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Texas Instruments LM43600AQPWPRQ1
- Part No.:
- LM43600AQPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM43600AQPWPRQ1.pdf
- Description:
- IC REG BUCK ADJ 500MA 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,665
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Product details
Overview
LM43600AQPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified synchronous step-down DC-DC converter delivering up to 0.5 A at output voltages from 1 V to 28 V, with input voltage range 3.5 V to 36 V (42 V transient), 33 µA quiescent current in regulation, and internal compensation for minimal external components. It serves as a primary power supply in automotive infotainment and ADAS subsystems requiring high efficiency and EMI compliance.
For engineers reviewing the LM43600AQPWPRQ1 datasheet, LM43600AQPWPRQ1 pinout, LM43600AQPWPRQ1 application, or LM43600AQPWPRQ1 equivalent, key selection criteria include its PFM/DCM light-load efficiency mode, EN pin precision UVLO (2.1 V ±30 mV), 500 kHz default switching frequency, and integrated power-good flag with 6% hysteresis - all validated for automotive ambient temperatures from –40°C to +125°C.
Technical Context
The LM43600AQPWPRQ1 employs peak current mode control with fixed-frequency PWM, supporting discontinuous conduction mode (DCM) and pulse frequency modulation (PFM) for light-load efficiency optimization. Its internal compensation eliminates external loop components, while programmable frequency (200 kHz–2.2 MHz via RT pin) enables layout- and noise-sensitive design trade-offs.
It integrates high-side (419 mΩ) and low-side (231 mΩ) MOSFETs, a precision 1.016 V feedback reference (±12 mV over –40°C to +125°C), and hiccup-mode short-circuit protection triggered by valley current limit (0.60 A typical). The BIAS pin supports efficiency improvement by connecting to VOUT (3.3–28 V) or external 3.3/5 V rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 36 V (42 V transient tolerant); supports wide automotive battery and industrial supply rails without pre-regulation. |
| Output Current | 0.5 A continuous; sufficient for powering microcontrollers, sensors, and interface ICs in safety-critical ECUs. |
| Quiescent Current | 33 µA in regulation; enables always-on functionality in vehicle body electronics with minimal battery drain. |
| Feedback Reference | 1.016 V ±12 mV (–40°C to +125°C); ensures <±1% output accuracy across automotive temperature range. |
| Switching Frequency | Default 500 kHz; adjustable 200 kHz–2.2 MHz via RT pin; balances efficiency, size, and EMI in compact PCB layouts. |
| Power-Good Flag | Open-drain PGOOD with 113% OV / 90% UV thresholds and 6% hysteresis; provides reliable system sequencing and fault detection. |
| Enable Threshold | Precision EN pin with 2.1 V rising threshold (±30 mV) and 200 mV hysteresis; allows accurate system-level undervoltage lockout programming. |
Pinout & Package
The LM43600AQPWPRQ1 is housed in a 16-pin HTSSOP (PWP) package measuring 6.6 mm × 5.1 mm × 1.2 mm with 0.65 mm lead pitch and exposed thermal pad (PAD) for enhanced heat dissipation to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1, 2) | Switch node | Connects to inductor; carries high di/dt switching current; requires low-inductance layout to minimize EMI and voltage spikes. |
| CBOOT (3) | Bootstrap capacitor connection | Supplies gate drive for high-side FET; requires 470 nF ceramic capacitor between CBOOT and SW for reliable operation. |
| VCC (4) | Internal LDO output | Bypassed to AGND with capacitor; powers internal circuitry; must not be loaded externally or shorted to ground. |
| BIAS (5) | Optional LDO input | Improves efficiency when tied to VOUT (3.3–28 V) or external 3.3/5 V rail; bypassed with 1–10 µF capacitor if used. |
| SYNC (6) | External clock input | Enables synchronization to system clock (200 kHz–2.2 MHz); must be terminated properly or grounded if unused. |
| RT (7) | Frequency programming | Resistor to AGND sets switching frequency; open circuit defaults to 500 kHz; supports precise EMI band placement. |
| PGOOD (8) | Power-good flag | Open-drain output indicating regulated output; requires 10–100 kΩ pull-up to logic rail ≤12 V for system monitoring. |
| FB (9) | Feedback sense | Monitors output voltage divider midpoint; 1.016 V reference enables accurate VOUT setting from 1 V to 28 V. |
