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Texas Instruments LM2623QNHLRQ1
- Part No.:
- LM2623QNHLRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LM2623QNHLRQ1.pdf
- Description:
- IC REG BOOST ADJ 2.85A 14WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2623QNHLRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified DC-DC boost converter IC with integrated 0.17-Ω N-channel MOSFET, 1.1-V start-up capability, 0.9–14-V input range, and adjustable 1.24–14-V output voltage - used in camera, radar, and GPS power rails requiring high efficiency at ultra-low input voltages.
For engineers reviewing the LM2623QNHLRQ1 datasheet, LM2623QNHLRQ1 pinout, LM2623QNHLRQ1 application, or LM2623QNHLRQ1 equivalent, key selection criteria include gated-oscillator PFM operation, ratio-adaptive duty-cycle programming via R/C on FREQ/BOOT pins, thermal shutdown at ~160°C, and WSON-14 package compatibility with automotive PCB layout constraints.
Technical Context
The LM2623QNHLRQ1 implements a gated-oscillator architecture using pulse frequency modulation (PFM) for on/off regulation - skipping switching cycles when output reaches regulation limit to maintain efficiency across wide load ranges (10 mA to 2 A). Its internal oscillator frequency (300 kHz to 2 MHz) and duty cycle (17% to 90%) are programmable via external resistor on FREQ pin and capacitor on BOOT pin.
It features cycle-by-cycle current limiting (2.85 A typical), thermal shutdown (~160°C), and dual ground separation (PGND for power paths, SGND for signal reference) to minimize noise coupling. The device starts from 1.1 V and sustains operation down to 0.9 V by bootstrapping VDD from output voltage through internal charge pump circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.9 V to 14 V - supports direct battery connection including cold-crank conditions in automotive systems |
| Start-Up Voltage | 1.1 V - enables reliable power-up from partially discharged 12-V lead-acid or LiFePO₄ batteries |
| Output Voltage Range | 1.24 V to 14 V - adjustable via external resistive divider on FB pin for flexible rail generation |
| Switching Frequency | 300 kHz to 2 MHz - selectable via external resistor on FREQ pin to optimize size vs EMI trade-offs |
| Internal MOSFET RDS(on) | 0.17 Ω (typical at 25°C) - reduces conduction loss and enables >90% peak efficiency at mid-load |
| Quiescent Current | 80 µA (typical into VDD) - minimizes standby power draw in always-on automotive modules |
| Shutdown Current | <2.5 µA - extends battery life during vehicle sleep mode without external load switches |
| Operating Junction Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and ADAS ECU deployment |
Pinout & Package
LM2623QNHLRQ1 uses a thermally enhanced 4.00 mm × 4.00 mm WSON-14 package with exposed DAP for PCB-level heat dissipation. Power ground (PGND) and switch (SW) pins are duplicated for low-inductance routing; DAP must remain electrically isolated and soldered to thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | NC | No-connect terminals - must be left floating or tied to PGND only if required by board mechanical constraints |
| 2, 3 | PGND | Power ground return path for SW node and internal MOSFET - shorted together externally to minimize ground bounce |
| 4 | EN | Active-low enable input - pulls below 0.15×VDD to enter shutdown; above 0.7×VDD for normal operation |
| 5 | FREQ | Frequency programming node - resistor from VIN sets oscillator frequency (300 kHz–2 MHz) |
| 6 | FB | Feedback input - senses output voltage via resistive divider; regulates to 1.24 V reference |
| 9 | SGND | Signal ground reference for FB, EN, FREQ - separated from PGND to avoid noise injection into control loop |
| 10 | VDD | Internal circuit supply - bootstrapped from output; requires 3–5 V stable input for proper biasing |
| 11 | BOOT | Bootstrap supply for high-side gate drive - capacitor between BOOT and SW generates gate voltage for internal MOSFET |
| 12, 13 | SW | Switch node - drain of internal N-MOSFET; connects to inductor and Schottky diode anode |
| DAP | Thermal pad | Exposed die attach pad - must be soldered to large copper pour for thermal management; electrically isolated |
Key Features
| Feature | Design Value |
|---|---|
