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Texas Instruments LM2853MH-1.5
- Part No.:
- LM2853MH-1.5
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MH-1.5.pdf
- Description:
- IC REG BUCK 1.5V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,818
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Product details
Overview
LM2853MH-1.5 from Texas Instruments is a 3A, 550 kHz synchronous buck regulator in an exposed-pad HTSSOP-14 package, delivering a factory-programmed 1.5 V output from 3.0–5.5 V input. It integrates internal 40 mΩ/32 mΩ MOSFETs, type-three compensation, and soft-start control-enabling compact point-of-load power for FPGA core rails.
For engineers reviewing the LM2853MH-1.5 datasheet, LM2853MH-1.5 pinout, LM2853MH-1.5 application, or LM2853MH-1.5 equivalent, key selection criteria include its 1.5 V ±1.13% output tolerance at 25°C, 12 µA shutdown current, thermal shutdown at 165°C, and compatibility with standard 4.7–6.8 µH inductors and 120–220 µF output capacitors.
Technical Context
The LM2853MH-1.5 implements voltage-mode PWM control with internal type-three compensation, eliminating external compensation components. Its dual-rail architecture separates AVIN (3.0–5.5 V control supply) from PVIN (1.5–5.5 V power input), supporting flexible system-level power sequencing.
Switching operation uses integrated high-side and low-side N-channel MOSFETs (RDS(ON) = 40 mΩ / 32 mΩ @ 3 A), operating at a fixed 550 kHz frequency with duty cycle range 0–100%. Soft-start is controlled via external capacitor on SS pin, with internal 450 kΩ pullup enabling precise startup timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 1.5 V ±1.13% (min/max over temp), verified at SNS pin in closed-loop configuration |
| Max Output Current | 3 A continuous load capability with thermal foldback protection above 125°C junction temperature |
| Input Voltage Range | AVIN: 3.0–5.5 V; PVIN: 1.5–5.5 V - enables split-rail operation for optimized efficiency and noise isolation |
| Switching Frequency | 550 kHz nominal (325–725 kHz range), enabling compact magnetics and predictable EMI profile |
| Quiescent Current | 0.85–2 mA operating; 12–50 µA in shutdown - supports battery-backed or always-on systems |
| Thermal Resistance | θJA = 38 °C/W (MXA14A package), dependent on PCB copper area under exposed pad |
| Protection Features | UVLO (2.47–3.0 V AVIN threshold), thermal shutdown (165°C, 10°C hysteresis), and peak current limit (3.6–5 A) |
Pinout & Package
LM2853MH-1.5 is housed in a 14-pin HTSSOP package (TI drawing PWP, JEDEC MO-153 variant) with exposed thermal pad (EP) internally connected to GND. The package requires soldering the EP to a dedicated PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVIN) | Control circuit supply input | Provides bias for internal logic, reference, and error amplifier; must be ≥3.0 V for enable and regulation |
| 2 (EN) | Enable control input | Active-high; internally pulled up; drives device into shutdown when pulled below 25% of AVIN |
| 3 (SGND) | Low-noise analog ground | Reference return for feedback and control circuits; must be isolated from PGND until single-point tie |
| 4 (SS) | Soft-start timing node | Connects to external capacitor (1–50 nF); sets output ramp time via internal 450 kΩ current source |
| 5, 12, 13 (NC) | No-connect terminals | Must be tied to SGND or PGND per layout guidelines; not internally bonded |
| 6, 7 (PVIN) | Power switch supply input | Feeds high-side/low-side FETs; accepts lower voltage than AVIN (e.g., 3.3 V PVIN with 5 V AVIN) |
| 8, 9 (SW) | Switch node | Drives external inductor; experiences full PVIN-to-GND swing at 550 kHz; requires short, wide trace |
| 10, 11 (PGND) | Power ground return | High-current return path for FETs and inductor; must connect directly to EP and bulk capacitor |
| 14 (SNS) | Output voltage sense input | High-impedance feedback node; connects to resistor divider or direct to load for remote sensing |
| EP (Exposed Pad) | Thermal & ground connection | Internally tied to GND but not primary ground path; requires ≥100 mm² copper pour for θJA spec |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 40 mΩ high-side + 32 mΩ low-side N-MOSFETs eliminate external switches and reduce BOM count |
| Type-Three Compensation | On-chip compensation network eliminates external op-amp and RC components, simplifying loop stability |
| Split-Rail Input Architecture | Independent AVIN/PVIN supplies allow optimized noise isolation and sequencing in multi-rail systems |
| Factory-Programmed Output | 1.5 V output set permanently in EEPROM - no external resistors required for feedback network |
| Robust Protection Suite | UVLO, thermal shutdown with hysteresis, and cycle-by-cycle current limiting ensure safe operation under fault |
Applications
| FPGA Core Power Supply | DSP Local Point-of-Load Regulation |
|---|---|
|
Use Scenario: Delivering stable 1.5 V rail to Xilinx Spartan-6 or Intel Cyclone IV FPGA core logic under dynamic load transients. IC Role / Device Role / Timing Role: Primary DC-DC buck converter regulating core voltage with fast transient response and tight DC accuracy. Use Value: Achieves ≤2 mV/A load regulation and <1.2% output tolerance across −40°C to +125°C, minimizing timing margin loss. |
Use Scenario: Powering TI C674x DSP I/O and memory interfaces in industrial motor control gateways. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator decoupling noisy digital domains from sensitive analog subsystems. Use Value: Low 12 µA shutdown current extends battery life in sleep modes; split-rail inputs suppress coupling from switching noise. |
| Broadband Network PHY Power | Industrial PLC I/O Module Supply |
