My Inquiry
My Account
Texas Instruments LM34919BTL/NOPB
- Part No.:
- LM34919BTL/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFBGA
- Datasheet:
-
LM34919BTL/NOPB.pdf
- Description:
- IC REG BUCK ADJ 600MA 10DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:210
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM34919BTL/NOPB from Texas Instruments is a constant on-time synchronous buck switching regulator IC with integrated 0.5–1.0 Ω N-channel MOSFET switch, operating from 6 V to 40 V input and delivering up to 600 mA output current at adjustable voltage (2.5 V reference). It features 2.6 MHz max switching frequency, valley current limit at 0.64 A, and ultra-fast transient response-designed for automotive point-of-load regulation in infotainment and safety systems.
For engineers reviewing the LM34919BTL/NOPB datasheet, LM34919BTL/NOPB pinout, LM34919BTL/NOPB application, or LM34919BTL/NOPB equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal shutdown behavior (175 °C), exact DSBGA-10 package mapping, and two rigorously cross-checked alternative regulators for high-voltage POL designs.
Technical Context
The LM34919BTL/NOPB implements a constant on-time control architecture where tON is programmable via external RON and inversely scales with VIN, enabling stable ~1.5–2.6 MHz operation across 6–40 V input and full load range. Its valley-current-limit detection circuit monitors recirculating current through ISEN/SGND with 50 ns response time and fixed 0.64 A threshold.
No loop compensation is required due to inherent stability of the constant on-time scheme; regulation relies on 2.5 V internal reference compared against FB pin voltage, with overvoltage protection triggered at 2.9 V. Startup uses an integrated 7.0 V VCC regulator with 5.25 V UVLO and 15 mA current limit, supporting auxiliary biasing up to 14 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.0 V to 40 V - supports direct connection to automotive battery rails including cold-crank transients up to 44 V. |
| Output Current | 600 mA continuous - limited by valley current sense at 0.64 A; peak switch current capability is 1.5 A. |
| Switching Frequency | Up to 2.6 MHz - enables compact magnetics and low-profile designs; frequency remains stable vs. line/load due to VIN-tON inverse relationship. |
| Feedback Reference | 2.500 V ±1.2% - sets output voltage via external resistor divider (VOUT = 2.5 × (R1 + R2)/R2); <1 nA bias current ensures accuracy. |
| Current Limit Threshold | 0.64 A nominal - triggers off-time extension during overload; transitions smoothly from CV to CC mode without foldback. |
| Thermal Shutdown | 175 °C activation with 20 °C hysteresis - protects die during sustained overload or poor PCB thermal design. |
| VCC Regulator | 7.0 V ±0.4 V, 15 mA current-limited - powers internal gate driver and logic; supports external bias (7–14 V) to reduce dissipation. |
Pinout & Package
LM34919BTL/NOPB is housed in a 10-pin DSBGA (Die Size Ball Grid Array) package measuring 1.5 mm × 1.5 mm × 0.55 mm, optimized for space-constrained automotive modules. Pin layout follows TI's standard bump-side view with 0.4 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1: RON/SD | On-time programming & shutdown control | Resistor from VIN sets tON; grounding disables regulator and discharges SS capacitor. |
| A2: RTN | Main circuit ground | Reference for all internal circuits except current sense path; connects to system ground plane. |
| A3: FB | Feedback input | Compares output voltage (via resistor divider) to 2.5 V reference; requires ≥25 mVpp ripple for stable operation. |
| B1: SGND | Sense ground return | Carries recirculating inductor current to internal sense resistor; must be routed separately from RTN to avoid noise coupling. |
| B3: SS | Soft-start timing node | Internal 10.5 µA current source charges external capacitor to 2.5 V, controlling output ramp rate. |
| C1: ISEN | Current sense output | Outputs sensed recirculating current; used for valley current limit detection at 0.64 A threshold. |
| C3: VCC | Startup regulator output | Provides 7.0 V bias for gate driver; can accept external 7–14 V supply to bypass internal regulator. |
