My Inquiry
My Account
Texas Instruments LM46001AQPWPRQ1
- Part No.:
- LM46001AQPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM46001AQPWPRQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,744
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM46001AQPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified synchronous step-down DC-DC converter delivering up to 1 A output current across a 3.5 V to 60 V input range, with 1.016 V feedback reference (±1.4% over –40°C to +125°C), 24 µA operating quiescent current, and integrated high-side/low-side MOSFETs (RDS(on) = 419 mΩ / 231 mΩ). It powers automotive sub-AM band 12 V/24 V systems requiring robust EMI performance and PFM efficiency at light load.
For engineers reviewing the LM46001AQPWPRQ1 datasheet, LM46001AQPWPRQ1 pinout, LM46001AQPWPRQ1 application, or LM46001AQPWPRQ1 equivalent, key selection criteria include its 200 kHz–2.2 MHz adjustable switching frequency, precision enable threshold (2.1 V ±0.22 V), power-good flag with 6% hysteresis, and HTSSOP-16 thermal pad package optimized for automotive thermal cycling and EN55022 Class B radiated emissions compliance.
Technical Context
The LM46001AQPWPRQ1 uses peak current mode control with internal compensation, enabling stable operation with ceramic, polymer, tantalum, or aluminum output capacitors without external loop components. Its DCM and PFM modes reduce switching losses below ~100 mA load, achieving >90% efficiency at 10 mA with 24 V input and 3.3 V output.
It integrates cycle-by-cycle current limiting (peak 2.45 A, valley 1.1 A), hiccup-mode short-circuit protection, thermal shutdown at 160°C, and precision enable with 305 mV hysteresis-enabling reliable cold-crank operation in automotive environments where input can dip to 3.5 V while maintaining regulated output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 60 V - supports automotive battery transients including cold-crank (down to 3.5 V) and load-dump (up to 60 V). |
| Output Current | 1 A continuous - sufficient for powering infotainment SoCs, ADAS sensors, and gateway MCUs from wide-VIN rails. |
| Feedback Reference | 1.016 V ±1.4% - enables precise output regulation from 1 V to 28 V using standard resistor dividers. |
| Quiescent Current | 24 µA in switching mode - extends battery life in always-on automotive modules (e.g., telematics, body control units). |
| Switching Frequency | 200 kHz to 2.2 MHz (adjustable via RT pin) - allows layout optimization: higher frequencies shrink inductors; lower frequencies improve light-load efficiency. |
| EMI Compliance | Tested to EN55022/CISPR 22 Class B - meets automotive OEM radiated emission requirements without added filtering on typical layouts. |
| Thermal Protection | 160°C shutdown with 150°C recovery - prevents damage during sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
LM46001AQPWPRQ1 is housed in a thermally enhanced 16-pin HTSSOP (PWP) package (6.6 mm × 5.1 mm × 1.2 mm, 0.65 mm pitch) with exposed thermal pad connected internally to AGND. The package supports ≤39.9°C/W junction-to-ambient thermal resistance on a 4-layer PCB with proper copper pour under the pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1,2) | Switch node | Connects to inductor; carries high di/dt switching current - requires shortest possible trace to minimize EMI and voltage spikes. |
| CBOOT (3) | Bootstrap capacitor connection | Supplies gate drive for high-side FET; requires 470 nF X7R capacitor between CBOOT and SW for reliable bootstrapping. |
| VCC (4) | Internal LDO output | Bypass with 1–10 µF capacitor to AGND; no external load permitted - powers internal logic and gate drivers. |
| BIAS (5) | Optional LDO input | Tie to VOUT (if 3.3 V ≤ VOUT ≤ 28 V) to reduce power loss; tie to ground if VOUT < 3.3 V - improves efficiency by bypassing VIN-to-VCC conversion. |
| SYNC (6) | External clock input | Accepts 200 kHz–2.2 MHz square wave; enables synchronization to system clock to avoid beat frequencies in multi-rail designs. |
| RT (7) | Frequency programming | Resistor to AGND sets frequency: 0 Ω = 500 kHz default; 100 kΩ ≈ 200 kHz; 10 kΩ ≈ 2.2 MHz - tolerance impacts accuracy by ±10%. |
| PGOOD (8) | Open-drain power-good flag | Asserts high when VOUT is within ±7% of target; requires 10–100 kΩ pull-up to ≤12 V rail - used for sequencing and fault monitoring. |
| FB (9) | Feedback sense input | High-impedance input (leakage <65 nA); connects to resistor divider midpoint - determines output voltage via VOUT = VFB × (1 + RFBT/RFBB). |
| AGND (10) | Analog ground reference | Reference for FB, SS/TRK, EN, and internal references - must connect to low-noise system ground plane, separate from PGND until single-point tie. |
| SS/TRK (11) | Soft-start/tracking control | Internal 4.1 ms soft-start when floating; add capacitor for longer ramp; apply external voltage ramp for output tracking in multi-rail systems. |
