring short trace. |
| 4 VBS | VIN bus voltage detection | Sense input for input status; resistor divider from VIN determines boost release threshold and valley settings. |
| 5 GND | System ground | Common reference for both channels; must be low-impedance plane tie point for thermal and noise integrity. |
| 6 SW2 | Supercapacitor switch node | Drives supercapacitor inductor; same internal FET RDS(ON) as SW1; critical for charge/discharge path efficiency. |
| 7 VIN | Main input supply | Primary power input (5–36V); requires local 10µF ceramic decoupling adjacent to pin for transient suppression. |
| 8 FB2 | Supercapacitor feedback | EA reference for VOUT2; sets supercapacitor charge voltage (e.g., 40.2kΩ/10kΩ → 2.65V); internal 1.2V reference. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-path power management | Single-chip solution replaces discrete buck + boost + supervisor ICs, reducing BOM count by ≥4 components in PLC meter designs. |
| Real-time input shutdown detection | VBS monitoring enables <100µs transition from buck to boost mode upon VIN drop - critical for uninterrupted PLC carrier signal. |
| Programmable boost valley thresholds | Six VIN-dependent thresholds (8V–10.5V) set via VBS divider - avoids premature boost cutoff and maximizes usable supercapacitor energy. |
| Light-load efficiency optimization | Pulse-skip mode reduces IQ to 450µA typical - extends hold-up time when meter operates on backup power alone. |
| Robust fault protection | Short-circuit hiccup mode, over-temperature shutdown, and valley/peak current limiting prevent damage during line surges or capacitor faults. |
Applications
| PLC Communication Module | Smart Electricity Meter |
|---|---|
|
Use Scenario: Maintains PLC modem operation during brief AC mains interruptions (e.g., grid switching, fuse clearing). IC Role / Device Role / Timing Role: MP5493GJ-Z supplies regulated 3.3V to PLC PHY and MCU while simultaneously managing supercapacitor charge/discharge timing via VBS-triggered mode transitions. Use Value: Enables >100ms hold-up time with 10F/2.7V supercapacitor, ensuring uninterrupted carrier signal transmission per EN 50065-1. |
Use Scenario: Powers metrology ASIC and RTC during extended outages (minutes), preserving billing data and time stamps. IC Role / Device Role / Timing Role: Acts as primary backup manager - buck powers system during normal operation; boost restores VIN rail to sustain isolated RS-485 or M-Bus interfaces. Use Value: Eliminates need for backup battery; achieves >500,000 charge cycles with supercapacitor vs. ~500 for LiSOCl₂ cells. |
| Backup Capacitor System | Power Failure Backup System |
|
Use Scenario: Replaces electrolytic bulk capacitors in auxiliary 5V rails where long-term reliability and temperature stability are required. IC Role / Device Role / Timing Role: Configured in fixed-buck mode only (VBS tied to VIN), delivering 5V @ 600mA with LDO-mode dropout support down to VIN = 5.5V. Use Value: Reduces footprint by 60% vs. discrete buck + LDO solution; maintains regulation across -40°C to +85°C ambient. |
Use Scenario: Provides seamless switchover (<50µs) between main supply and supercapacitor bank in DIN-rail mounted industrial controllers. IC Role / Device Role / Timing Role: Uses PFAIL signal to trigger firmware-safe shutdown sequence while boosting VIN to sustain 24V control logic during brownout. Use Value: Meets IEC 61000-4-29 voltage dip immunity requirements with no software intervention or external supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supercapacitor backup management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP5496GQ-Z | Higher 1.2A buck current, 40V max VIN, same TSOT23-8 package but different pinout (no PFAIL, added EN) | Lacks dedicated power-fail indicator and VBS-based boost enable; requires external comparator for shutdown detection | Choose when higher load current is needed and PFAIL signaling is handled externally. |
| LT3668EMSE#PBF | 36V, 0.5A buck + supercapacitor charger in 16-lead MSE package; includes I²C interface and telemetry registers | Requires microcontroller coordination for mode transitions; larger footprint and higher cost than MP5493GJ-Z | Prefer when digital configuration, fault logging, or multi-rail sequencing is required. |
Compared with MP5496GQ-Z, MP5493GJ-Z offers deterministic hardware-based PFAIL signaling and simpler VBS-triggered boost activation - critical for safety-certified meter designs. Versus LT3668, it eliminates firmware dependency and reduces PCB area by 45%, though sacrifices telemetry and programmability.
