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Texas Instruments LM2853MH-3.3/NOPB
- Part No.:
- LM2853MH-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MH-3.3/NOPB.pdf
- Description:
- IC REG BUCK 3.3V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:149
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Product details
Overview
LM2853MH-3.3/NOPB from Texas Instruments is a 3-A, 550-kHz synchronous buck regulator with factory-programmed 3.3 V output, 3 V to 5.5 V input range, internal 40 mΩ/32 mΩ MOSFETs, and voltage-mode control-designed for FPGA/DSP core power in compact point-of-load systems.
For engineers reviewing the LM2853MH-3.3/NOPB datasheet, LM2853MH-3.3/NOPB pinout, LM2853MH-3.3/NOPB application, or LM2853MH-3.3/NOPB equivalent, key selection criteria include output voltage accuracy (±0.7% over –40°C to 125°C), thermal performance (RθJA = 38°C/W), soft-start programmability, and HTSSOP-14 exposed-pad thermal management.
Technical Context
The LM2853MH-3.3/NOPB implements voltage-mode PWM control with integrated type-three compensation, eliminating external compensation components. Its dual-rail capability allows independent AVIN (control logic) and PVIN (power stage) supplies, with PVIN ≤ AVIN.
It features internal PFET/NFET switches (RDS(ON) = 40 mΩ / 32 mΩ), 12 µA shutdown current, 550 kHz fixed switching frequency (±30% variation over temperature), and thermal shutdown at 165°C with 10°C hysteresis-optimized for stable 3.3 V/3 A delivery under dynamic load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 3.3 V ±0.7% (3.2257 V to 3.3743 V) over –40°C to 125°C junction temperature |
| Max Output Current | 3 A continuous load with thermal derating above 85°C ambient in standard PCB layout |
| Input Voltage Range | 3 V to 5.5 V on AVIN; 1.5 V to 5.5 V on PVIN-supports split-rail operation with PVIN ≤ AVIN |
| Switching Frequency | 550 kHz nominal (325–725 kHz range), enabling compact 4.7–6.8 µH inductor selection per TI design guidelines |
| Quiescent Current | 0.85–2 mA operating current; 12–50 µA shutdown current-enables low-power standby modes |
| Thermal Resistance | RθJA = 38°C/W (HTSSOP-14 PWP package with exposed pad soldered to PCB ground plane) |
| Protection Features | UVLO (2.47 V rising threshold), cycle-by-cycle current limit (3.6–5 A), and thermal shutdown (165°C +10°C hysteresis) |
Pinout & Package
LM2853MH-3.3/NOPB uses a 14-pin HTSSOP (PWP) package with 5.00 mm × 4.40 mm body size and thermally enhanced exposed pad (EP), which must be soldered to a PCB ground plane but not used as primary GND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AVIN | Control circuit supply | Provides regulated bias for internal logic; requires local 1 µF ceramic bypass |
| 2 EN | Enable input | Active-high enable; internally pulled up-drives high to activate regulator |
| 3 SGND | Analog ground | Low-noise reference for feedback and control circuits; separate from PGND |
| 4 SS | Soft-start capacitor node | Connects to external capacitor (1–50 nF) to control ramp rate of output voltage |
| 5 NC | No connect | Must be tied to ground; no internal connection |
| 6,7 PVIN | Power switch supply | High-current input for internal FETs; requires low-ESR bulk capacitor placement adjacent to pins |
| 8,9 SW | Switch node | Drives external inductor; high dV/dt node requiring short, wide trace routing |
| 10,11 PGND | Power ground | Return path for high-current switching loop; must be low-inductance connection to input/output capacitors |
| 12,13 NC | No connect | Both pins must be tied to ground; no internal connection |
| 14 SNS | Voltage sense input | Resistive divider feedback node; connect directly to load for accurate remote sensing |
| EP | Exposed pad | Internally connected to GND; mandatory soldering to PCB thermal plane for RθJA compliance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates external compensation network-reduces BOM count and simplifies stability tuning for 4.7–6.8 µH inductors |
| Factory-Programmed Output | Fixed 3.3 V output set at wafer level-no external resistors required; avoids tolerance stack-up in feedback path |
| Internal Power MOSFETs | 40 mΩ high-side PFET + 32 mΩ low-side NFET-enables >90% efficiency at 3 A with 5 V input |
| Split-Rail Input Architecture | Independent AVIN (3–5.5 V) and PVIN (1.5–5.5 V) supplies-allows optimization of control logic and power stage voltages |
| Exposed-Pad Thermal Management | HTSSOP-14 PWP package with soldered EP achieves 38°C/W junction-to-ambient-supports full 3 A load at 85°C ambient |
Applications
| Local FPGA Core Power | Industrial I/O Module Regulation |
|---|---|
|
Use Scenario: Supplying 3.3 V to Xilinx Spartan-7 FPGA configuration and I/O banks in space-constrained PLC modules. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 3.3 V at up to 3 A with fast transient response to logic state changes. Use Value: Internal compensation and 550 kHz switching enable small 4.7 µH inductor + 120 µF output capacitor solution, reducing board area by >35% vs. discrete controller designs. |
Use Scenario: Generating 3.3 V rail for isolated CAN transceivers and analog front-end ADCs in DIN-rail mounted industrial gateways. IC Role / Device Role / Timing Role: Main DC-DC converter providing clean, low-noise 3.3 V supply with tight line/load regulation (±0.7%) across wide temperature range. Use Value: Dual-rail inputs allow PVIN = 3.3 V (from upstream converter) and AVIN = 5 V (from auxiliary supply), improving system-level efficiency and fault isolation. |
| Broadband Access Equipment | Embedded Vision Sensor Hub |
|