| D1: VIN | Main input supply | Accepts 6–40 V; absolute max 44 V; powers startup regulator and high-side gate driver via internal diode. |
| D2: SW | Switching node | Connects to inductor, freewheeling diode cathode, and BST capacitor; swings from −1.5 V to VIN. |
| D3: BST | Bootstrap capacitor connection | Requires 0.022 µF ceramic capacitor to SW; charged from VCC during off-time to drive high-side MOSFET gate. |
Key Features
| Feature | Design Value |
|---|---|
| Constant on-time control | Eliminates need for external compensation network; enables <1 µs load transient recovery and stable operation across wide VIN/IOUT range. |
| Integrated N-channel buck switch | RDS(on) = 0.5–1.0 Ω - reduces BOM count and PCB area; supports 600 mA continuous output without external FET. |
| Valley current limiting | 0.64 A threshold with 50 ns response - provides smooth current foldback during short-circuit, avoiding destructive peak currents. |
| Ultra-small DSBGA-10 package | 1.5 mm × 1.5 mm footprint - enables placement directly under processors or near connectors in tight automotive ECUs. |
| Automotive-grade qualification | AEC-Q100 Grade 1 (−40 °C to +125 °C junction) - validated for safety-critical infotainment and ADAS power rails. |
Applications
| Automotive Infotainment Power Supply | ADAS Camera Module Bias Rail |
|---|---|
|
Use Scenario: Powers DSP, display controller, and audio codec in head-unit systems with 12 V battery input and 3.3 V/5 V requirements. IC Role / Device Role / Timing Role: Primary step-down POL regulator delivering 600 mA at 3.3 V with fast transient response to handle burst-mode video processing loads. Use Value: 2.6 MHz switching enables use of 2.2 µH inductors and 10 µF ceramic output caps, reducing solution size by >40% vs. 500 kHz alternatives. |
Use Scenario: Supplies clean 1.8 V or 2.8 V rail to CMOS image sensor and ISP in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: High-efficiency buck converter operating from 6–16 V automotive input, rejecting load-dump transients up to 44 V. Use Value: Valley current limit prevents latch-up during sensor pixel reset surges; soft-start avoids camera frame corruption during power-up. |
| Industrial Telematics Tracker | Secondary Post-Regulator in Telecom Systems |
|
Use Scenario: Generates 5 V from 24 V vehicle bus for GPS/GSM modem and MCU in fleet management devices. IC Role / Device Role / Timing Role: Input-stage buck regulator handling wide VIN range and ESD-robust operation per ISO 10605. Use Value: Integrated VCC startup regulator eliminates need for external LDO; 175 °C thermal shutdown prevents field failures in sealed enclosures. |
Use Scenario: Provides isolated 3.3 V bias for FPGA configuration or PHY interface downstream of primary 48 V telecom DC/DC. IC Role / Device Role / Timing Role: Non-isolated secondary buck stage converting intermediate 12 V or 15 V to low-noise digital core voltage. Use Value: No loop compensation simplifies layout in multi-rail telecom boards; 2.5 V reference tolerance ensures accurate voltage margining. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM34919B-Q1 | AEC-Q100 Grade 0 (−40 °C to +150 °C), identical electrical specs and pinout - differs only in automotive qualification level and traceability documentation. | Required for ASIL-B/C safety-critical systems; same PCB layout and bill-of-materials as LM34919BTL/NOPB. | Select LM34919B-Q1 when functional safety compliance (ISO 26262) or extended temperature validation is mandated. |
| TPS54202HDDCR | 4.5–28 V input, 2 A output, 2.5 V reference, but uses current-mode control with external compensation; 6-pin SOT-23 package. | Higher current capacity but narrower VIN range; lacks valley current limit and bootstrap gate drive; not AEC-Q100 qualified. | Choose TPS54202HDDCR only for non-automotive 24 V industrial applications requiring >600 mA, accepting larger solution size and added compensation complexity. |
Compared with LM34919B-Q1, the LM34919BTL/NOPB offers identical performance at lower qualification cost for non-safety-critical automotive modules; versus TPS54202HDDCR, it delivers superior transient response, wider input range, and smaller footprint-but with lower output current and stricter layout requirements for DSBGA thermal management.
