My Inquiry
My Account
Texas Instruments LM2853MH-1.8/NOPB
- Part No.:
- LM2853MH-1.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2853MH-1.8/NOPB.pdf
- Description:
- IC REG BUCK 1.8V 3A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:150
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2853MH-1.8/NOPB from Texas Instruments is a 3-A, 550-kHz synchronous buck regulator with factory-programmed 1.8 V output, 40 mΩ high-side and 32 mΩ low-side MOSFETs, input voltage range of 3 V to 5.5 V, and internal type-three compensation. It delivers precise point-of-load regulation for FPGA core supplies in telecom infrastructure equipment.
For engineers reviewing the LM2853MH-1.8/NOPB datasheet, LM2853MH-1.8/NOPB pinout, LM2853MH-1.8/NOPB application, or LM2853MH-1.8/NOPB equivalent, key selection criteria include output voltage accuracy (±1.1% over –40°C to 125°C), thermal performance (RθJA = 38°C/W), soft-start programmability via external capacitor, and HTSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
The LM2853MH-1.8/NOPB implements voltage-mode control with integrated PWM controller, power switches, and on-chip type-three compensation-eliminating external compensation components. Its 550 kHz fixed switching frequency enables compact magnetics while maintaining efficiency across 0–3 A load range.
It supports split-rail operation (AVIN and PVIN independent), features UVLO with 2.47 V rising threshold and 100 mV hysteresis, and includes thermal shutdown at 165°C with 10°C hysteresis. The device uses internal current sensing and peak-current-limit protection (3.6–5 A) without requiring external sense resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 1.8 V ±1.1% over –40°C to 125°C - ensures stable core rail for 1.8 V I/O or low-voltage logic without external feedback divider. |
| Max Output Current | 3 A continuous - supports high-current FPGA/DSP core domains without derating at 25°C ambient. |
| Input Voltage Range | 3 V to 5.5 V - compatible with single 3.3 V or 5 V system rails; PVIN may be as low as 1.5 V when AVIN ≥ PVIN. |
| Switching Frequency | 550 kHz (±35%) - enables use of 4.7–6.8 µH inductors and 100–220 µF output capacitors per TI-recommended design tables. |
| Quiescent Current | 12 µA in shutdown - minimizes standby power in always-on subsystems such as management controllers. |
| On-Resistance | 40 mΩ (high-side), 32 mΩ (low-side) - reduces conduction losses and improves full-load efficiency (>90% typical at 2 A, 5 V→1.8 V). |
| Soft-Start Control | External capacitor on SS pin (1–50 nF) - enables controlled ramp-up time (e.g., 2.2 nF ≈ 3 ms) to prevent inrush current and system brownouts. |
Pinout & Package
LM2853MH-1.8/NOPB is housed in a thermally enhanced 14-pin HTSSOP (PWP) package (5.00 mm × 4.40 mm) with exposed pad soldered to PCB ground plane for optimal thermal dissipation (RθJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AVIN) | Control circuit supply | Provides bias for internal logic and error amplifier; must be ≥3 V and ≥ PVIN for proper operation. |
| 2 (EN) | Enable input | Active-high; internally pulled up - device powers on by default unless driven low; VIH = 75% AVIN, VIL = 25% AVIN. |
| 3 (SGND) | Analog ground | Low-noise reference for feedback and control circuits; must be isolated from noisy power ground until star-point connection. |
| 4 (SS) | Soft-start timing node | Connects to external capacitor to set output ramp time; internal 20 pF + external C determines startup profile. |
| 5 (NC) | No-connect | Must be tied to ground; not internally connected - prevents floating node EMI and latch-up risk. |
| 6,7 (PVIN) | Power switch supply | High-current input for FETs; accepts 1.5–5.5 V; requires local 47 µF ceramic capacitor placed adjacent to pins. |
| 8,9 (SW) | Switch node | Drives external inductor; carries high di/dt - requires short, wide trace to minimize ringing and EMI. |
| 10,11 (PGND) | Power ground return | High-current return path for FETs and inductor; must connect directly to exposed pad and bulk capacitor ground. |
| 12,13 (NC) | No-connect | Both pins must be tied to ground; no internal connection - ensures mechanical stability and thermal conduction via exposed pad. |
| 14 (SNS) | Voltage sense input | Monitors regulated output via 200 kΩ resistor divider; connects to load-side of output capacitor for accurate remote sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Type-Three Compensation | Eliminates need for external compensation network - simplifies layout, reduces BOM count, and guarantees stability with recommended LO/CO ranges. |
| Internal 40 mΩ / 32 mΩ MOSFETs | Enables high-efficiency conversion without discrete power stage - reduces footprint, thermal interface complexity, and gate-drive component count. |
| Factory-Programmed Output | Fixed 1.8 V option eliminates external resistor divider - improves accuracy, reduces drift, and avoids layout sensitivity of feedback traces. |
| Low Standby Current (12 µA) | Supports energy-sensitive applications like battery-backed management units - extends hold-up time without sacrificing fast wake-up capability. |
| Exposed-Pad HTSSOP-14 Package | Delivers 38°C/W junction-to-ambient thermal resistance - allows full 3 A operation at 70°C ambient without forced air or heatsink. |
Applications
| Baseband Processor Core Supply | FPGA I/O Bank Regulation |
|---|---|
|
Use Scenario: Powering ARM-based baseband processors in 4G/LTE small cell radios where tight voltage tolerance and transient response are critical. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering clean 1.8 V core rail with <2 mV/A load regulation and <10 µs transient recovery. Use Value: Maintains processor stability during burst traffic loads; eliminates need for post-regulator LDOs due to inherent ripple rejection and accuracy. |
Use Scenario: Providing dedicated 1.8 V supply to FPGA I/O banks interfacing with DDR3 memory and high-speed serial links. IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to FPGA package to minimize IR drop and noise coupling. Use Value: Enables reliable signal integrity at >800 Mbps data rates by limiting output voltage deviation to ±1.1% across temperature and line variations. |
| Optical Line Terminal (OLT) Management Controller | Industrial Ethernet Switch PHY Power |