| EN (12) | Enable input | Logic-level control: ≥2.1 V enables regulator; ≤1.8 V disables - precision threshold enables programmable UVLO for system brownout protection. |
| VIN (13,14) | Main input supply | Connects to high-frequency input capacitor (CIN) and power source - dual pins reduce IR drop and improve current handling. |
| PGND (15,16) | Power ground return | Low-side FET source connection; ties to CIN, COUT, and inductor ground - must be short, low-inductance path to minimize switching noise. |
| PAD | Exposed thermal pad | Internally connected to AGND; soldered to large PCB copper area for heat dissipation - mandatory for thermal reliability in 1 A operation. |
Key Features
| Feature | Design Value |
|---|---|
| PFM/DCM Light-Load Mode | Reduces switching frequency below ~100 mA, cutting quiescent current to 24 µA and maintaining >85% efficiency at 10 mA load. |
| Internal Compensation | Eliminates need for external Type II/III compensation network - reduces BOM count and layout sensitivity while ensuring stability across capacitor types. |
| Pre-Biased Soft Start | Allows safe startup into pre-charged output (e.g., hot-swap or backup rail) without reverse current flow or output overshoot. |
| Output Voltage Tracking | SS/TRK pin accepts external ramp to coordinate power-up sequence with other rails - critical for FPGA, DDR, and multi-core SoC applications. |
| Integrated Power-Good Flag | PGOOD provides system-level status with 220 µs deglitching - enables reliable power sequencing and fault detection without external comparators. |
| AEC-Q100 Grade 1 Qualification | Validated for –40°C to +125°C junction temperature - ensures long-term reliability in engine bay, head unit, and ADAS camera modules. |
Applications
| Automotive Infotainment Power | Telematics Control Unit (TCU) |
|---|---|
|
Use Scenario: Powers DSP, audio codec, and display interface in head-unit systems with 12 V battery input subject to cold-crank and load-dump events. IC Role / Device Role / Timing Role: Primary 3.3 V/5 V point-of-load regulator with precision enable for controlled wake-up and PGOOD for system readiness signaling. Use Value: Maintains regulation down to 3.5 V input during cranking; achieves >92% efficiency at 500 mA, reducing thermal load in sealed enclosures. |
Use Scenario: Supplies 5 V to LTE modem, GNSS receiver, and CAN transceiver in vehicle connectivity modules requiring always-on low-power operation. IC Role / Device Role / Timing Role: Wide-VIN buck converter with 24 µA quiescent current and programmable enable threshold for battery-backed sleep/wake control. Use Value: Extends backup battery life beyond 30 days in sleep mode; synchronizes switching to system clock to suppress conducted EMI in sensitive RF sections. |
| Commercial Vehicle Gateway | ADAS Camera Module |
|
Use Scenario: Generates 5 V and 3.3 V rails for ARM-based gateway MCU, Ethernet PHY, and multiple CAN FD interfaces in heavy-duty truck ECUs. IC Role / Device Role / Timing Role: High-reliability synchronous buck with hiccup-mode short-circuit protection and thermal shutdown for unattended operation in harsh environments. Use Value: Survives 60 V load-dump transients per ISO 7637-2; delivers full 1 A output continuously at 85°C ambient with minimal derating. |
Use Scenario: Provides clean, low-noise 1.2 V core and 2.8 V I/O supplies to image sensor and ISP in rear-view or surround-view cameras mounted near engine heat sources. IC Role / Device Role / Timing Role: Thermally robust buck converter with internal soft-start and output tracking to coordinate with sensor reset timing. Use Value: Stable operation up to 125°C junction temperature; <1.5% output voltage drift over temperature ensures consistent image sensor biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM46002AQPWPRQ1 | 2 A output current, identical pinout and feature set; higher RDS(on) (HS: 220 mΩ, LS: 110 mΩ) but same thermal footprint. | Suitable for higher-current loads (e.g., radar SoCs, multi-camera hubs) without PCB redesign - shares same layout and external component values. | Select when future-proofing for >1 A peak loads or paralleling for redundancy; maintains identical control interface and qualification. |
| LM43603QPWPRQ1 | 3.5 V–36 V input, 3 A output, HTSSOP-16 pin-compatible; lacks PFM mode and has higher 45 µA IQ. | Better suited for 24 V commercial vehicle systems with lower max input voltage; not rated for 60 V transients or extended temperature range. | Choose for cost-sensitive 24 V-only applications where 60 V capability and ultra-low IQ are unnecessary - avoids over-specifying voltage rating. |
Compared with LM46002AQPWPRQ1 and LM43603QPWPRQ1, the LM46001AQPWPRQ1 offers optimal balance of 1 A capability, 60 V ruggedness, and 24 µA light-load IQ - making it the preferred choice for space-constrained automotive modules where thermal management and battery longevity are critical.
