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Texas Instruments LMR10515XMFE/NOPB
- Part No.:
- LMR10515XMFE/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMR10515XMFE/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.5A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,750
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Product details
Overview
LMR10515XMFE/NOPB from Texas Instruments is a monolithic 1.6-MHz, 1.5-A synchronous step-down DC/DC regulator in a 5-pin SOT-23 package, featuring an internal 130-mΩ PMOS switch, 0.6-V feedback reference, and current-mode PWM control. It operates from 3 V to 5.5 V input and delivers regulated output voltages from 0.6 V to 4.5 V, optimized for space-constrained point-of-load conversion in battery-powered instrumentation.
For engineers reviewing the LMR10515XMFE/NOPB datasheet, LMR10515XMFE/NOPB pinout, LMR10515XMFE/NOPB application, or LMR10515XMFE/NOPB equivalent, key selection considerations include its 1.6-MHz fixed switching frequency, ultra-low 30-nA shutdown quiescent current, internal soft-start, thermal shutdown, and compatibility with ceramic output capacitors for minimal PCB footprint.
Technical Context
The LMR10515XMFE/NOPB implements current-mode PWM control with internal compensation and a fixed 1.6-MHz oscillator, enabling stable regulation with only five external components. Its 30-ns minimum on-time supports low-duty-cycle operation down to 0.6-V output from 3-V input.
It integrates undervoltage lockout (2.73-V rising threshold), cycle-by-cycle current limiting (1.8-A min / 2.5-A typ), output overvoltage protection (15% above 0.6-V reference), and thermal shutdown at 165°C - all within a thermally enhanced SOT-23 package with 118°C/W junction-to-ambient thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 5.5 V - supports direct regulation from common 3.3-V and 5-V system rails without pre-regulation. |
| Output Current | Up to 1.5 A - sufficient for powering microcontrollers, sensors, and RF modules in portable equipment. |
| Switching Frequency | 1.6 MHz - enables use of sub-2.2-µH inductors and compact 22-µF ceramic output capacitors. |
| Feedback Reference | 0.600 V ±12 mV - sets precise output voltage via external resistor divider; line regulation ≤0.02%/V. |
| Quiescent Current | 30 nA in shutdown - preserves battery life in always-on or sleep-mode applications. |
| Internal Switch RDS(ON) | 130 mΩ (SOT-23) - minimizes conduction loss at full load; typical efficiency reaches 93% at 1.8-V/1-A output. |
| Thermal Shutdown | 165°C - protects against sustained overload or poor PCB thermal design; auto-recovery at ~150°C. |
Pinout & Package
LMR10515XMFE/NOPB is housed in a 5-pin SOT-23 package (2.92 mm × 2.84 mm × 1.0 mm) with exposed pad not connected internally; thermal performance relies on PCB copper area under the package body.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch node | Connects to inductor and catch diode anode; carries high di/dt switching current - requires short, low-inductance routing. |
| 2 (GND) | Signal and power ground | Primary return path for feedback network and internal circuitry; place bottom feedback resistor adjacent to this pin. |
| 3 (FB) | Feedback input | Senses output voltage via resistor divider; bias current <100 nA - enables high-impedance dividers to minimize quiescent loss. |
| 4 (EN) | Enable control | Logic-high active; threshold 1.8 V; must not float or exceed VIN + 0.3 V - use pull-down resistor if unused. |
| 5 (VIN) | Power input | Supplies both control circuitry and internal PMOS switch; requires local 22-µF ceramic input capacitor with low ESL. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network - reduces BOM count and layout sensitivity. |
| Internal soft-start | 600-µs controlled output ramp - limits inrush current during power-up, preventing input rail droop or reset glitches. |
| Pulse-by-pulse current limit | 1.8-A minimum trip level - provides robust short-circuit protection without latch-off, supporting hiccup or foldback behavior. |
| Output overvoltage protection | Triggers at FB = 1.15 × 0.6 V = 0.69 V - disables switch to prevent damage to downstream 1.8-V or 3.3-V logic. |
| Ultra-low shutdown IQ | 30 nA typical - extends battery runtime in standby mode; compatible with microcontroller GPIO wake-up control. |
Applications
| Portable Hand-Held Instruments | Battery-Powered Equipment |
|---|---|
Use Scenario: Powering ADCs, op-amps, and wireless transceivers in handheld multimeters and gas detectors. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 3.7-V Li-ion battery or 3.3-V rail to stable 1.8-V or 3.3-V supply. Use Value: 1.6-MHz operation and ceramic capacitor compatibility enable <100-mm² total solution size; 30-nA shutdown preserves battery charge during idle periods. |
Use Scenario: Supplying MCU cores and peripherals in Bluetooth LE sensors and wearable health monitors. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering 1.5-A peak current with fast transient response to handle burst-mode radio transmission. Use Value: 93% peak efficiency at 1-A load minimizes heat rise in sealed enclosures; internal soft-start prevents brownout during cold-start from depleted batteries. |
| Power Meters | Industrial Distributed Power |