| AGND (10) | Analog ground | Reference for internal references and error amplifier; must connect directly to low-noise system ground plane. |
| SS/TRK (11) | Soft-start/tracking control | Controls startup slew rate (internal 4.1 ms) or enables output voltage tracking of another rail via external ramp. |
| EN (12) | Enable input | Logic-level control (2.1 V threshold); supports precision UVLO, sequencing, or microcontroller shutdown control. |
| VIN (13, 14) | Main input supply | Connects to input capacitors and power source; dual pins reduce IR drop and improve thermal performance. |
| PGND (15, 16) | Power ground | Low-side FET return path; must tie to AGND, PAD, and input/output capacitor grounds with minimal trace length. |
| PAD | Thermal pad | Internally connected to AGND; primary heat dissipation path; must be soldered to large PCB copper area for thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient); qualified for safety-critical automotive applications including ADAS and infotainment. |
| Light-load efficiency mode | Automatic transition to DCM and PFM below ~10% load; maintains >85% efficiency at 1 mA output current. |
| EMI compliance | Tested to EN55022/CISPR 22 Class B radiated/conducted emissions limits; reduces need for external filtering in automotive designs. |
| Pre-biased soft-start | Safe startup into pre-charged output capacitors; prevents reverse current flow and system reset during hot-plug events. |
| Output short-circuit protection | Hiccup mode with 5.5 ms retry delay and 32-cycle wait; limits power dissipation during sustained faults without latch-off. |
| Stable with diverse capacitors | Compatible with ceramic, polymer, tantalum, and aluminum electrolytic output capacitors; simplifies BOM and sourcing. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powers SoC, display controller, and audio codec in automotive head units with variable battery voltage (9–16 V). IC Role / Device Role / Timing Role: Primary 3.3 V/5 V buck regulator providing stable, low-noise supply with fast transient response. Use Value: 33 µA quiescent current extends battery life in accessory mode; PFM mode maintains >90% efficiency at standby loads. | Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera modules exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Point-of-load regulator converting 12 V battery to 1.8 V/3.3 V for sensor and processing rails. Use Value: AEC-Q100 Grade 1 rating ensures reliable operation at +125°C ambient; thermal shutdown (160°C) prevents field failures. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Regulates power for door module microcontrollers, LIN transceivers, and LED drivers in vehicle body electronics. IC Role / Device Role / Timing Role: Always-on buck converter with precision enable for controlled wake-up and deep-sleep sequencing. Use Value: 2.1 V EN threshold enables accurate system-level UVLO; soft-start into pre-biased load prevents bus glitches during wake-up. | Use Scenario: Provides clean 3.3 V supply to cellular modem, GNSS receiver, and CAN transceiver in connected vehicle platforms. IC Role / Device Role / Timing Role: EMI-optimized buck regulator meeting automotive radiated emission limits without added shielding. Use Value: EN55022 Class B compliance verified on evaluation board; SYNC pin allows spread-spectrum alignment with baseband clock. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM43601QPWPRQ1 | 1 A output current, identical pinout and feature set; higher RDS(on) (HS: 470 mΩ, LS: 250 mΩ). | Required where load exceeds 0.5 A but board space and thermal budget constrain use of larger packages. | Select when future-proofing for higher current or sharing layout with 1 A variant; no PCB changes needed. |
| TPS54360BQPWPRQ1 | 3.5–60 V input, 3.5 A output, external compensation; no integrated PGOOD or BIAS pin; higher IQ (146 µA). | Suitable for higher-power systems needing wider VIN range and adjustable loop response, but increases design complexity. | Choose when input can exceed 36 V or output current >0.5 A is required; requires redesign of compensation and feedback network. |
Compared with LM43601QPWPRQ1, the LM43600AQPWPRQ1 offers lower conduction loss at 0.5 A loads and reduced solution size; versus TPS54360BQPWPRQ1, it trades off input voltage headroom and output current for simpler layout, lower quiescent current, and integrated features like PGOOD and BIAS.