Availability
LM46001AQPWPRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, telematics control units, and ADAS camera modules requiring stable component supply with AEC-Q100 qualification and long-term production support.
Supply support for LM46001AQPWPRQ1 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 ICs, with deep expertise in automotive-grade reliability and functional safety.
The LM46001-Q1 family was designed specifically for automotive power conversion - emphasizing wide input range, low IQ, EMI robustness, and AEC-Q100 qualification to meet stringent OEM requirements for body electronics, infotainment, and driver-assistance systems.
FAQ
What is the maximum input voltage rating for LM46001AQPWPRQ1?
The LM46001AQPWPRQ1 has an absolute maximum input voltage rating of 65 V, with recommended operation up to 60 V. This rating enables robust handling of ISO 7637-2 load-dump transients common in 12 V and 24 V automotive systems, ensuring reliable operation without external clamping circuitry in most implementations.
Does LM46001AQPWPRQ1 support output voltage tracking?
Yes, LM46001AQPWPRQ1 supports output voltage tracking via the SS/TRK pin. When an external voltage ramp is applied to this pin, the output follows the ramp with unity gain, enabling coordinated power-up sequencing with other rails - essential for FPGA, DDR memory, and multi-core SoC applications where strict voltage ordering is required.
How does the PFM mode in LM46001AQPWPRQ1 improve light-load efficiency?
The LM46001AQPWPRQ1 automatically enters PFM mode below ~100 mA load, reducing switching frequency and gate drive losses. This cuts operating quiescent current to 24 µA and maintains >85% efficiency at 10 mA output - significantly extending battery life in always-on automotive modules like telematics and body control units.
What thermal performance can be expected from LM46001AQPWPRQ1 in a typical automotive layout?
In a standard 4-layer PCB layout with 2 oz copper and a 200 mm² thermal pad copper pour, LM46001AQPWPRQ1 achieves ≤39.9°C/W junction-to-ambient thermal resistance. At 1 A output and 24 V input, this results in ~40°C junction rise above ambient - well within the –40°C to +125°C AEC-Q100 Grade 1 specification.
Is LM46001AQPWPRQ1 pin-compatible with other devices in the LM4600x-Q1 family?
Yes, LM46001AQPWPRQ1 is pin-to-pin compatible with LM46002AQPWPRQ1 (2 A) and LM46000QPWPRQ1 (0.5 A) in the same HTSSOP-16 package. This allows scalable power design - upgrading current capability without changing PCB layout, BOM, or firmware control logic.
LM46001AQPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- 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):
- 3.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 1A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
LM46001AQPWPRQ1 FAQ
1.How can I place an order for LM46001AQPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM46001AQPWPRQ1 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 LM46001AQPWPRQ1 reliable?
The price and inventory of LM46001AQPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM46001AQPWPRQ1 is usually 5 days.
3.What payment methods are accepted for LM46001AQPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM46001AQPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM46001AQPWPRQ1?
LM46001AQPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM46001AQPWPRQ1 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 LM46001AQPWPRQ1?
For technical support, including LM46001AQPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM46001AQPWPRQ1 requirements.
6.How does Aetrix verify that LM46001AQPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All LM46001AQPWPRQ1 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 LM46001AQPWPRQ1 meets industry standards.
7.What is the process for return or replacement of LM46001AQPWPRQ1?
All LM46001AQPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM46001AQPWPRQ1, 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 LM46001AQPWPRQ1 part is unused and in its original packaging.
Return procedure for LM46001AQPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM46001AQPWPRQ1 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…