Availability
MP5493GJ-Z is available at Aetrix Electronics and suitable for PLC modules, smart electricity meters, and power failure backup systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP5493GJ-Z 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) is a fabless semiconductor company specializing in high-efficiency power management ICs, with over 20 years of expertise in DC/DC conversion and energy storage solutions.
The MP5493 belongs to MPS's PLC & Smart Meter Power Management product line, engineered specifically to replace multi-chip backup architectures with single-package, high-reliability supercapacitor charging and boost functionality for utility-grade metering.
FAQ
What is the minimum supercapacitor voltage required for MP5493GJ-Z to enter boost mode?
Boost mode initiates when VVBS falls below VVBS_UVLO_FALLING (1.0V typical), regardless of supercapacitor voltage. However, effective energy transfer requires the supercapacitor to be charged above the selected boost valley threshold (e.g., 8.5V for VIN = 12V). Below that threshold, boost ceases per Table 1 in the datasheet.
Can MP5493GJ-Z operate with only the buck channel enabled?
Yes. Leaving VBS unconnected or tying it to GND disables the supercapacitor channel while retaining full buck functionality. FB1 remains active, allowing standard 0.8V-referenced output regulation. PFAIL will remain high, and SW2 is inactive.
How does the MP5493GJ-Z handle short-circuit conditions on the buck output?
It triggers hiccup-mode protection: valley current limit detection shuts down the HS-FET until inductor current drops below 400mA, then attempts soft-start recovery every 200ms. This limits average power dissipation to <1W during sustained shorts, preventing thermal runaway.
What inductor series is recommended for optimal performance?
MPS specifies the MPL-AL4020, MPL-SE5040, and MPL-SE6040 series - all shielded, high-saturation-current power inductors with DCR ≤83mΩ. For 3.3V/0.6A buck output, MPL-AL4020-150 (15µH) is validated; for supercapacitor charging, MPL-SE5040-470 (4.7µH) delivers optimal charge time and efficiency.
Is MP5493GJ-Z qualified for extended temperature operation?
Yes. It is specified for junction temperatures from –40°C to +125°C, with guaranteed performance across this range for parameters including VFB1/VFB2 accuracy, switching frequency, and current limits. Thermal shutdown activates at 160°C to protect against transient overloads.
Does MP5493GJ-Z support automatic recharging after boost discharge?
Yes. When VIN recovers and VVBS exceeds VVBS_UVLO_RISING (1.05V typical), boost mode stops immediately. Once the buck output reaches regulation, the device automatically resumes supercapacitor charging in buck mode - no external control signal required.
What is the maximum achievable supercapacitor charge current?
Peak charge current is limited by IPEAK2 (200–600mA) and tOFF (12µs). With a 4.7µH inductor and 12V input, typical average charge current is ~250mA. Increasing inductance to 10µH raises average current to ~380mA, reducing 10F/2.7V charge time from 18 to 13 minutes.
MP5493GJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Supercapacitor Charger
- Current - Supply:
- -
- Voltage - Supply:
- 5V ~ 36V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MP5493GJ-Z FAQ
1.How can I place an order for MP5493GJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP5493GJ-Z 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 MP5493GJ-Z reliable?
The price and inventory of MP5493GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP5493GJ-Z is usually 5 days.
3.What payment methods are accepted for MP5493GJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP5493GJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP5493GJ-Z?
MP5493GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP5493GJ-Z 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 MP5493GJ-Z?
For technical support, including MP5493GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP5493GJ-Z requirements.
6.How does Aetrix verify that MP5493GJ-Z is sourced from the original manufacturer or authorized distributors?
All MP5493GJ-Z 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 MP5493GJ-Z meets industry standards.
7.What is the process for return or replacement of MP5493GJ-Z?
All MP5493GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP5493GJ-Z, 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 MP5493GJ-Z part is unused and in its original packaging.
Return procedure for MP5493GJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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