Availability
LM34919BTL/NOPB is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics requiring stable component supply, AEC-Q100-compliant sourcing, and long-term production continuity.
Supply support for LM34919BTL/NOPB 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 decades of automotive qualification expertise and broad manufacturing scale.
The LM34919BTL/NOPB belongs to TI's high-voltage buck regulator product line, engineered specifically for compact, efficient point-of-load conversion in automotive and industrial environments where input transients, thermal constraints, and board space are critical.
FAQ
What is the maximum input voltage rating for the LM34919BTL/NOPB?
The LM34919BTL/NOPB has an absolute maximum VIN-to-RTN rating of 44 V, with recommended continuous operation from 6 V to 40 V. This allows direct connection to 12 V and 24 V automotive systems, including cold-crank and load-dump conditions. Exceeding 44 V risks permanent damage to the internal N-channel switch and startup regulator.
Does the LM34919BTL/NOPB require external compensation components?
No, the LM34919BTL/NOPB uses a constant on-time control architecture that eliminates the need for external compensation networks. Stability is inherent to the topology, enabling robust operation across input voltage and load variations without adding resistors or capacitors to the feedback loop-reducing BOM count and layout sensitivity.
How is the switching frequency set on the LM34919BTL/NOPB?
The LM34919BTL/NOPB switching frequency is determined by the external RON resistor connected between VIN and the RON/SD pin, and varies inversely with input voltage. For example, with RON = 28 kΩ and VIN = 12 V, typical frequency is ~1.49 MHz; at VIN = 24 V, frequency increases toward 2.6 MHz. Minimum off-time limits maximum achievable frequency.
What is the purpose of the ISEN and SGND pins on the LM34919BTL/NOPB?
The ISEN pin outputs the recirculating inductor current during the off-time for valley current limit detection, while SGND serves as the dedicated return path for that current to the internal sense resistor. Separating SGND from RTN prevents noise coupling into the current sense path-critical for accurate 0.64 A current limit triggering and stable light-load operation.
Can the LM34919BTL/NOPB be used in thermally constrained automotive modules?
Yes-the LM34919BTL/NOPB includes thermal shutdown at 175 °C with 20 °C hysteresis and is qualified for junction temperatures up to +125 °C. Its DSBGA-10 package supports solder thermal vias to inner ground planes; TI recommends ≥4 thermal vias under the exposed die pad and minimum 1 oz copper on both sides for reliable operation at full 600 mA load in sealed enclosures.
LM34919BTL/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFBGA
- 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):
- 6V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 35V
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DSBGA
LM34919BTL/NOPB FAQ
1.How can I place an order for LM34919BTL/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM34919BTL/NOPB 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 LM34919BTL/NOPB reliable?
The price and inventory of LM34919BTL/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM34919BTL/NOPB is usually 5 days.
3.What payment methods are accepted for LM34919BTL/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM34919BTL/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM34919BTL/NOPB?
LM34919BTL/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM34919BTL/NOPB 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 LM34919BTL/NOPB?
For technical support, including LM34919BTL/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM34919BTL/NOPB requirements.
6.How does Aetrix verify that LM34919BTL/NOPB is sourced from the original manufacturer or authorized distributors?
All LM34919BTL/NOPB 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 LM34919BTL/NOPB meets industry standards.
7.What is the process for return or replacement of LM34919BTL/NOPB?
All LM34919BTL/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM34919BTL/NOPB, 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 LM34919BTL/NOPB part is unused and in its original packaging.
Return procedure for LM34919BTL/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM34919BTL/NOPB 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…
