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Texas Instruments LM61460AANRJRR
- Part No.:
- LM61460AANRJRR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LM61460AANRJRR.pdf
- Description:
- IC REG BUCK ADJ 6A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,382
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Product details
Overview
LM61460AANRJRR from Texas Instruments is a 3-V to 36-V, 6-A synchronous step-down DC-DC converter in a 4.0 mm × 3.5 mm VQFN-HR (14-pin) package, featuring ±1% output regulation accuracy, 41 mΩ high-side and 21 mΩ low-side MOSFET RDS(ON), and support for 42-V input transients. It delivers regulated power to CPU boards in industrial robots and single-board computers.
For engineers reviewing the LM61460AANRJRR datasheet, LM61460AANRJRR pinout, LM61460AANRJRR application, or LM61460AANRJRR equivalent, key selection considerations include adjustable 200 kHz–2.2 MHz switching frequency, ultra-low EMI HotRod™ layout, auto-mode light-load efficiency (7 µA no-load current), and functional safety documentation support.
Technical Context
The LM61460AANRJRR implements peak-current mode control with integrated high- and low-side MOSFETs, soft recovery from dropout, and frequency foldback below 200 kHz under light load. Its dual VIN pins (VIN1/VIN2) and parallel input path minimize parasitic inductance and switch-node ringing.
Adjustable SW node rise time via RBOOT pin, programmable switching frequency via RT resistor (5.76 kΩ–66.5 kΩ), and external bias (BIAS) input enable optimization for EMI, thermal performance, and efficiency across 1 mA–6 A loads. The device operates over –40°C to +150°C junction temperature with thermal shutdown at 168°C (typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V operating; withstands 42-V transients - simplifies front-end surge protection design |
| Output Current | Up to 6 A continuous - supports high-power CPU and FPGA core rails |
| Output Regulation Accuracy | ±1% total - ensures stable voltage for sensitive digital loads without external trimming |
| Switching Frequency | 200 kHz to 2.2 MHz (adjustable via RT pin) - enables AM-band avoidance or compact magnetics |
| No-Load Quiescent Current | 7 µA (typical at 13.5 VIN, 3.3 VOUT) - extends battery life in always-on industrial systems |
| MOSFET RDS(ON) | HS: 41 mΩ, LS: 21 mΩ (typical) - reduces conduction loss and thermal stress at full load |
| EMI Optimization | HotRod™ VQFN-HR package + parallel input path + adjustable SW rise time - meets CISPR 25 Class 5 without shielding |
Pinout & Package
LM61460AANRJRR uses the VQFN-HR (14-pin) package, 4.0 mm × 3.5 mm body size, with exposed thermal pad for enhanced heat dissipation. Pin numbering follows top-view orientation per Figure 6-1 in SNVSBD5D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS (1) | Bias supply input | Connects to VOUT to improve efficiency; optional 0.1–1 µF capacitor to AGND enhances noise immunity |
| VCC (2) | Internal LDO output | Supplies internal control circuitry; requires 1-µF capacitor to AGND - not for external loading |
| AGND (3) | Analog ground reference | Reference point for FB and VCC; must be connected to both PGND1 and PGND2 on PCB |
| FB (4) | Feedback voltage input | Connects to resistor divider tap; sets output voltage from 1 V to 95% of VIN |
| PGOOD (5) | Open-drain power-good status | Asserts high when output is within ±3% regulation; pulls low during fault or EN = low |
| RT (6) | Frequency setting/resync input | Resistor to GND (5.76–66.5 kΩ) sets fSW; also accepts external sync clock on rising edge |
| EN/SYNC (7) | Enable/synchronization input | Logic-high enables operation; precision UVLO threshold (1.263 V) enables input sequencing |
| VIN1 (8), VIN2 (12) | Dual input power inputs | Parallel paths reduce input loop inductance; each requires local high-quality bypass to respective PGND |
| PGND1 (9), PGND2 (11) | Power ground terminals | Low-side MOSFET return paths; must be low-impedance and joined to AGND at single point |