|
Use Scenario: Generating 1.5 V for Ethernet PHY ICs (e.g., DP83848) in enterprise switches with strict EMI limits. IC Role / Device Role / Timing Role: Fixed-frequency synchronous buck providing clean, low-ripple power with minimal external components. Use Value: 550 kHz switching enables use of small 4.7 µH inductors and ceramic capacitors, reducing board area by >30% vs. 300 kHz alternatives. |
Use Scenario: Supplying isolated 1.5 V logic rails for analog-to-digital converters and digital isolators in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: High-reliability DC-DC stage meeting extended temperature (−40°C to +125°C) and long-lifecycle requirements. Use Value: Thermal shutdown with 10°C hysteresis prevents latch-up during ambient temperature excursions; RoHS-compliant HTSSOP package supports conformal coating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54318RTER | 3 A, 2.95–6 V input, adjustable output (0.8–3.3 V), 2.5 MHz switching, integrated compensation | Higher frequency enables smaller passives but increases EMI sensitivity; lacks factory-programmed 1.5 V option | Select when board space is constrained and adjustable output is acceptable; requires external feedback resistors |
| MP2315GJ-Z | 3 A, 4.5–28 V input, 1.5 V fixed output, 500 kHz, no split-rail support, lower thermal resistance (θJA = 30 °C/W) | Wider input range suits 12 V intermediate bus; no AVIN/PVIN separation limits noise-sensitive designs | Select for cost-sensitive industrial applications where input exceeds 5.5 V and split-rail isolation is unnecessary |
Compared with TPS54318RTER and MP2315GJ-Z, LM2853MH-1.5 uniquely combines factory-trimmed 1.5 V output, dual-rail input flexibility, and proven SIMPLE SWITCHER® reliability for FPGA/DSP core rails - avoiding resistor tolerances and layout compromises inherent in adjustable alternatives.
Availability
LM2853MH-1.5 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband PHY supply applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LM2853MH-1.5 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 leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2853MH-1.5 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, engineered for minimal external component count and robust performance in space-constrained, thermally demanding point-of-load applications.
FAQ
What is the output voltage tolerance specification for LM2853MH-1.5?
The LM2853MH-1.5 has a guaranteed output voltage tolerance of ±1.13% over temperature (−40°C to +125°C), corresponding to 1.4663 V to 1.5337 V at 25°C. This tolerance is measured at the SNS pin in closed-loop operation with AVIN = PVIN = 5 V, and reflects factory trimming of the internal reference and feedback divider.
Does LM2853MH-1.5 require external compensation components?
No, LM2853MH-1.5 integrates a complete type-three compensation network on-die, eliminating the need for external op-amps, capacitors, or resistors. This simplifies design and improves stability across recommended inductor (4.7–6.8 µH) and output capacitor (120–220 µF) ranges specified in the datasheet.
Can LM2853MH-1.5 operate with different voltages on AVIN and PVIN pins?
Yes, LM2853MH-1.5 supports split-rail operation: AVIN may be set to 5 V for control logic while PVIN is supplied at 3.3 V for the power stage. PVIN must always be ≤ AVIN, and both rails must remain within their respective absolute maximum ratings (AVIN: 3.0–5.5 V; PVIN: 1.5–5.5 V).
What is the recommended soft-start capacitor value for LM2853MH-1.5?
A 2.2 nF ceramic capacitor is recommended for LM2853MH-1.5 to achieve ~3 ms startup time. The SS pin sources a 2.2 µA current through an internal 450 kΩ resistor; using the RC time constant (τ = R × C), three τ periods yield 95% reference voltage settling. Values between 1 nF and 50 nF are supported.
Is LM2853MH-1.5 pin-compatible with other LM2853 variants like LM2853MH-1.2 or LM2853MH-3.3?
Yes, all LM2853MH-x variants share identical HTSSOP-14 (PWP) packaging, pinout, and footprint. Only the factory-programmed output voltage differs; no PCB changes are needed when substituting between LM2853MH-1.5, LM2853MH-1.2, or LM2853MH-3.3 in existing designs.
LM2853MH-1.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 550kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM2853MH-1.5 FAQ
1.How can I place an order for LM2853MH-1.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MH-1.5 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 LM2853MH-1.5 reliable?
The price and inventory of LM2853MH-1.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2853MH-1.5 is usually 5 days.
3.What payment methods are accepted for LM2853MH-1.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MH-1.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MH-1.5?
LM2853MH-1.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MH-1.5 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 LM2853MH-1.5?
For technical support, including LM2853MH-1.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MH-1.5 requirements.
6.How does Aetrix verify that LM2853MH-1.5 is sourced from the original manufacturer or authorized distributors?
All LM2853MH-1.5 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 LM2853MH-1.5 meets industry standards.
7.What is the process for return or replacement of LM2853MH-1.5?
All LM2853MH-1.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MH-1.5, 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 LM2853MH-1.5 part is unused and in its original packaging.
Return procedure for LM2853MH-1.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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