Use Scenario: Powering 3.3 V PHY interfaces and packet processors in GPON OLT line cards with strict thermal limits. IC Role / Device Role / Timing Role: High-efficiency buck regulator managing 3 A peak loads during burst data transmission with minimal thermal rise. Use Value: Exposed-pad HTSSOP package and 38°C/W RθJA enable operation at full load without heatsink in 70°C ambient telecom environments. |
Use Scenario: Supplying 3.3 V to MIPI CSI-2 image sensor array and companion ISP in compact edge AI cameras. IC Role / Device Role / Timing Role: Low-noise, tightly regulated power source ensuring consistent sensor analog performance and clock jitter <1 ps RMS. Use Value: Soft-start pin (SS) enables controlled 3 ms voltage ramp-prevents inrush current-induced brownout in multi-rail camera power trees. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54331DR | 3 A, 570 kHz, adjustable output (0.8–6 V) via external resistor divider; no factory programming; RDS(ON) = 110 mΩ/140 mΩ | Requires external feedback resistors and compensation; less efficient at 3.3 V due to higher FET RDS(ON) | Choose when adjustable output or different voltage is needed; avoid if fixed 3.3 V and minimal BOM are priorities. |
| MP2333HG-33 | 3 A, 1.4 MHz, fixed 3.3 V, QFN-10 package (3 mm × 3 mm); RDS(ON) = 45 mΩ/25 mΩ; no split-rail support | Higher switching frequency enables smaller magnetics but lacks AVIN/PVIN separation and thermal performance (RθJA ≈ 50°C/W) | Choose for ultra-compact layouts where thermal headroom exceeds 65°C ambient; avoid in high-reliability industrial systems requiring robust thermal margin. |
Compared with TPS54331DR and MP2333HG-33, LM2853MH-3.3/NOPB delivers superior thermal performance (38°C/W), factory-trimmed 3.3 V accuracy (±0.7%), and split-rail flexibility-making it optimal for thermally constrained, fixed-voltage FPGA and industrial I/O applications where layout simplicity and long-term stability are critical.
Availability
LM2853MH-3.3/NOPB is available at Aetrix Electronics and suitable for FPGA core power, industrial I/O modules, and broadband access equipment requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.
Supply support for LM2853MH-3.3/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 leader specializing in analog and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The LM2853 product line delivers highly integrated synchronous buck regulators targeting space- and thermally constrained point-of-load applications in communications infrastructure, industrial automation, and embedded computing.
FAQ
What is the output voltage tolerance of LM2853MH-3.3/NOPB over temperature?
The LM2853MH-3.3/NOPB has a factory-programmed output voltage of 3.3 V with guaranteed tolerance of ±0.7% (3.2257 V to 3.3743 V) across the full operating junction temperature range of –40°C to 125°C, as specified in the Electrical Characteristics table under VOUT parameter.
Does LM2853MH-3.3/NOPB require external compensation components?
No, LM2853MH-3.3/NOPB integrates a complete type-three compensation network on-die. This eliminates the need for external compensation capacitors or resistors, significantly simplifying design and improving reliability compared to controllers requiring external loop compensation.
What is the recommended minimum soft-start capacitor value for LM2853MH-3.3/NOPB?
The LM2853MH-3.3/NOPB supports soft-start capacitors from 1 nF to 50 nF. A 2.2 nF ceramic capacitor is recommended for ~3 ms startup time, as validated in TI's typical application circuit (Table 4) and soft-start timing analysis in Section 8.1.2 of the datasheet.
Can LM2853MH-3.3/NOPB operate with separate AVIN and PVIN supplies?
Yes, LM2853MH-3.3/NOPB supports split-rail operation: AVIN powers the control circuitry (3–5.5 V), while PVIN powers the power FETs (1.5–5.5 V), with PVIN required to be ≤ AVIN. This enables optimized efficiency and fault isolation in multi-rail systems.
What package type and thermal specifications apply to LM2853MH-3.3/NOPB?
LM2853MH-3.3/NOPB uses the HTSSOP-14 (PWP) package with 5.00 mm × 4.40 mm body and exposed thermal pad. Its junction-to-ambient thermal resistance is 38°C/W when the exposed pad is properly soldered to a PCB ground plane, enabling full 3 A operation at 85°C ambient.
LM2853MH-3.3/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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):
- 3.3V
- 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-3.3/NOPB FAQ
1.How can I place an order for LM2853MH-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MH-3.3/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 LM2853MH-3.3/NOPB reliable?
The price and inventory of LM2853MH-3.3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2853MH-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM2853MH-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MH-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MH-3.3/NOPB?
LM2853MH-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MH-3.3/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 LM2853MH-3.3/NOPB?
For technical support, including LM2853MH-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MH-3.3/NOPB requirements.
6.How does Aetrix verify that LM2853MH-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2853MH-3.3/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 LM2853MH-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM2853MH-3.3/NOPB?
All LM2853MH-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MH-3.3/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 LM2853MH-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM2853MH-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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