My Inquiry
My Account
Texas Instruments LMR51610YDBVR
- Part No.:
- LMR51610YDBVR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
LMR51610YDBVR.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:826
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMR51610YDBVR from Texas Instruments is a 1-A, 4-V to 65-V input synchronous buck converter in SOT-23-6 package, featuring 1.1-MHz PFM switching, ±1.5% reference voltage accuracy, 80-ns minimum on-time, and -40°C to 150°C junction temperature range. It delivers regulated DC power for industrial PLCs, smart meters, and major appliances with rugged transient protection up to 70 V.
For engineers reviewing the LMR51610YDBVR datasheet, LMR51610YDBVR pinout, LMR51610YDBVR application, or LMR51610YDBVR equivalent, key selection considerations include its 1.1-MHz PFM operation for high light-load efficiency, 70-V input transient tolerance, integrated bootstrap driver, monotonic start-up with pre-biased output, and precision enable with adjustable UVLO.
Technical Context
The LMR51610YDBVR employs fixed-frequency peak-current mode control with internal compensation, enabling stable regulation using minimal external components. Its 1.1-MHz PFM operation dynamically reduces switching frequency at light load to maximize efficiency while maintaining regulation.
It integrates high-side and low-side NMOS switches with 0.7-Ω/0.36-Ω typical RDS(on), supports duty cycles up to 98%, and implements cycle-by-cycle current limiting, hiccup-mode short-circuit protection, and thermal shutdown at 165°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 65 V - supports wide industrial unregulated rails including 12 V, 24 V, 36 V, 48 V, and 65 V systems. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in space-constrained designs. |
| Switching Frequency | 1.1 MHz (±13%) - enables use of smaller magnetics and capacitors; PFM mode improves light-load efficiency. |
| Reference Voltage | 0.8 V ±1.5% - ensures tight output regulation across temperature; sets adjustable VOUT from 0.8 V to 28 V via FB divider. |
| Min. On-Time | 80 ns - supports high step-down ratios (e.g., 48 V → 3.3 V) without requiring frequency foldback at nominal conditions. |
| Junction Temp. Range | –40°C to +150°C - qualified for harsh industrial environments including motor drives and factory automation. |
| UVLO Threshold | 3.82 V (rising), 3.4 V (falling), 0.25 V hysteresis - provides robust input rail monitoring and prevents erratic startup. |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 2.80 mm footprint with 0.95 mm height; thermally enhanced for 1-A operation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB | Bootstrap capacitor connection | Connects 100-nF ceramic capacitor to SW; supplies gate drive for integrated high-side MOSFET. |
| GND | Power ground | Internal source node of low-side FET; must be tied directly to system ground and CIN/COUT ground planes. |
| FB | Feedback input | Analog input sensing output voltage via resistor divider; never shorted to ground during operation. |
| EN | Enable control | Precision analog input: 1.227 V typical turn-on threshold; supports external UVLO divider or direct VIN tie. |
| VIN | Input supply | Connects to input source and bypass capacitors; powers internal bias LDO and high-side driver circuitry. |
| SW | Switch node | Drives external inductor; internally connects drain of low-side FET and source of high-side FET. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode; reduces conduction losses and improves full-load efficiency by ~3–5%. |
| Internal compensation | Enables stable loop response with only FB divider and input/output capacitors-no external compensation network required. |
| Monotonic start-up with pre-biased output | Prevents reverse current flow into powered outputs during hot-plug or system sequencing events. |
| Short-circuit protection with hiccup mode | Shuts down after fault detection, waits ~30 ms, then retries-limits power dissipation and prevents thermal runaway. |
| Input transient protection up to 70 V | Withstands automotive load-dump surges and industrial line transients without external clamping components. |
Applications
| PLC Power Supply | Smart Meter DC-DC Stage |
|---|---|
Use Scenario: Provides isolated 3.3-V or 5-V rail for microcontroller, ADC, and RF modules in programmable logic controllers operating from 24-V industrial bus. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering clean, regulated low-voltage power from noisy 24-V field supply. Use Value: 1.1-MHz PFM operation maintains >85% efficiency at 10-mA load; 70-V transient rating eliminates need for upstream TVS. |
Use Scenario: Generates stable 3.3-V supply for metrology SoC and NB-IoT modem in utility smart meters powered from 12-V battery or AC adapter. IC Role / Device Role / Timing Role: High-reliability buck converter handling wide input variation (10–60 V) and long-term operation at elevated ambient temperatures. Use Value: –40°C to 150°C junction rating ensures functionality in outdoor meter enclosures; 0.8-V reference enables precise 3.3-V output within ±20 mV. |
| Major Appliance Control Board | Industrial Sensor Node Power |
Use Scenario: Powers MCU, display driver, and touch controller on washing machine or oven control board supplied from 48-V intermediate bus. IC Role / Device Role / Timing Role: Compact, thermally efficient point-of-load regulator replacing discrete buck solutions in space-limited PCBs. Use Value: SOT-23-6 footprint saves >40% board area vs. SOIC-8 alternatives; 98% max duty cycle supports low-dropout operation near 48 V → 5 V. |