Use Scenario: Providing isolated auxiliary supply for metrology ASICs and communication interfaces in smart electricity meters. IC Role / Device Role / Timing Role: Secondary regulator deriving 3.3-V logic rail from 5-V isolated DC-DC output. Use Value: -40°C to +125°C operating range ensures reliability across meter deployment environments; thermal shutdown prevents failure under sustained overload conditions. |
Use Scenario: Local regulation for FPGA I/O banks or industrial Ethernet PHYs in modular PLC backplanes. IC Role / Device Role / Timing Role: Compact, high-density buck converter placed near load to minimize IR drop and noise coupling. Use Value: SOT-23 footprint allows placement directly beneath QFP or BGA packages; current-mode control maintains stability despite varying input impedance from upstream converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62172DRVR | 2.25–5.5-V input, 1.2-A output, 2.25-MHz switching, 17-µA quiescent current in PWM mode. | Lacks ultra-low 30-nA shutdown; higher IQ limits battery life in long-idle applications. | Preferred when higher switching frequency and tighter output voltage accuracy (±1%) are prioritized over shutdown IQ. |
| MP2143GJ-Z | 4.5–16-V input, 3-A output, 1.4-MHz switching, 25-µA quiescent current, no integrated OVP. | Wider input range but incompatible with 3-V operation; lacks output overvoltage protection and soft-start. | Selected for higher-current industrial loads where input exceeds 4.5 V and external protection is acceptable. |
Compared with TPS62172DRVR and MP2143GJ-Z, the LMR10515XMFE/NOPB uniquely balances ultra-low shutdown IQ, 3-V minimum input support, and integrated OVP - making it optimal for battery-fed systems requiring fail-safe regulation below 3.3 V.
Availability
LMR10515XMFE/NOPB is available at Aetrix Electronics and suitable for portable hand-held instruments, battery-powered equipment, and industrial distributed power applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMR10515XMFE/NOPB 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
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.
The LMR10515XMFE/NOPB belongs to TI's LMR series of high-frequency, monolithic buck regulators designed specifically for space-constrained, high-efficiency point-of-load conversion in portable and battery-operated systems.
FAQ
What is the maximum output current capability of the LMR10515XMFE/NOPB?
The LMR10515XMFE/NOPB delivers up to 1.5 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). Its internal 130-mΩ PMOS switch and thermal shutdown at 165°C ensure reliable operation at full load; peak current limit is guaranteed ≥1.8 A across temperature.
Does the LMR10515XMFE/NOPB require external compensation components?
No, the LMR10515XMFE/NOPB is internally compensated. This eliminates the need for external compensation networks such as type-II or type-III error amplifier configurations, simplifying design and reducing bill-of-materials count while maintaining stability with standard ceramic output capacitors.
What is the function of the EN pin on the LMR10515XMFE/NOPB?
The EN pin on the LMR10515XMFE/NOPB is an active-high enable input with a 1.8-V threshold. When pulled high (>1.8 V), the device operates normally; when pulled low (<0.4 V), it enters ultra-low-power shutdown mode drawing only 30 nA. The pin must never be left floating and must not exceed VIN + 0.3 V.
Can the LMR10515XMFE/NOPB operate from a 3-V input source?
Yes, the LMR10515XMFE/NOPB supports input voltages from 3 V to 5.5 V. Its undervoltage lockout activates at 2.73 V (rising), ensuring reliable startup from fully charged single-cell Li-ion or Li-polymer batteries, and remains functional down to 3 V while delivering regulated output down to 0.6 V.
How does the LMR10515XMFE/NOPB protect against output overvoltage events?
The LMR10515XMFE/NOPB includes dedicated output overvoltage protection that monitors the FB pin. If the feedback voltage exceeds 15% above the 0.6-V internal reference (i.e., >0.69 V), the internal PMOS switch is immediately disabled to prevent damage to downstream 1.8-V or 3.3-V logic circuits.
LMR10515XMFE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.5V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMR10515XMFE/NOPB FAQ
1.How can I place an order for LMR10515XMFE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10515XMFE/NOPB 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 LMR10515XMFE/NOPB reliable?
The price and inventory of LMR10515XMFE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10515XMFE/NOPB is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10515XMFE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10515XMFE/NOPB?
LMR10515XMFE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10515XMFE/NOPB 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 LMR10515XMFE/NOPB?
For technical support, including LMR10515XMFE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10515XMFE/NOPB requirements.
6.How does Aetrix verify that LMR10515XMFE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10515XMFE/NOPB 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 LMR10515XMFE/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10515XMFE/NOPB?
All LMR10515XMFE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10515XMFE/NOPB, 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 LMR10515XMFE/NOPB part is unused and in its original packaging.
Return procedure for LMR10515XMFE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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