| SW (10) | Switch node output | Connects directly to inductor; critical for EMI - minimized ringing via HotRod™ layout and RBOOT tuning |
| RBOOT (13) | SW rise-time control | Resistor between RBOOT and CBOOT adjusts dV/dt - 0 Ω gives fastest rise (2.15 ns), 100 Ω slows to 2.7 ns |
| CBOOT (14) | High-side gate driver supply | 100-nF capacitor between CBOOT and SW provides bootstrap charge; internal diode connects to VCC |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low EMI architecture | HotRod™ VQFN-HR package + parallel VIN paths + adjustable SW rise time - eliminates need for metal shielding in automotive/industrial layouts |
| Auto-mode light-load efficiency | 7 µA no-load current + seamless PWM/PFM transition - enables >70% efficiency at 1 mA while maintaining tight regulation |
| Robust transient handling | 42-V absolute max input rating + hiccup short-circuit protection + thermal shutdown at 168°C - sustains operation in harsh industrial environments |
| Flexible frequency control | 200 kHz–2.2 MHz adjustable fSW via RT resistor or external sync clock - supports EMI band avoidance and solution size optimization |
| Functional safety support | Documentation available for ISO 26262 ASIL-B system integration - includes FIT rate, failure modes, and diagnostic coverage analysis |
Applications
| Industrial Robot CPU Board | USB Type-C Power Delivery |
|---|---|
|
Use Scenario: Powers ARM-based application processor and DDR memory on robotic motion controller board with strict EMI limits near motor drivers. IC Role / Device Role / Timing Role: Primary 5-V/3.3-V buck regulator delivering up to 6 A with <2.2-MHz switching to avoid AM-band interference. Use Value: Adjustable SW rise time and HotRod™ layout meet CISPR 25 Class 5 radiated emissions without shielded inductors or ferrites. |
Use Scenario: Generates 5 V, 9 V, 15 V, or 20 V output from variable USB PD source in portable test equipment. IC Role / Device Role / Timing Role: Wide-input (3–36 V), adjustable-output buck converter supporting dynamic voltage scaling per USB PD specification. Use Value: ±1% output accuracy and 0.4-V dropout at 4 A ensure stable bus voltage during high-current charging bursts. |
| Industrial PC Single-Board Computer | Test & Measurement Instrumentation |
|
Use Scenario: Supplies clean, low-noise 12-V and 3.3-V rails to FPGA, ADCs, and communication interfaces in fanless IPC chassis. IC Role / Device Role / Timing Role: Dual-rail power management IC with PGOOD monitoring and thermal derating for unventilated enclosures. Use Value: 7 µA quiescent current and auto-mode extend uptime in battery-backed or energy-harvested deployments. |
Use Scenario: Powers precision analog front-ends and microcontrollers in handheld multimeters and oscilloscope modules. IC Role / Device Role / Timing Role: High-efficiency, low-EMI DC-DC stage converting 24-V field bus to isolated 5-V logic supply. Use Value: 42-V transient tolerance and ±1% regulation eliminate need for upstream TVS or LDO post-regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61440AANRJRR | 4-A rated, identical pinout and feature set except lower current capability and slightly higher RDS(ON) (HS: 48 mΩ, LS: 24 mΩ) | Suitable where peak load ≤ 4 A; smaller thermal footprint but same PCB layout | Select when full 6-A headroom is unnecessary and cost reduction is prioritized |
| LMQ61460RJRR | 6-A rated with integrated input/output capacitors; larger 5-mm × 5.5-mm QFN package; fixed 2.1-MHz fSW | Targeted at space-constrained designs requiring faster time-to-market with reduced external component count | Choose for rapid prototyping or where board area is less critical than BOM count |
Compared with LM61440AANRJRR and LMQ61460RJRR, the LM61460AANRJRR uniquely balances 6-A capability, adjustable frequency, ultra-low EMI, and minimal external components - making it optimal for thermally demanding, EMI-sensitive industrial power rails where layout flexibility and long-term reliability are critical.