Use Scenario: Supplies 5-V or 12-V rail to industrial IoT sensor nodes deployed in factory-floor environments with fluctuating 24-V supply. IC Role / Device Role / Timing Role: Ruggedized DC-DC stage tolerant to brownouts, surges, and extended temperature cycling. Use Value: Precision enable allows coordinated power-up sequencing with host processor; hiccup-mode protection prevents latch-up during cable short events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR51610XDBVR | 400-kHz PFM switching (vs. 1.1 MHz); same 1-A rating, package, and feature set. | Better suited for designs prioritizing EMI reduction over size; requires larger inductors/capacitors. | Select when lower switching frequency eases EMI filtering or when higher light-load efficiency at <100 kHz is critical. |
| LMR54410RGER | 2.5-A output, 2.1-MHz FPWM/PFM, 3-V to 36-V input, WQFN-10 package; no 70-V transient rating. | Targets higher-current applications with tighter board space constraints but lacks 65-V input capability. | Choose when >1-A load current is needed and input voltage stays below 36 V; not suitable for 48-V+ industrial rails. |
Compared with LMR51610XDBVR, the LMR51610YDBVR achieves smaller passive component size and better high-frequency EMI performance due to its 1.1-MHz operation, while retaining identical thermal robustness and protection features. Against LMR54410RGER, it trades higher current capability for wider input range and superior surge resilience-critical for legacy industrial infrastructure.
Availability
LMR51610YDBVR is available at Aetrix Electronics and suitable for industrial PLCs, smart metering systems, and major appliance control boards requiring stable component supply, long lifecycle support, and guaranteed traceable sourcing.
Supply support for LMR51610YDBVR 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 focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets with high-reliability power management solutions.
The LMR516xx family is designed specifically for rugged industrial DC-DC conversion-emphasizing wide input range, high temperature operation, transient resilience, and minimal external component count in ultra-small packages.
FAQ
What is the maximum input voltage the LMR51610YDBVR can withstand during transients?
The LMR51610YDBVR supports input transients up to 70 V, exceeding its 65-V maximum continuous operating voltage. This rating allows reliable operation during automotive load-dump events or industrial power surges without external clamping components. The device remains functional and protected under these conditions per its absolute maximum ratings specification.
Does the LMR51610YDBVR require an external bootstrap capacitor?
Yes, the LMR51610YDBVR requires a 100-nF ceramic capacitor (X7R/X5R, ≥16 V rating) between the CB and SW pins to supply gate drive voltage for the internal high-side MOSFET. This capacitor is refreshed during low-side conduction and is essential for proper high-side switching operation and efficiency.
Can the LMR51610YDBVR operate with a pre-biased output?
Yes, the LMR51610YDBVR supports monotonic start-up into a pre-biased output, preventing reverse current flow during hot-plug or system sequencing. This behavior is enabled by internal circuitry that monitors FB voltage and controls soft-start timing independently of output voltage state.
What is the feedback reference voltage accuracy of the LMR51610YDBVR over temperature?
The LMR51610YDBVR features a ±1.5% reference voltage (0.8 V) over the full –40°C to +150°C junction temperature range. This tight tolerance ensures stable output regulation across industrial operating conditions without requiring post-production calibration or trimming.
How does the LMR51610YDBVR handle short-circuit faults?
The LMR51610YDBVR uses hiccup-mode short-circuit protection: upon detecting sustained overload or output short, it shuts down, waits ~30 ms, then attempts restart. This limits average power dissipation and prevents thermal damage while allowing automatic recovery once the fault clears-no manual reset required.
LMR51610YDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- SOT-23-6
- 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):
- 4V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
LMR51610YDBVR FAQ
1.How can I place an order for LMR51610YDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR51610YDBVR 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 LMR51610YDBVR reliable?
The price and inventory of LMR51610YDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR51610YDBVR is usually 5 days.
3.What payment methods are accepted for LMR51610YDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR51610YDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR51610YDBVR?
LMR51610YDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR51610YDBVR 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 LMR51610YDBVR?
For technical support, including LMR51610YDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR51610YDBVR requirements.
6.How does Aetrix verify that LMR51610YDBVR is sourced from the original manufacturer or authorized distributors?
All LMR51610YDBVR 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 LMR51610YDBVR meets industry standards.
7.What is the process for return or replacement of LMR51610YDBVR?
All LMR51610YDBVR units undergo pre-shipment inspection (PSI). If there is an issue with LMR51610YDBVR, 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 LMR51610YDBVR part is unused and in its original packaging.
Return procedure for LMR51610YDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR51610YDBVR 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…