| Gated-oscillator PFM control | Enables >87% efficiency from 10 mA to 600 mA loads without external compensation components |
| Ratio-adaptive duty-cycle programming | Uses C3 capacitor on BOOT pin to dynamically adjust duty cycle vs input/output voltage ratio - reduces output ripple |
| Low-voltage start-up | Operates from 1.1-V input and sustains regulation down to 0.9 V - eliminates need for pre-bias circuits in battery systems |
| Integrated protection | Includes cycle-by-cycle current limit (2.85 A typ), thermal shutdown (~160°C), and HBM/CDM ESD rating per AEC-Q100 |
| Automotive-grade packaging | WSON-14 with 4 mm × 4 mm footprint and exposed DAP - meets IPC/JEDEC J-STD-020 moisture sensitivity level 2a |
| Separate PGND/SGND | Reduces noise coupling between high-current switching paths and analog feedback circuitry - improves regulation stability |
Applications
| Automotive Camera Power Supply | Automotive Radar Transceiver Bias |
|---|---|
|
Use Scenario: Powers image sensor and ISP in rear-view or surround-view cameras operating from 12-V battery with cold-crank dips to 6 V. IC Role / Device Role / Timing Role: Step-up regulator generating stable 3.3-V or 5-V rail from variable battery input; provides regulated bias for CMOS image sensors and SerDes interfaces. Use Value: Maintains camera functionality during engine cranking due to 1.1-V start-up and 0.9-V dropout; low 80-µA quiescent current preserves battery during parking mode. |
Use Scenario: Supplies 5-V or 12-V bias to RF transceivers and ADCs in 77-GHz radar modules mounted near engine compartments. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering clean, ripple-free power to sensitive RF front-end stages and high-speed data converters. Use Value: Dual ground isolation (PGND/SGND) and gated-oscillator PFM reduce switching noise coupling into RF receive paths - critical for SNR preservation. |
| Automotive GPS/GLONASS Module | Flash Memory Programming Voltage |
|
Use Scenario: Generates 3.3-V or 5-V rail for GNSS receivers and baseband processors in telematics control units exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Automotive-qualified DC-DC converter providing stable supply under –40°C to +125°C ambient conditions with minimal thermal derating. Use Value: AEC-Q100 Grade 1 qualification and 125°C junction rating ensure uninterrupted satellite lock acquisition and position calculation in extreme under-hood environments. |
Use Scenario: Provides programmable 12-V or 13-V programming voltage for automotive-grade NOR/NAND flash memory during firmware updates or calibration writes. IC Role / Device Role / Timing Role: Adjustable-output boost converter delivering precise, well-regulated high-voltage programming pulses with fast transient response. Use Value: Output voltage set via external resistor divider ensures accurate programming voltage tolerance (±1.5% over temp); internal current limit prevents over-stress during write cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2735YQSDX/NOPB | Fixed 5-V output; no FREQ/BOOT programmability; higher 1.25-V start-up; 1.5-A max output | Limited to fixed-rail applications; less suitable for multi-voltage systems or dynamic load optimization | Select when system requires simple, cost-optimized 5-V boost with no tuning needed |
| TPS61230AQDRCRQ1 | Higher 2.2-A output; integrated soft-start; 0.65-V start-up; 2.5-MHz max frequency; different pinout | Better suited for high-current, low-noise applications but requires PCB redesign due to non-pin-compatible layout | Choose for next-gen designs needing lower start-up voltage and higher current headroom - not drop-in replacement |
Compared with LM2623QNHLRQ1, LM2735YQSDX/NOPB offers simpler implementation but sacrifices programmability and low-voltage start-up, while TPS61230AQDRCRQ1 delivers superior performance at the cost of layout incompatibility and increased BOM complexity.
Availability
LM2623QNHLRQ1 is available at Aetrix Electronics and suitable for automotive camera modules, radar transceivers, and GPS navigation systems requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for LM2623QNHLRQ1 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 automotive, industrial, and communications markets.