Availability
LM61460AANRJRR is available at Aetrix Electronics and suitable for industrial robot CPU boards, USB Type-C power delivery systems, and test & measurement instrumentation requiring stable component supply, long-lifecycle support, and consistent parametric performance across temperature extremes.
Supply support for LM61460AANRJRR 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 industrial and automotive power solutions.
The LM61460AANRJRR belongs to TI's LM61xx family of low-EMI, wide-input synchronous buck converters, designed specifically for rugged industrial applications requiring robust transient response, functional safety readiness, and minimal EMI mitigation overhead.
FAQ
What is the maximum input voltage the LM61460AANRJRR can withstand?
The LM61460AANRJRR has an absolute maximum input voltage rating of 42 V across VIN1 and VIN2 pins, enabling reliable operation during automotive load-dump or industrial 24-V rail transients without external clamping. Its recommended operating range remains 3.0 V to 36 V, and sustained operation above 36 V is not specified for continuous use.
Does the LM61460AANRJRR support synchronization to an external clock?
Yes, the LM61460AANRJRR supports external clock synchronization via its EN/SYNC pin, which accepts rising-edge-triggered signals from 200 kHz to 2.2 MHz. When synchronized, the device operates in forced PWM mode and disables auto-mode frequency foldback - ensuring deterministic timing for noise-sensitive systems like data acquisition or RF subsystems.
How does the RBOOT pin affect EMI performance of the LM61460AANRJRR?
The RBOOT pin on the LM61460AANRJRR allows adjustment of the SW node rise time by placing a resistor between RBOOT and CBOOT. A 0-Ω connection yields ~2.15 ns rise time for highest efficiency; adding 100 Ω increases rise time to ~2.7 ns, reducing high-frequency harmonics and radiated EMI - a key tuning parameter for passing CISPR 25 Class 5 without layout changes.
What is the purpose of the BIAS pin on the LM61460AANRJRR?
The BIAS pin on the LM61460AANRJRR supplies the internal LDO that powers control circuitry. Connecting BIAS to VOUT improves conversion efficiency by reducing internal LDO dropout losses. For outputs above 12 V, BIAS must be tied to AGND; for lower outputs, a 0.1–1 µF capacitor from BIAS to AGND enhances noise immunity and stability.
Can the LM61460AANRJRR operate with only one input voltage source connected?
Yes, the LM61460AANRJRR can operate with only VIN1 or only VIN2 connected, provided the unconnected pin is tied to the same potential as the active input (e.g., shorted together). However, optimal EMI performance and current sharing require both VIN1 and VIN2 to be independently bypassed to their respective PGND pins using low-ESR capacitors - leveraging the parallel input path as intended in the HotRod™ layout.
LM61460AANRJRR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerVFQFN
- 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):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 34V
- Current - Output:
- 6A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 14-VQFN-HR (4x3.5)
LM61460AANRJRR FAQ
1.How can I place an order for LM61460AANRJRR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61460AANRJRR 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 LM61460AANRJRR reliable?
The price and inventory of LM61460AANRJRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61460AANRJRR is usually 5 days.
3.What payment methods are accepted for LM61460AANRJRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61460AANRJRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61460AANRJRR?
LM61460AANRJRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61460AANRJRR 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 LM61460AANRJRR?
For technical support, including LM61460AANRJRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61460AANRJRR requirements.
6.How does Aetrix verify that LM61460AANRJRR is sourced from the original manufacturer or authorized distributors?
All LM61460AANRJRR 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 LM61460AANRJRR meets industry standards.
7.What is the process for return or replacement of LM61460AANRJRR?
All LM61460AANRJRR units undergo pre-shipment inspection (PSI). If there is an issue with LM61460AANRJRR, 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 LM61460AANRJRR part is unused and in its original packaging.
Return procedure for LM61460AANRJRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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