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Texas Instruments LM2623QNHLTQ1
- Part No.:
- LM2623QNHLTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LM2623QNHLTQ1.pdf
- Description:
- IC REG BOOST ADJ 2.85A 14WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,126
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Product details
Overview
LM2623QNHLTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified DC-DC boost converter IC with integrated 0.17-Ω N-channel MOSFET, operating from 0.9 V to 14 V input and delivering adjustable 1.24 V to 14 V output up to 2 A, featuring gated-oscillator PFM control, 1.1-V start-up, and 4-mm × 4-mm WSON-14 package. It enables compact, high-efficiency power conversion in space-constrained automotive camera and radar modules.
For engineers reviewing the LM2623QNHLTQ1 datasheet, LM2623QNHLTQ1 pinout, LM2623QNHLTQ1 application, or LM2623QNHLTQ1 equivalent, key selection criteria include its 2-MHz programmable switching frequency, cycle-by-cycle current limit (2.85 A typ), thermal shutdown at ~160°C, and low 80-µA operating quiescent current - all validated for –40°C to 125°C ambient operation.
Technical Context
The LM2623QNHLTQ1 implements a gated-oscillator architecture with pulse-frequency modulation (PFM) regulation, enabling high efficiency across wide load ranges by skipping switching cycles when regulation is met. Its internal oscillator frequency (300 kHz–2 MHz) and duty cycle (17%–90%) are externally programmable via resistor (FREQ pin) and capacitor (C3) networks.
It integrates cycle-by-cycle overcurrent protection (2.85 A typical), thermal shutdown (~160°C), and ultra-low shutdown current (<2.5 µA). The device supports bootstrap-powered VDD operation down to 0.9 V after start-up, with FB pin reference voltage fixed at 1.24 V ±3% over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.9 V to 14 V - supports direct battery connection including cold-crank (≥0.9 V post-start-up) and wide automotive supply variation |
| Output Voltage Range | 1.24 V to 14 V - adjustable via external resistive divider; 1.24 V FB reference enables precise regulation |
| Switching Frequency | 300 kHz to 2 MHz - programmable with external resistor; higher frequencies allow smaller magnetics and capacitors |
| Peak Switch Current Limit | 2.85 A typical - protects internal MOSFET during overload or short-circuit without external sensing |
| Quiescent Current | 80 µA typical - minimizes standby power loss in always-on automotive subsystems |
| Shutdown Current | <2.5 µA - extends battery life in sleep-mode applications such as parking cameras |
| Start-Up Voltage | 1.1 V - enables reliable boot from depleted 12-V battery or single-cell LiFePO₄ sources |
| MOSFET RDS(on) | 0.17 Ω - reduces conduction loss and improves full-load efficiency up to 90% |
Pinout & Package
LM2623QNHLTQ1 uses a thermally enhanced 4.00 mm × 4.00 mm WSON-14 package with exposed DAP (die attach pad) for improved heat dissipation. The package features dual PGND (pins 2,3) and dual SW (pins 12,13) terminals to reduce parasitic inductance in high-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | NC | No-connect pins - must remain unconnected per datasheet; no internal function or bonding |
| 2, 3 | PGND | Power ground - low-impedance return path for switch current; pins must be shorted together on PCB |
| 4 | EN | Active-low enable - logic low (<0.15×VDD) disables regulator and reduces IQ to <2.5 µA |
| 5 | FREQ | Frequency adjust - sets oscillator frequency via external resistor to VIN; enables 300 kHz–2 MHz tuning |
| 6 | FB | Feedback input - monitors output voltage via resistive divider; regulates to 1.24 V reference |
| 9 | SGND | Signal ground - isolated reference for analog circuitry; separate from PGND to minimize noise coupling |
| 10 | VDD | Internal supply - powers control circuitry; can be bootstrapped from output to sustain operation below 0.9 V input |
| 11 | BOOT | Bootstrap supply - charges gate drive capacitor for internal N-MOSFET; requires external 1-µF ceramic capacitor |
