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Texas Instruments LM2853MHX-1.0
- Part No.:
- LM2853MHX-1.0
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MHX-1.0.pdf
- Description:
- IC REG BUCK 1V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2853MHX-1.0 from Texas Instruments is a 3A, 550 kHz synchronous buck regulator in an exposed-pad HTSSOP-14 package, delivering a factory-programmed 1.0 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, low-component-count point-of-load regulation for FPGA core supplies.
For engineers reviewing the LM2853MHX-1.0 datasheet, LM2853MHX-1.0 pinout, LM2853MHX-1.0 application, or LM2853MHX-1.0 equivalent, key selection criteria include its fixed 1.0 V output tolerance (±2.25%), 12 µA shutdown current, thermal shutdown at 165 °C, and compatibility with standard 4.7–6.8 µH inductors and 100–220 µF output capacitors per TI's recommended design ranges.
Technical Context
The LM2853MHX-1.0 implements voltage-mode PWM control with integrated power FETs and on-chip type-three compensation, eliminating external compensation components. Its dual-rail capability allows separate AVIN (3.0–5.5 V) and PVIN (1.5–5.5 V) supplies, supporting split-rail operation where PVIN ≤ AVIN.
It features internal current limiting (3.6–5 A), UVLO with 2.47 V rising threshold and 50–260 mV hysteresis, and switch-node protection that disables switching under no-load conditions until load is applied-ensuring safe startup and fault recovery without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±2.25% (0.9775 V to 1.0225 V), factory-programmed via EEPROM-no external feedback resistors required. |
| Max Output Current | 3 A continuous, supported by internal 40 mΩ high-side and 32 mΩ low-side MOSFETs-enables single-regulator core supply for mid-power processors. |
| Input Voltage Range | AVIN: 3.0–5.5 V; PVIN: 1.5–5.5 V-allows flexible rail sourcing and split-rail operation with PVIN ≤ AVIN. |
| Switching Frequency | 550 kHz nominal (325–725 kHz range), enabling compact magnetics and predictable EMI profile without external frequency setting. |
| Quiescent Current | 12 µA in shutdown (EN = 0 V), minimizing system standby power loss in battery-backed or always-on applications. |
| Thermal Protection | Thermal shutdown at 165 °C with 10 °C hysteresis-prevents damage during sustained overload or poor PCB thermal design. |
| Package | HTSSOP-14 with exposed pad (PWP drawing, MXA14A)-provides 38 °C/W θJA and requires soldered GND connection to pad for optimal thermal performance. |
Pinout & Package
Package: HTSSOP-14 with exposed thermal pad (TI package drawing PWP, JEDEC MO-153 variant MXA14A). The exposed pad is internally connected to GND and must be soldered to a PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVIN) | Control circuit supply | Provides bias for internal logic and error amplifier; must be ≥3.0 V and ≤5.5 V; local 1 µF ceramic bypass recommended. |
| 2 (EN) | Enable input | Active-high enable with internal pullup; drives high (>75% AVIN) to activate, low (<25% AVIN) to shut down; draws only 1.5 µA when pulled low. |
| 3 (SGND) | Analog ground | Low-noise reference for control circuitry; must be isolated from power ground (PGND) at chip level and joined at single-point system ground. |
| 4 (SS) | Soft-start capacitor node | Connects to external capacitor (1–50 nF) to control output ramp time; internal DAC charges SS to set reference voltage linearly during startup. |
| 5 (NC) | No-connect | Must be tied to SGND; not internally connected-ensures mechanical stability and noise immunity. |
| 6,7 (PVIN) | Power FET supply | High-current input for internal switches; accepts 1.5–5.5 V; requires low-ESR bulk capacitor placed adjacent to pins. |
| 8,9 (SW) | Switch node | Drives external inductor; experiences full PVIN-to-GND voltage swing at 550 kHz; layout must minimize trace inductance and area. |
| 10,11 (PGND) | Power ground return | Return path for high-frequency switch currents; must connect directly to input/output capacitor grounds and exposed pad. |
| 12,13 (NC) | No-connect | Both must be tied to PGND; unused pins included for mechanical symmetry and thermal conduction via exposed pad. |
| 14 (SNS) | Output voltage sense | High-impedance feedback input referenced to SGND; connects directly to load for accurate remote sensing-minimizes IR drop errors. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates external compensation network-reduces BOM count and layout sensitivity while maintaining ≥45° phase margin across recommended LO/CO ranges. |
| Factory-Programmed Output | 1.0 V output set permanently in EEPROM-avoids resistor tolerance drift, eliminates feedback divider errors, and ensures consistent output across production lots. |
| Split-Rail Input Architecture | Independent AVIN and PVIN supplies allow optimization of control logic noise immunity (via clean AVIN) and power stage efficiency (via lower PVIN), e.g., 5 V AVIN / 3.3 V PVIN. |
| Switch-Node Protection Logic | Monitors SW voltage to disable switching during overvoltage or no-load conditions-prevents shoot-through and enables graceful restart after fault clearance. |
| Exposed Thermal Pad (EP) | Internally connected to GND; soldering EP to PCB ground plane reduces θJA to 38 °C/W and improves load regulation by stabilizing die temperature. |
Applications
| FPGA Core Power Supply | DSP Local Voltage Regulation |
|---|---|
|
Use Scenario: Providing stable 1.0 V core voltage to Xilinx Spartan-6 or Intel Cyclone IV FPGA banks requiring tight transient response and low ripple. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator delivering up to 3 A with <2.25% output tolerance and fast load-step recovery enabled by internal compensation. Use Value: Eliminates need for external compensation components and reduces total solution size by >30% versus discrete controller + MOSFET solutions. |
Use Scenario: Generating 1.0 V supply for TI C674x DSP cores operating at 300–1 GHz, where PSRR and thermal stability are critical. IC Role / Device Role / Timing Role: Point-of-load regulator with dedicated AVIN/PVIN rails-AVIN powered from clean 3.3 V LDO, PVIN from 5 V system rail. Use Value: Achieves <15 mV peak-to-peak output ripple at 3 A load and maintains regulation within spec over −40 °C to +125 °C junction temperature. |