|
Use Scenario: Supplying 1.8 V to ARM Cortex-M7 microcontrollers managing GPON OLT firmware, diagnostics, and optical calibration. IC Role / Device Role / Timing Role: Always-on auxiliary regulator with ultra-low shutdown current (12 µA) and robust UVLO hysteresis (100 mV). Use Value: Extends backup battery life during AC loss events while ensuring deterministic restart behavior after brownout recovery. |
Use Scenario: Powering 1.8 V analog front-end and SerDes circuitry in multi-port industrial Ethernet switches operating in extended temperature (-40°C to 85°C). IC Role / Device Role / Timing Role: High-reliability buck converter with 150°C max junction temperature rating and MSL Level-1 reflow compatibility. Use Value: Guarantees uninterrupted operation in sealed enclosures with limited airflow - validated for 100% load at 85°C ambient per TI thermal characterization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54302DDCR | 3 A, 600 kHz, 3–18 V input; adjustable output via external resistors; no factory-programmed 1.8 V option. | Requires feedback divider and compensation tuning; better suited for designs needing multiple output voltages or input flexibility beyond 5.5 V. | Select when input voltage exceeds 5.5 V or when programmability justifies added BOM and layout complexity. |
| MP2332HGRT-Z | 3 A, 500 kHz, 4.5–28 V input; fixed 1.8 V version available; higher RDS(ON) (60/40 mΩ); no integrated compensation. | Needs external compensation network and larger input capacitance; less suitable for space-constrained 3.3 V input systems. | Consider only if wider input range (up to 28 V) is required and thermal margin permits higher conduction losses. |
Compared with TPS54302DDCR and MP2332HGRT-Z, LM2853MH-1.8/NOPB offers superior integration (no external compensation), tighter output accuracy (±1.1% vs ±2%), and optimized thermal performance in HTSSOP-14 - making it ideal for cost-sensitive, high-volume 3–5.5 V input applications demanding fixed 1.8 V with minimal design effort.
Availability
LM2853MH-1.8/NOPB is available at Aetrix Electronics and suitable for telecom infrastructure, industrial embedded controllers, and FPGA-based test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2853MH-1.8/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 communications markets.
The LM2853 product line delivers highly integrated, pin-compatible synchronous buck regulators targeting space-constrained, high-efficiency point-of-load applications in networking and computing systems - designed to reduce design cycle time and improve thermal reliability.
FAQ
What is the output voltage tolerance of LM2853MH-1.8/NOPB over temperature?
The LM2853MH-1.8/NOPB maintains output voltage within ±1.1% of 1.8 V across the full operating junction temperature range of –40°C to 125°C, as specified in the Electrical Characteristics table under "VOUT = 1.8 V option" with TJ = –40°C to 125°C. This tolerance includes initial accuracy, line regulation, and load regulation contributions - no external trimming is required.
Does LM2853MH-1.8/NOPB require external compensation components?
No, LM2853MH-1.8/NOPB integrates a complete type-three compensation network on-die. This eliminates the need for external capacitors or resistors in the feedback loop, significantly reducing design complexity and PCB area. Stability is guaranteed when using inductor and capacitor values within TI's recommended ranges (e.g., 4.7–6.8 µH LO and 100–220 µF CO for 1.8 V output).
Can LM2853MH-1.8/NOPB operate with separate AVIN and PVIN supplies?
Yes, LM2853MH-1.8/NOPB supports split-rail operation: AVIN powers the control circuitry (must be ≥3 V), while PVIN supplies the power FETs (can be as low as 1.5 V). PVIN must never exceed AVIN. This configuration allows optimization of efficiency and noise isolation - for example, using a clean 3.3 V AVIN and a switched 5 V PVIN in mixed-signal systems.
What is the maximum allowable junction temperature for LM2853MH-1.8/NOPB?
The absolute maximum junction temperature for LM2853MH-1.8/NOPB is 150°C, with thermal shutdown activating at 165°C and 10°C hysteresis. The device is rated for continuous operation up to 125°C junction temperature. At 70°C ambient with standard 2-layer PCB and full 3 A load, the measured junction temperature remains below 120°C when the exposed pad is properly soldered to a solid ground plane.
How is soft-start configured on LM2853MH-1.8/NOPB?
Soft-start on LM2853MH-1.8/NOPB is controlled by an external capacitor connected between the SS pin (Pin 4) and SGND. A 2.2 nF capacitor yields ~3 ms startup time; acceptable range is 1–50 nF. The internal DAC charges this capacitor to set the reference voltage, enabling controlled output ramp without inrush current. No resistor is needed - the internal 450 kΩ soft-start resistance defines the RC time constant.
LM2853MH-1.8/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):
- 1.8V
- 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-1.8/NOPB FAQ
1.How can I place an order for LM2853MH-1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2853MH-1.8/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-1.8/NOPB reliable?
The price and inventory of LM2853MH-1.8/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-1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM2853MH-1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2853MH-1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2853MH-1.8/NOPB?
LM2853MH-1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2853MH-1.8/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-1.8/NOPB?
For technical support, including LM2853MH-1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2853MH-1.8/NOPB requirements.
6.How does Aetrix verify that LM2853MH-1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2853MH-1.8/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-1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM2853MH-1.8/NOPB?
All LM2853MH-1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2853MH-1.8/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-1.8/NOPB part is unused and in its original packaging.
Return procedure for LM2853MH-1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2853MH-1.8/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