| 12, 13 | SW | Switch node - drain of internal MOSFET; high di/dt path requiring minimized loop area and tight PGND routing |
| DAP | Thermal pad | Exposed die attach pad - must be soldered to PCB copper pour for thermal management; electrically isolated/floating |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation with HBM ±2 kV and CDM ±500 V ESD robustness |
| Gated-oscillator PFM control | Delivers >87% efficiency at light loads (200 mA) and full loads (500 mA) without external compensation |
| Programmable frequency & duty cycle | Enables optimization of ripple, size, and efficiency via R-FREQ and C3 - no loop compensation required |
| Integrated 0.17-Ω MOSFET | Eliminates external high-side switch; reduces BOM count and layout complexity in boost topologies |
| Low 1.1-V start-up voltage | Supports direct connection to partially discharged 12-V battery or single-cell LiFePO₄ (2.5–3.6 V) |
| Thermal and current protection | Auto-recovery thermal shutdown (~160°C) and cycle-by-cycle current limiting prevent damage under fault conditions |
Applications
| Automotive Camera Power Supply | Automotive Radar Sensor Bias |
|---|---|
Use Scenario: Powers image sensor and ISP in rear-view or surround-view camera modules requiring stable 3.3 V or 5 V from 9–16 V vehicle battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary step-up regulator providing regulated bias voltage; manages dynamic load transients during frame capture bursts. Use Value: 87% efficiency at 200 mA ensures minimal self-heating in sealed camera housings; 1.1-V start-up guarantees operation during engine cranking. | Use Scenario: Supplies clean, low-noise 5 V or 12 V to RF transceivers and MMICs in 77-GHz radar front-ends where EMI sensitivity is critical. IC Role / Device Role / Timing Role: High-frequency (2 MHz) boost converter minimizing inductor size while maintaining tight output regulation under pulsed RF load. Use Value: Programmable frequency avoids interference with radar chirp bands; low output ripple (<10 mVPP) prevents phase noise degradation. |
| Automotive GPS Module Supply | Flash Memory Programming Voltage |
Use Scenario: Generates 3.3 V for GNSS receivers and baseband processors in telematics units, operating continuously during vehicle ignition-off (accessory mode). IC Role / Device Role / Timing Role: Always-on power rail with ultra-low shutdown current ensuring GPS hot-start capability after extended parking. Use Value: <2.5 µA shutdown IQ preserves battery charge over weeks; WSON package enables compact placement near antenna module. | Use Scenario: Provides 12 V programming voltage for automotive-grade NOR/NAND flash memory used in ADAS ECUs and infotainment systems. IC Role / Device Role / Timing Role: Temporary high-voltage rail activated only during firmware update; requires precise 12 V regulation and fast transient response. Use Value: Adjustable output (1.24–14 V) allows exact match to flash VPP spec; 2.85 A current limit prevents damage during write-cycle surge currents. |
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; 1.6-MHz switching; lower 1.5-A current limit; no FREQ pin adjustment | Suitable for cost-sensitive, fixed-output automotive sensors but lacks programmability for multi-rail systems | Select when output voltage is fixed and board space is constrained - same WSON-8 package but fewer pins |
| TPS61236RGET | Higher 3.2-A current limit; 2.5-MHz max frequency; integrated soft-start; no thermal shutdown flag | Better for high-current radar transceivers needing faster transient response, but lacks AEC-Q100 Grade 1 certification | Choose for non-safety-critical high-power applications where thermal monitoring is handled externally |
Compared with LM2623QNHLTQ1, LM2735YQSDX/NOPB offers smaller footprint and lower cost for fixed 5-V rails but sacrifices design flexibility and current capability, while TPS61236RGET delivers higher peak current and speed at the expense of automotive qualification and integrated protection features.