Availability
LM43600AQPWPRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control modules requiring stable component supply with full AEC-Q100 documentation and long-term production support.
Supply support for LM43600AQPWPRQ1 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 deep expertise in automotive-grade IC design and manufacturing.
The LM43600-Q1 product line delivers highly integrated, AEC-Q100-qualified DC-DC converters optimized for space-constrained automotive subsystems requiring high efficiency, low EMI, and robust thermal performance.
FAQ
What is the maximum input voltage rating for the LM43600AQPWPRQ1?
The LM43600AQPWPRQ1 has an absolute maximum input voltage rating of 42 V, with recommended operating range from 3.5 V to 36 V. This 42 V transient tolerance accommodates automotive load-dump conditions per ISO 7637-2, ensuring robustness in 12 V and 24 V vehicle electrical systems without external clamping circuitry.
Does the LM43600AQPWPRQ1 support output voltage tracking?
Yes, the LM43600AQPWPRQ1 supports output voltage tracking via the SS/TRK pin. When an external voltage ramp is applied to this pin, the output voltage follows that ramp during startup or dynamic reconfiguration, enabling coordinated power sequencing with other rails in multi-rail systems such as automotive domain controllers.
How does the BIAS pin improve efficiency in the LM43600AQPWPRQ1?
The BIAS pin improves efficiency by allowing the internal LDO to draw bias current from the output rail (VOUT) instead of VIN when 3.3 V ≤ VOUT ≤ 28 V. This reduces power loss in the LDO stage, particularly at high input-to-output voltage differentials, and is confirmed in TI's electrical characteristics table with separate IQ measurements for VIN- and BIAS-supplied operation.
What is the purpose of the PGOOD pin on the LM43600AQPWPRQ1?
The PGOOD pin on the LM43600AQPWPRQ1 is an open-drain power-good flag that asserts high when the output voltage is within ±7% of regulation (113% OV / 90% UV thresholds). It provides system-level monitoring for safe processor boot, fault detection, and power sequencing - critical in automotive applications where unregulated supply can cause ECU malfunction.
Is the LM43600AQPWPRQ1 pin-compatible with other devices in the LM4360x family?
Yes, the LM43600AQPWPRQ1 is pin-to-pin compatible with the LM43601QPWPRQ1 (1 A), LM43602QPWPRQ1 (2 A), and LM43603QPWPRQ1 (3 A) in the same HTSSOP-16 (PWP) package. This enables scalable power design with shared PCB layout, reducing development time and qualification effort across vehicle platforms.
LM43600AQPWPRQ1 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):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 500mA
- 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
LM43600AQPWPRQ1 FAQ
1.How can I place an order for LM43600AQPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM43600AQPWPRQ1 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 LM43600AQPWPRQ1 reliable?
The price and inventory of LM43600AQPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM43600AQPWPRQ1 is usually 5 days.
3.What payment methods are accepted for LM43600AQPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM43600AQPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM43600AQPWPRQ1?
LM43600AQPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM43600AQPWPRQ1 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 LM43600AQPWPRQ1?
For technical support, including LM43600AQPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM43600AQPWPRQ1 requirements.
6.How does Aetrix verify that LM43600AQPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All LM43600AQPWPRQ1 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 LM43600AQPWPRQ1 meets industry standards.
7.What is the process for return or replacement of LM43600AQPWPRQ1?
All LM43600AQPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM43600AQPWPRQ1, 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 LM43600AQPWPRQ1 part is unused and in its original packaging.
Return procedure for LM43600AQPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM43600AQPWPRQ1 Tags
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