The LM2623QNHLRQ1 belongs to TI's automotive-qualified DC-DC boost converter product line, designed specifically for low-input-voltage, high-reliability power conversion in ADAS, infotainment, and body electronics systems.
FAQ
What is the minimum input voltage required for LM2623QNHLRQ1 to start switching?
The LM2623QNHLRQ1 has a guaranteed start-up voltage of 1.1 V at 25°C. It begins continuous switching until the output reaches ~3 V, after which the gated-oscillator feedback loop takes over. Once started, it continues regulating down to 0.9 V input due to VDD bootstrapping from the output rail - making LM2623QNHLRQ1 suitable for deep battery discharge scenarios in automotive systems.
How does the LM2623QNHLRQ1 achieve high efficiency across wide load ranges?
The LM2623QNHLRQ1 uses pulse frequency modulation (PFM) with gated-oscillator control - skipping entire switching cycles when regulation is met rather than reducing duty cycle. This avoids light-load inefficiencies common in PWM converters. Combined with its 80-µA quiescent current and low 0.17-Ω MOSFET RDS(on), LM2623QNHLRQ1 maintains >87% efficiency from 10 mA to 600 mA loads without external compensation.
Can the LM2623QNHLRQ1 be used with ceramic output capacitors instead of tantalum?
Yes - the LM2623QNHLRQ1 supports low-ESR ceramic output capacitors. The datasheet specifies a 100-µF tantalum capacitor in the typical application, but ceramic alternatives (e.g., 47 µF X7R in parallel with 10 µF X5R) are viable if total capacitance and effective series resistance meet stability requirements. Layout must minimize loop inductance, especially for SW-to-COUT paths, to prevent voltage spikes that could stress LM2623QNHLRQ1's 14.5-V absolute maximum SW rating.
What is the function of the C3 capacitor connected to the BOOT pin of LM2623QNHLRQ1?
The C3 capacitor on the BOOT pin enables ratio-adaptive duty-cycle programming - adjusting conduction time based on input-to-output voltage ratio to minimize output ripple and improve efficiency. Its value (e.g., 4.7 pF in typical application) is selected empirically per AN-1221; increasing C3 raises duty cycle, decreasing it lowers duty cycle. Incorrect C3 values may cause premature current-limit triggering or double-pulsing, destabilizing LM2623QNHLRQ1 output regulation.
Is the LM2623QNHLRQ1 pin-compatible with standard LM2623 variants?
No - LM2623QNHLRQ1 uses the NHL (WSON-14) package with specific pin assignments including duplicated PGND (pins 2,3) and SW (pins 12,13), NC pins (1,7,8,14), and separate SGND (pin 9). Standard LM2623 variants use SOIC-8 or MSOP-8 packages with entirely different pin counts and functions. Migration requires full PCB redesign; LM2623QNHLRQ1 is not a drop-in replacement for non-Q1 or non-WSON versions.
LM2623QNHLRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.9V
- Voltage - Input (Max):
- 14V
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 14V
- Current - Output:
- 2.85A (Switch)
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-WSON (4x4)
LM2623QNHLRQ1 FAQ
1.How can I place an order for LM2623QNHLRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2623QNHLRQ1 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 LM2623QNHLRQ1 reliable?
The price and inventory of LM2623QNHLRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2623QNHLRQ1 is usually 5 days.
3.What payment methods are accepted for LM2623QNHLRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2623QNHLRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2623QNHLRQ1?
LM2623QNHLRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2623QNHLRQ1 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 LM2623QNHLRQ1?
For technical support, including LM2623QNHLRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2623QNHLRQ1 requirements.
6.How does Aetrix verify that LM2623QNHLRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2623QNHLRQ1 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 LM2623QNHLRQ1 meets industry standards.
7.What is the process for return or replacement of LM2623QNHLRQ1?
All LM2623QNHLRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2623QNHLRQ1, 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 LM2623QNHLRQ1 part is unused and in its original packaging.
Return procedure for LM2623QNHLRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2623QNHLRQ1 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
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