Availability
LM2623QNHLTQ1 is available at Aetrix Electronics and suitable for automotive camera modules, radar sensor bias supplies, and GPS receiver power rails requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for LM2623QNHLTQ1 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 automotive power management and signal chain solutions.
The LM2623-Q1 product line delivers high-efficiency, AEC-Q100-qualified boost converters for automotive vision, radar, and infotainment systems where reliability, low IQ, and wide input range are critical.
FAQ
What is the minimum input voltage required for LM2623QNHLTQ1 to start switching?
The LM2623QNHLTQ1 has a guaranteed 1.1-V start-up voltage. At this level, the internal circuitry begins continuous switching until the output reaches ~3 V, after which the gated-oscillator feedback loop takes over. Once operational, it sustains regulation down to 0.9 V input due to VDD bootstrapping from the output. This behavior is confirmed across –40°C to 125°C ambient per AEC-Q100 Grade 1 testing.
Can LM2623QNHLTQ1 be used in a non-automotive application?
Yes, LM2623QNHLTQ1 functions as a general-purpose boost converter outside automotive contexts, but its AEC-Q100 qualification, thermal specs, and ESD ratings are optimized for vehicular environments. For industrial or consumer use, consider cost-optimized variants like LM2623MM/NOPB - however, LM2623QNHLTQ1 remains fully functional and benefits from tighter parametric limits and extended temperature validation.
How is the output voltage set on LM2623QNHLTQ1?
The output voltage of LM2623QNHLTQ1 is set using an external resistive divider connected to the FB pin. With a fixed 1.24-V internal reference, RF1 = RF2 × [(VOUT / 1.24) − 1]. TI recommends RF2 between 50 kΩ and 100 kΩ for optimal noise immunity and bias current balance. This configuration is validated for outputs from 1.24 V to 14 V and appears in all official LM2623QNHLTQ1 reference designs.
Does LM2623QNHLTQ1 require an external Schottky diode?
Yes, LM2623QNHLTQ1 requires an external Schottky diode (e.g., 3-A rated) connected between SW and VOUT. The IC integrates only the N-channel MOSFET switch; the diode completes the boost topology's current path during switch-off. Standard rectifier diodes are unsuitable due to slow recovery causing efficiency loss and instability - this requirement is explicitly stated in Section 8.2.2.6 of the LM2623QNHLTQ1 datasheet.
What thermal management is required for LM2623QNHLTQ1 at full load?
At full 2-A load and 125°C ambient, LM2623QNHLTQ1 requires the DAP (exposed thermal pad) to be soldered to a minimum 200 mm² copper pour with ≥4 thermal vias to inner/ground layers. The datasheet specifies RθJA = 37.6°C/W for the WSON-14 package; without proper DAP connection, junction temperature may exceed 150°C, triggering thermal shutdown. Layout Example Figure 12 in the LM2623QNHLTQ1 datasheet shows verified implementation.
LM2623QNHLTQ1 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)
LM2623QNHLTQ1 FAQ
1.How can I place an order for LM2623QNHLTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2623QNHLTQ1 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 LM2623QNHLTQ1 reliable?
The price and inventory of LM2623QNHLTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2623QNHLTQ1 is usually 5 days.
3.What payment methods are accepted for LM2623QNHLTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2623QNHLTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2623QNHLTQ1?
LM2623QNHLTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2623QNHLTQ1 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 LM2623QNHLTQ1?
For technical support, including LM2623QNHLTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2623QNHLTQ1 requirements.
6.How does Aetrix verify that LM2623QNHLTQ1 is sourced from the original manufacturer or authorized distributors?
All LM2623QNHLTQ1 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 LM2623QNHLTQ1 meets industry standards.
7.What is the process for return or replacement of LM2623QNHLTQ1?
All LM2623QNHLTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2623QNHLTQ1, 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 LM2623QNHLTQ1 part is unused and in its original packaging.
Return procedure for LM2623QNHLTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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