| Broadband Router SoC Power | Industrial PLC I/O Module |
|
Use Scenario: Powering 1.0 V ARM Cortex-A9 cores in residential gateway routers with strict standby power budgets. IC Role / Device Role / Timing Role: High-efficiency buck converter with 12 µA shutdown current and automatic enable via internal AVIN pullup-no external EN control needed. Use Value: Enables sub-50 µW system standby power when combined with low-leakage input/output capacitors and optimized inductor DCR. |
Use Scenario: Regulating 1.0 V for microcontroller peripherals in DIN-rail mounted PLC modules subject to wide ambient temperature swings. IC Role / Device Role / Timing Role: Robust power IC with thermal shutdown (165 °C) and UVLO hysteresis (50–260 mV)-ensures reliable operation in unventilated enclosures. Use Value: Maintains regulation over −40 °C to +125 °C junction range and survives 1500 V ESD events per HBM, meeting IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54302DDCR | 3 A, 1.0 V fixed output, 2.5–6 V input, 500 kHz switching, no internal compensation-requires external RC network. | Higher minimum input (2.5 V vs. 3.0 V AVIN); lacks split-rail support; lower thermal resistance (θJA = 33 °C/W). | Preferred when board space allows external compensation and tighter input voltage range is acceptable. |
| MP2315GJ-Z | 3 A, adjustable 0.8–6 V output via external resistors, 4.5–28 V input, 500 kHz, integrated compensation. | Wider input range but higher minimum input (4.5 V); no factory-fixed 1.0 V option-requires precision feedback resistors. | Selected when input voltage exceeds 5.5 V or programmability justifies added BOM cost and layout complexity. |
Compared with TPS54302DDCR and MP2315GJ-Z, the LM2853MHX-1.0 offers guaranteed 1.0 V accuracy without resistor tolerances, split-rail flexibility for noise-sensitive systems, and simplified layout due to fully integrated compensation-making it optimal for space-constrained, high-reliability 3.0–5.5 V input designs.
Availability
LM2853MHX-1.0 is available at Aetrix Electronics and suitable for FPGA core power, DSP local regulation, and broadband networking infrastructure requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LM2853MHX-1.0 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 LM2853MHX-1.0 belongs to TI's SIMPLE SWITCHER® synchronous buck regulator family, designed specifically for low-voltage, high-current point-of-load applications in communications, computing, and industrial systems where minimal external components and robust thermal performance are essential.
FAQ
What is the output voltage tolerance of the LM2853MHX-1.0?
The LM2853MHX-1.0 delivers a factory-programmed 1.0 V output with guaranteed tolerance of ±2.25% (0.9775 V to 1.0225 V) across −40 °C to +125 °C junction temperature and full line/load conditions. This specification is verified per Electrical Characteristics table in SNVS459 and applies without external feedback components.
Does the LM2853MHX-1.0 require external compensation components?
No, the LM2853MHX-1.0 integrates a complete type-three compensation network on-die. This eliminates external op-amp, capacitor, and resistor networks-reducing design time, BOM count, and sensitivity to layout parasitics while ensuring stability with TI-recommended inductor (4.7–6.8 µH) and output capacitor (100–220 µF) values.
Can the LM2853MHX-1.0 operate with different voltages on AVIN and PVIN?
Yes, the LM2853MHX-1.0 supports split-rail operation: AVIN powers the control circuitry (3.0–5.5 V), while PVIN supplies the power FETs (1.5–5.5 V). PVIN must always be ≤ AVIN. This architecture isolates noise-sensitive analog blocks from high-current switching paths-improving PSRR and transient response in the LM2853MHX-1.0.
What is the recommended soft-start capacitor value for the LM2853MHX-1.0?
Texas Instruments recommends a soft-start capacitor between 1 nF and 50 nF on the SS pin of the LM2853MHX-1.0. A 2.2 nF ceramic capacitor yields ~3 ms startup time. Values outside this range may cause erratic startup or violate internal fault-handling timing-per Applications Information section of SNVS459.
Is the exposed thermal pad of the LM2853MHX-1.0 electrically connected?
Yes, the exposed pad (EP) of the LM2853MHX-1.0 is internally connected to GND. It must be soldered to a PCB ground plane-not used as the sole GND connection-to achieve the specified 38 °C/W θJA and ensure stable regulation. Failure to solder EP degrades thermal performance and may trigger premature thermal shutdown.
LM2853MHX-1.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 1V
- 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
LM2853MHX-1.0 FAQ
1.How can I place an order for LM2853MHX-1.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MHX-1.0 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 LM2853MHX-1.0 reliable?
The price and inventory of LM2853MHX-1.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2853MHX-1.0 is usually 5 days.
3.What payment methods are accepted for LM2853MHX-1.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MHX-1.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MHX-1.0?
LM2853MHX-1.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MHX-1.0 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 LM2853MHX-1.0?
For technical support, including LM2853MHX-1.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MHX-1.0 requirements.
6.How does Aetrix verify that LM2853MHX-1.0 is sourced from the original manufacturer or authorized distributors?
All LM2853MHX-1.0 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 LM2853MHX-1.0 meets industry standards.
7.What is the process for return or replacement of LM2853MHX-1.0?
All LM2853MHX-1.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MHX-1.0, 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 LM2853MHX-1.0 part is unused and in its original packaging.
Return procedure for LM2853MHX-1.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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